Influence of Stabilization Splint Thickness on The Temporomandibular Disorders

Myofascial pain and myofascial pain with limited opening are in the Group I according to the RDC/TMD. I.a Myofascial pain: Reported pain in masticatory muscles (In the jaw, temples, face, preauricular area, or inside the ear, at rest or function) Pain on palpation in at least 3 sites (There are 20 sites (ten on each side): posterior, middle and anterior Temporalis; origin, body and insertion of Masseter; posterior mandibular region; Submandibular region; lateral Pterygoid; tendon of Temporalis), one of them at least in the same side of the reported pain I.b Myofascial pain with limited opening: Myofascial pain Pain-free unassisted 3 opening< 40 mm and Passive 4 stretch ≥ 5 mm

II.a Disc displacement with reduction: No pain in the joint Reproducible (All clicks must be reproduced 2 out of 3 consecutive trials) click on excursion with either opening or closing click With click on opening and closing (unless excursive click confirmed): Click on opening occurs at ≥ 5 mm interincisal distance than on closing Clicks eliminated by protrusive opening II.b Disc displacement without reduction with limited opening: History of locking or catching that interfered with eating Absence of TMJ clicking Unassisted opening (even painful) ≤ 35mm and passive stretch ≤ 4mm Contralateral excursion < 7mm II.c Disc displacement without reduction without limited opening: History of locking or catching that interfered with eating The presence of TMJ sounds excluding DDR clicking Unassisted opening (even painful) > 35mm and passive stretch > 4mm Contralateral excursion ≥ 7mm

Click: A distinct sound, of brief and very limited duration, with a clear beginning and end, which usually sounds like a "click." Opening Click: If upon opening and closing from maximum intercuspation, a click is noted on two of three opening movements, record as positive for opening click. Closing Click: A click present on two of three closing mandibular movements.

The researcher places the edge of the millimeter ruler at the incisal edge of the maxillary central incisor that is the most vertically oriented and measures vertically to the labioincisal edge of the opposing mandibular incisor; records this measurement.