Questions and Answers
What is the preliminary difference between natural dentition and complete denture occlusion?
How does the maxillary arch heal after extractions?
Up and in
How does the mandibular arch heal after extractions?
Down and out
What is the Space of Donders?
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How would you describe the space to accommodate dentures?
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What are the goals of complete denture occlusion?
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What are the three staples of dentures?
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What is balanced occlusion?
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What should you evaluate during an MMR appointment?
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What is the goal for the maxillary occlusion rim?
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What affects lip support?
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What is Camper's line?
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What is the Frankfort Horizontal?
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What does the Fox plane assist with?
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What is the Buddle Corridor?
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How should the occlusal plane be adjusted?
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What is the Vertical Dimension of Rest (VDR)?
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What is the distance between VDR and VDO called?
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How should the anterior teeth be set in relation to the arch?
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In denture occlusion, do the anterior teeth touch in maximum intercuspation (MIC)?
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What results in facial collapse?
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When should you start considering proper lip support?
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What does the selection of anterior teeth influence?
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Study Notes
Preliminary Differences Between Natural Teeth and Complete Dentures
- Natural teeth are held by the periodontal ligament (PDL), allowing slight movement and acting as a shock absorber.
- Complete dentures rest on soft, movable tissues, resulting in potential displacement and trauma to supporting structures from premature deflective contacts.
Healing Processes After Extractions
- Maxillary arch heals by moving "up and in."
- Mandibular arch heals by moving "down and out."
Space Considerations for Dentures
- Space of Donders: area between the tongue's dorsum and the palate.
- Limited space for accommodating dentures is described as very restrictive.
Goals of Complete Denture Occlusion
- Minimize trauma to supporting structures.
- Preserve remaining structures and enhance stability of dentures.
- Restore aesthetics, speech, and mastication in that order of priority.
Key Components of Denture Functionality
- Three staples of dentures: support, stability, and retention.
- Balanced occlusion involves simultaneous contact between maxillary and mandibular teeth during various jaw movements.
Maxillary and Mandibular Occlusal Rim Goals
- Maxillary rim should contour for phonetics and aesthetics, resting slightly below the lip line.
- Mandibular rim should maintain contact with the maxillary rim, incorporating a horizontal overjet of 1-2mm.
Understanding Vertical Dimension (VD)
- Vertical dimension is the distance between two selected points, maintained through occlusion (OVD) or muscle contraction (VDR).
- Establishing the correct OVD requires careful measurement and patient feedback.
Interocclusal Distance
- Defined as the difference between VDR and VDO, typically ranging from 2-4mm.
- Inadequate or excessive interocclusal distance can lead to improper occlusion and functional issues.
Recording Centric Relation (CR)
- CR represents the jaw position when condyles articulate with the thinnest part of their discs, requiring correct OVD for proper records.
- Alu-wax is an interocclusal recording medium used to capture accurate relationships during CR.
Tooth Selection Factors
- Anterior teeth selection involves considerations of width, shape, size, and character consistent with the patient's facial features and age.
- Available materials for dentures include porcelain, plastic, and Interpenetrating Polymer Networks (IPN), each with distinct characteristics.
Anterior and Posterior Teeth Characterization
- Anterior teeth should align with the smile line; characterizations should reflect the patient’s personality and age.
- For posterior teeth, factors influencing selection include material, size, and occlusal height aligned with interarch distances.
Importance of Occlusal Rims
- Occlusal rims function as occluding surfaces that assist in achieving maximum intercuspation records and guide tooth arrangement.
- Placement of guidelines on occlusal rims is crucial for the final aesthetics and function of the complete denture.
Guidelines for Tooth Arrangement
- The arrangement must follow the arch's contour; maxillary and mandibular teeth should interdigitate properly.
- Canine positioning is key for ensuring proper bite registration and aesthetics.
Role of Aesthetics in Denture Design
- Aesthetic considerations include gingival heights variation based on tooth type, with meticulous attention to natural appearance and age appropriateness.
- Staining methods can also be used to enhance natural looks, especially on common staining areas like incisal edges.
Laboratory Communication
- Essential information for the lab includes patient demographics and existing structures to facilitate quality denture fabrication tailored to individual needs.
Final Considerations
- The balance of functional, aesthetic, and physical attributes in denture design is essential for patient satisfaction and effective oral function.
- Continuous evaluation of denture placement and function throughout the fitting process ensures optimal results.
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Description
This quiz explores the key differences between natural teeth and complete dentures, healing processes after tooth extractions, and the essential considerations for denture functionality. Learn about occlusion goals and the anatomy relevant to denture placement and maintenance.
