This document summarizes recent advances in dental impression materials. It discusses improvements made to alginate impression materials, including extended pour times, tray adhesives, reduced dust, and antimicrobial properties. It also describes advances in elastomeric materials like addition silicones, which provide highly accurate impressions with dimensional stability and short setting times. Digital impression systems offer advantages of speed and accuracy but also have limitations. Overall, the document outlines key properties desired in impression materials and new formulations that improve user experience and clinical outcomes.
Dental cements have evolved significantly since the first cements were introduced in the late 1800s. Zinc phosphate cement, introduced in the late 1800s, was one of the earliest dental cements and remains the gold standard against which newer cements are compared. In the 1960s, polycarboxylate cement was introduced and was the first cement system to provide an adhesive bond to tooth structure. Glass ionomer cement, introduced in the 1970s, also chemically bonds to tooth structure and was a significant development as it was the first cement with anticariogenic properties.
This document discusses various die materials used for fixed prosthodontics. It begins by defining key terms like die and cast. It then describes the most commonly used die materials like gypsum products (dental stones), die stones, epoxy resins, and others. For each material, it covers properties, advantages, disadvantages and appropriate uses. It also discusses techniques to improve die properties and compatibility with different impression materials. Finally, it provides a comparison of different die materials in terms of their strengths and limitations. The overall document serves as a comprehensive guide to selecting and using die materials for fixed prosthodontic procedures.
There have been several changes since inception in the field of dental ceramics. Need for newer materials with improved aesthetics, flexural strength and optical properties made it necessary for introduction of advanced technology in fabrication of dental ceramics.
This document discusses various materials used for fabricating dental dies, including their properties and uses. It covers gypsum products like dental stone (Type III and high-strength Type IV and V stones), electroformed dies using copper or silver plating, epoxy resins, and flexible die materials like polyvinyl and polyurethane. Each material has advantages like detail reproduction, strength and disadvantages like shrinkage, toxicity or incompatibility with some impression materials. Newer ceramic and CAD/CAM die materials are also introduced that are strong and dimensionally stable.
Condensation silicone was the first type of silicone impression material developed. It sets via a condensation reaction at room temperature, producing an alcohol byproduct. While condensation silicones have lower cost and sufficient working time, their dimensional stability is compromised over time due to the volatile byproduct. More advanced addition silicone and polyether materials provide better accuracy due to less shrinkage.
This document provides an overview of maxillofacial prosthetic materials. It begins with definitions and introduces various materials used, including acrylic resins, vinyl plastisols, polyurethane, silicones, and newer materials. Each material is described in terms of its composition, advantages, and disadvantages. The document also discusses ideal properties, classifications, a literature review on the history of materials, physical properties comparisons, processing techniques, and concludes with an introduction to newer developments in materials science.
Dental cements have evolved significantly since the first cements were introduced in the late 1800s. Zinc phosphate cement, introduced in the late 1800s, was one of the earliest dental cements and remains the gold standard against which newer cements are compared. In the 1960s, polycarboxylate cement was introduced and was the first cement system to provide an adhesive bond to tooth structure. Glass ionomer cement, introduced in the 1970s, also chemically bonds to tooth structure and was a significant development as it was the first cement with anticariogenic properties.
This document discusses various die materials used for fixed prosthodontics. It begins by defining key terms like die and cast. It then describes the most commonly used die materials like gypsum products (dental stones), die stones, epoxy resins, and others. For each material, it covers properties, advantages, disadvantages and appropriate uses. It also discusses techniques to improve die properties and compatibility with different impression materials. Finally, it provides a comparison of different die materials in terms of their strengths and limitations. The overall document serves as a comprehensive guide to selecting and using die materials for fixed prosthodontic procedures.
There have been several changes since inception in the field of dental ceramics. Need for newer materials with improved aesthetics, flexural strength and optical properties made it necessary for introduction of advanced technology in fabrication of dental ceramics.
This document discusses various materials used for fabricating dental dies, including their properties and uses. It covers gypsum products like dental stone (Type III and high-strength Type IV and V stones), electroformed dies using copper or silver plating, epoxy resins, and flexible die materials like polyvinyl and polyurethane. Each material has advantages like detail reproduction, strength and disadvantages like shrinkage, toxicity or incompatibility with some impression materials. Newer ceramic and CAD/CAM die materials are also introduced that are strong and dimensionally stable.
Condensation silicone was the first type of silicone impression material developed. It sets via a condensation reaction at room temperature, producing an alcohol byproduct. While condensation silicones have lower cost and sufficient working time, their dimensional stability is compromised over time due to the volatile byproduct. More advanced addition silicone and polyether materials provide better accuracy due to less shrinkage.
This document provides an overview of maxillofacial prosthetic materials. It begins with definitions and introduces various materials used, including acrylic resins, vinyl plastisols, polyurethane, silicones, and newer materials. Each material is described in terms of its composition, advantages, and disadvantages. The document also discusses ideal properties, classifications, a literature review on the history of materials, physical properties comparisons, processing techniques, and concludes with an introduction to newer developments in materials science.
The document discusses residual ridge resorption (RRR), which is the progressive loss of jaw bone after tooth extraction. It defines RRR and provides classifications. RRR is considered a pathological process due to its variability between individuals. The document covers the epidemiology, etiology, and risk factors of RRR, including anatomical, mechanical, metabolic and prosthetic factors. Treatment aims to prevent or reduce RRR through denture design and patient education.
The temporomandibular joint (TMJ) is a bilateral joint that connects the mandible to the temporal bone. It has several unique characteristics, including being the only joint with a rigid endpoint of closure. The TMJ has bony, fibrous, and muscular components that allow for hinge, protrusive, and lateral movements. Prosthodontic treatments must consider the anatomy and biomechanics of the TMJ.
This document provides an overview of different elastomeric impression materials used in dentistry, including their composition, setting reactions, properties, advantages, and disadvantages. It discusses polysulfide rubber, condensation silicone, addition silicone, and polyether impression materials. It also covers general properties like working and setting times, dimensional stability, reproduction of details, disinfection, tear strength, biocompatibility, and effects of mishandling. Recently, visible light-cured polyether urethane dimethacryl materials have been introduced as well.
The document discusses various materials used in maxillofacial prosthetics. It describes ideal materials as being biocompatible, flexible, colorable, chemically stable, easy to process, and strong. Room temperature vulcanizing materials and modeling materials like clay, plaster, and wax are introduced. The fabrication phase uses extraoral materials like acrylics, vinyl polymers, and elastomers like polyurethane and silicone, which are considered most desirable due to their strength. High temperature vulcanizing silicone provides good strength and detail but requires specialized equipment for processing.
Tissue conditioners are temporary denture liners composed of polyethylmethacrylate and aromatic esters that form a gel when mixed. They have several uses: as adjuncts for tissue healing by protecting irritated tissues before denture fabrication; as temporary obturators over existing dentures; to stabilize denture bases and surgical splints; and to diagnose the effects of resilient denture liners. Tissue conditioners are applied by reducing the denture base, mixing the three components, and molding the material to the denture tissues. They require gentle cleaning to prevent tearing but only provide temporary relief due to loss of plasticizers over 4-8 weeks.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Prosthodontics - realeff relevance in complete dentureKIIT ,BHUBANESWAR
The document discusses the Realeff effect, which refers to the resiliency and compressibility of oral mucosa that complete dentures rest on. It affects all steps of complete denture fabrication from impressions to final insertion. Factors like tissue health, consistency, and age can influence the Realeff effect. Understanding this effect is important for denture stability and preventing trauma to supporting tissues during the denture fabrication process.
Elastomeric impression materials include polysulfide, condensation silicone, addition silicone, and polyether rubbers. They set via polymerization reactions, with setting times of 8-12 minutes on average. Polysulfide and condensation silicone set via condensation reactions producing water or alcohol as byproducts, while addition silicone and polyether set via addition reactions without byproducts. Polysulfide has the highest detail reproduction but all materials exhibit some polymerization shrinkage. Materials are available in light, medium, heavy or putty consistencies for use with stock or custom trays. Proper manipulation is required for accurate impressions.
Tissue conditioners and denture liners are used to improve the fit and comfort of removable dentures. They can be classified based on their curing method, composition, durability, consistency and other properties. Tissue conditioners are temporary soft liners that help condition traumatized tissue, while hard and soft denture liners provide a more permanent resilient layer. Relining or rebasing dentures helps maintain proper fit as ridges resorb over time. Selection of the appropriate liner depends on the clinical situation and needs of the patient.
This document discusses gingival retraction, which is the deflection of marginal gingiva away from a tooth to facilitate impression making of subgingival margins. It defines gingival retraction and describes the biologic width and clinical assessment of gingival biotypes. Various criteria for effective gingival retraction are provided. Methods of gingival retraction include mechanical retraction cords, chemicomechanical agents, and surgical techniques like rotary curettage and electrosurgery. Fluid control during the procedure involves tools like high-volume evacuation, saliva ejectors, and antisialagogues. Gingival retraction allows for visualization and impression of subgingival tooth margins and
brief description about pressable ceramicsCONTENTS: • Introduction • Definition For Dental Ceramics • Definition For Pressable Ceramics • History • Various All Ceramic Systems • Classification • Pressable Ceramics • History • Generation Of Pressable Ceramics • Cerestore – Development Fabrication Advantage Disadvantage 2
3. IPS Empress - Materials And Composition Special Furnace Fabrication Advantage Disadvantage IPS Empress 2- INDICATION Properties Fabrication Method Advantage Disadvantage IPS Emax Press - Microstructure Composition Properties OPC 3G- Development Indication Properties 3
4. INTRODUCTION There have been significant TECHNOLOGICAL advances in the field of dental ceramics over the last 10 years which have made a corresponding increase in the number of materials available. Improvements in strength, clinical performance, and longevity have made all ceramic restorations more popular and more predictable 4
5. DEFINITION FOR DENTAL CERAMICS⁶ An inorganic compound with non metallic properties typically consisting of oxygen and one or more metallic or semi metallic elements (e.g ;Aluminium, Calcium, Lithium, Mangnesium, Potassium, Sodium, Silicon, Tin , Titanium And Zirconium)that is formulated to produce the whole or part of a ceramic based dental prosthesis 5
6. DEFINITION FOR PRESSABLE CERAMICS ⁶ • A ceramic that can be heated to a specified temperature and forced under pressure to fill a cavity in a refractory mold 6
7. HISTORY OF DENTAL CERAMICS ⁶ • 1789-first porcelain tooth material by a French dentist De Chemant • 1774- mineral paste teeth by Duchateau in England • 1808-terrometallic porcelain teeth by Italian dentist Fonzi • 1817- Planteu introduced porcelain teeth in US • 1837- Ash developed improved version of porcelain teeth 7
8. • 1903 – Dr.Charless introduced ceramic crowns in dentistry he fabricate ceramic crown using platinum foil matrix and high fusing feldspathic porcelain excellent esthetics but low flexural strength resulted in failure • 1965- dental aluminous core Porcelain by Mclean and Huges • 1984- Dicor by Adair and Grossman 8
9. 9
10. VARIOUS ALL CERAMIC SYSTEMS Aluminous core ceramics Slip cast ceramics Heat pressed ceramics Machined ceramics Machined and sintered ceramics Metal reinforced system 10
11. MICROSTRUCTURAL CLASSIFICATION⁵ Category 1: Glass-based systems (mainly silica) Category 2: Glass-based systems (mainly silica) with fillers usually crystalline (typically leucite or a different high-fusing glass) a) Low-to-moderate leucite-
Muscles of mastication prosthodontic considerationNeerajaMenon4
The document discusses the muscles involved in mastication and their influence on denture borders. It describes the masseter muscle pushing the buccinator medially, requiring a masseteric groove contour in dentures. The medial pterygoid contracts during closing and influences the retromylohyoid border. Temporalis and lateral pterygoid position the condyles in centric relation, with lateral pterygoid controlling condylar movement during function. Occlusal splints promote muscle relaxation and neuromuscular harmony.
The document provides information on various dental impression materials, including their history, composition, properties and uses. It discusses early materials like beeswax and impression compounds. It also covers alginate, which is the most widely used material due to its ease of use. Other elastic materials discussed include polysulfide, which was the first synthetic elastomer, and condensation silicone. The ideal properties of impression materials and their classifications are also outlined.
This document discusses the disinfection of dental impressions for various impression materials. It defines disinfection and lists common disinfectants used. The main methods of disinfection are immersion and spraying. For each impression material, including alginate, compound, zinc oxide, polysulfide silicone and polyether, the recommended disinfectants and methods are provided. Short exposure times are essential to avoid distortion, especially for hydrocolloids and polyethers. Proper disinfection prevents disease transmission while maintaining dimensional stability.
This document discusses metal-free ceramics used in dentistry. It provides definitions of various types of ceramics like feldspathic porcelain, glass ceramics, and zirconia. The document discusses the history, classification, composition, properties and strengthening techniques of ceramics. It also compares different metal-free ceramic systems and discusses their clinical applications and cementation.
This document discusses articulators, which are mechanical devices that simulate jaw movement. It covers the purposes, uses, requirements, advantages, limitations, and classifications of articulators. Articulators are used to mount dental casts and simulate jaw motions like opening and closing in order to diagnose occlusion, plan treatments, fabricate dental restorations, and arrange artificial teeth. They must accurately maintain the spatial relationship of dental casts and allow for various jaw motions and records. The document classifies articulators based on their function, the theories of occlusion they are based on, the records they can accept, and their degree of adjustability.
The document discusses different types of articulators used in dentistry based on various classification systems. It describes Bonwill's theory of condylar guidance which defines a triangle formed by the condylar contact points and incisal edge. It also outlines Sharry's four class classification of articulators based on their adjustability and ability to accept registrations. Key articulator types mentioned are non-adjustable, semi-adjustable, and fully-adjustable.
Impression materials and recent advances.pptxMuskan Agarwal
The document discusses dental impression materials and recent advances. It defines a dental impression and describes the desirable properties of impression materials including biocompatibility, rheological properties, and mechanical and thermal properties. It covers various types of impression materials including alginate, elastomers like polysulfide, silicone, and polyether materials. Recent advances in alginate, silicone, and polyether impressions are discussed. The document also mentions digital imaging and intraoral scanning.
The document discusses dental impression materials. It defines a dental impression as a negative record of the tissues in the mouth. Impressions are used to reproduce the teeth and surrounding areas to create positive models or casts. There are two main types of impression materials - rigid materials that cannot engage undercuts, and elastic materials that can engage undercuts. Common elastic materials discussed include alginate, polysulfide rubber, silicone, and polyether. The document outlines the characteristics and properties required of good impression materials.
The document discusses residual ridge resorption (RRR), which is the progressive loss of jaw bone after tooth extraction. It defines RRR and provides classifications. RRR is considered a pathological process due to its variability between individuals. The document covers the epidemiology, etiology, and risk factors of RRR, including anatomical, mechanical, metabolic and prosthetic factors. Treatment aims to prevent or reduce RRR through denture design and patient education.
The temporomandibular joint (TMJ) is a bilateral joint that connects the mandible to the temporal bone. It has several unique characteristics, including being the only joint with a rigid endpoint of closure. The TMJ has bony, fibrous, and muscular components that allow for hinge, protrusive, and lateral movements. Prosthodontic treatments must consider the anatomy and biomechanics of the TMJ.
This document provides an overview of different elastomeric impression materials used in dentistry, including their composition, setting reactions, properties, advantages, and disadvantages. It discusses polysulfide rubber, condensation silicone, addition silicone, and polyether impression materials. It also covers general properties like working and setting times, dimensional stability, reproduction of details, disinfection, tear strength, biocompatibility, and effects of mishandling. Recently, visible light-cured polyether urethane dimethacryl materials have been introduced as well.
The document discusses various materials used in maxillofacial prosthetics. It describes ideal materials as being biocompatible, flexible, colorable, chemically stable, easy to process, and strong. Room temperature vulcanizing materials and modeling materials like clay, plaster, and wax are introduced. The fabrication phase uses extraoral materials like acrylics, vinyl polymers, and elastomers like polyurethane and silicone, which are considered most desirable due to their strength. High temperature vulcanizing silicone provides good strength and detail but requires specialized equipment for processing.
Tissue conditioners are temporary denture liners composed of polyethylmethacrylate and aromatic esters that form a gel when mixed. They have several uses: as adjuncts for tissue healing by protecting irritated tissues before denture fabrication; as temporary obturators over existing dentures; to stabilize denture bases and surgical splints; and to diagnose the effects of resilient denture liners. Tissue conditioners are applied by reducing the denture base, mixing the three components, and molding the material to the denture tissues. They require gentle cleaning to prevent tearing but only provide temporary relief due to loss of plasticizers over 4-8 weeks.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Prosthodontics - realeff relevance in complete dentureKIIT ,BHUBANESWAR
The document discusses the Realeff effect, which refers to the resiliency and compressibility of oral mucosa that complete dentures rest on. It affects all steps of complete denture fabrication from impressions to final insertion. Factors like tissue health, consistency, and age can influence the Realeff effect. Understanding this effect is important for denture stability and preventing trauma to supporting tissues during the denture fabrication process.
Elastomeric impression materials include polysulfide, condensation silicone, addition silicone, and polyether rubbers. They set via polymerization reactions, with setting times of 8-12 minutes on average. Polysulfide and condensation silicone set via condensation reactions producing water or alcohol as byproducts, while addition silicone and polyether set via addition reactions without byproducts. Polysulfide has the highest detail reproduction but all materials exhibit some polymerization shrinkage. Materials are available in light, medium, heavy or putty consistencies for use with stock or custom trays. Proper manipulation is required for accurate impressions.
Tissue conditioners and denture liners are used to improve the fit and comfort of removable dentures. They can be classified based on their curing method, composition, durability, consistency and other properties. Tissue conditioners are temporary soft liners that help condition traumatized tissue, while hard and soft denture liners provide a more permanent resilient layer. Relining or rebasing dentures helps maintain proper fit as ridges resorb over time. Selection of the appropriate liner depends on the clinical situation and needs of the patient.
This document discusses gingival retraction, which is the deflection of marginal gingiva away from a tooth to facilitate impression making of subgingival margins. It defines gingival retraction and describes the biologic width and clinical assessment of gingival biotypes. Various criteria for effective gingival retraction are provided. Methods of gingival retraction include mechanical retraction cords, chemicomechanical agents, and surgical techniques like rotary curettage and electrosurgery. Fluid control during the procedure involves tools like high-volume evacuation, saliva ejectors, and antisialagogues. Gingival retraction allows for visualization and impression of subgingival tooth margins and
brief description about pressable ceramicsCONTENTS: • Introduction • Definition For Dental Ceramics • Definition For Pressable Ceramics • History • Various All Ceramic Systems • Classification • Pressable Ceramics • History • Generation Of Pressable Ceramics • Cerestore – Development Fabrication Advantage Disadvantage 2
3. IPS Empress - Materials And Composition Special Furnace Fabrication Advantage Disadvantage IPS Empress 2- INDICATION Properties Fabrication Method Advantage Disadvantage IPS Emax Press - Microstructure Composition Properties OPC 3G- Development Indication Properties 3
4. INTRODUCTION There have been significant TECHNOLOGICAL advances in the field of dental ceramics over the last 10 years which have made a corresponding increase in the number of materials available. Improvements in strength, clinical performance, and longevity have made all ceramic restorations more popular and more predictable 4
5. DEFINITION FOR DENTAL CERAMICS⁶ An inorganic compound with non metallic properties typically consisting of oxygen and one or more metallic or semi metallic elements (e.g ;Aluminium, Calcium, Lithium, Mangnesium, Potassium, Sodium, Silicon, Tin , Titanium And Zirconium)that is formulated to produce the whole or part of a ceramic based dental prosthesis 5
6. DEFINITION FOR PRESSABLE CERAMICS ⁶ • A ceramic that can be heated to a specified temperature and forced under pressure to fill a cavity in a refractory mold 6
7. HISTORY OF DENTAL CERAMICS ⁶ • 1789-first porcelain tooth material by a French dentist De Chemant • 1774- mineral paste teeth by Duchateau in England • 1808-terrometallic porcelain teeth by Italian dentist Fonzi • 1817- Planteu introduced porcelain teeth in US • 1837- Ash developed improved version of porcelain teeth 7
8. • 1903 – Dr.Charless introduced ceramic crowns in dentistry he fabricate ceramic crown using platinum foil matrix and high fusing feldspathic porcelain excellent esthetics but low flexural strength resulted in failure • 1965- dental aluminous core Porcelain by Mclean and Huges • 1984- Dicor by Adair and Grossman 8
9. 9
10. VARIOUS ALL CERAMIC SYSTEMS Aluminous core ceramics Slip cast ceramics Heat pressed ceramics Machined ceramics Machined and sintered ceramics Metal reinforced system 10
11. MICROSTRUCTURAL CLASSIFICATION⁵ Category 1: Glass-based systems (mainly silica) Category 2: Glass-based systems (mainly silica) with fillers usually crystalline (typically leucite or a different high-fusing glass) a) Low-to-moderate leucite-
Muscles of mastication prosthodontic considerationNeerajaMenon4
The document discusses the muscles involved in mastication and their influence on denture borders. It describes the masseter muscle pushing the buccinator medially, requiring a masseteric groove contour in dentures. The medial pterygoid contracts during closing and influences the retromylohyoid border. Temporalis and lateral pterygoid position the condyles in centric relation, with lateral pterygoid controlling condylar movement during function. Occlusal splints promote muscle relaxation and neuromuscular harmony.
The document provides information on various dental impression materials, including their history, composition, properties and uses. It discusses early materials like beeswax and impression compounds. It also covers alginate, which is the most widely used material due to its ease of use. Other elastic materials discussed include polysulfide, which was the first synthetic elastomer, and condensation silicone. The ideal properties of impression materials and their classifications are also outlined.
This document discusses the disinfection of dental impressions for various impression materials. It defines disinfection and lists common disinfectants used. The main methods of disinfection are immersion and spraying. For each impression material, including alginate, compound, zinc oxide, polysulfide silicone and polyether, the recommended disinfectants and methods are provided. Short exposure times are essential to avoid distortion, especially for hydrocolloids and polyethers. Proper disinfection prevents disease transmission while maintaining dimensional stability.
This document discusses metal-free ceramics used in dentistry. It provides definitions of various types of ceramics like feldspathic porcelain, glass ceramics, and zirconia. The document discusses the history, classification, composition, properties and strengthening techniques of ceramics. It also compares different metal-free ceramic systems and discusses their clinical applications and cementation.
This document discusses articulators, which are mechanical devices that simulate jaw movement. It covers the purposes, uses, requirements, advantages, limitations, and classifications of articulators. Articulators are used to mount dental casts and simulate jaw motions like opening and closing in order to diagnose occlusion, plan treatments, fabricate dental restorations, and arrange artificial teeth. They must accurately maintain the spatial relationship of dental casts and allow for various jaw motions and records. The document classifies articulators based on their function, the theories of occlusion they are based on, the records they can accept, and their degree of adjustability.
The document discusses different types of articulators used in dentistry based on various classification systems. It describes Bonwill's theory of condylar guidance which defines a triangle formed by the condylar contact points and incisal edge. It also outlines Sharry's four class classification of articulators based on their adjustability and ability to accept registrations. Key articulator types mentioned are non-adjustable, semi-adjustable, and fully-adjustable.
Impression materials and recent advances.pptxMuskan Agarwal
The document discusses dental impression materials and recent advances. It defines a dental impression and describes the desirable properties of impression materials including biocompatibility, rheological properties, and mechanical and thermal properties. It covers various types of impression materials including alginate, elastomers like polysulfide, silicone, and polyether materials. Recent advances in alginate, silicone, and polyether impressions are discussed. The document also mentions digital imaging and intraoral scanning.
The document discusses dental impression materials. It defines a dental impression as a negative record of the tissues in the mouth. Impressions are used to reproduce the teeth and surrounding areas to create positive models or casts. There are two main types of impression materials - rigid materials that cannot engage undercuts, and elastic materials that can engage undercuts. Common elastic materials discussed include alginate, polysulfide rubber, silicone, and polyether. The document outlines the characteristics and properties required of good impression materials.
This document discusses different types of impression materials used in dentistry. It begins by defining an impression and cast, and then provides the ideal characteristics of an impression material. It categorizes impression materials based on their setting mechanism, flexibility, amount of pressure on tissues, and type of tray used. Specific materials discussed in detail include impression plaster, impression waxes, impression compound, and zinc oxide eugenol paste. The document outlines the composition, properties, uses, advantages and disadvantages of each.
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professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
This document discusses various materials used in orthodontics, including impression materials, gypsum products, and luting/soldering materials. It provides details on alginate and elastomeric impression materials, describing their composition, properties, advantages/disadvantages, and proper use. It also covers the different types of gypsum products like dental plaster and stone, used for impressions and casts. The document aims to inform dental practitioners about the appropriate selection and manipulation of these materials.
A dental impression is a negative imprint of hard (teeth) and soft tissues in the mouth from which a positive reproduction (cast or model) can be formed. It is made by placing an appropriate material in a stock or custom dental impression tray which is designed to roughly fit over the dental arches. Impression material is of solid or semi-solid nature when first mixed and placed in the mouth. It then sets to become an elastic solid (usually takes a few minutes depending upon the material), leaving an imprint of person's dentition and surrounding structures of the oral cavity
Glass ionomer cements are tooth-colored, fluoride-releasing restorative materials that bond chemically to tooth structure. They were originally developed in 1972 and are called glass ionomer cements because the powder component is a glass and the setting reaction involves an ionic bond. They have favorable properties like fluoride release and recharge, a coefficient of thermal expansion similar to tooth, and bond chemically to enamel and dentin. However, their disadvantages include opacity, poor wear resistance, brittleness, and weak tensile strength. Several modifications have been developed to improve upon their weaknesses.
The document provides information on different types of dental impression materials, including their properties, composition, manipulation, advantages, and disadvantages. It discusses rigid materials like impression compound and zinc oxide eugenol paste. It also covers elastic materials like alginate, agar, polysulfide, addition-cured silicones, and polyether impressions. Alginate is the most commonly used elastic material due to its accuracy, low cost, and ease of use. Impressions are needed for diagnostics, records, treatment planning, and fabrication of restorations, crowns, and dentures. The type of impression material used depends on the clinical needs and area being impressed.
1. The document discusses various types of irreversible impression materials used in dentistry, including their properties and applications.
2. Impression materials are classified based on their setting mechanism (chemical reaction or temperature change) and elasticity (rigid, elastic). They are also classified based on their use (edentulous vs dentulous patients) and ability to displace tissues (mucostatic, mucocompressive).
3. Common irreversible impression materials discussed include zinc oxide eugenol, impression plaster, alginate, polysulfides, condensation silicone, addition silicone, and polyether. The properties, composition, advantages and disadvantages of each material are summarized.
This document discusses various impression materials used in dentistry including impression plaster, impression compound, zinc oxide eugenol impression paste, agar, alginate, and elastomers. Impression plaster is an older material that is no longer commonly used due to poor dimensional stability and detail reproduction. Impression compound is a thermoplastic material that is reusable but records less detail and can distort. Zinc oxide eugenol impression paste sets via a chemical reaction and provides high accuracy and detail reproduction. Agar and alginate are hydrocolloid materials where agar is reversible and alginate is irreversible. Alginate is commonly used for preliminary impressions due to its hydrophilic properties. Elastomers are newer materials that
This document discusses impression materials and techniques used in orthodontics. It begins with an introduction to impression materials and their importance in orthodontics. It then covers the history of impression materials, ideal requisites of materials, and classifications. Specific materials discussed include alginate, agar, and silicones. Impression techniques, trays, and applications for specific clinical situations like cleft palate are also summarized. The document provides an overview of common impression materials and techniques used in orthodontics.
This document provides an introduction and overview of various dental impression materials, including their classification, desirable qualities, and properties. It discusses impression compounds, zinc oxide eugenol paste, reversible hydrocolloids like agar, irreversible hydrocolloids like alginate, and elastic impression materials. For each material, it describes composition, manipulation, advantages, and disadvantages. The document aims to provide an understanding of different impression materials for successful use in clinical dentistry.
Dental impression materials can be classified in several ways, including based on their mode of setting and elasticity, the type of impression and area of use, and how they are used in dentistry. Common rigid materials include impression compound and zinc oxide eugenol paste, while elastic materials include alginate and elastomers. Ideal impression materials have properties like accuracy, dimensional stability, biocompatibility, and easy manipulation and removal from the mouth.
Impression materials are used to take impressions of natural teeth and supporting tissues. They should be non-toxic, elastic, and dimensionally stable after setting. Common impression materials include alginate (irreversible hydrocolloid), elastomers like polysulfide and silicones, zinc oxide eugenol paste, and wax. Each material has advantages and disadvantages for accuracy, ease of use, toxicity, and shelf life. Accurate impressions are important for crowns, bridges, and dentures.
Elastic impression materials like alginate and agar are able to reproduce undercuts accurately due to their elasticity. Alginate is an irreversible hydrocolloid that sets via a chemical reaction between soluble alginate and calcium sulfate. It forms a brush heap gel structure and has adequate strength and accuracy for dental impressions. Agar is a reversible hydrocolloid that transitions between sol and gel states based on temperature. Both require special equipment for manipulation but provide elastic impressions suitable for edentulous and dentulous arches.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
The document discusses dental impression materials. It provides details on the classification, composition, properties, manipulation and applications of various impression materials including alginate, agar, impression compound, zinc oxide eugenol and silicone impressions materials. Impression materials are classified based on their setting mechanism and elasticity into rigid or elastic materials that set via a chemical reaction or temperature change. The document describes the key ingredients, setting reactions, advantages and disadvantages of different impression materials.
The document discusses dental impression materials. It provides details on the classification, composition, properties, manipulation and applications of various impression materials including alginate, agar, impression compound, zinc oxide eugenol and silicone impressions materials. Impression materials are classified based on their setting mechanism and elasticity into rigid or elastic materials that set via a chemical reaction or temperature change. The document outlines the characteristics required of impression materials and provides formulations and setting reactions for several common materials.
This document discusses the properties and chemistry of alginate impression materials. Alginate sets via a chemical reaction between sodium alginate and calcium sulfate to form insoluble calcium alginate. Additives like retarders and fillers are included to control consistency and setting time. Proper control of water:powder ratio, mixing time, and water temperature is needed to achieve optimal gelation time and avoid distortion of the impression. Alginate is a commonly used irreversible hydrocolloid impression material.
This document discusses elastomeric impression materials used in dentistry. It begins by defining elastomers and elastomeric impression materials. The development of various impression materials is described from the 1950s onwards, including the first polysulfide material and the later introduction of polyether and silicone materials. The ideal requisites of impression materials are listed. The document then discusses various types of materials in detail, including polysulfide, polyether, addition silicone, condensation silicone, and light-activated polyether. For each material, its composition, properties, advantages, and disadvantages are outlined. Finally, the document reviews the steps involved in making dental impressions using elastomeric materials.
Similar to recent advances in impression materials (20)
Chapter wise All Notes of First year Basic Civil Engineering.pptxDenish Jangid
Chapter wise All Notes of First year Basic Civil Engineering
Syllabus
Chapter-1
Introduction to objective, scope and outcome the subject
Chapter 2
Introduction: Scope and Specialization of Civil Engineering, Role of civil Engineer in Society, Impact of infrastructural development on economy of country.
Chapter 3
Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
Linear Measurements: Instruments used. Linear Measurement by Tape, Ranging out Survey Lines and overcoming Obstructions; Measurements on sloping ground; Tape corrections, conventional symbols. Angular Measurements: Instruments used; Introduction to Compass Surveying, Bearings and Longitude & Latitude of a Line, Introduction to total station.
Levelling: Instrument used Object of levelling, Methods of levelling in brief, and Contour maps.
Chapter 4
Buildings: Selection of site for Buildings, Layout of Building Plan, Types of buildings, Plinth area, carpet area, floor space index, Introduction to building byelaws, concept of sun light & ventilation. Components of Buildings & their functions, Basic concept of R.C.C., Introduction to types of foundation
Chapter 5
Transportation: Introduction to Transportation Engineering; Traffic and Road Safety: Types and Characteristics of Various Modes of Transportation; Various Road Traffic Signs, Causes of Accidents and Road Safety Measures.
Chapter 6
Environmental Engineering: Environmental Pollution, Environmental Acts and Regulations, Functional Concepts of Ecology, Basics of Species, Biodiversity, Ecosystem, Hydrological Cycle; Chemical Cycles: Carbon, Nitrogen & Phosphorus; Energy Flow in Ecosystems.
Water Pollution: Water Quality standards, Introduction to Treatment & Disposal of Waste Water. Reuse and Saving of Water, Rain Water Harvesting. Solid Waste Management: Classification of Solid Waste, Collection, Transportation and Disposal of Solid. Recycling of Solid Waste: Energy Recovery, Sanitary Landfill, On-Site Sanitation. Air & Noise Pollution: Primary and Secondary air pollutants, Harmful effects of Air Pollution, Control of Air Pollution. . Noise Pollution Harmful Effects of noise pollution, control of noise pollution, Global warming & Climate Change, Ozone depletion, Greenhouse effect
Text Books:
1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
2. Satheesh Gopi, Basic Civil Engineering, Pearson Publishers.
3. Ketki Rangwala Dalal, Essentials of Civil Engineering, Charotar Publishing House.
4. BCP, Surveying volume 1
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Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumMJDuyan
(𝐓𝐋𝐄 𝟏𝟎𝟎) (𝐋𝐞𝐬𝐬𝐨𝐧 𝟏)-𝐏𝐫𝐞𝐥𝐢𝐦𝐬
𝐃𝐢𝐬𝐜𝐮𝐬𝐬 𝐭𝐡𝐞 𝐄𝐏𝐏 𝐂𝐮𝐫𝐫𝐢𝐜𝐮𝐥𝐮𝐦 𝐢𝐧 𝐭𝐡𝐞 𝐏𝐡𝐢𝐥𝐢𝐩𝐩𝐢𝐧𝐞𝐬:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
𝐄𝐱𝐩𝐥𝐚𝐢𝐧 𝐭𝐡𝐞 𝐍𝐚𝐭𝐮𝐫𝐞 𝐚𝐧𝐝 𝐒𝐜𝐨𝐩𝐞 𝐨𝐟 𝐚𝐧 𝐄𝐧𝐭𝐫𝐞𝐩𝐫𝐞𝐧𝐞𝐮𝐫:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
2. RECENT ADVANCES INRECENT ADVANCES IN
IMPRESSION MATERIALSIMPRESSION MATERIALS
A. RAM KOTI REDDY
First year post graduate
Dept of Prosthodontics
3. CONTENTS:
Classification of impression materials.
Desirable properties.
Alginate
● composition
● application
●recent advances
Elastomers
● classification
● recent advances
Digital imaging
advantages
disadvantages
different avaiable systems
4. IMPRESSION MATERIALS :
●Any substances or combination of
substances used for making an impression
or negative reproduction .
DENTAL IMPRESSION:
●An exact negative replica of the teeth
and its associated oral tissues with
accurate reproduction of all finer detail,
maintaining correct spatial dimensions.
5.
6. DESIRABLE QUALITIES OF
IMPRESSION MATERIALS:
Biocompatibility:
●nonirritant,non allergic
●acceptable taste and odour
●should not absorb or dissolve in oral fluid
Rheological properties:
●low viscosity
●viscosity should increase quickly
●pseudoplastic nature
Mechanical properties:
high elasticity and complete elastic
recovery
9. COMPOSITION OF ALGINATE:
Ingredients % by wt. Functions
Sodium or Potassium or
Triethanolamine alginate
15% Dissolve in water
Calcium sulphate ( Reactor ) 16% Reacts with soluble alginates and
form insoluble calcium alginate
Zinc Oxide 4% Act as a filler particle
Potassium Titanium Fluoride 3% Act as accelerator for the setting
of a stone to be poured in
impression to ensure hard, dense
surface of a cast.
Diatomaceous Earth 60% Also act as a filler , provide
strength and stiffness
Sodium Phosphate ( Retarder ) 2% Reacts with calcium sulphate
there by retard the setting of
impression
Coloring and flavouring agent traces For the comfort of patient
10. APPLICATION :
It is used for impression making
- when there are undercuts
- in mouth with excessive flow of saliva
- for partial dentures with clasp
For making a preliminary impression for
complete dentures and treatment dentures.
As a duplicating material.
11. DRAWBACKS WITH ALGINATE:
poor dimensional stability (imbibition or
dessication is a problem).
Low tear strength .
Silica dust in the form diaomaceous earth.
Poor adhesive with tray
12. ADVANCES IN ALGINATE
IMPRESSION :
Extended-pour alginate
Tray adhesive for alginate
High viscosity alginate
Colour changing alginate
Two paste alginate form
Infection free alginate
13. EXTENDED -POUR ALGINATES
Extended pour alginate is designed for use with
alginate impression material which enables to
delay pouring up impression under specified
storage conditions.
MILLENIUM ALGIN is considered an alginate of
new generation alginate.
14. MILLENIUM :
• Class A type 1 alginate
• Tixotropic
• Extra-fast in-mouth minimum setting time 30 sec
• High accuracy: 15 micron
• Long dimensional stability (168 hours)
• Dust free
• 5 years of expiry date
15. manufactured by LASCOD(Italy)
STORING:
The impression must be stored in a sealed plastic
bag (Safe-Lock Bags by Lascod) without adding
anything else. Do not leave the impression in open
air or immersed in water.
MILLENIUM working time can be extended when
required with Personal Krono liquid.
The liquid does not change
MILLENIUM physical properties
17. TRAY ADHESIVE FOR ALGINATE
liquid and spray containing polymide or
diethylenetriamine polymer, ester gum and rosin in
isopropyl alcohol or a combination of isopropyl alcohol
with ethyl acetate has been introduced.
18. ACCUDENT XD TRAY ADHESIVE:
new AccuDent XD Impression System creates
impressions with dimensional accuracy and
freedom from air bubbles and voids making it
possible to create visibly better primary stone or
virtual models.
19. DUST FREE ALGINATE:
Sepiolite ,a natural mineral fiber containing
magnesium silicate about 20microns was added
to alginate as a substitute when added traps
the alginate partiles thus reducing dust
generation
20. COLOUR CHANGING ALGINATE:
A combination of inorganic and organic(cresol red ,
naptholpthalein) along pH indicator has been
incorparated .
In such cases,the intial color of the alginate soon after
mixing is a combination of pigment and Ph indicator where
as the color of alginate after setting is the color due to
pigment alone
21. TWO FORM PASTE ALGINATE:
quite convenient to mix.
Base paste contains a mix of soluble alginate,
water and fillers.
The reactor or catalyst paste contains calcium salt
mixed with a viscous liquid that is non reactive
towards calcium salt such as liquid paraffin.
A pH stabilizing agent such
as magnesium hydroxide
is also added.
22. INFECTION FREE ALGINATE :
quaternary ammonium compounds,
bisquanidine compounds, chlorhexidine,
didecyldimethyl ammonium chloride without
altering its properties.
25. Advantages of elastomeric impression
materials over the hydrocolloid
higher tear strength
dimensionally stable on storage.
Most of elastomers can be electroplated
26. ELASTOMERS:
Elastomers are of 3 types
1) POLYSULPHIDE
2) SILICONES
a) Addition Silicones
b) Condensation Silicones.
3) POLYETHERS
a) Light activated polyethers
b) Chemically activated polyethers.
28. PROPERTIES OF POLYSULFIDE
1.Available in variety of viscosities (Light, Regular,
Heavy, Putty)
2) Working time = 3-6 min
3) Setting time = 10-20 min.
4) Highly flexible of all the elastomers.
5) Elastic recovery improves with time .
6) High tear strength.
7) Not dimensionally stable
Cast should be poured immediately.
USED TO RECORD IMPRESSIONS FOR CROWNS,
BRIDGES, INLAYS, ONLAYS AND PARTIAL
DENTURES
29. ADVANTAGES:ADVANTAGES:
Good wettability
Good surface detail
High tear strength
Long working time
●DISADVANTAGES:
●High permanent deformation
●Staining of clothes
●unpleasant rubbery smell
●Can only be used in a special tray
●Must pour within 1 hour
30. COE-FLEX REGULAR BODY LEAD-
FREE POLYSULFIDE IMPRESSION
MATERIAL
lead-free, all-purpose rubber base impression
material for inlays, crowns, bridges, full and
partial dentures, rebasing and relining.
Other commerical brands:
Permlastic (Lead dioxide system)
Omniflex (Copper hydroxide system)
31. CONDENSATION SILICONE IMPRESSION
MATERIAL
Alternate names:
1) Conventional silicones.
2) Room temperature vulcanizing (RTV) silicones.
USED TO RECORD IMPRESSIONS FOR CROWNS,
BRIDGES, INLAYS, ONLAYS AND COMPLETE
DENTURES
33. SETTING REACTION
exthothermic .
Cross-linking occurs between the siloxane polymer and the
alkyl silicate in the presence of the activator with the
release of ethyl alcohol as reaction by-product.
dimensional changes→evapariation of
alcohol+polymeriazation shrinkage
Alcohol could cause air bubbles in the stone cast.
Electroplated
34. PROPERTIES OF CONDENSATION SILICONE
1)Available in all 4 consistencies
2) Flow after 1 hour = 0.09%
3) Mixing time = 1 min
4) Working time =3 min
5) Setting time = 6-10 min
6) Good tear strength.
7) Flexibility is less than Polysulphides.
8)Dimensionally not stable:
Due to
a) Polymerization shrinkage.
b) Incomplete elastic recovery.
c) Thermal contraction on removal from
mouth to room temperature.
35. Advantages
1)Adequate working time & setting time.
2) Clean & pleasant odour.
3) No staining.
4) Adequate tear strength.
5) Better elastic properties.
6) Can be electroplated with silver and copper
disadvantages
1) Lower flexibility than polysulphides
2) Poor dimensional stability due to release of by
products.
3) Less accuracy if poured immediately
4) Hydrophobic nature
5) Poor to adequate shelf life (1- 2 years)
6) Slightly expansive.
37. ADDITION SILICONE IMPRESSION MATERIAL
Have much better properties than Condensation
silicones.
Alternate names:
1) Poly vinyl siloxane.
2) Vinyl poly siloxane.
Used to record impression FOR CROWNS, BRIDGES,
INLAYS,ONLAYS, PARTIAL AND
COMPLETE DENTURES
40. PROPERTIES OF ADDITION SILICONE
1)Available in all 4 consistencies.
2)Various consistencies serve different purpose
E.g. Putty or heavy body is used for primary
impressions.
Regular or light body is used for secondary
impressions.
3) Excellent elastic recovery of 99.93%
4)Tear strength of 3500 gm/cm
5) Mixing time is 35-45 sec
6)Working time = 2-3 min.
7) Setting time = 6-8 min.
41. ADVANTAGES:
Records highly accurate impression.
Pleasant to handle.
Shorter setting time.
Excellent elastic recovery.
No elimination of any by products.
Dimensionally stable.
Can be electroplated with silver & copper.
Multiple die pour is possible.
DISADVANTAGES
More expansive with automatic mixing device.
Shorter working time.
May release H2 gas on setting.
Hydrophobic material.
●Latex glove interfer setting reaction.
● Vinyl and nitrile gloves can be used
43. VINYLSILOXANETHER - IDENTIUM
extremely hydrophilic, highly flowable, provides
excellent resilience.
An accurate impressions in the narrowest crevices and
high definition even in the moist sulcus.
the advantages of polyether materials coupled with
those of A-silicones
Avaiable in
●medium viscosicty
●heavy viscosity
● light viscosity
44. EXAFLEX
VPS IMPRESSION MATERIAL:
EXAFLEX Vinyl Polysiloxane (VPS) impression
materials produce crisp, extraordinarily smooth and
precise impressions for models, crowns, bridges and
dentures.
Hydrophilic
Immediate pour
High tear strength
Accurate impressions
45. FUTAR:
the convenient classic: hard A-silicone with
convenient working time, accurate results and the
utmost comfort.
extra hard bite registration material ,easy to trim also
with a scalpel
46.
47. POLYETHER IMPRESSION MATERIAL
Commercial names are
Impregum, Remitec, Polyjel , Permadyne etc.
Polyether is available in
3 viscosities (Light, Regular and heavy body)
49. PROPERTIES OF POLY ETHER :
Can cause irritation due to presence of aromatic
sulphonic acid catalyst in reactor paste.
Elastic recovery =98.9%
Permanent deformation is 1.1%
Flexibility is low 2%
Mixing time is 45 sec to 1 minute.
Working time = 2 minutes.
Setting time is 3-5 minutes.
Good dimensional stability due to
a) Addition polymerization reaction.
b) Less polymerization shrinkage
50. ADVANTAGES
• Accurate and fine details
• Good dimensional stability during setting
• Good elastic recovery of 98.9%
• Compatible with cast & die materials
• Pour within one week (if kept dry)
• Good wettability (hydrophilic)
51. DISADVANTAGES
• Stiff (difficult removal from the mouth)
• Expensive
• Short setting time (3-5 min)
• Bitter taste
• Absorbs water and changes dimension
52. Polyether is hydrophilic and can absorb water in
wet condition (swelling), accordingly
→ Can not be electroplated
→ should be stored in dry environment to
preserve its dimensional accuracy .
53. LIGHT ACTIVATED POLY ETHER
IMPRESSION MATERIAL
Available in 2 viscosities.
● Light body supplied in syringes.
● Heavy body supplied as tubes
COMPOSITION OF LIGHT ACTIVATED POLYETHER
54. PROPERTIES OF LIGHT ACTIVATED POLY
ETHER
Excellent elasticity.
It has operator control over the polymerization.
Infinite working time.
Short setting time.
Low volume shrinkage on setting.
Impression can be stored upto 2 weeks
55. IMPREGUM PENTA SOFT QUICK STEP
HEAVY BODY/LIGHT BODY POLYETHER
IMPRESSION MATERIAL FROM 3M
Pentamix Mixing Unit Cartridge Dispenser
Working time 1min
Setting time 3min
56. POLYJEL NF POLYETHER IMPRESSION
MATERIAL:
Hydrophilic material with excellent memory that will
not distort
• Optimally colored for easy to read detail
• Can delay pour for up to 2 weeks
• Adequate work time with fast set
57. AFFINITY MONOPHASE POLYETHER:
It is ideal for implant impressions, edentulous, and
partial impressions, as well as for the fabrication of
clear aligners in orthodontic treatment.
Enhanced hydrophilicity for excellent performance in
the presence of moisture, especially with subgingival
preparations.
100% cure, which translates to high tear strength and
dimensional stability.
58. DIGITAL IMAGING:
Most of modern dentistry is already immersed in digital
dentistry
Computer-aided design (CAD)/computer-aided
manufacturing (CAM) technologies are advancing
rapidly.
59. ADVANTAGES OF INTRAORAL
SCANNING:
1. Real-time visualization and evaluation
2. Easy to correct, manipulate, or recapture
images
3. Segmental image capture
4. Archival digitally, therefore no need to store
physical casts
5. No wastage of impression material and
therefore environmentally friendly
6. Economical, considering no use of impression
trays, adhesives, or gypsum
7. Do not need to disinfect before sending
information to the laboratory
60. 8. No damage or wear and tear of the stone casts
9. Swift communication with the laboratory via the
Internet
10. Self-assessment for tooth preparations
11.Increased patient satisfaction
12. Some systems have color scanning, shade
selection, and still photograph image-taking
61. DISADVANTAGES OG INTRAORAL
SCANING:
1. Initial cost of equipment and software maintenance
fees
2. Learning curve can be difficult for some individuals
3. Scan bodies needed for implant systems that are
compatible with the design software
4. Difficult to capture occlusion information for
complex prosthodontics treatment.
5. Cannot capture subgingival margins if obscured
with blood, saliva, or tissue.
6. Unable to accurately capture images of the
edentulous arches
7. Scanning patterns need to be followed as per
manufacturer’s recommendations
62. THE FOLLOWING ARE MOST COMMONLY
USED SYSTEM:
1●TRIOS 3:(3 shape)
An innovative wireless intraoral scanner
Easy battery exchange for non-stop scanning
Long-lasting rechargeable batteries
Realistic colors
63. CEREC (SIRONA):
This device is a closed system in that the software is
only compatible with the company”s milling unit and
the image files cannot be exported and used with other
milling system.
65. REFERENCES:
Anusavice,shen,rawls, Arvind shenoy, Phillip’s science
of dental materials. 1st
edition.
Applied dental materials ,john F. Mc Cabe&Angus
W.G.Walls,8th
edition
Dental impression materials and techniques by Amit
punj et al
alginate impression material:From then till now by
Dr.Gurleen kaur et al.