Purpose: A new operating method was used to treat traumatic temporomandibular joint (TMJ) ankylosis, to restore the structure of the TMJ, to improve the secondary maxillofacial deformity, and prevent recurrence of TMJ ankylosis. Patients and Methods: Thirty-six patients (20 females, 16 males; aged 5 to 54 years old) with TMJ ankylosis type II or III of 1 to 16 years’ duration, with a maximal mouth opening from 0 to 15 mm preoperatively participated. The new method was to separate bony fusion between condyle and glenoid fossa, remove the condylar fragment that displaced medially or roinferiorly, mobilize the remains of the disc over the condylar stump and suture it with rticular capsule, and shave the surface of the condylar stump and glenoid fossa smooth. Results: Follow-up was performed from 1 to 7 years postoperatively in 21 cases. No recurrences occurred in patients whose TMJ disc was retained during operation. Patients had an average maximal mouth opening of 33.7 mm postoperatively. An 11-year-old patient showed an improved facial symmetry after surgery. Conclusion: By restoring the normal structure of the TMJ and preservation of the disc, recurrence of traumatic TMJ ankylosis and facial deformity in younger patients can be prevented.

目的：应用新的手术方法治疗外伤性颞下颌关节强直，达到恢复颞下颌关节结构，改善面部外形和防止术后复发的目的。方法：外伤性颞下颌关节强直36例，其中男16例，女20例。年龄5～54岁之间，病程1～16年不等，开口度0～1.5cm。手术方法凿开关节窝与髁突之间的骨性融合，凿除前内侧移位的髁突骨折碎片，将残余的关节盘向外牵拉、复位与外侧关节囊缝合，并将髁突与关节窝磨改光滑。结果：术后l7例随访1～7年，保留关节盘手术的病例均无复发，术后开口度平均达到3.36cm。一例11岁的女孩术后3年发现，面部畸形基本恢复正常。结论：恢复颞下颌关节正常结构，保留关节盘在防止外伤性颞下颌关节强直手术后复发中起很重要的作用。

To measure the activity of oxygen free radicals and the level of antioxidant enzyme superoxide dismutase (SOD) in the synovial fluid (SF) of the temporomandibular joints (TMJs) of patients with temporomandibular disorders (TMD). Methods: Thirty-two patients were divided into 3 subgroups: anterior disc displacement with reduction, anterior disc displacement without reduction, and osteoarthrosis. Six healthy volunteers served as controls. A pumping procedure was used to take SF from the superior TMJ space. The concentration of lipid peroxidation products was assessed by means of the thiobarbituric acid reaction, and the level of SOD was assessed with spectrophotometry. Results: SF levels of lipid peroxides (LPO) in the control and patient groups were 0.010 (

Objectives: To analyse systematically the clinical and radiological features of odontogenic ghost cell carcinoma (OGCC). Methods: Clinical and radiological features of 22 OGCCs (4 new and 18 from the literature) were analysed. Results: There were 17 (77%) males and 5 (23%) females (male-to-female ratio of 3.4:1). Ages ranged from 13 years to 72 years (mean 36.7) with a peak in the fourth (40.9%) and fifth (27.3%) decades. The maxilla was involved in 68% and the mandible in 32%. Our study confirmed that OGCC is more prevalent in Asians (12/18) than in other racial groups. The mixed radiolucent and radiopaque lesion pattern was the most frequent (14/19) compared with radiolucent lesions (5/19). 89% (17/19) showed poorly defined borders and 11% (2/19) showed well defined rders. Root resorption was reported in 31% (6/19) of patients and tooth displacements in 21%. Conclusions: OGCC demonstrates clinical and radiographic features of a malignant tumour with high recurrence.