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1. What are the five parts of RPD metal framework?
- Rests
- Proximal Plates/Minor Connector
- Major Connectors
- Denture Base Connectors
- Retainers
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2. What is the recommended design sequence for the five parts?
- Rests
- Minor Connectors/Proximal Plates
- Major Connectors
- Denture Base Connectors
- Retainers
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3. What is the primary function of rests?
- primarily vertical support on the abutment teeth.
- direct functional forces in the long axis of the tooth.
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4. Describe the concept of positive rests?
- center is deeper
- slightly deeper at the tip than the marginal ridge area
- must not allow a RPD to slide off the tooth when in function
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5. How do you accomplish the positive rest?
- slightly deeper at the tip than the marginal ridge area.
- A properly prepared molar occlusal rest is spoon-shaped in its cross-sectional view
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6. What is the most important mechanical requirement for major connectors? Why is that important?
- Rigidity: Unite and utilize all remaining structures of the arch to provide the greatest potential to
- distribute and share functional forces
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7. Which type of maxillary major connectors is most commonly used?
- Anterior-posterior connector ( Double strap type)
- provides optimal rigidity with minimum bulk and coverage.
- posterior palatal metal connector should not extend beyond the vibrating line of the palate
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8. Name other types of maxillary major connectors and the indications for each?
- Single strap-type: Has to be thick and wide enough, no distal extension
- U-shaped (Horseshoe type): palatal tori
- Complete coverage: only anteriors remained, and/or periodontally compromised. When future anterior extension considered.
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9. Which type of mandibular major connectors is the choice of design whenever possible? What is the anatomical requirement for the design? When not feasible, what is the alternative?
- Lingual Bar: Sufficient space (7-8mm) must be available between the floor of the mouth (lingual frenum) and the crest of the gingiva.
- 2. The superior portion of the bar is positioned well away (3mm) from the gingival crest tissue.
- The lingual bar is the design of choice whenever possible because of simplicity and minimal tooth and mucosa contact.
- Lingual Plate: clinical examination indicates a high lingual frenum and floor of mouth attachments, with insufficient space (<7-8mm) to place a lingual bar
- When the anterior teeth are periodontally compromised and a support from the lingual side deemed benifitial.
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10. What is the butt-joint junction between the acrylic base and metal framework called?
Finishing line
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A ____________ is designed at the anterior and posterior margins of the posterior connector to provide a seal.
light post-dam
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Mandibular major connector cannot be __________ in design.
circular
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The _____________ is the portion of the framework that contacts the proximal side of the tooth, is also considered a minor connector.
proximal plate
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