种植钉前方牵引时上颌骨骨质条件的CBCT研究  

A study on the bone conditions of the maxilla in protraction with micro-implant anchorage by CBCT

作　　者：孟耀[1] 刘曼 邓倩楠 周佳[1] MENG Yao;LIU Man;DENG Qiannan;ZHOU Jia(Depavtment of Orthodontics,Shenzhen Children’s Hospital,Shenzhen 518020,Guangdong Province,China;Medical Technic&Nursing School,Shenzhen Polytechnic)

机构地区：[1]深圳市儿童医院口腔正畸科,广东深圳518020 [2]深圳市职业技术学院医学技术及护理学院

出　　处：《西南医科大学学报》2020年第3期268-271,共4页Journal of Southwest Medical University

基　　金：深圳市科技创新委员会基础研究项目(JCYJ20180228164959104)。

摘　　要：目的:通过青少年Ⅲ类错种植钉前牵引成功病例的CBCT分析,探讨上颌骨密度、厚度与稳定种植钉的关系。方法:选取前牵引种植钉植入成功与植入失败病例各20例分为实验组和对照组。对种植钉植入前后CBCT资料运用NNT软件对双侧上颌皮质骨密度、松质骨密度和颌骨厚度进行测量分析。结果:实验组皮质骨密度为(1 078±280.5)HU、松质骨密度为(395.4±149.6)HU、骨厚度为(6.4±1.3)mm,对照组皮质骨密度为(764.0±180.4)HU、松质骨密度为(356.4±164.2)HU、骨厚度为(3.9±1.4)mm,实验组和对照组相比皮质骨密度和骨厚度均差异有统计学意义(P <0.05),松质骨密度无差异(P>0.05)。结论:青少年Ⅲ类错前牵引种植钉植入成功的病例其皮质骨密度和骨厚度均高于对照组。提示对青少年实施种植钉植入前应分析研究CBCT,以提高植入成功率。Objective:To explore the relationship between stable micro-implant anchorage and the bone thickness and density by analyzing the cone-beam computed tomography(CBCT)data of the adolescents with class Ⅲ malocclusion who underwent successful micro-implant anchorage implantation for maxillary protraction. Methods:A total of 20 patients with successful anchorage implantation for maxillary protraction were selected as experimental group,and 20 patients with failed implantation as control group. The density of the cortical bone and cancellous bone and the thickness of the maxilla on both sides before and after the implantation were measured and analyzed using NNT software based on the data of CBCT. Results:In the experimental group,the density of the cortical bone was(1 078 ± 280.5)HU,the density of the cancellous bone was(395.4 ± 149.6)HU,and the bone thickness was(6.4 ± 1.3)mm;in the control group,the density of the cortical bone was(764.0 ± 180.4)HU,the density of the cancellous bone was(356.4 ± 164.2)HU,and the bone thickness was 3.9 ± 1.4 mm. There were significant differences in the density of the cortical bone and the bone thickness between the experimental group and the control group(P <0.05),while no significant difference was found in the density of the cancellous bone. Conclusion:The cortical bone density and thickness of the maxilla are significantly higher in the adolescents with class Ⅲ malocclusion who have successful micro-implant anchorage implantation for maxillary protraction than in those with failed implantation,which suggests that CBCT data should be analyzed and studied before the micro-implant anchorage implantation in adolescents,in order to reduce the risk of failure and increase the success rate of implantation.

关 键 词：骨性Ⅲ类错 种植钉 锥形束计算机体层摄影术 骨密度 骨厚度 

分 类 号：R783.5[医药卫生—口腔医学]