The document summarizes important anatomical landmarks of the maxilla relevant for denture construction. It describes the layers of the mucous membrane, limiting and supporting structures, and relief areas of the palate. Key landmarks include the hard palate, residual ridges, rugae, and tuberosities as primary support areas, and the incisive papilla, fovea palatina, and midpalatine raphe as relief areas. The document also outlines the muscles of the palate and classifications of the palatal vault and posterior palatal seal.
This document discusses the anatomical landmarks of the maxilla that are important to consider when fabricating a removable denture. It outlines the limiting structures like the labial and buccal frenums and vestibules. The supporting structures that provide areas of support are described as the hard palate, posterior slopes of the residual ridge, and maxillary tuberosity. Relief areas like the incisive papilla are also indicated that should be relieved in the denture to avoid pressure on delicate tissues. Understanding these anatomical structures is key to designing a retentive and comfortable maxillary denture.
Impression compounds are thermoplastic materials used for dental impressions. They are composed mainly of rosin, copal resin, carnauba wax, stearic acid, and talc. There are two main types - lower fusing impression compound and higher fusing tray compound. Impression compound is a viscous material that is softened in hot water before making impressions, allowing it to flow and capture detail but also maintain shape. While able to displace soft tissue, its high viscosity limits fine detail capture. Impression compound requires careful heating and cooling to avoid distortion, and constructs must be poured promptly due to its marginal dimensional stability.
This document provides an overview of anatomical landmarks in the maxilla that are important for complete denture construction. It discusses intraoral landmarks like the labial and buccal frenums, as well as maxillary arch structures like the residual alveolar ridge, hard palate, palatal rugae, incisive papilla, hamular notch, maxillary tuberosity, and fovea palatinae that serve as stress bearing or relief areas. The document emphasizes understanding the histology and functions of these structures to ensure dentures are designed and placed to avoid placing undue pressure on supporting tissues.
The anatomy of the edentulous ridge in the maxilla and mandible is very important for the design of a complete denture. Objective in fabrication of a complete denture is to provide a prosthesis that restores lost teeth and associated structures functionally, anatomically and aesthetically as much as possible with preservation of underlying structures and the knowledge landmarks help us in achieving our objective.
ANATOMICAL LANDMARKS OF EDENTULOUS MAXILLAAamir Godil
This document discusses the anatomical landmarks of the maxilla that are important for complete denture construction. It defines stress bearing areas, relief areas, and limiting areas. Stress bearing areas include the postero-lateral slopes of the hard palate, residual alveolar ridge, rugae, and maxillary tuberosity. Relief areas are the incisive papilla, mid-palatine raphae, zygomatic process, sharp spiny spicules, torus palatinus, and cuspid eminence. Limiting areas are the labial frenum, labial vestibule, buccal frenum, buccal vestibule, anterior and posterior vibrating lines,
This document discusses important anatomical landmarks for complete dentures in the maxilla and mandible. It describes 14 maxillary landmarks including the labial and buccal frenums, vestibules, alveolar ridge, tuberosity, hamular notch, hard palate features, and rugae. It also describes 9 mandibular landmarks like the labial and lingual frenums and vestibules, buccal shelf area, retromolar pad, and pear shaped pad. Understanding these landmarks is essential for proper denture fit and function as well as preservation of underlying tissues.
This document discusses the anatomical landmarks of the maxilla that are important to consider when fabricating a removable denture. It outlines the limiting structures like the labial and buccal frenums and vestibules. The supporting structures that provide areas of support are described as the hard palate, posterior slopes of the residual ridge, and maxillary tuberosity. Relief areas like the incisive papilla are also indicated that should be relieved in the denture to avoid pressure on delicate tissues. Understanding these anatomical structures is key to designing a retentive and comfortable maxillary denture.
Impression compounds are thermoplastic materials used for dental impressions. They are composed mainly of rosin, copal resin, carnauba wax, stearic acid, and talc. There are two main types - lower fusing impression compound and higher fusing tray compound. Impression compound is a viscous material that is softened in hot water before making impressions, allowing it to flow and capture detail but also maintain shape. While able to displace soft tissue, its high viscosity limits fine detail capture. Impression compound requires careful heating and cooling to avoid distortion, and constructs must be poured promptly due to its marginal dimensional stability.
This document provides an overview of anatomical landmarks in the maxilla that are important for complete denture construction. It discusses intraoral landmarks like the labial and buccal frenums, as well as maxillary arch structures like the residual alveolar ridge, hard palate, palatal rugae, incisive papilla, hamular notch, maxillary tuberosity, and fovea palatinae that serve as stress bearing or relief areas. The document emphasizes understanding the histology and functions of these structures to ensure dentures are designed and placed to avoid placing undue pressure on supporting tissues.
The anatomy of the edentulous ridge in the maxilla and mandible is very important for the design of a complete denture. Objective in fabrication of a complete denture is to provide a prosthesis that restores lost teeth and associated structures functionally, anatomically and aesthetically as much as possible with preservation of underlying structures and the knowledge landmarks help us in achieving our objective.
ANATOMICAL LANDMARKS OF EDENTULOUS MAXILLAAamir Godil
This document discusses the anatomical landmarks of the maxilla that are important for complete denture construction. It defines stress bearing areas, relief areas, and limiting areas. Stress bearing areas include the postero-lateral slopes of the hard palate, residual alveolar ridge, rugae, and maxillary tuberosity. Relief areas are the incisive papilla, mid-palatine raphae, zygomatic process, sharp spiny spicules, torus palatinus, and cuspid eminence. Limiting areas are the labial frenum, labial vestibule, buccal frenum, buccal vestibule, anterior and posterior vibrating lines,
This document discusses important anatomical landmarks for complete dentures in the maxilla and mandible. It describes 14 maxillary landmarks including the labial and buccal frenums, vestibules, alveolar ridge, tuberosity, hamular notch, hard palate features, and rugae. It also describes 9 mandibular landmarks like the labial and lingual frenums and vestibules, buccal shelf area, retromolar pad, and pear shaped pad. Understanding these landmarks is essential for proper denture fit and function as well as preservation of underlying tissues.
The document discusses the process of making record bases and occlusion rims, including defining them, listing materials used, and explaining the techniques for constructing autopolymerizing acrylic resin record bases and making occlusion rims out of baseplate wax to establish jaw relations and arrange teeth for denture fabrication. Record bases provide support for occlusion rims and are made using various materials like shellac, acrylic resin, or metal, while occlusion rims made of baseplate wax are used to arrange teeth and make jaw relation records.
The document discusses the use of spacer wax in dental impressions. It describes the objectives of using spacer wax as providing relief to tissue and controlling the thickness of impression material. Spacer wax thickness can vary according to tissue attachment and load bearing capacity. The document also discusses different spacer wax designs, classifications, and guidelines for using spacer wax and tissue stops in selective pressure impression techniques.
This document discusses the anatomical landmarks that limit the periphery of maxillary dentures, including the labial frenum, labial vestibule, buccal frenum, buccal vestibule, pterygomaxillary notch, and vibrating line of the palate. Each structure is defined along with considerations for how it impacts the design of dentures, such as ensuring frenums can pass through notches and ensuring flanges do not extend beyond vestibules or risk interfering with other structures like the coronoid process. The vibrating line of the palate specifically marks where hard and soft palates meet and is used to determine the posterior border of dentures.
- Record bases help transfer accurate jaw relationships to an articulator to enable setting artificial teeth for a trial denture. They can be temporary or permanent.
- Temporary record bases include shellac, reinforced shellac, cold cure acrylic, and vacuum formed bases. Permanent bases are not discarded and become part of the final denture base, like heat cure acrylic, gold, or cobalt-chromium alloys.
- Occlusion rims are built on record bases to make jaw relation records and arrange teeth. They must be in the anticipated tooth position, securely attached to the base, and have a smooth, flat occlusal surface that supports lips and cheeks.
A temporary denture base is used to support artificial teeth during procedures like determining jaw relations and tooth arrangement. It aims to resemble the final denture. Common materials used are auto-polymerizing resins, heat cure resin, thermoplastics, and shellac. Self-cure acrylic resin is a popular option that can be manipulated using techniques like the sprinkle technique, finger-adapted dough technique, or stone mould dough technique to adapt to the cast. The temporary denture base should adequately support teeth, adapt to tissues, and be stable, rigid, and non-reactive in the mouth.
This document discusses different types of compensating curves used in dental prosthetics to establish balanced articulation during jaw movements. It describes the anteroposterior and mediolateral compensating curves that begin with the first replacement tooth and continue through the second molar. It also outlines the curve of spee from the mandibular canine through the condyle, the curve of Wilson to arrange the lower molars, and the curve of Monson connecting the curve of spee and Wilson to all cusps on a 4 inch radius.
This document discusses important intraoral anatomical landmarks for complete dentures. It describes the limiting structures, supporting structures, and relief areas for both maxillary and mandibular dentures. For the maxilla, key landmarks include the labial and buccal frenums and vestibules, hamular notch, hard palate, tuberosity, and rugae. For the mandible, landmarks are the labial, buccal, and lingual frenums and vestibules, retromolar pad, external oblique ridge, buccal shelf, and mental foramen. Understanding these structures aids in fabricating dentures that are retained, stable, and support the surrounding tissues.
This document outlines the clinical and laboratory steps involved in fabricating complete dentures. It begins with an introduction and then describes each step in detail, including: primary and secondary impressions, making a special tray, the master cast, bite rim, jaw relations, mounting on an articulator, try in, denture processing through compression molding, and finishing and polishing. The overall process involves close collaboration between the clinician and dental technician to create functional and aesthetic complete dentures for edentulous patients.
Anatomical landmarks of maxilla and mandible [autosaved]Pooja Langote
The document discusses anatomical landmarks that are important reference points for complete dentures. It defines landmarks as recognizable anatomic structures used for reference points. The key landmarks are categorized as limiting structures, supporting structures, and relief areas. Limiting structures determine the denture border and extension. Supporting structures tolerate masticatory forces. Relief areas are fragile or prone to resorption under load. For both maxilla and mandible, the document outlines the specific anatomical structures that serve as landmarks in each category and their clinical significance for supporting and extending complete dentures.
This document discusses the anatomical landmarks of the mandibular denture bearing area. It identifies the limiting structures that determine the extent of dentures, such as the labial and buccal frenums and vestibules. The supporting structures are the primary load bearing areas and include the buccal shelf area and residual alveolar ridge. Relief areas like the mylohyoid ridge and mental foramen should be relieved in dentures due to fragile tissue or risk of trauma under constant load. The average available denture bearing area in the mandible is 14cm2, significantly less than the maxilla's 24cm2, making the mandible less capable of resisting occlusal forces.
The document discusses various die materials and systems used for indirect restorations. It defines a die as a positive reproduction of a prepared tooth used to fabricate restorations outside the mouth. Common die materials include gypsum, resins, metals and polymers, each with advantages and disadvantages. Removable die systems like dowel pins, Di-Lok and Pindex are discussed which allow repositioning of dies in the working cast for wax pattern fabrication. Proper selection of die material and system depends on factors like accuracy, strength and compatibility with impression materials.
A number of theories have been put forward for impressions. each having its own advantage and disadvantage.
Different spacers guide and aid in in making the desired impression with adequate pressure in the desired region of the arch in maxilla and mandible. different materials are used for spacers depending on the need.
The document discusses the process of making custom trays and master casts for complete dentures, including taking final impressions, border molding, and boxing and pouring the impressions to create the definitive master casts. Key steps include fabricating a custom tray, border molding with low-fusing compound or impression material, taking final impressions with materials like zinc oxide eugenol or elastomers, and boxing and pouring the impressions in dental stone to create the finished master casts.
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.
This document discusses the posterior palatal seal area for maxillary dentures. It defines the posterior palatal seal and describes the relevant anatomy, including the soft palate, muscles of the soft palate, and structures related to the posterior palatal seal such as the hamular process. It also discusses classifications of the soft palate and palatal forms, the functions of the posterior palatal seal, and guidelines for its placement based on a review of literature.
The document discusses impression trays, which are used to carry and control impression material in the mouth. It describes different types of trays, including stock trays, custom trays, and special trays. Special trays are custom-made for each patient based on a preliminary cast and are used to make final impressions. The document outlines the procedure for fabricating a special tray using materials like shellac, acrylic resin, and wax spacers. Special trays provide accurate impressions and are more comfortable for patients compared to stock trays.
Anatomy and clinical significance of denture bearing areasOgundiran Temidayo
A presentation on the anatomy and clinical significance of the denture bearing areas by Ogundiran Temidayo who is a dental student at OBAFEMI AWOLOWO UNIVERSITY ILE-IFE
This document discusses procedures for boxing master impressions and making master casts. It describes two methods for boxing maxillary impressions using either pumice and plaster or wax rods and strips. For mandibular impressions, a layer of adhesive or wax is applied to the impression border before adding a wax land and boxing wax enclosure. Master casts are poured in stone, trimmed with a 4-6mm peripheral roll and notches added for remounting. Landmarks like the incisive papilla and retromolar pad midpoint are marked on casts.
The document discusses the posterior palatal seal, which provides retention for complete dentures through light pressure on the junction of the hard and soft palates. It describes the anatomy and functions of the posterior palatal seal, techniques for recording it such as the conventional and fluid wax methods, and troubleshooting issues like under or over extension. The posterior palatal seal is important for retaining dentures and reducing discomfort.
The document provides an overview of elastomeric impression materials. It begins with an introduction and definitions of key terms like elastomer and elastomeric impression materials. It then discusses the history and classifications of impression materials. The document outlines the ideal requirements for impression materials and their clinical applications. It describes the properties and composition of various elastomers like polysulfide, condensation silicone, addition silicone, and polyether. It discusses recent advances in impression materials and effects of mishandling impressions. In conclusion, the document provides a comprehensive review of elastomeric impression materials.
ANATOMICAL LANDMARKS OF EDENTULOUS MOUTH IN COMPLETE DENTURE.pptxnehasrivastava643617
This document discusses the anatomical landmarks of the edentulous maxilla that are important for complete denture prosthodontics. It divides the maxilla into three parts: limiting structures, supporting structures, and relief areas. The limiting structures determine the extent of the denture and include the labial and buccal frenums and vestibules, hamular notch, and posterior palatal seal area. The supporting structures that bear loads are the horizontal portion of the hard palate and slopes of the residual alveolar ridge. Relief must be provided in relief areas like the incisive papilla, mid-palatal raphe, and fovea palatinae to avoid pain. Proper identification of these landmarks is
This document discusses important anatomical landmarks in the maxilla that are relevant for complete denture fabrication. It describes primary and secondary stress bearing areas like the hard palate, posterior alveolar ridge, and palatine rugae which provide support. Limiting structures like the labial and buccal frenums that impact border molding are also outlined. Relief areas like the incisive papilla and fovea palatini are indicated to prevent irritation. Understanding these landmarks allows dentists to properly assess forces on the denture base and design borders that function harmoniously with surrounding tissues.
The document discusses the process of making record bases and occlusion rims, including defining them, listing materials used, and explaining the techniques for constructing autopolymerizing acrylic resin record bases and making occlusion rims out of baseplate wax to establish jaw relations and arrange teeth for denture fabrication. Record bases provide support for occlusion rims and are made using various materials like shellac, acrylic resin, or metal, while occlusion rims made of baseplate wax are used to arrange teeth and make jaw relation records.
The document discusses the use of spacer wax in dental impressions. It describes the objectives of using spacer wax as providing relief to tissue and controlling the thickness of impression material. Spacer wax thickness can vary according to tissue attachment and load bearing capacity. The document also discusses different spacer wax designs, classifications, and guidelines for using spacer wax and tissue stops in selective pressure impression techniques.
This document discusses the anatomical landmarks that limit the periphery of maxillary dentures, including the labial frenum, labial vestibule, buccal frenum, buccal vestibule, pterygomaxillary notch, and vibrating line of the palate. Each structure is defined along with considerations for how it impacts the design of dentures, such as ensuring frenums can pass through notches and ensuring flanges do not extend beyond vestibules or risk interfering with other structures like the coronoid process. The vibrating line of the palate specifically marks where hard and soft palates meet and is used to determine the posterior border of dentures.
- Record bases help transfer accurate jaw relationships to an articulator to enable setting artificial teeth for a trial denture. They can be temporary or permanent.
- Temporary record bases include shellac, reinforced shellac, cold cure acrylic, and vacuum formed bases. Permanent bases are not discarded and become part of the final denture base, like heat cure acrylic, gold, or cobalt-chromium alloys.
- Occlusion rims are built on record bases to make jaw relation records and arrange teeth. They must be in the anticipated tooth position, securely attached to the base, and have a smooth, flat occlusal surface that supports lips and cheeks.
A temporary denture base is used to support artificial teeth during procedures like determining jaw relations and tooth arrangement. It aims to resemble the final denture. Common materials used are auto-polymerizing resins, heat cure resin, thermoplastics, and shellac. Self-cure acrylic resin is a popular option that can be manipulated using techniques like the sprinkle technique, finger-adapted dough technique, or stone mould dough technique to adapt to the cast. The temporary denture base should adequately support teeth, adapt to tissues, and be stable, rigid, and non-reactive in the mouth.
This document discusses different types of compensating curves used in dental prosthetics to establish balanced articulation during jaw movements. It describes the anteroposterior and mediolateral compensating curves that begin with the first replacement tooth and continue through the second molar. It also outlines the curve of spee from the mandibular canine through the condyle, the curve of Wilson to arrange the lower molars, and the curve of Monson connecting the curve of spee and Wilson to all cusps on a 4 inch radius.
This document discusses important intraoral anatomical landmarks for complete dentures. It describes the limiting structures, supporting structures, and relief areas for both maxillary and mandibular dentures. For the maxilla, key landmarks include the labial and buccal frenums and vestibules, hamular notch, hard palate, tuberosity, and rugae. For the mandible, landmarks are the labial, buccal, and lingual frenums and vestibules, retromolar pad, external oblique ridge, buccal shelf, and mental foramen. Understanding these structures aids in fabricating dentures that are retained, stable, and support the surrounding tissues.
This document outlines the clinical and laboratory steps involved in fabricating complete dentures. It begins with an introduction and then describes each step in detail, including: primary and secondary impressions, making a special tray, the master cast, bite rim, jaw relations, mounting on an articulator, try in, denture processing through compression molding, and finishing and polishing. The overall process involves close collaboration between the clinician and dental technician to create functional and aesthetic complete dentures for edentulous patients.
Anatomical landmarks of maxilla and mandible [autosaved]Pooja Langote
The document discusses anatomical landmarks that are important reference points for complete dentures. It defines landmarks as recognizable anatomic structures used for reference points. The key landmarks are categorized as limiting structures, supporting structures, and relief areas. Limiting structures determine the denture border and extension. Supporting structures tolerate masticatory forces. Relief areas are fragile or prone to resorption under load. For both maxilla and mandible, the document outlines the specific anatomical structures that serve as landmarks in each category and their clinical significance for supporting and extending complete dentures.
This document discusses the anatomical landmarks of the mandibular denture bearing area. It identifies the limiting structures that determine the extent of dentures, such as the labial and buccal frenums and vestibules. The supporting structures are the primary load bearing areas and include the buccal shelf area and residual alveolar ridge. Relief areas like the mylohyoid ridge and mental foramen should be relieved in dentures due to fragile tissue or risk of trauma under constant load. The average available denture bearing area in the mandible is 14cm2, significantly less than the maxilla's 24cm2, making the mandible less capable of resisting occlusal forces.
The document discusses various die materials and systems used for indirect restorations. It defines a die as a positive reproduction of a prepared tooth used to fabricate restorations outside the mouth. Common die materials include gypsum, resins, metals and polymers, each with advantages and disadvantages. Removable die systems like dowel pins, Di-Lok and Pindex are discussed which allow repositioning of dies in the working cast for wax pattern fabrication. Proper selection of die material and system depends on factors like accuracy, strength and compatibility with impression materials.
A number of theories have been put forward for impressions. each having its own advantage and disadvantage.
Different spacers guide and aid in in making the desired impression with adequate pressure in the desired region of the arch in maxilla and mandible. different materials are used for spacers depending on the need.
The document discusses the process of making custom trays and master casts for complete dentures, including taking final impressions, border molding, and boxing and pouring the impressions to create the definitive master casts. Key steps include fabricating a custom tray, border molding with low-fusing compound or impression material, taking final impressions with materials like zinc oxide eugenol or elastomers, and boxing and pouring the impressions in dental stone to create the finished master casts.
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.
This document discusses the posterior palatal seal area for maxillary dentures. It defines the posterior palatal seal and describes the relevant anatomy, including the soft palate, muscles of the soft palate, and structures related to the posterior palatal seal such as the hamular process. It also discusses classifications of the soft palate and palatal forms, the functions of the posterior palatal seal, and guidelines for its placement based on a review of literature.
The document discusses impression trays, which are used to carry and control impression material in the mouth. It describes different types of trays, including stock trays, custom trays, and special trays. Special trays are custom-made for each patient based on a preliminary cast and are used to make final impressions. The document outlines the procedure for fabricating a special tray using materials like shellac, acrylic resin, and wax spacers. Special trays provide accurate impressions and are more comfortable for patients compared to stock trays.
Anatomy and clinical significance of denture bearing areasOgundiran Temidayo
A presentation on the anatomy and clinical significance of the denture bearing areas by Ogundiran Temidayo who is a dental student at OBAFEMI AWOLOWO UNIVERSITY ILE-IFE
This document discusses procedures for boxing master impressions and making master casts. It describes two methods for boxing maxillary impressions using either pumice and plaster or wax rods and strips. For mandibular impressions, a layer of adhesive or wax is applied to the impression border before adding a wax land and boxing wax enclosure. Master casts are poured in stone, trimmed with a 4-6mm peripheral roll and notches added for remounting. Landmarks like the incisive papilla and retromolar pad midpoint are marked on casts.
The document discusses the posterior palatal seal, which provides retention for complete dentures through light pressure on the junction of the hard and soft palates. It describes the anatomy and functions of the posterior palatal seal, techniques for recording it such as the conventional and fluid wax methods, and troubleshooting issues like under or over extension. The posterior palatal seal is important for retaining dentures and reducing discomfort.
The document provides an overview of elastomeric impression materials. It begins with an introduction and definitions of key terms like elastomer and elastomeric impression materials. It then discusses the history and classifications of impression materials. The document outlines the ideal requirements for impression materials and their clinical applications. It describes the properties and composition of various elastomers like polysulfide, condensation silicone, addition silicone, and polyether. It discusses recent advances in impression materials and effects of mishandling impressions. In conclusion, the document provides a comprehensive review of elastomeric impression materials.
ANATOMICAL LANDMARKS OF EDENTULOUS MOUTH IN COMPLETE DENTURE.pptxnehasrivastava643617
This document discusses the anatomical landmarks of the edentulous maxilla that are important for complete denture prosthodontics. It divides the maxilla into three parts: limiting structures, supporting structures, and relief areas. The limiting structures determine the extent of the denture and include the labial and buccal frenums and vestibules, hamular notch, and posterior palatal seal area. The supporting structures that bear loads are the horizontal portion of the hard palate and slopes of the residual alveolar ridge. Relief must be provided in relief areas like the incisive papilla, mid-palatal raphe, and fovea palatinae to avoid pain. Proper identification of these landmarks is
This document discusses important anatomical landmarks in the maxilla that are relevant for complete denture fabrication. It describes primary and secondary stress bearing areas like the hard palate, posterior alveolar ridge, and palatine rugae which provide support. Limiting structures like the labial and buccal frenums that impact border molding are also outlined. Relief areas like the incisive papilla and fovea palatini are indicated to prevent irritation. Understanding these landmarks allows dentists to properly assess forces on the denture base and design borders that function harmoniously with surrounding tissues.
ANATOMICAL LANDMARKS OF MAXILLA AND MANDIBLE.pptxKavin73
anatomical landmarks of maxilla and mandibular arch which is useful to bds students especially the first year students in prosthodontic department ,
in this slide we explain completely about the anatomical structure of the maxilla and mandible
This document discusses the anatomical landmarks in the mandible that are important for denture construction. It describes the limiting structures like frenums and vestibules that define the borders for a mandibular denture. The supporting structures that provide stability, like the buccal shelf area and residual alveolar ridge, are also outlined. Finally, it identifies relief areas over bony prominences on the mandible, such as the mylohyoid ridge and mental foramen, that require relief in the denture base to avoid pressure and pain.
This document discusses the posterior palatal seal, including its definition, function, anatomical considerations, techniques for recording it, and potential errors. The key points are:
1. The posterior palatal seal provides retention, stability, and prevention of air leakage for maxillary dentures.
2. It is located along the junction of the hard and soft palate and extends from the pterygoid hamulus on either side.
3. Special techniques like using indelible pencil and having the patient say "AH" are used to identify and record the seal area during impression making.
This document summarizes important anatomic landmarks of the mandible relevant for denture impressions and prosthetics. It describes landmarks like the labial frenum, buccal frenum, lingual frenum, buccal shelf, retromolar pad, and mylohyoid muscle. The document explains how these structures limit denture borders and notes the clinical significance of properly recording landmarks during impressions. It also outlines supporting structures like the buccal shelf and relief areas like the mental foramen that must be accommodated in a well-fitting mandibular denture.
This document discusses the posterior palatal seal (PPS) in detail. It defines the PPS and describes its supporting structures, functions, anatomical considerations like the vibrating line and muscles of the soft palate. It also discusses parameters of the PPS like size and shape, and techniques to record the PPS, including conventional, fluid wax, and arbitrary scraping techniques. The document provides an in-depth overview of the PPS for removable dentures.
This document discusses anatomical landmarks that are important for complete dentures. It defines landmarks as recognizable anatomic structures used as reference points. The maxilla and mandible each have limiting structures that determine the denture border, supporting structures that tolerate biting forces as foundations for the denture, and stress relieving structures that should be relieved in the denture due to being fragile or prone to resorption. Specific maxillary landmarks include the labial and buccal frenums, hard palate, and tuberosity. Mandibular landmarks include the labial frenum, buccal shelves, and residual ridge. Understanding these landmarks is crucial for achieving proper retention, stability, and support of complete dentures.
This document discusses anatomical landmarks that are important for making impressions for complete dentures. It describes landmarks in the maxilla like the hard palate, rugae, maxillary tuberosity, incisive papilla, and fovea palatine which provide support or need relief. Limiting structures like the labial and buccal frenums are also outlined. For the mandible, supporting areas include the buccal shelf and residual ridge while the mylohyoid ridge and mental foramen require relief. The principles of impression making and objectives of obtaining retention, stability and support are reviewed. Techniques for primary impressions using compound or alginate are demonstrated.
1. The anatomical landmarks of the maxilla and mandible are important reference points for denture fabrication. They include limiting structures like the labial and buccal frenums which determine denture border extent, and supporting structures like the hard palate and residual ridges which support the denture.
2. Careful consideration of these landmarks aids in properly distributing forces from the denture bases onto the supporting tissues and designing denture borders that are harmonious with normal function of surrounding structures.
3. Understanding the landmarks guides border molding techniques and ensures a well-fitting denture that is retained in place during mouth movements.
The key anatomical landmarks of the mandible that are important for denture construction include:
1) The labial and buccal vestibules which determine the space available for denture flanges. The masseter muscle can cause bulging in the buccal vestibule during function.
2) The retromolar pad which forms the posterior seal of mandibular dentures. Denture bases should only extend partially over the pad.
3) The mylohyoid ridge which influences the shape of the lingual denture flange. Relief areas like the mental foramen and torus mandibularis should also be accounted for.
This document discusses important anatomical landmarks in the maxilla and mandible that are relevant for denture fabrication. In the maxilla, these include the incisive foramen, hard palate, rugae, vestibules, and pterygomandibular raphe. Important limiting structures are the labial and buccal frenums and vestibules. The hamular notch and palatal seal are also mentioned. Similarly, anatomical landmarks in the mandible like the mental foramen, retromolar pad, and alveololingual sulcus are identified. The primary and secondary stress bearing areas are the residual ridge and buccal shelf.
This document discusses the anatomy and clinical significance of denture bearing areas in the maxilla and mandible. It describes the supporting and limiting structures, including the oral mucosa, residual ridges, hard palate, rugae, and tuberosities. The maxilla provides a larger denture bearing area than the mandible. Key anatomical landmarks that limit denture extension are the labial and buccal frenums, vestibules, hamular notch, and posterior palatal seal area. The document emphasizes that understanding these structures is important for designing complete dentures that are optimally retained and supported.
The document discusses anatomical landmarks of the denture bearing area of the mandible. Key supporting structures are the residual alveolar ridge, buccal shelf area, and retromolar pad. Relief areas include the genial tubercle, mental foramen, and mandibular tori. Peripheral/limiting areas include the labial frenum, buccal frenum, labial and buccal vestibules, and lingual frenum.
This document discusses techniques for recording and adding a posterior palatal seal to maxillary dentures. It begins with definitions of posterior palatal seal and area. There are several techniques described such as functional, semi-functional, and empirical. The functional technique uses low melting wax to border mold tissues within physiologic limits. The empirical technique develops the seal directly on the stone cast by grooving. Multiple empirical techniques are outlined that vary the depth and shape of the groove. The document also provides methods for adding a posterior palatal seal to existing dentures, such as using modeling compound or wax to develop the seal shape intraorally first before incorporating it into the denture base.
This document discusses anatomical landmarks of the maxilla and mandible that are important for complete denture construction. It describes limiting structures, supporting structures, and relief areas. Limiting structures guide denture extension and include frenums, vestibules, and hamular notch. Primary stress bearing areas are the hard palate and posterior slopes of the ridge. Secondary areas include rugae and tuberosities. Relief must be provided for frenums, incisive papilla, and mental foramen to prevent pain and denture displacement. Landmarks help determine the extent and contours of complete dentures.
This document describes important anatomical landmarks in the edentulous maxilla and mandible that are relevant to complete denture prosthodontics. It defines relief areas, support areas, and stress bearing areas. For the maxilla, it identifies landmarks like the labial and buccal frenums, labial and buccal vestibules, alveolar ridges, maxillary tuberosity, incisive papilla, palatine rugae, torus palatinus, midpalatine raphe, fovea palatini, hamular notch, vibrating line, and posterior palatal seal area. For the mandible, it identifies landmarks like the labial and buccal frenums
This document defines key terminology in prosthodontics such as prosthodontics, prosthesis, dentulous, and edentulous. It then discusses anatomical landmarks that are important for complete denture fabrication including intraoral structures like the residual ridge, maxillary tuberosity, mandibular tori, and border structures that limit the periphery of dentures like labial and lingual frenae. Finally, it briefly defines the objectives of a complete denture in terms of retention, stability, and support.
This document discusses anatomical landmarks that are important for complete dentures. It describes limiting structures, supporting structures, and relief areas for both the maxilla and mandible. Limiting structures guide the borders of the denture and include things like the labial and buccal frenums. Supporting structures bear stress from function, like the hard palate and residual ridges. Relief areas need space in the denture, like the incisive papilla and midpalatine raphe, to prevent soreness. Understanding these landmarks helps ensure a well-fitting denture that does not cause pain or dislodgement.
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2. MUCOUS MEMBRANE
• Composed of mucosa and submucosa
• The denture base rests on the mucous membrane which serves as a cushion
between the base and the supporting bone
• Mucosa is classified as :
• Masticatory
• Specialised
• Lining
3. Masticatory mucosa-
• mucosa covering the hard palate and crest of the residual ridge
• It is formed by keratinised stratified squamous epithelium and a
thin layer connective tissue lamina propria
Specialised mucosa- It covers the dorsal surface of the tongue
and is keratinized
Lining mucosa- It is nonkeratinised and it covers
lips,cheeks,sulcus,soft palate,ventral surface of tongue, and
slopes of residual ridge
4. Submucosa
• Formed by connective tissue
• It makes up the bulk of mucous membrane
• The support and stability depends on the thickness of
submucosa and its attachment to the underlying bone
• A dense firmly attached submucosa will successfully
withstand the pressure of the denture
• A thin layer can be easily traumatised
• A loosely attached layer is easily displaceable
8. LIMITING STRUCTURES
They determine and confine the extent of the denture
• LABIAL FRENUM
It is a fibrous band covered by mucous membrane that
extends from the labial aspect of the residual ridge to the
lip
It has no muscle fibers
Hence it is a passive frenum
A v-shaped notch should be recorded during impression
making to accommodate the labial frenum
9. LABIAL VESTIBULE
• It is defined as the portion of the oral cavity
which is bounded on one side by the teeth,
gingiva and alveolar ridge(in the edentulous
mouth the residual ridge)and on other side by
the lips and cheeks
• The vestibule is covered by lining mucosa
10. BUCCAL FRENUM
• The buccal frenum seperates the labial
and buccal vestibule
• It attaches:
levator anguli oris-attaches
beneath the frenum
orbicularis oris –pulls the frenum in
forward direction
buccinator-pulls the frenum in
backward direction
• These muscle influences the position of
the buccal frenum hence it needs greater
clearance on the buccal flange of the
denture
11. BUCCAL VESTIBULE
• Is the area from the distal portion of the buccal
frenum to the hamular notch posteriorly.
• This space may be actual or potential and if a space
(postmalar pocket) exists it should be filled.
• The size of buccal vestibule varies with:
Contraction of buccinators
Amount of bone loss in the maxilla
12. HAMULAR NOTCH
• It is depression situated between the maxillary
tuberosity and the Hamulus of medial pterygoid plate.
• It is soft area of loose areolar tissue.
• The distolateral border of denture base rests in the
hamular notch.
• The denture border should extend till the hamular
notch.
13. POSTERIOR PALATAL SEALAREA(POSTDAM)
• It is defined as the soft tissue at or along the junction of
the hard and soft palate on which pressure within the
physiological limits of the tissues can be applied by a
denture to aid in the retention of the denture.
• This is the area of the soft palate that contacts the
posterior surface of the denture.
• It prevents air entry between the denture base and the
soft palate.
• It is the area between the anterior and posterior vibrating
line
14. Functions:
Aids in retention
Reduces the tendency for gag reflex
Prevents food accumulation
Compensates for polymerisation shrinkage
It can be divided into two regions based upon anatomical
landmarks
Pterygomaxillary seal
Postpalatal seal
15. PTERYGOMAXILLARY SEAL
This is the part of posterior palatal seal that extends across the
hamular notch(pterygomaxillary notch) and it extends 3-4 mm
anterolaterally to end in the mucogingival junction on the posterior
part of maxillary ridge.
The posterior extent of the denture in this region should end in the
hamular notch and not extend over the hamular process as this can
lead to severe pain during denture wear.
16. POSTPALATAL SEAL
This is a part of posterior palatal seal that extends between
the two maxillary tuberosity
17. The points should be remember while recording the
posterior palatal seal
The posterior border of the denture should not be
placed over the mid palatine raphe or the posterior
nasal spine
If there is a palatine torus which extends
posteriorly the tori should be removed
The position of fovea palatina also influences the
position of posterior border of denture.it can
extend 1-2mm across the fovea palatina
18. If a mid palatine fissure is present then the pps
should extent into it to obtain a good
peripheral seal
In patients with thick ropy saliva the fovea
palatina should be left uncovered or else the
thick saliva flowing between the tissue and
denture can increase the hydrostatic pressure
and displace the denture
19. DIFFERENT FORMS OF POSTERIOR PALATAL SEAL
(WINLAND AND YOUNG)
According to shape:
• Single bead scribed on the posterior vibrating line
• Double line scribed in the anterior and posterior
vibrating line
• Butterfly shaped pps
• Butterfly shaped pps with notching of posterior
vibrating line
• Butterfly shaped pps with notching of hamular notch
20. Variations used with different shaped soft palate based on
the classification
• Class I-a butterfly shape pps with 3-4mm width
• Class II-pps is narrow with 2-3mm of width
• Class III-a single beading made on the posterior
vibrating line
21. VIBRATING LINE
• The imaginary line across the posterior part of the palate
marking the division between the movable and immovable
tissues of the soft palate which can be identified when the
movable tissues are moving
• It marks when the individual says “ah”
• It extends from one hamular notch to other
22. • It passess about 2 mm infront of the fovea
palatina
• This line should lie on the soft palate
• The distal end of the denture must cover the
tuberosities and extend into hamular notch.it
should end 1-2mm posterior to the vibrating
line.
23. There is a presence of two vibrating lines:
1. Anterior vibrating line
2.Posterior vibrating line
24. ANTERIOR VIBRATING LINE
• An imaginary line lying at the junction between the
immovable tissues over the hard palate and the slightly
movable tissues of the soft palate.
• The anterior vibrating line is cupid bow shaped
• Due to the projection of posterior nasal spine ,the
anterior vibrating line is not a straight line between
both hamular process
• It can be located by asking the patient to perform
”Valsalva maneuvar” or by asking the patient to say
“ah” in short vigorous bursts.
• Valsalva maneuvar : the patient is asked to close his
nostrils firmly and gently blow through his nose.
25. POSTERIOR VIBRATING LINE
• An imaginary line is located at the junction of the soft
palate that shows limited movement and the soft palate
that shows marked movement
• The posterior vibrating line is an imaginary line at the
junction of aponeurosis of the tensor veli palatine
muscles and the muscular portion of the soft palate
• It is recorded by asking the patient to say “ah”in short
but normal vigorous fashion
• This line is usually straight
26. PRIMARY STRESS BEARING AREA
• HARD PALATE
1. The horizontal portion of hard palate lateral to the
midline act as primary supporting area
2. The trabecular pattern of bone is perpendicular to
the direction of force making it capable of withstanding
any amount of force
SUPPORTING
STRUCTURES
27. RESIDUAL RIDGE
• Defined as the portion of alveolar ridge and its soft tissue
covering which remains following the removal of teeth
• It resorbs rapidly following extraction and continue
throughout life in a reduced rate
• The submucosa over the ridge has adequate resiliency to
support the denture
28. SECONDARY STRESS BEARING AREA
RUGAE
• These are mucosal folds located in the anterior region
of palatal mucosa
• The folds of mucosa play an important role in speech
• Metal denture base reproduces this contour making it
very comfortable for patient
29. MAXILLARY TUBEROSITY
• It is bulbous extention of the residual ridge in the2nd
and 3rd molar region
• The posterior part ridge and the tuberosity are most
important parts of support because they are least likely
to resorb.
30. RELIEF AREAS
1. INCISIVE PAPILLA
• It is a midline structure situated behind the central incisors
• It is the exit point of nasopalatine nerves and vessels
• It should be relieved if not the denture will compress the
vessels or nerves and lead to necrosis of distributing areas
and paraesthesia of anterior palate
31. MIDPALATINE RAPHE
• It is the median suture area covered by a thin
submucosa
• This area is the most sensitive part of the
palate to pressure
32. FOVEA PALATINA
• The fovea is formed by the coalescence of the ducts of
several mucous glands
• This act as an arbitrary guide to locate the posterior
border of the denture
• The secretion of the fovea spreads as a thin film on the
denture through by aiding in retention
• In patients with thick ropy saliva the fovea palatina
should be left uncovered or else the thick saliva flowing
between the tissue and the denture can increase the
hydrostatic pressure & displace the denture
33. CUSPID EMINENCE
• It is a bony elevation on the residual alveolar
ridge formed after extraction of the canine
• It is located between the canine and 1st
premolar region
34. TORUS PALATINUS:
If the torus extends to the bony limits of
the palate leaving little or no room to place
the posterior border seal then its removal is
indicated
35. PALATAL THROAT FORM
HOUSE’S CLASSIFICATION
Class I-the soft palate is almost horizontal curving gently downwards
ClassII-the soft palate turns downwards at about45 degree angle from
the hard palate
ClassIII-the palate turns downwards sharply at about 70degree angle to
the hard palate
36. MUSCLES OF PALATE
Palate consists of 5 paired muscles
1. Tensor veli palatini muscle
2. Levator veli palatine muscle
3. Palatopharyngeus muscle
4. Palatoglossus muscle
5. Muscle of the uvula
37. TENSOR VELI PALATINI MUSCLE
• ORIGIN:
a) lateral side of auditory tube
b) adjoining part of the base of the skull
• INSERTION:
Pterygoid Hamulus ,passes through the origin of buccinator and
flattens out to form palatine aponeurosis
• ACTIONS:
Tightens the anterior part of soft palate ,opens the auditory tube to
equalize the air pressure between the middle ear and the
nasopharynx
38. LEVATOR VELI PALATINI
• ORIGIN:
a) medial aspect of auditory tube
b) adjoining part of inferior part of petrous temporal bone
• INSERTION:
It is inserted into the upper surface of palatine aponeurosis
• ACTION:
a) elevates soft palate and closes the pharyngeal isthumus
b) opens the auditory tube
39. MUSCULOUS UVULAE
• ORIGIN:
Posterior nasal spine
Palatal aponeurosis
• INSERTION:
Mucous membrane of uvula
• ACTION:
Pulls up the uvula
40. PALATOGLOSSUS
• ORIGIN:
Oral surface of palatine aponeurosis
• INSERTION:
a) descends in the palatoglossal arch
b) side of the tongue at the junction of its oral and pharyngeal parts
• ACTION:
a) Pulls up the root of the tongue
b) Approximate the palatoglossal arch
c) Closes the oropharyngeal isthumus
41. PALATOPHARYNGEUS
• ORIGIN:
Anterior fasciculus-posterior border of hard palate
• INSERTION:
a) Posterior border of the lamina of thyroid cartilage
b) wall of the pharynx and its median raphe
• ACTION:
Pulls up the wall of the pharynx and shortens it during swallowing