锥形束CT检测成人腭部微种植体植入的安全区域

Safe zones of palate for mini-implant insertion in adults by cone beam computed tomography

目的运用锥形束CT（cone beam computed tomography,CBCT）测量腭部骨厚度,分析腭部微种植体植入的安全区域。方法选取我院2011-2013年收治的103例20-40岁成人（男性49例,女性54例）CBCT影像数据,导入Invivo 5.0软件重建,测量腭部28个点位的骨厚度值。使用SPSS 20.0软件对测量值进行统计学分析,根据分析结果绘制腭部骨厚度分布图。结果各测量点位中腭部骨厚度最大值为（11.90±2.73）mm,最小值为（1.53±0.98）mm,其中21个测量点位的腭部骨厚度男女间差异显著（P〈0.05,P〈0.01）。除腭中缝区外,腭部骨厚度有向后方递减的趋势。腭部微种植体植入安全区域位于腭中缝区及腭旁侧区前部。结论腭中缝区及腭旁侧区前部适合作为成人腭部微种植体支抗植入部位。

Objective To measure the bone thickness of the palatal areas by cone beam computed tomography（CBCT）,and analyze the safe zones of the palate to place mini-implants. Methods CBCT data of103 adults（49 men and 54 women,20 to 40 years old） in our hospital from 2011 to 2013 were selected and reconstructed by Invivo 5. 0 software. The palatal bone thickness was measured at 28 sites. After the statistical analysis using SPSS 20. 0,maps of palatal bone thickness distribution were made. Results The maximum value of palatal bone thickness was 11. 90 ± 2. 73 mm,and the minimum value was 1. 53 ± 0. 98 mm. Significant differences were observed between the male and female groups at 21 sites（ P〈 0. 05,P〈 0. 01）. The thickness of palatal bone tended to decrease posteriorly,except for the midpalatal suture. The safe zones of the palate for mini-implant insertion were located at the midpalatal suture and the anterior region of the paramedian palate. Conclusion The midpalatal suture and the anterior region of the paramedian palate are suitable for mini-implant insertion in adults.