基于三维重建对牙种植骨移植材料的定量研究

Quantitative study on material of bone graft in dental implantation based on CT 3-D reconstruction

目的探讨基于Simplant软件三维重建对牙种植患者骨移植材料的定量评估。方法对9例牙种植修复Ⅰ期手术同期完成引导骨再生术的患者,在术后1周、3个月、6个月分别进行种植区螺旋CT扫描,对螺旋CT图像进行三维重建和数据分析,通过测量计算骨移植材料Bio-Oss在植入人体后不同时期的体积,以术后1周剩余体积为基线体积,计算其在术后3个月、6个月的剩余量,剩余量=复诊时剩余体积/基线体积×100%。结果通过测量、计算,得出Bio-Oss在术后3个月的剩余量为(52.49±7.03)%,术后6个月的剩余量为(30.00±8.35)%。结论三维重建评估发现牙种植修复引导骨再生术中所植入的骨移植材料Bio-Oss随时间延长有明显的吸收。

Objective The purpose of this study was to measure the absorbed quantity of material of bone graft （ Bio- Oss） by using the spiral CT scanning and measuring the variety of the volume of Bio-Oss. Methods Nine patients were preformed stage I surgery of dental implants and guided bone regeneration-membrane technique （GBR） simultaneously. These patients were scanned by spiral CT at the end of 1 -week, 3-month and 6-month after the operation day respectively. The measurements of the varied volume of Bio-Oss based on CT 3-D reconstruction with three times CT scanning were conducted. Finally the remains quantity of Bio-Oss in the patients＇ jaw bone was found. Results The results suggested that the remains quantity of Bio-Oss was 52.49% ±7.03% at the end of 3-month after the operative day and 30.00% ±8.35 % at the end of 6-month. Conclusion It is concluded that there is a decrease in the remains quantity of Bio-Oss in GBR along with the increase of time. Bone formation can be assessed in all three dimensions showing a high grade of resorption.