上颌中切牙间微种植体植入可靠性的CBCT测量研究  

The reliability of orthodontic mini-implant placement between the maxillary central incisors assessed by cone beam computed tomography

作　　者：许远[1] 王林[2] 唐伟成[1] 束为[1] 赵春洋[2] XU Yuan;WANG Lin;TANG Weicheng;SHU Wei;ZHAO Chunyang(Department of Stomatology,Jiangsu Province Hospital of Chinese Medicine,Nanjing 210029,China)

机构地区：[1]江苏省中医院口腔科,江苏南京210029 [2]南京医科大学附属口腔医院正畸科,江苏省口腔疾病研究重点实验室,江苏省口腔转化医学工程研究中心,江苏南京210029

出　　处：《口腔医学》2021年第8期715-719,共5页Stomatology

基　　金：国家自然科学基金(81830031);江苏省高校优势学科建设工程项目(2018-87);科教强卫口腔正畸学(ZDXKA2016026)。

摘　　要：目的通过锥形束CT(CBCT)测量分析,研究上颌中切牙间微种植体植入区的唇舌向牙槽骨量,探讨合适的植入高度与角度。方法选取80例年龄12~25岁正常人的CBCT影像资料进行三维重建,矢状面测量上颌中切牙间在距离参考平面14.0、16.0、18.0、20.0 mm的四个植入高度上,分别以与骨皮质表面成60°、75°、90°的三个方向共12个植入路径的唇舌向骨质厚度。结果微种植体不同植入部位唇舌向骨质厚度均大于7.0 mm。相同植入高度,唇舌向骨量在植入角度为60°时最大,差异有统计学意义。大部分测量部位骨质厚度男性大于女性。结论上颌中切牙间可植入骨内长度为6 mm的微种植体,微种植体与牙槽骨表面呈60°斜行植入可获得更多的骨量,高度的选择则建议按临床需要及患者的软组织状况而定。Objective To measure the buccolingual alveolar bone thickness between the maxillary central incisors by using cone beam computed tomography and to explore the optimal insertion height and angle for orthodontic mini-implant placement.Methods Three-dimensional reconstruction was performed on CBCT images of 80 normal persons aged 12-25 years.For each subject,the buccolingual alveolar bone thickness of 12 insertion paths on the median sagittal plane was measured at four different levels of 14.0,16.0,18.0 and 20.0 mm from the reference plane and three angles of 60°,75°,and 90°with the surface of the cortical bone.Results Mean buccolingual alveolar bone thickness of every site was greater than 7 mm.At the same height level,the bone thickness was the largest at the angle of 60°,and the difference was statistically significant.Male had greater bone thickness than female at most sites.Conclusion The orthodontic mini-implant with 6 mm length in the bone can be placed between the maxillary central incisors.In clinical application,there has more alveolar bone with the insertion angle of 60°.The insertion height is recommended to be determined according to clinical needs and the patient’s soft tissue condition.

关 键 词：上颌中切牙 鼻腭管 微种植体 锥形束CT 

分 类 号：R783.5[医药卫生—口腔医学]