Comparison of Lidocaine, Mepivacaine, and Dry Needling in Myofascial Pain Syndrome

Dry needling applied to bilateral active trigger points in the masseter and temporalis muscles once per week for three weeks.

Lidocaine (20 mg/mL) injected into each active trigger point in the masseter and temporalis muscles once per week for three weeks.

Mepivacaine (30 mg/mL) injected into each active trigger point in the masseter and temporalis muscles once per week for three weeks.