腭部种植体植入部位骨厚度的锥形束CT测量分析

Three Dimensional Evaluation of the Bone Thickness of the Implant Sites of Palatal Implants Using Cone Beam Compupted Tomography

目的研究腭部种植体植入的安全性。方法将34例18～35岁正畸患者的头颅锥形束CT扫描数据导入种植分析软件获得三维重建图像,测量腭部20个感兴趣部位的骨厚度,计算长度3.0mm和6.0mm种植体的可植入率,并行统计学分析。结果切牙孔后3.0mm距腭中线6.0mm处骨厚度值最大,为(8.7±2.7)mm,分别有94.1%、73.5%的个体适合植入长度3.0mm、6.0mm的种植体。只有在P6D0处(P=0.035)和P12D0处(P=0.040),骨厚度测量值的性别差异有统计学意义。结论腭部骨厚度变异大,腭正中区域适合植入短种植体,腭旁侧区域适合植入较长的种植体。

Objective To conduct quantitative research on the vertical bone thickness for implants placement using CBCT,and to investigate the safe placement of palatal implants.Methods Three-dimensional reformatting images were reconstructed with the selected CBCT scanning data of 34 patients,aging 18 to 35,by means of the EZ Implant software.The vertical bone thickness was measured at 20 interesting sites of palate.The thickest percentages of measurements that could support 3.0 mm and 6.0 mm length implants was calculated.The results were analyzed statistically.Results The greatest mean value of vertical bone thickness （8.7 mm） was located at 3.0 mm posterior to the incisive foramen and6.0 mm lateral to the midline,with 94.1% and 73.5% of the subjects meeting 3.0 mm and 6.0 mm length implants respectively.There was a significant difference in the vertical bone thickness of P6D0,P12D0 between men and women（P0.05）.A short palate implant should be implanted in the mid-palatal area;a longer palate implant should be implanted in the parapalatal area.Conclusion Evaluating the implant sites of palatal implant with CBCT would help the safe implantation to some extent.