INBDE (Integrated National Board Dental Examination) Practice Exam

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Ace your INBDE with our comprehensive practice exam. Featuring detailed explanations, interactive flashcards, and a wide array of multiple-choice questions designed to mirror the real test. Get ready to surpass your expectations!

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Which of the following principal fibers in the PDL make up the largest group of fibers and help in bearing vertical masticatory forces?

Transseptal
Horizontal
Oblique
Apical

The correct answer is: Oblique

The oblique group of fibers is the largest group of fibers in the periodontal ligament (PDL). These fibers are arranged in an oblique direction and are able to withstand and distribute vertical masticatory forces, protecting the teeth from damage. The transseptal, horizontal, and apical groups of fibers also play important roles in anchoring the teeth and maintaining their position, but they are not as specialized for bearing vertical masticatory forces as the oblique fibers. Therefore, these options are incorrect.