Cakir-Ozkan Nilüfer, Ogütcen-Toller Melahat, Yilmaz Nergiz, Akan Hüseyin
Department of Oral and Maxillofacial Surgery, Dental Faculty of Ondokuz Mayis University, Samsun, Turkey.
J Craniofac Surg. 2006 May;17(3):492-6. doi: 10.1097/00001665-200605000-00018.
This study was conducted to show dimensional and volumetric changes after vertical alveolar distraction osteogenesis using a three-dimensional computed tomography measurement method.
Four patients with mandibular alveolar ridge atrophy were evaluated. Three-dimensional computed tomography reconstructions were obtained 2 weeks before and 3 months after the operation. The results of the three-dimensional computed tomography measurements were used for preoperative planning and for quantitative assessment of the mandibular alveolar distraction. The results of the preoperative and postoperative three-dimensional computed tomography measurements were compared statistically using paired t-test.
The increase in distracted mandibular segment volume and surface area, height, and width of each slice after distraction were statistically significant (P < 0.001).
In atrophic jaw cases, the dimensions of the present alveolar bone were clearly measured so that the amount of augmentation needed could be estimated. Three-dimensional computed tomography provided better understanding of the effects of distraction osteogenesis on the anterior mandible. Newly formed bone can be viewed as close to its real dimensions after distraction osteogenesis.
本研究旨在采用三维计算机断层扫描测量方法，展示垂直牙槽骨牵张成骨术后的尺寸和体积变化。
对4例下颌牙槽嵴萎缩患者进行评估。在手术前2周和术后3个月获取三维计算机断层扫描重建图像。三维计算机断层扫描测量结果用于术前规划和下颌牙槽骨牵张的定量评估。术前和术后三维计算机断层扫描测量结果采用配对t检验进行统计学比较。
牵张后下颌骨节段体积、表面积以及牵张后各层面的高度和宽度增加具有统计学意义（P < 0.001）。
在萎缩性颌骨病例中，能够清晰测量当前牙槽骨的尺寸，从而可以估计所需的增量。三维计算机断层扫描能更好地理解牵张成骨对下颌前部的影响。牵张成骨后新形成的骨可以被视为接近其实际尺寸。
