Abstract: Objective: To investigate the correlation between temporomandibular joint disc perforation and condylar bone changes. Methods: A total of 224 patients with temporomandibular joint arthrography were taken CBCT in our hospital for temporomandibular joint disorders. According to the arthrography results, the patients were divided into four groups, which were disc perforation with condylar bone changed group, disc perforation and condylar bone unchanged group, disc unperforated and condylar bone unchanged group, articular disc not perforated and condylar bone changed group. We explored the relevance between disc perforation and condylar bone changes. Results: There was a significant correlation between temporomandibular joint disc perforation and condylar bone changes (OR=21.28,P<0.05). Among the eight types of condylar bone changes, condylar hyperosteogeny was the most relevant to disc perforation(OR=4.22,P<0.05). Conclusion: There is a significant correlation between temporomandibular joint disc perforation and condylar bone changes. Condylar hyperosteogeny is most likely to be associated with perforation, but the order of perforation of the disc and condylar bone changes remains to be further studied.

Key words: arthrography, disc perforation, condylar bone changes