Question

A dentist bonded a composite resin restoration on a maxillary anterior tooth. Which of the following bonded abrasives would provide the most durable and optimal polishing outcome?

• A. Rubber
• B. Resin
• C. Sintered
• D. Vitreous

Hint:

Sintered abrasives are highly durable and maintain efficiency, making them ideal for precision polishing of restorative materials.

Answer 1

The Correct Option is C

Step 1: Understanding bonded abrasives.
Bonded abrasives are classified based on the material that binds the abrasive particles togetherThe nature of the bond affects durability, cutting efficiency, and polishing quality
Step 2: Requirements for polishing composite resin.
Composite restorations in anterior teeth require high surface smoothness, gloss retention, and durabilityThe abrasive must maintain its shape, resist wear, and provide uniform polishing without disintegration
Step 3: Evaluation of options.
(A) Rubber bond: Flexible and useful for finishing but less durable for long-term polishing precision
(B) Resin bond: Offers moderate strength but may wear faster under continuous use
(C) Sintered bond: Produced by heat fusion of abrasive particlesIt is strong, durable, and maintains cutting efficiencyProvides superior and long-lasting polishing results
(D) Vitreous bond: Hard and brittle, more commonly used in grinding rather than fine polishing of composites
Step 4: Conclusion.
Sintered bonded abrasives provide the most durable and optimal polishing outcome for composite resin restorations