Journal of Shanghai Jiao Tong University (Medical Science) ›› 2022, Vol. 42 ›› Issue (6): 702-708.doi: 10.3969/j.issn.1674-8115.2022.06.002

• Oral surgery • Previous Articles    

Diagnosis and treatment protocol of temporomandibular joint (TMJ) ankylosis: experience from the TMJ Center of Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine

HE Dongmei(), YANG Chi()   

  1. Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
  • Received:2022-03-02 Accepted:2022-06-12 Online:2022-06-28 Published:2022-08-19
  • Contact: YANG Chi E-mail:lucyhe119@163.com;yangchi63@hotmail.com
  • Supported by:
    National Natural Science Foundation of China(32071313);Science and Technology Commission of Shanghai Municipality Science Research Project(20Y11903900)

Abstract:

Temporomandibular joint (TMJ) ankylosis is characterized by limited mouth opening, facial deformity when it happened during growth and obstructive sleep apnea. It is a refractory disease which will seriously affect the mandibular function and facial appearance of the patients. With the development of new technology and accumulating experience, the treatment results have been significantly improved. Based on the literature review, this paper concludes the surgical treatment experience from the TMJ Center of Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, so as to provide reference for clinicians. In the imaging diagnosis of TMJ ankylosis, CT coronal reconstruction is fundamental for the classification of TMJ ankylosis. It can be divided into four types according to the presence and size of residual condyle structure on the medial side of the bony fusion. In addition, jaw deformities, occlusal relationship disorders and respiratory structural disorders associated with TMJ ankylosis can be further classified. Surgical treatment of TMJ ankylosis includes lateral gap arthroplasty (LAP) and joint reconstruction. When there is a condylar structure medially to the bony fusion, which is greater than or equal to 1/2 of the internal and external diameter of the normal condyle, LAP is selected to preserve the condyle and joint disc structure; other types of joint reconstruction include autogenous bone transplantation, artificial joint reconstruction, distraction osteogenesis, etc. Orthognathic surgery can be performed simultaneously or in the second stage to correct combined jaw deformities. Autologous fat transplantation can significantly reduce the recurrence of TMJ ankylosis.

Key words: temporomandibular joint (TMJ), ankylosis, diagnosis, treatment

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