What is the purpose of an alveolar bone graft in cleft lip/palate patients?

• A. To support eruption of permanent maxillary canine and stabilize the anterior dentition.
• B. To improve facial symmetry by reshaping the cheekbones.
• C. To enhance nasal airway.
• D. To reduce the need for orthodontic expansion.

Answer: (C)

The main idea is that an alveolar bone graft provides a bony foundation across the cleft to support tooth eruption and stabilize the maxillary dental arch. In mixed dentition, performing the graft—typically before the eruption of the permanent maxillary canine—creates continuity of the alveolar ridge so the canine can erupt through bone and receive proper periodontal support. This graft also helps support the adjacent teeth and makes orthodontic planning more stable by providing a solid base for alignment across the cleft.

While it can influence surrounding structures and may indirectly affect nasal base contour and esthetics, the primary purpose is not to improve nasal airway. The option about nasal airway is more of a secondary or indirect benefit and not the central reason for the graft. Other choices aren’t the main aim because reshaping cheekbones isn’t achieved by this procedure, and reducing the need for orthodontic expansion isn’t guaranteed—orthodontic treatment often remains necessary to achieve optimal alignment.