Alveolar Ridge Bone Augmentation Using Carbonate Apatite Granules as a Novel Bone Substitute for Orthodontic Tooth...

Orthodontic tooth movement (OTM) into severe alveolar bone defects is challenging, and alveolar bone augmentation is often required before OTM. However, few reports have been published regarding the augmentation with bone substitutes for OTM other than autologous bone. This report demonstrates that OTM into the previously augmented bone area with novel carbonate apatite (CO₃Ap) granules as a novel bone substitute is possible and safe. Six months after bone augmentation with CO₃Ap granules in the area of a severe alveolar bone defect, we confirmed sufficient new bone formation. Then, OTM into the augmented area was started. Clinical follow-up showed favorable tooth movement into the augmented area. Radiographic examination confirmed that the grafted granules were resorbed and replaced by new bone as the teeth moved, and adequate bone volume was present around the root after tooth movement. No abnormal root resorption was observed. No abnormal gingiva around the moved tooth was observed. The periodontal ligament space was maintained, and bony adhesion was not observed. OTM into the previously augmented bone area with CO₃Ap granules was clinically successful. Bone augmentation with CO₃Ap granules in severe alveolar bone defects is considered to be a safe and effective method for the subsequent OTM.