CAJ | 학술논문

目的通过磁共振成像了解无症状志愿者颞下颌关节关节盘位置的类型及其与年龄和性别的关系.方法 100名无症状志愿者分5组(11岁～、21岁～、31岁～、41岁～、51～60岁),每组男女各10名;利用Siemens Trio Tim 3.0 T磁共振扫描系统对双侧颞下颌关节进行开闭口斜矢状位扫描,共200侧关节;对每侧关节中间层及其相邻内、外各一层磁共振图像进行视觉诊断.结果 100名无症状志愿者中59名(59.0%)双侧关节盘位置正常.关节盘位置正常、关节盘前移位和隐匿性前移位的关节侧数分别为140侧(70.0%)、14侧(7.0%)和46侧(23.0%),在5个年龄组及不同性别之间的分布比较,差异均无统计学意义(P＞0.05).受试者最大开口度平均为(46.3±5.5)mm,不同关节盘位置的受试者间最大开门度比较,差异无统计学意义(P＞0.05).结论在无症状志愿者中颢下颌关节盘移位确实存在,其分布与年龄和性别无关;盘移位以隐匿性前移位为主;关节盘移位的影像学表现与临床症状之间不存在确定的相关关系.
목적 통과자공진성상료해무증상지원자섭하합관절관절반위치적류형급기여년령화성별적관계.방법 100명무증상지원자분5조(11세～、21세～、31세～、41세～、51～60세),매조남녀각10명;이용Siemens Trio Tim 3.0 T자공진소묘계통대쌍측섭하합관절진행개폐구사시상위소묘,공200측관절;대매측관절중간층급기상린내、외각일층자공진도상진행시각진단.결과 100명무증상지원자중59명(59.0%)쌍측관절반위치정상.관절반위치정상、관절반전이위화은닉성전이위적관절측수분별위140측(70.0%)、14측(7.0%)화46측(23.0%),재5개년령조급불동성별지간적분포비교,차이균무통계학의의(P＞0.05).수시자최대개구도평균위(46.3±5.5)mm,불동관절반위치적수시자간최대개문도비교,차이무통계학의의(P＞0.05).결론 재무증상지원자중호하합관절반이위학실존재,기분포여년령화성별무관;반이위이은닉성전이위위주;관절반이위적영상학표현여림상증상지간불존재학정적상관관계.
Objective To investigate the types of disc position of the temporomandibular joint (TMJ)and their relationship with age and gender in asymptomatic volunteers by magnetic resonance imaging (MRI).Methods A total of 100 asymptomatic volunteers were divided into 5 groups(11-,21-,31-,41-,51-60 years old),10 male and 10 female were included in each group.A total of 200 TMJs were scanned with Siemens Trio Tim 3.0T MRI system oblique-sagittally at closed- and open-mouth positions.Visual evaluation of MR images were performed on 3 neighbour slices of each TMJ(lateral,central,medial).Results There was a normal disc-condyle relationship in 59 of the 100 asymptomatie subjects.The normal disc position,anterior disc displacement and insidious anterior disc displacement(IADD)were observed in 140(70.0%),14(7.0%)and 46(23.0%)joints respectively,which showed no significant differences among different age groups or between genders(P＞0.05).The maximum mouth opening of the 100 asymptomatic volunteers was(46.3±5.5)mm,with no significant difference among the various types of disc position(P＞0.05). Conclusions Disc displacement does exist in the asymptomatic volunteers,however,its occurrence is not associated with age and gender.IADD is the main type of the disc displacement in asymptomatic volunteers.There is no close relationship between the imaging manifestation of the disc displacement and clinical symptoms.