CIT CIT Prosthetics & Restoration 1 — Questions and Answers
Question 1: Which type of implant-supported restoration replaces a single missing tooth without involving adjacent teeth?
- Fixed partial denture
- Single-unit crown (Correct answer)
- Overdenture
- Full-arch bridge
Correct answer: Single-unit crown
A single-unit crown is an implant-supported restoration that independently replaces one tooth without affecting neighboring teeth.
Question 2: What is the primary purpose of an emergence profile in implant prosthetics?
- To determine implant depth
- To shape the peri-implant soft tissue contour (Correct answer)
- To measure occlusal force
- To select abutment material
Correct answer: To shape the peri-implant soft tissue contour
The emergence profile shapes the transition from the implant or abutment through the soft tissue, creating a natural-looking gingival contour.
Question 3: Which impression technique captures the position of the implant in the arch for prosthetic fabrication?
- Alginate wash impression
- Open-tray implant-level impression (Correct answer)
- Bite registration wax
- Facebow transfer
Correct answer: Open-tray implant-level impression
An open-tray implant-level impression uses impression copings and allows the tray to remain open so copings are retrieved with the impression.
Question 4: What material is commonly used for CAD/CAM-milled implant abutments due to its strength and biocompatibility?
- Acrylic resin
- Zirconia (Correct answer)
- Cobalt-chromium
- Gold alloy
Correct answer: Zirconia
Zirconia is widely used for CAD/CAM abutments because it combines excellent biocompatibility with high flexural strength and esthetic tooth-colored appearance.
Question 5: A screw-retained implant crown differs from a cement-retained crown primarily because it:
- Requires a longer healing abutment
- Can be retrieved without cutting the restoration (Correct answer)
- Has better esthetics in the anterior region
- Requires less torque during placement
Correct answer: Can be retrieved without cutting the restoration
Screw-retained crowns are accessed via a screw channel and can be removed non-destructively, allowing easy retrieval and maintenance.
Question 6: Which occlusal scheme is generally recommended for implant-supported full-arch prostheses to distribute forces evenly?
- Group function occlusion
- Canine-guided occlusion
- Lingualized occlusion
- Bilateral balanced occlusion (Correct answer)
Correct answer: Bilateral balanced occlusion
Bilateral balanced occlusion distributes masticatory forces across all teeth simultaneously in both centric and eccentric movements, reducing stress on implants in full-arch cases.
CIT CIT Prosthetics & Restoration 1
Which type of implant-supported restoration replaces a single missing tooth without involving adjacent teeth?