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RDIII Question and answers verified to pass 2024/2025 $13.49   Add to cart

Exam (elaborations)

RDIII Question and answers verified to pass 2024/2025

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  • Course
  • BOXING AND EXPRESSION
  • Institution
  • BOXING AND EXPRESSION

RDIII Question and answers verified to pass 2024/2025 RDIII (F)- Master cast, die preparation Fixed prosthodontics procedure 1. Pt interview; diagnosis, treatment plant; tooth prep; provisionalization; impression; interocclusal (bite) registration 2. Master cast + die construction; crown fabri...

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  • September 16, 2024
  • 11
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • BOXING AND EXPRESSION
  • BOXING AND EXPRESSION
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flyhigher329
RDIII (F)- Master cast, die preparation
Fixed prosthodontics procedure
1. Pt interview; diagnosis, treatment plant; tooth prep; provisionalization;
impression; interocclusal (bite) registration
2. Master cast + die construction; crown fabrication
3. Try in; cementation; maintenance




Definitive (working/master) cast- what is it
Replica of prepped teeth, ridge areas, other parts of dental arch




Die- what is it
Positive reproduction of form of prepped tooth in any suitable substance




Requirements of working casts, dies
- Must be bubble free, esp along finish lines
- Must be free from distortion
- Working die must be removable but must return to exact position w/out
rotation
- Working dies must be trimmed to allow access for waxing instruments
- Working casts should be removable from its base




Most accurate method to occlude opposing casts

, By hand; no intervening bite registration material




When is interocclusal (bite) registration needed
If there is insufficient stability of casts for hand articulation
- When too many teeth missing, record base often required




Requirements for materials used for interocclusal records
- Limited resistance before setting (to avoid displacing teeth/mandible during
closure)
- Minimal dimensional change
- Easy to manipulate
- No adverse effects on tissues involved in recording procedures
- Accurately record incisal, occlusal surfaces of teeth
- Should be verifiable
- Over clinically reasonable time periods- must have solidity to retain shape,
strength when dental casts are articulated




How to prepare final impression
1. Trim lateral over-extension flush w/ custom tray


2. Trim vertical over-extension (pic)


-- Leave 5-8 mm vertical height from cervical margins of teeth

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