ABP Surgical Procedures 2 — Questions and Answers
Question 1: Which suture material is most appropriate for closing periodontal flaps due to its handling characteristics and controlled resorption?
- 4-0 silk
- 4-0 polyglycolic acid (Correct answer)
- 3-0 nylon
- 5-0 chromic gut
Correct answer: 4-0 polyglycolic acid
Polyglycolic acid (Vicryl) sutures offer excellent knot security, predictable resorption over 3–4 weeks, and minimal tissue reaction, making them ideal for periodontal flap closure.
Question 2: During an osseous resective surgery, a 'positive architecture' refers to which bone configuration?
- Interdental bone higher than radicular bone (Correct answer)
- Radicular bone higher than interdental bone
- Flat bone crest across all surfaces
- Presence of crater defects between teeth
Correct answer: Interdental bone higher than radicular bone
Positive architecture describes a configuration where interdental bone is coronal to radicular bone, which is physiologically normal and the goal of osseous recontouring.
Question 3: The 'critical zone' of keratinized tissue recommended to maintain around implants is generally considered to be at least:
- 1 mm
- 2 mm (Correct answer)
- 4 mm
- 6 mm
Correct answer: 2 mm
A minimum of 2 mm of keratinized mucosa around implants is widely recommended to facilitate plaque control and reduce peri-implant inflammation.
Question 4: In a papilla preservation flap technique, the primary advantage over a conventional flap is:
- Greater surgical access to furcation areas
- Reduced postoperative pain
- Preservation of interdental papilla for better esthetics and closure (Correct answer)
- Faster healing due to smaller incision
Correct answer: Preservation of interdental papilla for better esthetics and closure
Papilla preservation flaps are designed to maintain the interdental papilla intact, which improves wound closure and esthetic outcomes, particularly in the anterior region.
Question 5: When performing a gingivectomy, the external bevel incision is made at what angle to the long axis of the tooth?
- 90 degrees
- 45 degrees (Correct answer)
- 20 degrees
- 10 degrees
Correct answer: 45 degrees
The external bevel incision in gingivectomy is directed at approximately 45 degrees to the tooth's long axis, creating a thin, tapered tissue margin.
Question 6: Which of the following best describes the rationale for using a periodontal dressing (pack) after surgery?
- Promotes faster bone regeneration
- Protects the wound and aids patient comfort during healing (Correct answer)
- Prevents bacterial colonization entirely
- Stimulates keratinization of the surgical site
Correct answer: Protects the wound and aids patient comfort during healing
Periodontal dressings protect the surgical wound from mechanical trauma and irritants, reducing discomfort without providing antibacterial sterilization.
Question 7: A modified Widman flap differs from a full-thickness mucoperiosteal flap primarily in that it:
- Does not reflect the periosteum
- Uses a split-thickness elevation only in the papillary region
- Employs an inverse bevel incision with minimal tissue removal and intimate flap adaptation (Correct answer)
- Requires removal of the junctional epithelium only
Correct answer: Employs an inverse bevel incision with minimal tissue removal and intimate flap adaptation
The modified Widman flap uses an inverse bevel incision to excise the pocket epithelium while preserving maximum bone coverage and allowing close flap readaptation.
ABP Surgical Procedures 2
Which suture material is most appropriate for closing periodontal flaps due to its handling characteristics and controlled resorption?