Evaluation of regional nerve block efficacy in the treatment of myofascial pain of masseteric origin: Clinical Study

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Amr Abotaleb Elrefaie, Mohammed Ahmed El-Sholkamy, Mohammed Hassan Eid

Keywords

Myofascial Pain; Temporomandibular Disorder; Maximal Mouth Opening

Abstract

Myofascial pain dysfunction syndrome (MPS) is considered the most common temporomandibular disorder (TMD) and one of stress-related disorders that defined as a complex, non-articular and non-inflammatory musculoskeletal disorder that affects the masticatory muscles. Objective: to evaluate the regional nerve block efficacy in the treatment of myofascial pain of massetric origin. Patients and methods: This study included 30 healthy patients were randomly divided into two equal groups, fifteen patients each, Group A consisted of 15 patients who injected by local anesthesia at the masseteric nerve (nerve block). Group B consisted of 15 patients who injected by local anesthesia at trigger points in the masseter muscle. Standard pain scoring (VAS) and the maximal mouth opening (MMO) were measured. Results: Comparison between VAS for pain severity at all-time intervals in both group indicated that the groups were similar at baseline (T1) and (T2) time intervals without significant difference (p>0.05). After intervention at T3 time interval a significant reduction in group A of mean VAS compared to group B (p<0.05). At the rest of follow up sessions (T3, T4), there were statistically insignificant differences between two groups (p>0.05).Comparison between MMO at different assessment sessions in both groups showed that the groups were similar at T1 and T2 time intervals without significant difference (p>0.05). After intervention at T3 time interval, group B showed significantly higher mean MMO compared to group A (p<0.05). At the rest of follow-up intervals (T4), there were statistically insignificant differences between both groups (p>0.05). Conclusion: Masseteric nerve block, TrPs injection with local anesthetic methods are effective treatment modalities in masseteric myofascial pain treatment.MNB has a beneficial effect in managing pain that originates from the masseter muscle, MNB injection with local anesthetic are more effective

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