摘要
目的:应用组牙功能[牙合]天然牙列模型的三维图像,观察不同个体“磨道斜度”的差异;不同牙位后牙“磨道斜度”的变化趋势;同一个体随磨耗进展“,磨道斜度”的变化。方法:选择拥有十年前后完整牙列模型的研究对象17名,平均年龄56.5岁。使用三维光栅扫描系统ATOSⅡSO扫描模型,获得三维图像。使用逆向工程软件Geomagic 12进行模型三维图像的测量和分析。测量研究对象双侧上颌第一前磨牙、第二前磨牙、第一磨牙、第二磨牙“磨道斜度”值,统计分析“磨道斜度”变化趋势。结果:不同牙位后牙的“磨道斜度”值差异有显著性(P<0.05),且无论十年前还是十年后,无论左侧还是右侧,均存在从第一前磨牙至第二磨牙“磨道斜度”逐渐减小的变化趋势。不同研究对象“磨道斜度”值差异同样有显著性(P<0.05)。十年前后,研究对象的“磨道斜度”值改变方向不一致,部分研究对象左右两侧变化不一致。结论“:磨道斜度”具有个体差异;同一个体从第一前磨牙至第二磨牙“磨道斜度”逐渐减小;同一个体随时间进展“磨道斜度”值变化方向可能与个体[牙合]运循环范围有关。
Objective: To investigate the values and change tendency of grinding guidance inclination in individuals with group function occlusion. Methods: Measurements were performed on 34 pairs of mounted casts from 17 middleaged persons with group function occlusion(now and 10 years before). The grinding guidance inclination of maxillary posterior teeth was measured in the three-dimensional images of all the casts. Statistical analysis of grinding guidance inclination was performed with Paired-samples T test and Two-way ANOVA. Results: The grinding guidance inclination was significantly different between the different teeth positions(P<0.05). The grinding guidance inclination was significant difference between different subjects(P<0.05). From the first premolar to the second molar, the grinding guidance inclination successive decreased. During the 10-year period, the change of grinding guidance inclination in all subjects was asymmetrical. Conclusions: The successive decrease of the grinding guidance inclination from the first premolar to the second molar could be confirmed. The longitudinal change tendency of the grinding guidance inclination was depended on the individual pattern of masticatory movement.
作者
钱锟
潘洁
徐军
QIAN Kun;PAN Jie;XU Jun(Department of General Dentistry,Peking University School and Hospital of Stomatology,Beijing 100081,China;Department of Prosthodontic,Peking University School and Hospital of Stomatology,Beijing 100081,China)
出处
《口腔颌面修复学杂志》
2023年第2期93-98,共6页
Chinese Journal of Prosthodontics
关键词
磨道斜度
组牙功能[牙合]
咀嚼运动
grinding guidance inclination
group function occlusion
masticatory movement
