Which technique is used to promote bone growth in the posterior mandibular area?

• A. Distraction Osteogenesis
• B. Sinus Augmentation
• C. Guided Bone Regeneration
• D. Autograft Grafting

Answer: (A)

Distraction osteogenesis promotes new bone formation by gradually separating bone segments after a corticotomy. In the posterior mandible, this controlled, gradual distraction stimulates the body's own bone to fill the widening gap, producing vertically augmented bone that can support implants. It leverages the native bone's capacity to regenerate, often yielding robust, well-vascularized bone while also letting soft tissue stretch and adapt alongside the regenerating bone. This approach minimizes the need for harvesting large grafts from another site, reducing donor-site morbidity and avoiding some resorption issues seen with grafts.

Sinus augmentation targets the maxillary sinus floor, not the mandible, so it isn’t applicable here. Guided bone regeneration can help with smaller or horizontal defects but is less reliable for substantial vertical gains in the posterior mandible. Autograft grafting involves harvesting bone from another site and can carry donor-site morbidity and unpredictable resorption, making it less elegant for significant vertical augmentation in this area.