Seike Takuya, Hashimoto Ichiro, Matsumoto Kazuya, Tanaka Eiji, Nakanishi Hideki
Department of Plastic and Reconstructive Surgery, Institute of Health Biosciences, the University of Tokushima Graduate School, Tokushima, Japan.
J Med Invest. 2012;59(1-2):152-65. doi: 10.2152/jmi.59.152.
Alveolar bone grafting is a standard procedure used to achieve good occlusion for both functional and aesthetic purposes in patients with cleft lip and palate. At the past, main methods used to evaluate bone bridge formation after bone grafting are radiographs, such as dental, occlusal, and panoramic.
To evaluate bone bridge both qualitatively and quantitatively, we used CT scans (conventional and QCT). Quantitative computed tomography (QCT) has previously been used for measuring bone mineral density of the lumbar vertebrae.
The study comprised 26 male and 15 female patients who underwent alveolar bone grafting. We analyzed bone bridge with regard to four factors: marginal bone level, vertical height, anteroposterior bone width and bone mineral density using dental radiographs, and CT scans such as conventional and QCT. The clinical results of orthodontic treatment were evaluated more than 2 years postoperatively.
Orthodontic treatment was considered to be successful when the bone bridge satisfied the following criteria: marginal bone level >= 3, vertical height >= 6.5 mm, anteroposterior bone width >= 5 mm, and bone mineral density < 350 mg Ca(5) (PO(4)) OH/mL.
we could predict the prognosis of patients' orthodontic treatment in early stage after bone grafting.
牙槽骨移植是一种标准手术，用于唇腭裂患者实现良好的咬合，以达到功能和美观目的。过去，用于评估骨移植后骨桥形成的主要方法是X光片，如牙片、咬合片和全景片。
为了定性和定量评估骨桥，我们使用了CT扫描（传统CT和定量CT）。定量计算机断层扫描（QCT）此前已用于测量腰椎的骨密度。
该研究包括26名男性和15名女性患者，他们接受了牙槽骨移植。我们使用牙片以及传统CT和QCT等CT扫描，从四个因素分析骨桥：边缘骨水平、垂直高度、前后骨宽度和骨密度。术后2年以上评估正畸治疗的临床结果。
当骨桥满足以下标准时，正畸治疗被认为是成功的：边缘骨水平≥3，垂直高度≥6.5毫米，前后骨宽度≥5毫米，骨密度<350毫克Ca(5)(PO(4))OH/毫升。
我们可以在骨移植后的早期预测患者正畸治疗的预后。
