Temporomandibular Disorder in Use of Levonorgestrel Intrauterine System

The TMJ and the masticatory muscles were evaluated by the same clinician. Patients described symptoms such as preauricular pain, limited mouth opening, deviation or deflection during mouth opening, and joint sounds. All patients were assessed using Okeson's Muscle and temporomandibular joint examination and treatment outcome form. This form records (for both TMJ) tenderness and pain in the masseter, temporalis, lateral pterygoid, medial pterygoid, sternocleidomastoid, trapezius, splenius capitis, and digastric muscles, as well as maximum interincisal distance, restriction of laterotrusion and protrusive movements, joint sounds, deviation or deflection during mouth opening, and the visual analogue score (VAS) for pain in the TMJ.