Dental Advanced Topics 2 — Questions and Answers
Question 1: Which guided tissue regeneration membrane is resorbable and does not require a second surgery for removal?
- Collagen membrane (Correct answer)
- Expanded PTFE (e-PTFE)
- Titanium mesh
- Dense PTFE
Correct answer: Collagen membrane
Collagen membranes are resorbable and are broken down by the body, eliminating the need for a removal procedure.
Question 2: In endodontics, what is the primary purpose of using sodium hypochlorite during root canal therapy?
- Tissue dissolution and disinfection (Correct answer)
- Sealing the apex
- Lubricating files
- Bleaching the crown
Correct answer: Tissue dissolution and disinfection
Sodium hypochlorite dissolves organic tissue and disinfects the canal system during instrumentation.
Question 3: Which classification describes a furcation defect with through-and-through bone loss between roots?
- Glickman Grade III (Correct answer)
- Glickman Grade I
- Miller Class I recession
- Kennedy Class II
Correct answer: Glickman Grade III
Glickman Grade III furcation involvement is a complete through-and-through bone loss between roots.
Question 4: What is the minimum recommended residual ridge height generally needed for standard implant placement without augmentation in the posterior mandible?
- About 10 mm above the inferior alveolar nerve (Correct answer)
- About 2 mm
- About 30 mm
- About 5 mm with no safety margin
Correct answer: About 10 mm above the inferior alveolar nerve
Roughly 10 mm of bone height allows a standard implant with a safe margin above the inferior alveolar canal.
Question 5: Which material is most commonly used as an apical barrier in apexification of an immature permanent tooth?
- Mineral trioxide aggregate (MTA) (Correct answer)
- Amalgam
- Composite resin
- Zinc oxide eugenol
Correct answer: Mineral trioxide aggregate (MTA)
MTA provides a biocompatible apical barrier promoting hard tissue formation in immature teeth.
Question 6: During a sinus lift procedure, perforation of which membrane is the most common complication?
- Schneiderian membrane (Correct answer)
- Tympanic membrane
- Periodontal membrane
- Basement membrane of skin
Correct answer: Schneiderian membrane
The Schneiderian membrane lines the maxillary sinus and is most often perforated during sinus augmentation.
Question 7: What is the recommended management of a tooth with a vertical root fracture?
- Extraction of the tooth or affected root (Correct answer)
- Root canal retreatment alone
- Fluoride application
- Observation only
Correct answer: Extraction of the tooth or affected root
Vertical root fractures generally have a poor prognosis, so extraction or root resection is usually indicated.
Dental Advanced Topics 2
Which guided tissue regeneration membrane is resorbable and does not require a second surgery for removal?