OBJECTIVE: To evaluate the benefits of hyaluronic acid intraarticular injection (HA IAI), in conjunction with minimally invasive surgery (arthrocentesis or arthroscopy), as a therapeutic option for temporomandibular joint disorders. METHODS: An electronic search in PubMed, Cochrane Library, and Scopus databases was conducted in order to answer the following PICOS question: "In clinical trials with patients treated with arthroscopy or arthrocentesis, did the subsequent use of HA IAI provide a better control of postoperative pain and temporomandibular joint function compared to those patients who did not receive it?" RESULTS: Following PRISMA criteria, six randomized controlled clinical trials were selected. HA IAI showed significant differences in terms of pain reduction in three of them and improvement of mandibular function in two, compared to the control group. CONCLUSION: Based on scientific evidence, the level of recommendation found regarding this type of intervention is type B (recommendation based on inconsistent or limited-quality patient-oriented evidence).
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