摘要
目的:利用CBCT测量青少年双根型下颌第一恒磨牙(PMFMs)牙根外形解剖数据,为根分叉病变的预防、牙周炎的预后判断及治疗提供解剖学依据和临床指导。方法:选取359颗双根型PMFMs的CBCT影像学资料,测量根柱长度、CEJ根方2 mm处的根柱凹陷程度、根分叉穹窿顶点下2 mm处的根分叉宽度和根面凹陷程度。结果:颊侧根柱短(P<0.05);在根分叉穹窿顶点下2 mm处颊侧根分叉大,近中根根面凹陷更深更显著(P<0.05);在CEJ根方2 mm处颊侧的根柱凹陷宽而深(P<0.05)。结论:在牙周检查和治疗双根型PMFMs时要关注牙根的表面凹陷,发生早期根分叉病变可从颊侧分叉进入治疗。
Objective:To measure the anatomical data of the root surface of the two-rooted permanent mandibular first molars(PMFMs)with CBCT in adolescents.Methods:The root trunk length(RTL),the degree of concavities of root trunk at 2mm below CEJ,the width of root bifurcation and the degree of root concavities at 2 mm below the apex of the root fornix of 359 two-rooted PMFMs were measured by CBCT imaging.Results:On the buccal side the RTL was shorter(P<0.05),the width of the root bifurcation at 2 mm below the apex of the root fornix was wider,the depth and extent of the root depression of mesial root were greater than those of the distal root(P<0.05).At 2 mm below CEJ,the width and depth of the buccal root trunk depression were larger than those of the lingual side(P<0.05).Conclusion:During periodontal examination and treatment of two-rooted PMFMs,attention should be paid to the surface depression of the roots,when the root bifurcation lesion occurs early,it can be considered to enter bifurcation area from buccal side.
作者
石方玉
柳蓉蓉
王丽丽
朱祥奎
迟江蓬
刘玲玲
刘树泰
SHI Fangyu;LIU Rongrong;WANG Lili;ZHU Xiangkui;CHI Jiangpeng;LIU Lingling;LIU Shutai(Binzhou Medical University,264000,China;Yantai Stomatological Hospital;Department of Stomatology,Zhaoyuan People's Hospital)
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2021年第1期55-58,共4页
Journal of Practical Stomatology
关键词
锥形束CT
下颌第一恒磨牙
根分叉
根柱长度
CBCT
Permanent mandibular first molars
Root bifurcation
Root trunk length
