CIT CIT Prosthetics & Restoration 4

Question 1

Which cement type is most appropriate for retrievable implant-supported crowns requiring periodic maintenance access?

Accepted Answer

Temporary provisional cement with low retentive strength

Answer

Temporary provisional cement allows retrievability for maintenance while providing adequate short-term retention.

Question 2

When designing a screw-retained implant crown, what is the ideal screw access channel angulation relative to the occlusal surface?

Accepted Answer

0–15 degrees off-axis to avoid esthetic compromise

Answer

Screw channels within 0–15 degrees of the implant long axis maintain adequate structural integrity and esthetics.

Question 3

A patient presents with a fractured zirconia implant crown three months after delivery. The most likely contributing factor is:

Accepted Answer

Excessive occlusal contacts in lateral excursion

Answer

Lateral excursive contacts create bending stresses that exceed zirconia's fracture toughness in unsupported areas.

Question 4

An implant-supported fixed partial denture (FPD) pontic rests on tissue. Which pontic design minimizes tissue irritation while maintaining cleansability?

Accepted Answer

Modified ridge-lap pontic with concave lingual surface

Answer

The modified ridge-lap design provides esthetic contour on the buccal while allowing floss access on the lingual.

Question 5

What is the primary purpose of using a torque wrench when seating an abutment on an implant?

Accepted Answer

To achieve manufacturer-specified preload without plastic deformation

Answer

Correct torque establishes optimal screw preload, clamping the abutment without yielding the screw material.

(CIT) Certified Implantology Technician Practice Test

(CIT) Certified Implantology Technician Practice Test

CIT CIT Prosthetics & Restoration 4