37例颞下颌关节盘不可复性前移位患者自然转归的临床及磁共振成像特征分析OA北大核心CSTPCD

Objective This study aims to investigate clinical outcomes,imaging changes,and age differences with re-gard to temporomandibular joint disc condylar complex with anterior disc displacement without reduction(ADDWoR).Methods A total of 37 patients(45 lateral joints)with ADDWoR who were admitted to The First Affiliated Hospital of Zheng Zhou University from January 2016 to June 2023 were selected.The patients were composed of 4 males and 33 females and had an average age of 23.5 years.The average course of the disease was 14.4 months.Clinical and magnetic resonance imaging(MRI)data were collected at the end of initial diagnosis and follow-up,and the length and thickness of the articular disc,the angle of the disc con-dyle,and the height of the condyle were measured.The statistical significance of the changes was assessed using SPSS 25.0 software package.Results At the end of follow-up,disc displacement in three patients(three lateral joints)was healed.Approximately 48.4%of the patients felt that limi-tation of mandibular movement was not alleviated;58.3%of patients reported that pain during mouth opening was not re-duced;54.5%reported pain while chewing;33.3%of the patients showed facial deviation,and only one showed remis-sion.The mean disk-condyle angle increased from 61.63° to 67.81°.The average length of articular disc shortened from 8.20 mm to 7.27 mm,and the height of the condyle significantly decreased from 23.17 mm to 22.76 mm(P<0.05).The absorption ratio of the condyle increased,and no significant differences in the changes of joint soft and hard tissues be-tween the adolescent and adult groups(P>0.05).Conclusion In different age groups of patients with ADDWoR,clini-cal symptoms cannot be completely relieved.The disc is anteriorly displaced and shortens,condylar height decreases,and secondary facial asymmetry and mandibular retraction occur.