不同矢状骨面型成人上下尖牙区根骨关系的锥形束CT研究  

A cone-beam computed tomography study on maxillary and mandibular canines and alveolar bone in adults with different sagittal skeletal patterns

作　　者：韩敏[1] 张韶君[1] 席迅 Han Min;Zhang Shaojun;Xi Xun(Department of Stomatology,The First Affiliated Hospital of Shandong First Medical University&Shandong Provincial Qianfoshan Hospital,250014)

机构地区：[1]山东第一医科大学第一附属医院(山东省千佛山医院)口腔科,济南250014

出　　处：《中华口腔正畸学杂志》2024年第3期138-142,共5页Chinese Journal of Orthodontics

基　　金：山东省自然科学基金青年项目(ZR2023QH421);山东省儿童青少年生长发育与健康管理专项课题(JKZX2023105)。

摘　　要：目的应用锥形束CT测量并分析不同矢状骨面型成人上下尖牙区的根骨关系。方法.本研究为回顾性研究,选取符合纳入标准的成年患者的锥形束CT影像91例,年龄(20.84±1.77)岁。根据ANB角分组:Ⅰ类0°≤ANB≤5°(31例),Ⅱ类ANB>5°(30例),Ⅲ类ANB<0°(30例)。测量上下尖牙唇、舌侧的根尖、根尖1/4、根中1/2和根颈1/4四个截面的牙槽骨厚度,以及上下尖牙唇舌侧附着丧失距离。结果①骨性Ⅱ类上颌尖牙根尖唇侧根骨距离[(1.79±0.84)mm]小于骨性Ⅲ类[(2.40±0.92)mm],差异有统计学意义(P<0.05)。②骨性Ⅱ类上颌尖牙根尖舌侧根骨距离[(9.77±1.93)mm]大于骨性Ⅲ类[(8.41±1.68)mm],差异有统计学意义(P<0.05)。骨性Ⅱ类上颌尖牙根尖1/4舌侧根骨距离[(6.40±1.89)mm]大于骨性Ⅲ类[(5.17±1.60)mm],差异有统计学意义(P<0.05)。③Ⅰ类、Ⅱ类、Ⅲ类成人的上、下颌尖牙,唇侧根骨距离小于同截面舌侧根骨距离,差异有统计学意义(P<0.01)。④.上颌尖牙唇侧牙槽骨,根尖1/4[(0.51±0.50)mm]和根中1/2[(0.51±0.45)mm.]最薄,舌侧牙槽骨根颈1/4[(1.48±0.73)mm]最薄;下颌尖牙唇侧牙槽骨根中1/2[(0.37±0.34)mm]最薄,舌侧牙槽骨根颈1/4[(0.95±0.53)mm]最薄,差异有统计学意义(P<0.01)。结论Ⅰ类、Ⅱ类、Ⅲ类成人上下尖牙在牙槽骨中的位置均偏唇侧,矢状骨面型主要影响上颌尖牙根尖附近的根骨关系,上下尖牙牙根唇侧根中附近牙槽骨最薄,牙根舌侧颈部附近牙槽骨最薄。Objective To measure and analyze the maxillary and mandibular canines and alveolar bone morphology in adults with different sagittal skeletal patterns using cone beam computedtomography scan.Methods Ninety-one adults[age(20.84±1.77)years old]who met the inclusion criteria were selected.Cone beam CT images were stored in DICOM format for three-dimensional reconstruction analysis.According to ANB angle,they were divided into three groups(ClassⅠ0°≤ANB≤5°,31 cases;ClassⅡANB>5°,30 cases;ClassⅢANB<0°,30 cases).The inter-root distance of maxillary and mandibular canines was measured at the apical point,apical 1/4,middle 1/2 and cervical 1/4 levels.The distance from enamel-cemental junction to alveolar crest was measured.Results①The labial alveolar bone thickness at the apical point of maxillary canine with ClassⅡ[(1.79±0.84)mm]was less than that in ClassⅢ[(2.40±0.92)mm],with a significant difference(P<0.05).②The lingual alveolar bone thickness at the apical point of the maxillary canine in ClassⅡ[(9.77±1.93)mm]was greater than that in ClassⅢ[(8.41±1.68)mm],with a significant difference(P<0.05).The lingual alveolar bone thickness at the apical 1/4 of maxillary canine in ClassⅡ[(6.4±1.89)mm]was greater than that in ClassⅢ[(5.17±1.60)mm],with a significant difference(P<0.05).③The labial alveolar bone thickness of maxillary and mandibular canines was less than lingual alveolar bone in a single cross section,not affected by sagittal skeletal pattern,and the difference was significant(P<0.01).④The thicknesses of maxillary canine labial alveolar bone at the apical 1/4[(0.51±0.50)mm]and middle 1/2[(0.51±0.45)mm]cross section were less than in the other two sections.The thickness of maxillary canine lingual alveolar bone at cervical 1/4 cross section[(1.48±0.73)mm]was less than in the other three sections.The thickness of mandibular canine labial alveolar bone at middle 1/2 cross section[(0.37±0.34)mm] was less than in the other three sections.The thickness of mandibular canine lingua

关 键 词：成人 尖牙 矢状骨面型 锥形束CT 

分 类 号：R78[医药卫生—口腔医学]