关于中国人正畸支抗用微种植钉牙槽骨植入安全区的研究  

Research about the safe zones of microscrews for orthodontic anchorage positioning Chinese alveolar bone

作　　者：魏惺[1] 赵立星[1] 许桢睿[1] 唐娜[1] 赵志河[1] 

机构地区：[1]四川大学华西口腔医院正畸科,四川成都610041

出　　处：《国际口腔医学杂志》2010年第2期128-132,共5页International Journal of Stomatology

基　　金：国家自然科学基金资助项目(30470436;10572160)

摘　　要：目的研究中国人牙槽骨解剖形态特点,以确定正畸支抗用微种植钉植入的安全区。方法使用螺旋CT技术对21例正常中国人的颌骨进行扫描重建,并且分别测量距牙槽嵴顶3、5、7、9mm处牙齿根间区近远中向和颊舌(腭)向的参数。结果1)在上颌近远中测量中,前牙区最大牙根间距位于侧切牙与尖牙之间,最小牙根间距位于中切牙与侧切牙之间;后牙区相邻牙的最大牙根间距位于第二前磨牙和第一磨牙之间,最小牙根间距位于第一磨牙与第二磨牙之间。颊舌(腭)向测量中,最大的颊舌向骨厚度位于第一磨牙和第二磨牙之间,最小骨厚度位于中切牙与侧切牙之间。2)在下颌近远中测量中,相邻牙的最大牙根间距位于第一磨牙和第二磨牙之间,最小牙根间距位于中切牙与侧切牙之间。颊舌(腭)向测量中,最大的颊舌向骨厚度位于第一磨牙和第二磨牙之间,最小骨厚度位于中切牙之间。结论螺旋CT三维重建效果良好,能够充分识别牙槽骨和牙齿根间区的结构关系,为中国人牙槽骨正畸支抗用微种植钉安全植入提供了临床参考依据。Objective To study the anatomical characteristics of Chinese alveolar bone to determine the safe zones of microscrews placement which are used for orthodontic anchorage.Methods Twenty-one normal Chinese jaws were scanned and reconstructed with helical CT technology.The mesiodistal and the buccolingual parameters were measured at the 3,5,7 and 9 mm from the alveolar crest.Results 1）In the anterior area of maxilla,the widest mesiodistal distance between roots was between the lateral incisor and the canine,the narrowest mesiodistal distance between roots was between the central incisor and the lateral incisor;in the posterior area of maxilla,the widest mesiodistal distance between roots was between the second premolar and the first molar,the narrowest mesiodistal distance between roots was between the first molar and the second molar.In the buccolingual dimension,the greatest bone thickness was between the first molar and the second molar,the least bone thickness was between the central incisor and the lateral incisor.2）In the mandible,the widest mesiodistal distance between roots was between the first molar and the second molar,the narrowest mesiodistal distance between roots was between the central incisor and the lateral incisor.In the buccolingual dimension,the greatest bone thickness was between the first molar and the second molar,the least bone thickness was between the central incisors.Conclusion The reconstructed images of helical CT were high qualitative,which could fully identify the relationship of alveolar bone and the space between roots.Therefore,we provided the reference and indications for a safe application of the microscrews in the Chinese alvelar bone.

关 键 词：微种植钉 应用解剖 安全区 支抗 螺旋CT 

分 类 号：R783.5[医药卫生—口腔医学]