Clinical features and cranio-maxillofacial structure in 55 patients with idiopathic condyle resorption
China Journal of Oral and Maxillofacial Surgery
2022, 20 (6):
PURPOSE: To investigate the clinical and imaging features of craniomaxillofacial structures in patients with idiopathic condyle resorption(ICR). METHODS: A total of 55 ICR patients and 55 skeletal Class Ⅱ patients with healthy temporomandibular joint (control group) were collected in Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine from January 2010 to December 2018. The gender, age, unilateral and bilateral incidence of ICR patients and related joint symptoms were statistically analyzed, and the clinical characteristics of ICR patients were analyzed. The cranial-maxillofacial structures of the two groups were compared by using two-dimensional cephalometry and three-dimensional reconstruction. SPSS 25.0 software package was used for data analysis. RESULTS: The proportion of female patients with ICR was 92.7%, the mean age was 22.17±3.46 years old, the incidence of bilateral joint was 87%, 29.1% of patients had joint symptoms. Two-dimensional measurement showed that SNA, A-NP, Co-A, SNB, GO-Me, Co-GO and S-Go/N-Me indicators in ICR group were significantly lower than those in the control group(P<0.05), while MP-SN and Y-axis were significantly higher than those in the control group (P<0.05), there was no significant different in S-N between the two groups(P>0.05). The measured values of ICR group were all lower than those of the control group except SE-NE, COR-AE and SNLP-GOL, and the difference was statistically significant (P<0.05). CONCLUSIONS: ICR usually occurs in women, with an average age of 22 years. The lesions mostly involve bilateral joints, and less than 1/3 of patients have joint symptoms. Compared with the skeletal Class Ⅱ patients with healthy joints, ICR has the cranio-maxillofacial structural characteristics of severe retraction of the mandible, shorter mandibular body and mandibular ramus, and most of them are in the state of high angle, the high posterior-anterior ratio is significantly smaller, and the maxillary protuberance is not obvious.
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