Dental Implants Prosthetic Restoration

Question 1

Which impression technique captures the three-dimensional position of implants in the mouth using a tray that remains in the mouth during cast separation?

Accepted Answer

Open-tray (pick-up) impression

Answer

Closed-tray impression

Answer

Alginate irreversible hydrocolloid technique

Answer

Bite registration technique

Question 2

Digital implant impressions using intraoral scanners compared to conventional impressions offer:

Accepted Answer

Elimination of physical impression materials and improved patient comfort

Answer

Lower accuracy for multiple implants

Answer

Requirement of impression copings still

Answer

Limited use to single tooth cases only

Question 3

An implant-supported fixed partial denture (implant bridge) requires at least how many implants per pontic to maintain appropriate force distribution?

Accepted Answer

Ideally one implant per tooth replaced, but minimum one at each end

Answer

One implant total is sufficient

Answer

Three implants regardless of span

Answer

One implant per pontic unit always

Question 4

The emergence profile of an implant crown refers to:

Accepted Answer

The contour of the restoration as it emerges from the gum tissue

Answer

The angle of the implant in the bone

Answer

The height of the crown above the gum

Answer

The shade of the porcelain used

Question 5

Which prosthetic material is most commonly used for implant-supported crowns in the posterior region due to its strength?

Accepted Answer

Monolithic zirconia

Answer

Composite resin

Answer

Full-cast gold

Answer

Feldspathic porcelain

Question 6

The screw access channel in a screw-retained implant crown is typically sealed with:

Accepted Answer

Polytetrafluoroethylene (PTFE) tape and composite

Answer

Permanent composite resin

Answer

Zinc oxide eugenol cement

Answer

Glass ionomer cement only