#MCQ 10 - In Orthodontics, Porcelain brackets have better esthetics as compared to stainless steel brackets. However, a major disadvantage is:

A. Stains over time

B. Require special debonding agents

C. Removing is difficult and causes enamel cracks

D. Channel microfraction while debonding

Answer: Removing is difficult and causes enamel cracks

"Ceramic brackets are more difficult to debond than steel brackets, and wing fractures may occur easily during debracketing." - Graber

Drawbacks of Ceramic Brackets:

1. The frictional resistance between orthodontic wire and ceramic brackets is greater and less predictable than it is with steel brackets. This unpredictability makes determining optimal force levels and anchorage control difficult. Ceramic brackets with a steel slot insert to reduce friction are therefore more reliable for clinical purposes.

2. Ceramic brackets are not as durable as steel brackets and are brittle by nature. These brackets may break during orthodontic treatment, particularly when full size (or close to full size) stainless steel archwires are used for torquing purposes.

3. Ceramic brackets are harder than steel and rapidly induce enamel wear of any opposing teeth.

4. Ceramic brackets are more difficult to debond than steel brackets, and wing fractures may occur easily during debracketing.

5. The added bulk required to provide adequate strength makes oral hygiene more difficult.

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