What is the primary use of periodontal knives?

• A. Root planing
• B. Gingivectomy
• C. Bone grafting
• D. Flap elevation

Answer: (B)

Periodontal knives are specifically designed for surgical procedures that involve the gingiva. Their primary use is during gingivectomy, which is a surgical procedure aimed at removing and reshaping the gum tissue. This technique is often necessary in cases of gingival hyperplasia, periodontal disease, or for establishing a more favorable posture of the gum tissue.

The design of a periodontal knife facilitates precise incisions in the soft tissue, allowing for clean removal of the excess gum tissue without significant trauma to the surrounding areas. This precision is crucial in achieving optimal healing outcomes and aesthetic results post-surgery.

While the other options involve important periodontal procedures, they do not align with the primary function of periodontal knives. For instance, root planing is focused on the thorough cleaning of the root surfaces to remove calculus and toxins, typically requiring instruments designed for scaling rather than knives. Bone grafting procedures utilize different instruments and techniques to manipulate bone and grafting materials. Flap elevation relies on different surgical tools that are more suited for lifting soft tissue flaps rather than the excision and shaping capabilities of a periodontal knife.