无症状人群颞下颌关节盘位置的核磁共振研究

目的 观察无症状志愿者颞下颌关节盘的位置,了解无症状人群中是否存在关节盘位置的异常,及其性别、左右侧分布特点.方法 无颞下颌关节病症状及病史的志愿者30名,共60例关节,其中男、女各15名,对其双侧颞下颌关节行开闭口轴位、斜矢状位和斜冠状位扫描,根据扫描结果对关节盘位置进行分类.结果 30名无症状志愿者中,正位关节盘45例,发生率为75%,其中女性20例,男性25例,右侧23例,左侧22例;前移位关节盘7例,发生率为11.67%,其中女性5例,男性2例,右侧5例,左侧2例;外侧移位关节盘6例,发生率为10%,其中女性3例,男性3例,右侧2例,左侧4例;内侧移位关节盘2例,发生率为3.33%,其中女性0例,男性2例,右侧0例,左侧2例;后移位关节盘0例,发生率为0.不同性别比较,差异无统计学意义(P>0.05),左右侧关节比较,差异无统计学意义(P>0.05).结论 无症状志愿者关节盘多为正位,但无症状人群的关节盘移位确实存在,且以前外侧旋转移位最为常见,关节盘移位类型与性别无关,左右侧分布无差异.     

磁共振成像在诊断颞下颌关节盘移位中的作用

２８例临床诊断为颞下颌关节盘移位的患者和２例作为对照的无症状自愿受检查共４７侧关节接受了磁共振成像的检查。结果提示，磁共振成像可以提供非常清晰的关节盘形状、位置和精确的盘－突关系的图象。作者评价了磁共振成像的准确性，讨论了磁共振成像的优、缺点，另外还介绍了磁共振成像的简单原理。     

颞下颌关节盘前移位后关节的适应性改建

颞下颌关节盘前移位是最常见的关节紊乱病,它的发病机制仍然不清楚,近年来,许多研究表明关节盘移位后,关节会发生适应性改建。充分了解这一变化,对于临床上治疗颞下颌关节盘前移位患者时,判断其是否需要进行手术复位,具有重要的指导意义。本文就关节盘移位后关节盘、髁突软骨的适应性改建,及目前研究的局限和展望作一综述。     

颞下颌关节紊乱病关节盘前后界限改变的核磁共振定位研究

目的:通过对关节盘前后界限的测定,确定颞下颌关节紊乱病患者关节盘移位改变的情况,探讨其临床意义.材料与方法:16例经临床确诊为颞下颌关节紊乱病患者行颞下颌关节(TMJ)的核磁共振(MRI)检查与13例正常人的MRI影像进行对比分析.结果:T1图像矢状位时,在TMD组,关节盘前缘位于关节结节最低点垂直线前约0.43mm,而正常组则位于其前约0.13mm,两组间差异无统计学意义,闭口位时在TMD组关节盘后缘与双板区交界处约位于关节四中心垂直线81°处,而正常组则位于其93.31°处,两组间有统计学差异.结论:TMD组在闭口位时,关节盘均可有明显的前移,但前缘前移变化不大,这与关节盘形态改变状况一样均为颞下颌关节紊乱病的重要指征.     

应用磁共振评估无牙患者颞下颌关节关节盘位置

目的:探讨11例无牙患者双侧颞下颌关节(TMJ)关节盘-髁关系。方法:通过11例无牙患者的临床和磁共振(MRI)检查,记录其临床表现及双侧TMJ的MRI影像学表现,并比较两者之间的关系。结果:11例无TMJ症状的无牙患者的22侧关节中,10侧关节盘移位,占45%。其中,男性14侧关节中,4侧关节盘移位,占28.6%;女性8侧关节中,6侧关节盘移位,占75%。结论:无牙患者关节盘移位与临床表现无相关关系,无牙患者中,女性关节盘移位多于男性,缺牙可能造成无牙患者TMJ结构紊乱。     

颞下颌关节关节盘前移位的研究

颞下颌关节关节盘前移位的研究ＳｔｕｄｙｏｆＡｎｔｅｒｏｒｄｉｓｃｄｉｓｐｌａｃｅｍｅｎｔｏｆｔｅｍｐｏｒｏｍａｎｄｉｂｕｌａｒｊｏｉｎｔ韩正学综述哈纟其杨驰审校颞下颌关节（ＴＭＪ）关节盘前移位（ａｎｔｅｒｏｒｄｉｓｃｄｉｓｐｌａｃｅｍｅｎｔ，ＡＤＤ）...     

颞下颌关节盘前移位的研究进展

颞下颌关节盘前移位在关节结构紊乱中较常见。因为关节盘前移位后，颞下颌关节内结构发生明显改变，各种炎性因子增多，并可见退行性变化，从而产生或不产生临床症状。因此，颞下颌关节盘前移位的研究越来越被人们所关注。     

可复性关节盘前移位对颞下颌关节三维形态学参数的影响

目的通过三维形态学测量方法探究可复性关节盘前移患者(ADDwR)与正常人颞下颌关节(TMJ的差异。方法招募了15名ADDwR患者和10名无症状的正常人,在MIMICS 20.0软件中重建出上、下颌骨的三维模型,在三维模型上测量双侧TMJ的9个形态学参数,分析ADDwR患者患病侧与正常人两侧之间的差异。结果 ADDwR患者患侧的水平髁突角、冠状髁突角均显著大于正常人(P<0.01),矢状升支角、关节腔内间隙、关节腔外间隙、关节腔上间隙、关节腔前间隙和关节腔后间隙均显著小于正常人(P<0.01)。结论ADDwR将导致患病侧的髁突角显著大于正常人,下颌矢状升支角、关节间隙显著小于正常人,从而导致髁突向上移位,更接近关节窝。     

颞下颌关节盘前移位的生物学基础

颞下颌关节盘前移位的病因,目前尚无统一认识,本文根据颞下颌关节盘前移位的胚胎发育、组织形态学特点,从生物学基础方面探讨颞下颌关节盘前移位的病因并结合近年来颞下颌关节盘前移位的动物实验,证实其病因的假设。     

颞下颌关节盘前移位病因研究进展

颞下颌关节盘前移位(temporomandibular joint anterior disc displacement, TMJ ADD)是临床上常见的一种颞下颌关节紊乱病(temporomandibular disorder, TMD),主要表现为疼痛、关节弹响和下颌运动受限,严重者影响日常生活。但其病因复杂,至今尚无统一结论,对其发病机制也缺乏明确而全面的认识。本文将对ADD的病因以及发病机制作一综述。     

Relationship between the TMJ disc and condyle position on MRI and occlusal contacts on lateral excursions in TMD patients

Confusion about the relationship between dental occlusion and the temporomandibular disorders (TMD) has been evident in the literature for many years. Previous studies have supported the concept of a multifactorial aetiology of TMD, the occlusal factor in general being of minor importance. The purpose of the study was to investigate the relationship between condyle and disc positions and occlusal contacts on lateral excursions of the mandible in patients with TMD. A total of 122 temporomandibular joints (TMJs) of 61 patients with TMD were evaluated using magnetic resonance imaging (MRI) and occlusal analyses were made clinically. Non-working-side contacts were found to be statistically significant in TMJ anterior disc displacement. No significant statistical correlation was found between the severity of anterior disc displacement and non-working-side contacts in both canine guidance and group function occlusions. There was no correlation between non-working-side contacts and condyle positions in both occlusion types in the present study. It was concluded that non-working-side contacts had some effect on disc position in TMD, however the presence of these contacts in both canine guidance and group function occlusions did not correlate with anterior disc displacement in TMD statistically. Therefore, non-working-side contacts are not to be regarded as the prime cause of anterior disc displacement.     

Variation of heads of lateral pterygoid muscle and morphology of articular disc of human temporomandibular joint – anatomical and histological analysis

To grasp the documented evidences available regarding the cause of the anteriorly displaced human temporomandibular joint (TMJ) disc. With 20 specimens of human TMJ from cadavers, at first the number of heads of lateral pterygoid muscle (LPM) bundles were analysed with macroanatomical method. Secondary histological procedure with haematoxyline and eosine staining and orceine staining were carried out for the same specimens. Macroscopically, in 13 specimens an upper and a lower head of the LPM were present. In the other seven specimens, not only an upper and a lower head, but also a third inner head of the LPM covered with a separate fascia was observed. Histochemically, the specific localization of certain bundles of thick elastic fibres in the antero-medial parts of the anteriorly displaced deformed TMJ disc were observed.     

Correlation between pain and MRI findings in TMD patients

Introduction

Magnetic resonance imaging has been established as the gold standard for assessment of the temporomandibular joint. Apart from an excellent assessment of the soft tissues it has the advantage not to expose the patient to ionizing radiation. There is a lack of literature concerning the correlation between pain intensity and radiological findings of the temporomandibular joint. Moreover there is the question of whether a progressive degeneration of the cartilaginous components is accompanied by an increasing degeneration of the osseous parts of the mandibular joint and vice versa. Therefore, this study aims at analyzing correlations between pain and radiological findings. Furthermore, the link between osseous and cartilaginous degeneration is studied.

无症状青年颞下颌关节盘位置的MRI研究

目的 了解关节盘前移位在无症状青年志愿者中发生率,并探讨其颞下颌关节盘和髁突的位置关系。方法 根据D race标准确定无症状志愿者中关节盘前移位,并进行分组以及定点和相关数据的测量以确定盘-髁关系,对测得数据进行统计分析。结果 30名无症状志愿者中有7人(23.33%)存在单侧可复性关节盘前移位;髁突发育异常者2人(6.67%);双侧均正常者21人(70.00%)。关节盘-髁突位置的测定数据在各组间有统计学意义。结论 磁共振影像检查证实在无症状青年志愿者中存在关节盘前移位。     

145例颞下颌关节紊乱病患者的磁共振影像分析

目的 研究145例颞下颌关节紊乱病（TMD）患者的磁共振（MRI）影像学表现,为临床治疗提供依据。方法 利用MRI对145例TMD患者的290侧关节完成开闭口斜矢状位、闭口斜冠状位T1/T2加权成像,观察盘突关系,髁突骨质改变,关节腔积液,关节盘形态改变等情况,并进行分类统计。结果 MRI检查结果显示：37.2%患者双侧TMD病变,71%患者伴有不可复关节盘前移位,10.3%患者伴有可复性关节盘前移位,6.9%患者伴有髁突骨质改变,4.8%患者伴关节腔积液,52.4%患者伴关节盘明显变形。结论 TMD患者中以关节盘不可复性前移位最为常见,提示正常盘突关系的重要性。MRI可以为临床医师提供可靠的影像学诊断依据。     

Comparison of clinical and magnetic resonance imaging diagnoses in patients with TMD history

The aim of this study was to evaluate the diagnostic accuracy of a well-defined clinical examination for diagnosing anterior disc displacement with and without reduction. A series of 40 patients with temporomandibular disorder (TMD) history were examined according to well-defined routine criteria. This examination included detailed history-taking, standardized clinical head and neck examination that included measurements of the range of motion, palpation of the temporomandibular joints and muscles of mastication for pain and auscultation of joint sounds. Magnetic resonance images of the joints were used as 'gold standard'. Diagnostic accuracy of the clinical examination was 83% for determining normal disc-condyle relationship, 72% for diagnosing anterior disc displacement with reduction, and 81% for diagnosing anterior disc displacement without reduction. Our results suggest that anterior displacement of the disc can be diagnosed with considerable accuracy using a well-defined clinical examination only. Therefore, we conclude that not all patients with TMD symptoms require magnetic resonance imaging examination before treatment.     

伴偏侧咀嚼单侧关节盘前移位患者的翼外肌MRI特点分析

目的:分析伴偏侧咀嚼(chewing-side preference,CSP)的单侧颞下颌关节盘前移位(anterior disc displacement,ADD)患者的翼外肌(lateral pterygoid muscles,LPM)磁共振成像特点,探讨CSP对ADD患者LPM结构和形态的影响.方法:横断面调查2...     

The anatomic relationship of the insertion of the superior lateral pterygoid muscle to the articular disc in the temporomandibular joint of human cadavers

Confusion has existed as to whether the major insertion of the superior lateral pterygoid muscle is into the articular disc or the condyle. Five human cadaver joints were studied under the dissecting microscope. This allowed superior lateral pterygoid fibres to be selectively placed under tension to determine their point of insertion and to examine the integrity of the anterior joint capsule. All superior lateral pterygoid fibres gained either direct or indirect insertion to the condyle. A classification for the variation in insertion is suggested. The fibres of the anterior joint capsule extended from the anterior rim of the condyle to the roof of the infratemporal fossa but under the foot of the disc they blended with and became indistinguishable from disc fibres.