Restorative & Materials · single question
Sodium perborate, when used in dentistry for internal (non-vital) tooth bleaching, primarily functions to:
Show answer and explanation
Correct answer: B. Achieve a better shade match (bleaching action)
B) Better shade match (bleaching action) — CORRECT.
Sodium perborate is an oxidizing agent used in INTERNAL BLEACHING (walking bleach technique) for non-vital (endodontically treated) teeth. When moistened, it releases hydrogen peroxide which oxidizes chromogenic compounds within the dentin, lightening the tooth's color. It is sealed within the pulp chamber between appointments.
A) Arresting decay: Sodium perborate has no cariostatic action; fluoride compounds arrest decay.
C) Strengthening enamel: Fluoride strengthens enamel through remineralization — not sodium perborate.
D) Desensitizing dentin: Not a function of sodium perborate.
Sodium perborate is an oxidizing agent used in INTERNAL BLEACHING (walking bleach technique) for non-vital (endodontically treated) teeth. When moistened, it releases hydrogen peroxide which oxidizes chromogenic compounds within the dentin, lightening the tooth's color. It is sealed within the pulp chamber between appointments.
A) Arresting decay: Sodium perborate has no cariostatic action; fluoride compounds arrest decay.
C) Strengthening enamel: Fluoride strengthens enamel through remineralization — not sodium perborate.
D) Desensitizing dentin: Not a function of sodium perborate.
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