Treating Bruxism-Related Muscle Spasm and Malocclusion: An Intervention Study Using Local Anesthetic without Vasoconstrictor
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Abstract
Background: Hyperactivity of the masticatory muscles and acute malocclusion in bruxism are problematic conditions that are usually misdiagnosed as occlusal disorders. The therapeutic efficacy of local anesthetic infiltration without a vasoconstrictor in local anesthesia cases is still dubious.
Objective: To assess the clinical impact of 2% lidocaine infiltration without vasoconstrictor in bruxism-related masticatory muscle hyperactivity and acute malocclusion, and to determine the impact of dental restorations on the response of treatment.
Methods: The clinical interventional study was carried out in a sample of 20 patients (29-40 years), in the form of two groups: Group A (with restorations) and Group B (without restorations), this time. Everyone was infiltrated at the deepest point of the most tender point of the masseter muscle with 2% lidocaine without vasoconstrictor. The measures were assessed using pain (VAS), muscle tenderness, and occlusal stability at baseline, 30 minutes, 24 hours, and 2-3 months. The chi-square and Fisher's exact tests were used to analyze the data.
Results: In Group B (100%), all patients improved completely and sustained, and none in Group A responded. The difference between them was very high (χ² = 16.20, p < 0.001; Cramer’s V = 0.90).
Conclusion: Local infiltration of plain lidocaine is an effective method to decrease the hyperactivity of muscles and restore the occlusal balance in acute malocclusion due to bruxism in the absence of occlusal interferences. This is an easy, inexpensive technique that can be of much use as an addition to the treatment of muscle-origin occlusal disturbances.
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Bruxism, Myofacial pain dysfunction syndrome, Acute malocclusion, Lidocaine without vasoconstrictor, Occlusal interference.
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