Bite registration
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A bite registration is made by having the patient bite into softened baseplate wax or modeling wax in order to record how their teeth come together. The wax is softened and placed over the teeth, and the patient is instructed to bite down normally until the wax hardens. This bite registration is then used to articulate study models to accurately reproduce the patient's occlusion.
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This document discusses the posterior palatal seal, including its definition, function, anatomical considerations, techniques for recording it, and potential errors. The key points are:
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1) Surveying involves marking the height of contour and infrabulge on teeth to determine the path of insertion and areas for retention. Guide planes are then prepared parallel to this path to restrict movement.
2) Analysis determines if the initial survey line provides sufficient retention and whether tilting the cast is needed.
3) The final survey line is marked, selecting retentive undercuts opposing the path of displacement. Guide planes are prepared to further limit movement to a single path.
Altered casts technique
The document describes the altered cast technique, which is a modification of the functional impression technique used in removable partial dentures. It involves making a functional impression to capture the displaced shape of the residual ridge under load. The edentulous area is then cut out from the original master cast. The framework and functional impression are seated on the modified master cast. Stone is poured into the impression to create an altered, or corrected, cast reflecting the displaced ridge shape under load. This ensures uniform support of the denture base in the functional form of the residual ridge.
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2. It emphasizes the importance of distributing forces equally to abutment teeth and residual ridges. Impressions should record these areas under uniform loading.
3. The dual impression technique generates a corrected cast by modifying a functional impression in the laboratory. This can improve stress distribution for removable partial dentures.
Self correcting anomalies
This document discusses self-correcting anomalies that arise during development from the predentate period to the permanent dentition period. It classifies anomalies based on the developmental period and describes several types including retrognathic mandible, anterior open bite, deep bite, flush terminal plane, primate and physiological spacing, anterior deep bite, end on molar relation, mandibular anterior crowding, and the ugly duckling stage. Many of these anomalies correct on their own through continued growth, eruption of teeth, attrition, and movement of jaws without requiring dental treatment.
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This document discusses impression procedures for removable partial dentures. It defines partial denture impressions and differentiates them from complete denture impressions. Various impression techniques are described including anatomic form impressions, functional impression techniques like McLean's method and the functional reline method. The document reviews literature on modified techniques like the altered cast technique and selective tissue placement impressions. It emphasizes the importance of functional impressions to distribute load and maximize longevity of remaining structures. In summary, the choice of impression technique impacts the support, function and longevity of the resulting removable partial denture.
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The document discusses face bows, which are used to record the spatial relationship between the maxilla and temporomandibular joints. This allows for accurate transfer of jaw relations to an articulator. The document covers the history and evolution of face bows, from early prototypes to modern designs. It describes the parts of face bows including the U-shaped frame, condylar rods/earpieces, bite fork, and locking/reference points. Different types are classified including arbitrary, fascia, and earpiece models. The uses, advantages, and limitations of various designs are also outlined.
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The document outlines the steps in fabricating complete dentures, which include clinical procedures like mouth preparation and recording jaw relations, and laboratory procedures such as making diagnostic casts, fabricating custom trays, and processing the denture. Key steps involve secondary impressions to create a master cast, arranging artificial teeth, processing the denture, and denture insertion with postinsertion maintenance.
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This document discusses the process of denture insertion and adjustment. The key steps include: 1) examining the finished denture for any areas causing discomfort, interference, or aesthetic issues; 2) modifying the occlusion as needed; 3) instructing the patient on denture use and care; and 4) assessing denture retention, stability, and occlusion. The dentist checks for pressure areas, sharp edges, and proper extension and makes any necessary adjustments to ensure a well-fitting, functional denture.
Vertical jaw relation
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Occlusal schemes in complete denture
Occlusion refers to the relationship between opposing teeth when the jaws are closed. There are several types of complete denture occlusion including balanced, monoplane, and lingualized occlusion. Balanced occlusion involves simultaneous anterior and posterior tooth contacts on both sides during chewing and is unique to dentures but enhances stability. It requires a minimum of three contact points. Monoplane occlusion uses non-anatomic teeth without cuspal height for a simpler arrangement, while lingualized occlusion positions the maxillary lingual cusps against the mandibular teeth. Both have advantages and disadvantages related to function, forces, and appearance. Proper planning of occlusion is important for complete dentures.
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Similar to Bite registration
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2. Interocclusal records involve using softened wax or other materials placed between teeth to record the jaw relationship. Occlusion rims are used when there are no contacts between natural teeth.
3. Establishing occlusion involves recording occlusal pathways over 24-48 hours by having the patient wear a registration. The registration is then used to arrange the artificial teeth to accept eccentric jaw movements.
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Taking an impression is an important step in complete denture construction as it provides an accurate negative registration of the denture bearing and border seal areas of the edentulous mouth. The impression must cover as much of the denture bearing surface as possible to provide retention, support, and stability of the denture. It must also record fine tissue details and form the denture borders. Selecting the proper impression material based on the patient's mouth condition is important. A complete denture impression should provide retention, support, stability, tissue preservation, and esthetics.
laboratory procedures in make of complete denture
Upload By : Ahmed Ali Abbas
Babylon University College of Dentistry
download this file from Website on google is
theoptimalsmile.wix.com/dentistry
تحميل بقلم: أحمد علي عباس
جامعة بابل كلية طب الأسنان
تحميل هذا الملف من موقع على جوجل
theoptimalsmile.wix.com/dentistry
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This document discusses relining and rebasing techniques for dentures. It begins with definitions, indicating that relining involves adding material to the denture base to improve fit, while rebasing replaces the entire denture base. It then covers indications, contraindications, tissue and denture preparation steps. Several static closed-mouth techniques for the maxilla and mandible are described, as well as open mouth and functional techniques. Finally, laboratory techniques like the flask, articulator and jig methods are summarized. The conclusion recommends regular recalls for relined or rebased dentures. A literature review covers a case report on a one-visit relining and a study evaluating resilient and hard denture liners.
Final impression (shivani deshpande)
This document provides information on final impressions. It defines a final impression as one made for the purpose of fabricating a prosthesis after initial registration. It discusses different types of impressions based on purpose and technique. The objectives of making an accurate impression are also outlined. The document then describes the process of making a final impression using custom trays, stock trays, or record bases. Details are provided on border molding, tray preparation, material selection, and making impressions for both maxillary and mandibular arches. Digital impression systems are also briefly discussed.
TWIN BLOCK APPLIANCE THERAPY
This document provides an overview of the Twin Block appliance. Some key points:
- The Twin Block appliance was developed by William J. Clark in 1977 and consists of maxillary and mandibular bite blocks designed to be worn 24 hours a day.
- The inclined planes on the upper and lower bite blocks are angled at 70 degrees to encourage forward mandibular growth.
- Treatment involves an active phase to correct sagittal discrepancies followed by a support phase to maintain corrections until the occlusion is established.
- Functional appliances like Twin Block are thought to stimulate mandibular growth through remodeling of the glenoid fossa and pterygoid response to the new functional demands placed on the mastic
Apicoectomy
This document provides information about the surgical procedure of apicoectomy. It begins with an introduction defining apicoectomy as the surgical resection and removal of the root tip and pathological periapical tissues. It then lists the indications and contraindications for the procedure. The rest of the document details the armamentarium, surgical technique including designing the flap, localizing and exposing the apex, resection of the apex, retrograde filling if needed, and wound closure. The surgical technique section provides step-by-step details of each part of the procedure.
COMPLICATIONS OF EXODONTIA AND THEIR MANAGEMENT.pptx
The document discusses potential complications that can arise from exodontia (tooth extraction) and their management. Some complications include soft tissue injury, problems with the extracted tooth, injuries to adjacent teeth, injuries to bony structures, oroantral communications, and post-operative bleeding. Specific injuries that can occur include tearing of soft tissue flaps, puncture wounds, abrasions, root fracture, root displacement, luxation of adjacent teeth, and extraction of the wrong tooth. Proper techniques such as adequate flap design, controlled force, and identification of tooth anatomy can help prevent complications, while injuries are generally managed by repair, stabilization, cleaning, and follow-up restoration or fixation as needed.
AURICULAR PROSTHESIS (SEMI 3).pptx
This document discusses the fabrication process of an auricular prosthesis. It begins with definitions of maxillofacial prosthetics and discusses the objectives and advantages/disadvantages of auricular prostheses. It then outlines the full process of fabrication including taking an impression, creating a working cast, sculpting a wax pattern, investing and creating a mold, processing the prosthesis with silicone, applying color, and retaining the prosthesis. The overall goal is to restore esthetics, function, and improve the patient's psychological well-being using prosthetic replacement of missing ear structures.
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Obturators ii / dental implant courses by Indian dental academy
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COMPLICATIONS OF EXODONTIA AND THEIR MANAGEMENT.pptx
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Head gear in orthodontics
This document provides information on headgear, including its components, principles of use, types, and applications in orthodontic treatment. Headgear delivers extraoral force from a cranial support to intraoral appliances. It consists of a facebow, force element, and head cap. Forces from headgear can distalize teeth and maxilla through different anchorage points. Types include cervical, occipital, and high pull headgear. Headgear is useful for orthopedic effects, anchorage reinforcement, molar distalization, and space maintenance.
My open bite case fatema
This case report describes the orthodontic treatment of a 24-year-old female patient presenting with an anterior open bite. Treatment objectives were to correct the open bite, spacing, establish a normal overjet and overbite, and improve aesthetics and function. Edgewise brackets were bonded and initial leveling was performed. Canine retraction and incisor approximation were accomplished using power chains and arch wires. Cephalometric analysis revealed the lower incisors were positioned too far forward. Arch coordination and 5mm lower arch contraction were performed to achieve the treatment objectives. Over two years of treatment, a Class I canine and molar relationship with satisfactory interdigitation and correction of the open bite were achieved.
Magnet in orthodontics
Magnets have been used in orthodontics since the 1970s to provide tooth movement. They provide advantages over conventional appliances like constant force levels without decay, less patient discomfort, and faster tooth movement. Various types of magnets can be used in clinical applications like impacted tooth relocation, diastema closure, extrusion or intrusion of teeth, and malocclusion correction. While magnets offer benefits, they also have disadvantages like corrosion, bulkiness, and thermal sensitivity that limit their routine use in practice.
Case report
This document presents a case report on the orthodontic treatment of a 16-year-old female patient named Pinki who presented with crowding in both dental arches. She had previously undergone unsuccessful treatment with a removable appliance by an underground student. The current treatment involved fixed appliance therapy including initial leveling and alignment with round wires followed by use of rectangular wires to correct minor irregularities and achieve arch contraction. Interdigitation was improved with elastics. Post-treatment intraoral photographs show significant improvement in crowding and occlusion.
Impression orthodontics
This document provides instructions for making alginate impressions. It describes positioning the patient upright for maxillary and mandibular impressions. Stock trays should be selected to leave 6mm of space between the tray and mucosa. Trays may need modification by adding wax. For maxillary impressions, alginate is loaded into the tray and pressed upward and backward. For mandibular impressions, alginate is placed in the retromolar area before inserting the loaded tray. Proper mixing, border molding, and quick removal of the impression is important. Impressions should be disinfected and poured within an hour to prevent syneresis. Modifications are described for patients with gagging, salivation issues, or hyper
Open bite
This document presents two case reports of patients with anterior open bite treated using different approaches based on the patients' tongue posture at rest.
The first case involved a patient with a high tongue posture, treated successfully with a Hawley retainer and crib to restrain the tongue horizontally. Results were stable 32 years later.
The second case had a horizontal tongue posture, treated initially with headgear, expansion screw, and palatal crib to restrain the tongue. Follow up treatment corrected the malocclusion and stable results were seen 10 years later.
The document discusses how determining tongue posture guides open bite treatment, with restraining approaches used for high/horizontal postures and orienting treatment for low/very low post
Impression
This document provides instructions for making alginate impressions. It describes preparing the patient and selecting a stock tray, modifying the tray if needed, and taking impressions of the maxilla and mandible. Key steps include adjusting the patient's position, applying alginate to the tray and palate, inserting and seating the tray, and doing border molding before removal. The proper mixing of alginate and preventing syneresis after removal are also outlined. Modifications for patients with gagging or excess salivation are provided.
Overjet reduction(2)
This document discusses strategies for reducing overjet in orthodontic treatment. It presents four examples of patients requiring overjet reduction and proposes treatment plans for each. The key points covered are the four main ways to reduce overjet: moving the lower incisors forward, moving the upper incisors back, moving the mandible forward, and limiting maxillary growth. Factors like molar relationship, amount of extraction, and facial angle are considered for determining the best mechanics in each case.
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Bite registration
- 2. • A bite registration is an occlusal representation of how the maxillary and mandibular teeth intercuspate . • Bite registration is essential for the subsequent articulation of the maxillary and mandibular study models.
- 3. Bite registration via Baseplate wax/bite wax /modeling wax Method: • Base plate wax is manufactured in 3"x 5" sheets and sold by the box. • The 3"x5" sheet may easily be cut with a lab knife to accommodate the width of the dental aches . • If modeling wax is used , then it is rolled to a thickness of 10 mm and bent to make arch form. • It is then placed in the cast and gently place on the occlusal surface and the excess wax distal to the last erupted tooth is cut off. The excess wax on the buccal surface also trim with wax knife.
- 4. • Educate the pt about the purpose and procedure of bite registration. • . It is placed in the patient's mouth after it has been softened in warm water. • It is placed over the occlusal surfaces of either dental arch, depending on the operator's preference. • The patient is instructed to bite normally into the wax in centric occlusion. • The patient's teeth should remain embedded in the wax while the wax cools and hardens.
- 5. • The operator may choose to accelerate the cooling and hardening process by applying air from the air/water syringe. • Once this is accomplished, the operator carefully removes the wax bite registration from the oral cavity while making every attempt to avoid distorting it. • It is then inspected for accuracy and immediately disinfected by spraying or immersion.
- 6. Placing Bite Wax in Mouth.