Preoperative MRI detected disk displacement in all 26 patients(35joints)but one(1 joint),the incidence reached upto 97.22%(34/35).

• 在行术前MRI 检查IMCF 患者26例(35侧)中仅1例(1侧)未发现关节盘移位；关节盘移位的发生率为97.；22%25(34/35侧)。