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. 2023 Apr 1;39(4):188-201.
doi: 10.1097/AJP.0000000000001102.

Myofascial Pain as an Unseen Comorbidity in Osteoarthritis: A Scoping Review

Felipe C K Duarte  1   2   3 , Richard Chien  1 , Golnaz Ghazinour  4 , Kent Murnaghan  1 , Daniel W D West  4   3 , Dinesh A Kumbhare  4   5   3
Affiliations

Myofascial Pain as an Unseen Comorbidity in Osteoarthritis: A Scoping Review

Felipe C K Duarte et al. Clin J Pain. .

Abstract

Objective: This review aimed to identify, summarize, and appraise the evidence supporting the coexistence of myofascial pain (MPS) and trigger points (MTrP) in osteoarthritis (OA), and the effectiveness of MTrPs treatments in OA-related pain and physical function outcomes.

Methods: Three databases were searched from inception to June 2022. We included observational and experimental studies to fulfill our 2 study aims. Two independent reviewers conducted 2-phase screening procedures and risk of bias using checklist tools for cross-sectional, quasi-experimental, and randomized control trials. Patient characteristics, findings of active and latent MTrPs in relevant muscles, treatments, and pain and physical function outcomes were extracted from low-risk bias studies.

Results: The literature search yielded 2898 articles, of which 6 observational and 7 experimental studies had a low bias risk and the data extracted. Active MTrPs in knee OA patients was more evident in the quadriceps and hamstring muscles than in healthy individuals. Dry needling on active MTrPs improved pain and physical function in the short term compared with sham treatment in hip OA patients. In knee OA, dry needling on latent or active MTrPs improved pain and functional outcomes compared with sham needling but did not result in better pain and physical outcomes when combined with a physical exercise program.

Discussion: The presence of active versus latent MTrPs seems to be a more sensitive discriminating feature of OA given that latent is often present in OA and healthy individuals. Dry needling on active MTrPs improved pain and physical function in the short term compared with sham treatment in hip OA patients. However, the small sample size and the few number of studies limit any firm recommendation on the treatment.

Registry: The study protocol was prospectively registered in Open Science Framework (https://doi.org/10.17605/OSF.IO/8DVU3).

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Conflict of interest statement

The authors declare no conflict of interest.

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