INBDE (Integrated National Board Dental Examination) Practice Exam

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What type of collagen is predominant for connective tissue (CT) and PDL fibers?

  1. Type I

  2. Type II

  3. Type III

  4. Type IV

The correct answer is: Type I

Collagen is a major component of connective tissue (CT) and periodontal ligament (PDL) fibers, providing strength and structure. Out of the four types of collagen, type I is the most abundant and predominant in these tissues. Type II collagen is mainly found in cartilage, making option B incorrect. Type III collagen is commonly found in skin and blood vessels, making option C incorrect. Type IV collagen is primarily found in the basement membrane, which separates tissues and organs, making option D incorrect. Overall, type I collagen is the correct answer because it is the main type of collagen that is present in connective tissue and periodontal ligament fibers.

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