Implants

Question 1

While placing a threaded endosseous implant, there is 6 mm of the threaded buccal surface exposed. The most appropriate treatment is to:
(A) place a shorter implant.
(B) graft the exposed threads of the implant with autogenous bone.
(C) cover the exposed threads of the implant with a collagen membrane.
(D) close the incision via a periosteal releasing incision.

Answer 1

(B) graft the exposed threads of the implant with autogenous bone.

COMSSAT: 2019
Explanation:
Source: Block, M. (1999). Atlas of the oral and maxillofacial surgery clinics of north America, 7(2), (pp. 95-107).

Question 2

When treatment planning the zygomatic (Zygomaticus) implant, which of the following requirements must be met?
(A) Posterior wall of the maxillary sinus must be at least 4 mm thick
(B) Ability to place two anterior maxillary conventional implants
(C) Minimum of 10 mm of thickness of the body of the zygoma
(D) Minimum of 42 mm between the two zygomatic implants

Answer 2

(B) Ability to place two anterior maxillary conventional implants

COMSSAT: 2019
Explanation:
Source: Management of vertical defects for implant reconstruction (2006). Selected readings in oral and maxillofacial surgery, 14(3). Jacksonville, FL: Walter Lorenz Surgical Instruments.

Question 3

Which adjunctive implant surgical technique would optimally address a 15 mm vertical deficiency of bony and soft tissues in the anterior maxillary alveolus?
(A) Insertion of hydroxylapatite blocks using a tunneling technique
(B) Distraction osteogenesis
(C) Onlay bone grafting
(D) Subepithelial grafting

Answer 3

(B) Distraction osteogenesis

COMSSAT: 2019
Explanation:
Source: Erkut, S. & Uckan, S. (2006). Links alveolar distraction osteogenesis and implant placement in a severely resorbed maxilla: a clinical report. Journal of prosthetic dentistry, (95(5), (pp. 340-343).

Question 4

Connective tissue grafts are less predictable if performed at the time of:
(A) extraction.
(B) cortico-cancellous grafting. 
(C) implant placement.
(D) implant uncovering.

Answer 4

(B) cortico-cancellous grafting.

COMSSAT: 2019
Explanation:
Source: Block, M. (1999). Atlas of the oral and maxillofacial surgery clinics of north America, 7(2), (pp. 95-107).

Question 5

When performing a ridge splitting technique to expand the edentulous ridge for insertion of an interpositional bone graft prior to implant placement, what is the preferred preoperative minimum
ridge width?
(A) 1 mm 
(B) 2 mm 
(C) 3 mm 
(D) 4 mm

Answer 5

(C) 3 mm

COMSSAT: 2019
Explanation:
Source: Block, M. (1999). Atlas of the oral and maxillofacial surgery clinics of north America, 7(2), (pp. 95-107).

Question 6

For a subantral osseous augmentation, non-resorbable HA can be added to autogenous bone in order to:
(A) add bulk to the graft.
(B) improve initial implant stability. 
(C) decrease infection rate.
(D) improve osteogenesis.

Answer 6

(A) add bulk to the graft.

COMSSAT: 2019
Explanation:
Source: Block, M. (1999). Atlas of the oral and maxillofacial surgery clinics of north America, 7(2), (pp. 95-107).

Question 7

Following anterior tooth removal, how long does it take to get 3-4 mm of both buccal-lingual and apico-coronal ridge resorbtion?
(A) 1 month 
(B) 3 months 
(C) 6 months 
(D) 1 year

Answer 7

(C) 6 months

COMSSAT: 2019
Explanation:
Source: Management of vertical defects for implant reconstruction (2006). Selected readings in oral and maxillofacial surgery, 14(3). Jacksonville, FL: Walter Lorenz Surgical Instruments.

Question 8

In harvesting subepithelial connective tissue grafts, the advantage of a dual incision is:
(A) graft thickness is defined by the second incision.
(B) it allows for primary closure.
(C) donor site pain is uncommon.
(D) a dressing is rarely needed at the donor site.

Answer 8

(A) graft thickness is defined by the second incision.

COMSSAT: 2019
Explanation:
Source: Block, M. (1999). Atlas of the oral and maxillofacial surgery clinics of north America, 7(2), (pp. 95-107).

Question 9

Antibiotic therapy in dental implant surgery:
(A) eliminates postoperative infection.
(B) decreases incidence of early peri-implantitis.
(C) reduces integration time of implants.
(D) decreases the failure rate of implants.

Answer 9

(D) decreases the failure rate of implants.

COMSSAT: 2019
Explanation:
Source: Ata-Ali, J. (2014). Do antibiotics decrease implant failure and postoperative infections? A systematic review and meta-analysis. International journal of oral and maxillofacial surgery, 43, (pp. 68-74).

Question 10

Which of the following is most important for implant health over time?
(A) Adequate volume of good quality soft tissue
(B) Osseointegration
(C) Adequate inter-occlusal space
(D) Adequate bone graft consolidation

Answer 10

(B) Osseointegration

COMSSAT: 2019
Explanation:
Source: Block, M. (1999). Atlas of the oral and maxillofacial surgery clinics of north America, 7(2), (pp. 95-107).