Fixed Prosthodontics - Mcqs

B) Prevent root fracture Explanation: A 1.5–2 mm ferrule of sound tooth structure above the crown margin resists horizontal fracture of the root. Q3. Which pontic design is best for hygiene in the mandibular posterior region? A) Ridge lap B) Modified ridge lap C) Sanitary (hygienic) D) Ovate

C) Sanitary Explanation: Sanitary pontic has no ridge contact, easy to clean; ovate is more esthetic but requires soft tissue concavity. Q4. Which cement is most commonly used for final cementation of all-ceramic crowns? A) Zinc phosphate B) Glass ionomer C) Resin-modified glass ionomer D) Resin cement (with adhesive system) fixed prosthodontics mcqs

A) Chamfer Explanation: Chamfer provides adequate bulk of metal at margin + good retention; shoulder weakens metal margin; knife-edge is least retentive. Q2. The primary purpose of a ferrule in crown preparation is: A) Esthetics B) Prevent root fracture C) Reduce tooth sensitivity D) Improve retention of provisional B) Prevent root fracture Explanation: A 1

D) Resin cement Explanation: All-ceramic restorations (especially E-max) bond via resin cements to improve fracture resistance. Q5. A non-rigid connector in a fixed bridge is indicated when: A) Abutments are periodontally weak B) Pier abutment is present C) Bridge span is short D) Porcelain margin is used A) Ridge lap B) Modified ridge lap C)