外科的矯正治療前後における前歯部開咬症例の口唇, 頬, 舌圧の変化
外科的矯正治療前後における前歯部開咬症例の口唇, 頬, 舌圧の変化
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前牙开牙合患者正畸手术前后唇、颊、舌压力的变化
DOI：
10.5927/jjjd1991.12.47
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Hideo Mitani
中科院分区：
文献类型：
--
作者：
Ryo Tomizuka;Mitsuhiko Kawauchi;Hiroshi Kawamura;Hideo Mitani
许多前牙开牙合病例表现出口周软组织功能异常，这些会导致咬合异常和术后复发。本研究的目的是探讨口周软组织在咬合和牙弓构建中的作用。本研究选择接受过正颌手术的成年女性M类前牙开牙合病例（手术组）和咬合正常的女性成年人。手术组的材料在正颌手术前（术前）、脱粘后6个月（短跨度）和后期（中跨度）进行矫正。使用微型压力传感器在牙齿和硬腭的8个点测量软组织压力。还测量了舌头的尺寸、下牙弓和下基弓的长度和宽度。获得的结果如下。 1）术前组压力低于中跨组。在短跨度组中，前部区域的软组织压力增加，而后部区域的软组织压力减小。 2)正常咬合组压力高于术前组,短跨组等于或低于中跨组。 3)短跨组的接触率高于术前组。但是，在中跨组中，前部区域的接触比下降，后部区域的接触比增加。另外，正常组的接触率高于术前组，与中跨组的接触率相当。 4）各组之间舌头和牙弓的测量没有发现差异。但正常咬合时舌头的长度比手术前组更长。短跨组舌体宽度大于正常咬合组舌体宽度。这些结果表明正颌手术会改变软组织的压力和接触比。这表明口周软组织可能在手术治疗后在功能上适应新环境。
Many anterior openbite cases show the abnormal functions of perioral soft tissues, and these can cause abnormal occlusion and relapse after surgery.The purpose of this study was to investigate the role of perioral soft tissues in the construction of occlusion and dental arches.Female adult Class M anterior open bite cases that had received orthognathic surgery (surgery group), and female adults with normal occlusion, were selected for this study. Materials of the surgery group were corrected at the period of pre-orthognathic surgery (pre-surgery), six months after debonding (short span), and later (middle span).Soft tissuepressures were measured with subminiature pressure sensors at 8 points on teeth and the hard palate. Tongue size, the length and width of the lower dental arch and the lower basal arch, were also measured.The results obtained were as follows. 1) The pressures of the pre-surgery group were lower than those of the middle span group. In the short span group, soft tissue pressures increased at thefrontal area, and decreased at the posterior area. 2) Thepressures of the normalocclusion were higher than the pre-surgery group, and the short span group was equal to or lower than the middle span group. 3) Contact ratios of the short spangroup were higher than those of the pre-surgery group. But, in the middle span group, contact ratios decreased at the frontal area and increased at the posterior area. Otherwise, the contact ratio of the normal group was higher than that ofthe pre-surgery group, and equal to that of middle span group. 4) No differenceswere found regarding measurements of the tongue and the dental arches among the groups. But the length of the tongue at normal occlusion was longer than in the pre-surgery group. The width of the tongue in the short span group was greater than that of the normal occlusion.These results demonstrate that orthognathic surgery would change the pressures and contact ratio of the soft tissues. And it suggests that perioral soft tissues might be adapted functionally to new environments following surgical treatment.