INBDE (Integrated National Board Dental Examination) Practice Exam

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Prepare for the INBDE (Integrated National Board Dental Examination) exam. Study with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

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What is the initiator compound in self-cure composite?

  1. Camphorquinone

  2. Benzoyl peroxide

  3. Tertiary amines

  4. HEMA

The correct answer is: Benzoyl peroxide

Benzoyl peroxide is the initiator compound in self-cure composite materials. Initiator compounds are responsible for initiating the polymerization reaction in composites. In self-cure composites, benzoyl peroxide decomposes when mixed with the catalyst and accelerates the polymerization process by generating free radicals. These free radicals help in linking the monomer molecules together to form the polymer network. This process is crucial for the setting and hardening of the composite material. Camphorquinone (A) and tertiary amines (C) are components of light-cure composite materials, where the polymerization reaction is initiated by a blue light source activating the camphorquinone. HEMA (D) is a monomer commonly found in dental adhesives but is not an initiator compound in composite materials.

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