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首页> 外文期刊>The Journal of Prosthetic Dentistry >Magnetic resonance imaging on TMJ disc thickness in TMD patients: a pilot study.
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Magnetic resonance imaging on TMJ disc thickness in TMD patients: a pilot study.

机译：TMD患者TMJ盘厚度的磁共振成像：一项初步研究。

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STATEMENT OF PROBLEM: Studies of temporomandibular joint (TMJ) discs removed from autopsy specimens and in surgery indicate that they are often thicker in patients with temporomandibular disorders (TMDs). Disc thickness may also change when the condyle moves in and out of the joint fossa during opening and closing. PURPOSE: The purpose of this pilot study was to test the hypothesis that the TMJ disc thickness is greater in TMD patients than in healthy subjects and is affected by the degree of jaw opening. MATERIAL AND METHODS: Magnetic resonance images (MRI) were made of the TMJs in young volunteers, 9 asymptomatic subjects and 9 TMD subjects, at closed and at 10-, 20-, and 30-mm open positions. The thickness of the anterior and posterior bands of the discs and the intermediate zones was measured and compared between TMD and control groups, and between closed and opened positions, using the repeated-measures method in general linear model (alpha=.05). RESULTS: The hypothesis that the disc was thicker in the TMD than in the control group was supported with respect to the anterior band and intermediate zone (P<.046), but not with respect to the posterior band. The hypothesis that the thickness is affected by the degree of jaw opening was only supported for the posterior band, where it increased during opening in both groups (P<.005). CONCLUSIONS: The results indicate that the anterior band and the intermediate zone of the TMJ discs are thicker in TMD patients than in healthy subjects. The posterior band thickness increases with mouth opening in both asymptomatic and TMD subjects.
机译：问题陈述：对从尸检标本中取出的颞下颌关节（TMJ）椎间盘进行的研究以及在手术中的研究表明，在颞下颌关节疾病（TMD）患者中，椎间盘通常较厚。当opening在打开和关闭过程中移入和移出关节窝时，椎间盘的厚度也可能改变。目的：本实验研究的目的是检验以下假设：TMD患者的TMJ椎间盘厚度比健康受试者大，并且受颌骨张开程度的影响。材料与方法：在年轻的志愿者，9名无症状受试者和9名TMD受试者中，在闭合位置以及在10毫米，20毫米和30毫米打开位置，对TMJ进行磁共振成像（MRI）。使用通用线性模型中的重复测量方法（alpha = .05），测量并比较了TMD组和对照组之间以及闭合位置和打开位置之间的椎间盘和中间区的前后带厚度。结果：关于TMD椎间盘比对照组厚的假说在前带和中间区（P <.046）而不是在后带得到支持。厚度受下颌张开程度影响的假说仅在后带得到支持，两组在张开时厚度都增加了（P <.005）。结论：结果表明，TMD患者的TMJ椎间盘前带和中间区比健康人更厚。在无症状和TMD受试者中，后带厚度随着张口而增加。

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