下颌偏斜患者髁突正中关系位与最大牙尖交错位三维位置不调的比较分析

发布时间：2018-02-02 17:28

本文关键词： 正中关系不调下颌偏斜髁突　出处：《重庆医科大学学报》2014年04期 　论文类型：期刊论文

【摘要】：目的:分析下颌偏斜患者髁突正中关系(centric relation,CR)位与最大牙尖交错(maximum intercuspation,MI)位不调的三维特征,探讨其对牙颌面畸形正畸治疗的影响。方法:随机选取下颌偏斜患者34例为试验组,非偏斜患者50例为对照组,再将试验组按有无颞下颌关节紊乱症分为2组。分别获取所有研究对象CR位、MI位时的咬合记录,记录CR位的干扰牙位,采用髁突移位测量仪测量CR位与MI位时髁突位置,比较干扰及CR-MI不调的比例、CR-MI在三维方向的偏移量并进行统计分析。结果:(1)干扰发生的比例在试验组、对照组分别为94.12%、72%,差异具有统计学意义(χ2=6.421,P=0.010)。2组的干扰均大多位于后牙区,分别占91.18%和68%;(2)CR-MI不调的比例在试验组为79.41%,对照组为12%,差异有统计学意义(χ2=38.59,P=0.000);(3)经统计学分析,试验组中下颌偏斜侧与非偏斜侧CR-MI不调的比例(χ2=0.167,P=0.687)、CR-MI垂直向偏移量(t=0.283,P=0.779)、CR-MI矢状向偏移量(t=-0.743,P=0.463)均无明显差异(P0.05);有颞下颌关节紊乱症组与无症状组比较,其下颌偏斜量、CR-MI的偏移量等均无明显差异(P0.05)。结论:下颌偏斜患者更易出现咬合干扰及CR-MI不调,故进行正畸治疗前有必要分析下颌偏斜患者CR-MI的一致性,在理想的颌位上确定正畸治疗方案。
[Abstract]:Objective: to analyze the relationship between the central condylar relationship and maximum maximum intercuspation in mandibular oblique patients. Methods: 34 patients with mandibular deviation were randomly selected as experimental group and 50 patients as control group. The experimental group was divided into two groups according to whether there was temporomandibular joint disorder. The occlusal records of all the subjects were obtained from the MI position of CR position and the interference position of CR position was recorded. The condylar position of CR and MI was measured by condylar displacement measuring instrument, and the ratio of interference and CR-MI was compared. The deviation of CR-MI in 3D direction was analyzed statistically. Results the proportion of CR-MI interference occurred in the experimental group and the control group was 94.1294.12% and 72% respectively. The difference was statistically significant (蠂 ~ 2 ~ (6.421) P ~ (0.010) 2). Most of the interference were in the posterior teeth, accounting for 91.18% and 68 ~ (th), respectively. The ratio of CR-MI was 79.41 in the trial group and 12 in the control group. The difference was statistically significant (蠂 ~ 2 / 38.59). (3) by statistical analysis, the ratio of CR-MI in the mandibular oblique side and non-oblique side was not adjusted in the experimental group (蠂 ~ 2 = 0.167). The vertical migration amount of CR-MI is 0.283 / 0.779 / m ~ (-1) and the sagittal migration value of CR-MI is t ~ (-0.743). There was no significant difference between P0. 463 and P0. 05; The amount of mandibular deflection in temporomandibular disorder group was higher than that in asymptomatic group. There was no significant difference in the deviation of CR-MI (P 0.05). Conclusion: mandibular oblique patients are more prone to occlusal interference and CR-MI unmodulation. Therefore, it is necessary to analyze the consistency of CR-MI in mandibular oblique patients before orthodontic treatment.
【作者单位】：口腔疾病与生物医学重庆市重点实验室、重庆医科大学附属口腔医院正畸科;
【分类号】：R783.5
【正文快照】： 下颌偏斜是临床中常见的颜面不对称畸形,并常伴牙弓宽度不调、咬合及颞下颌关节功能的紊乱。颞下颌关节、牙齿、颌骨及神经肌肉组成了整个口颌系统,其中颞下颌关节在整个口颌系统的稳定中起着重要作用。研究认为[1]:当上下颌牙齿处于牙尖交错,上下颌牙列最广泛、最紧密接触即

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