Lee Kyung-Shil, Kwon Young-Hyuk, Herr Yeek, Shin Seung-Il, Lee Ji-Yeon, Chung Jong-Hyuk
Department of Periodontology, Kyung Hee University School of Dentistry, Seoul, Korea.
J Periodontal Implant Sci. 2010 Dec;40(6):283-8. doi: 10.5051/jpis.2010.40.6.283. Epub 2010 Dec 31.
The aim of this case report is to present a case of incomplete bone formation after sinus augmentation.
A patient having alveolar bone resorption of the maxillary posterior edentulous region and advanced pneumatization of the maxillary sinus was treated with sinus elevation using deproteinized bovine bone in the Department of Periodontology, Kyung Hee University School of Dentistry and re-evaluated with computed tomography (CT) follow-up.
Even though there were no significant findings or abnormal radiolucency on the panoramic radiograph, incomplete bone formation in the central portion of the augmented sinus was found fortuitously in the CT scan. The CT scan revealed peri-implant radiolucency in the apical portion of the implant placed in the augmented maxillary sinus. Nevertheless, the dental implants placed in the grafted sinus still functioned well at over 15 months follow-up.
The result of this case suggests that patients who received maxillary sinus augmentation may experience incomplete bone formation. It is possible that 1) osteoconductive graft material with poor osteogenic potential, 2) overpacking of graft material that restricts the blood supply, and 3) bone microbial contamination may cause the appearance of incomplete bone formation after sinus augmentation. Further studies are needed to elucidate the mechanism of this unexpected result and care must be taken to prevent it.
本病例报告旨在呈现一例上颌窦提升术后骨形成不全的病例。
一名上颌后牙区牙槽骨吸收且上颌窦气化严重的患者，在庆熙大学牙科学院牙周病科接受了使用脱蛋白牛骨进行的上颌窦提升治疗，并通过计算机断层扫描（CT）随访进行重新评估。
尽管全景片上未发现明显异常或透射线，但在CT扫描中偶然发现上颌窦提升区中央部分骨形成不全。CT扫描显示，植入上颌窦提升区的种植体根尖部存在种植体周围透射线。然而，在移植窦内植入的牙种植体在超过15个月的随访中仍功能良好。
本病例结果表明，接受上颌窦提升术的患者可能会出现骨形成不全。可能是1）骨生成潜力差的骨传导性移植材料，2）移植材料过度填充限制了血液供应，以及3）骨微生物污染导致上颌窦提升术后出现骨形成不全。需要进一步研究以阐明这一意外结果的机制，并且必须注意预防。
