CIT CIT Bone Grafting & Osseointegration 5

Question 1

Which property of beta-tricalcium phosphate (β-TCP) makes it preferable to hydroxyapatite (HA) in certain ridge augmentation cases?

Accepted Answer

Faster resorption rate allowing replacement by native bone

Answer

β-TCP resorbs more rapidly than HA, creating space that is replaced by the patient's own bone, which is beneficial in sites where full bone substitution is desired.

Question 2

The 'critical size defect' concept in bone grafting refers to which of the following?

Accepted Answer

The smallest defect that will not heal spontaneously without intervention

Answer

A critical size defect is defined as the smallest osseous defect that will not heal completely without augmentation during the lifetime of the animal or patient.

Question 3

During second-stage implant uncovery, the clinician observes fibrous encapsulation around the implant rather than bone. This outcome is most consistent with which primary failure cause?

Accepted Answer

Micromotion exceeding 100–150 µm during the healing phase

Answer

Excessive micromotion during healing causes fibrous tissue formation rather than direct bone apposition, classically resulting in fibrous encapsulation.

Question 4

Which of the following best describes the role of tenting screws in GBR procedures?

Accepted Answer

They maintain space under the membrane to allow blood clot stabilization and bone fill

Answer

Tenting screws prevent membrane collapse, preserving the protected space beneath that allows undisturbed clot organization and subsequent bone formation.

Question 5

A 58-year-old patient who received IV bisphosphonate therapy for metastatic cancer requires an implant. According to current guidelines, what is the most appropriate recommendation?

Accepted Answer

Implant placement is contraindicated due to high MRONJ risk

Answer

IV bisphosphonates carry a significantly higher MRONJ risk than oral forms, making implant placement generally contraindicated in these patients.

(CIT) Certified Implantology Technician Practice Test

(CIT) Certified Implantology Technician Practice Test

CIT CIT Bone Grafting & Osseointegration 5