INBDE (Integrated National Board Dental Examination) Practice Exam

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Internal/reverse bevel, crevicular, and interdental cuts are involved in which type of flap?

  1. Full thickness flap

  2. Partial thickness flap

  3. Free gingival flap

  4. Modified Widman flap

The correct answer is: Full thickness flap

Internal/reverse bevel, crevicular, and interdental cuts are techniques used in a full-thickness flap design. In a full-thickness flap, the entire thickness of the soft tissue (mucosa and periosteum) is elevated from the underlying bone, allowing better visibility and access to the surgical site. By incorporating internal/reverse bevel, crevicular, and interdental cuts, the flap can be raised with precision, preserving blood supply for improved healing post-surgery. Option B (Partial thickness flap) involves raising only the epithelial and a portion of the underlying connective tissue layer, leaving the periosteum intact. This type of flap is often used in procedures where preservation of the blood supply and soft tissue attachment is crucial. Option C (Free gingival flap) involves the elevation of only the epithelial layer, specifically from the underlying connective tissue layer. This technique is commonly used to increase the amount of attached gingiva in a specific area. Option D (Modified Widman flap) is a surgical procedure designed for periodontal therapy, involving the removal of diseased soft tissue and recontouring of the bone and soft tissue to facilitate better oral hygiene maintenance. Therefore, the correct answer is A.