比格犬下颌骨微种植体的置入部位和方法  

Mandibular interradicular place of beagles for microscrew implantation

作　　者：刘雯[1] 胡赟[2] 邓锋[1] 宋锦璘[1] 郑雷蕾[1] 赵志河[3] 唐甜[3] 王智强[4] 

机构地区：[1]重庆医科大学附属口腔医院正畸科,重庆市400015 [2]重庆医科大学附属口腔医院预防科,重庆市400015 [3]四川大学华西口腔医院正畸科,四川省成都市610041 [4]山东大学附属省立医院口腔正畸科,山东省济南市250021

出　　处：《中国组织工程研究与临床康复》2011年第41期7635-7638,共4页Journal of Clinical Rehabilitative Tissue Engineering Research

基　　金：国家自然科学基金青年基金(81000463);教育部"高等学校博士学科点专项科研基金"新教师类(20095503120006);重庆市医学重点学科项目~~

摘　　要：背景:比格犬下颌骨解剖结构复杂,微种植体置入位置不恰当会造成微种植体周骨量不足和微种植体松脱。目的:观察比格犬下颌骨相应解剖结构及微种植体的置入部位和方法。方法:取成年雄性比格犬尸体下颌骨,测量下颌第二双尖牙牙尖至下颌第一磨牙远中颊尖的长度;下颌第二、三、四双尖牙和第一磨牙根分叉度及牙根分叉处距离下颌神经管的垂直高度;于牙槽嵴下4,6mm处用游标卡尺测量下颌第二、三、四双尖牙和第一磨牙颊舌向牙槽嵴厚度和近远中根的水平距离。结果与结论:下颌第二双尖牙牙尖至下颌第一磨牙远中颊尖的长度平均为52.70mm;距离下颌神经管的垂直高度最远的是第一磨牙,最近的是第四双尖牙,根分叉度最大的是第一磨牙,最小的是第四双尖牙。下颌第二、三、四双尖牙和第一磨牙的颊舌向骨质厚度随着距离牙槽嵴顶深度的增加而增加。在距离牙槽嵴顶4,6mm的深度,下颌第二、三、四双尖牙和第一磨牙近远中根的水平距离均大于5mm,且随着距离牙槽嵴深度的增加而增加。说明比格犬下颌第二双尖牙至第一磨牙牙槽骨段骨质结构均匀。在距离牙槽嵴顶4～6mm深度,单颗牙自身近远中牙根之间足以提供微种植体置入所需骨量。BACKGROUND：The structure of Beagle＇s mandible is complex,and improper place for microscrew implantation would lead to deficiency of bone mass surrounding the microscrew and microscrew loosening.OBJECTIVE：To study the anatomic structure of Beagle＇s mandible and find out the place suitable for placing the orthodontic microscrew.METHODS：Five male Beagles corpses were collected.The distance between P2 and M1,the distance between tooth root crotch and inferior maxillary nerve,the degree of tooth root crotch,the mesiodistal width between the roots of teeth and the buccolingual sickness from 4 mm and 6 mm beneath the top of alveolar crests were measured through the use of sliding caliper.RESULTS AND CONCLUSION：The mean distance between P2 and M1 was 52.70 mm.The root crotch of M1 was the farthest place from inferior maxillary nerve,while the root crotch of P4 expressed the nearest.The degree of M1 root crotch was the biggest while P4 showed the smallest.The mesiodistal width between the roots of teeth 4 mm and 6 mm beneath the top of the alveolar crests all exceeded 5 mm and the buccolingual sickness increased.From 4 mm and 6 mm beneath the top of the alveolar crest,the mandibular interradicular place for microscrew implantation in Beagles was located between the mesial and distal roots of P2,P3,P4 and M1.

关 键 词：比格犬 下颌骨 微种植体 解剖结构 动物模型 

分 类 号：R318[医药卫生—生物医学工程]