CIT Prosthetics & Restoration Flashcards

What is the role of a bite registration record in implant prosthetic fabrication?

Answer: It captures the spatial relationship between upper and lower arches

A bite registration captures the maxillo-mandibular relationship so the dental laboratory can articulate casts correctly for prosthetic fabrication.

Which retention system uses a ball-and-socket mechanism to retain an implant overdenture?

Answer: O-ring attachment

O-ring attachments consist of a ball abutment on the implant and an O-ring in the denture housing, creating a ball-and-socket snap-fit retention.

Why is a radiograph taken after seating a final implant crown?

Answer: To verify complete seating and detect residual cement subgingivally

A post-seating radiograph confirms the crown is fully seated on the abutment and allows detection of any excess cement that could cause peri-implant inflammation.

The All-on-4 prosthetic concept places four implants in a specific configuration primarily to:

Answer: Use available anterior bone and avoid posterior grafting

All-on-4 tilts the two posterior implants to maximize contact with available anterior bone, enabling a full-arch fixed prosthesis without posterior sinus or ridge augmentation.

Which abutment design compensates for an implant placed at an angle that does not align with the desired prosthetic axis?

Answer: Angled or multi-unit abutment

Angled or multi-unit abutments redirect the prosthetic axis by a set number of degrees, correcting implant angulation discrepancies for a properly aligned restoration.

What is the recommended patient instruction regarding biting forces on a provisional implant restoration during osseointegration?

Answer: Avoid heavy biting and chewing hard foods

Excessive occlusal loading during osseointegration can disrupt the implant-bone interface, so patients are instructed to avoid hard or chewy foods.