抄録
A case treated with subantral augmentation without grafting materials, in which bone augmentation was postoperatively confirmed using x-ray examination, was reported.
Case: A 45-year-old man who complained of pain in 2 when drinking cold water, visited our institute on Jan.19, 1989. On Oct. 6, he complained about a swelling of the gingiva and had a feeling that foreign matter was present in 5. Present findings showed missing teeth of 6 and 7, and an extention bridge on 4 and 5. X-ray examination indicated that there was a fracture of a distal part of the root in 5 and the right sinus bottom line located near the apex of the roots. The atrophy of alveolar ridge in 6 and 7 was remarkable. Treatment: On May 27, 1990,5 was extracted. The right side of the maxillary sinus was opened, and after lifting up the sinus mucosa, screw vent dental implants of 10 mm in size were inserted at 6 and 8. The gingival flap was sutured. Panoramic radiograph soon after operation showed the amount of bone to be 5 mm at the menial part of the implant and 7 mm at the distal part. The radiograph on Nov.6 (23 weeks later),showed bone augmentation increased by 4 mm at the mesial part and 2 mm at the distal part of the implant.
Discussion and summary: The case suggests that the maxillary sinus is fundamentally an organ having osteogenetic activity. It is important when considering the mechanism of new bone formation in the maxillary antrum.
