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Impact of temporomandibular joint pain on activities of daily living in patients with rheumatoid arthritis

The aim of this study was to investigate the impact of temporomandibular joint (TMJ) pain on daily living in patients with rheumatoid arthritis (RA) involving the TMJ. Nineteen patients (17 F, 2 M) with a median (IQR) age of 44 (23) years were included. A scale for the influence of TMJ pain/discomfort on the activities of daily living was used. TMJ resting pain and pain upon maximum mouth opening according to a visual analog scale as well as pressure pain threshold and tenderness to digital palpation of the TMJ were assessed. Blood samples were collected to measure the level of acute phase proteins. Activities of daily living were influenced in all patients at different levels. The impact on daily living by TMJ pain/discomfort was greatest on the performance of physical exercises and jaw movements, while it was smallest on the performance of hobbies and eating. Pain during maximum mouth opening and tenderness to digital palpation were correlated to difficulties with several activities such as to yawn and open the mouth wide, while pressure pain threshold was correlated with difficulties during eating, which confirms that the pain was located in the TMJ. In conclusion, this study indicates that pain/discomfort from the TMJ in patients with RA has a significant negative impact on activities of daily living