Comparative study of clinical and MRI features of TMD patients with or without joint effusion: a retrospective study.

"Declarations Ethics approval and consent to participateEthical approval was granted by the Research Ethics committee of the Affiliated Stomatology Hospital of Guangzhou Medical University (LCYJ2022014). The need for written informed consent was waived because of the retrospective nature of this study. All methods were carried out in accordance with relevant guidelines and regulations. Consent for publicationNot applicable. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding This study was supported by the Basic and Applied Basic Research Topics of Guangzhou (SL2022A04J00197) and the Traditional Chinese Medicine Scientific Research Project of Guangdong Province (20232113)."

"Trial registration This study was retrospectively registered on 28/03/2022 and endorsed by the Ethics Committee of Affiliated Stomatology Hospital of Guangzhou Medical University (LCYJ2022014)."