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Comparison of the Short-Term Effectiveness of Hard and Soft Stabilizing Appliances in Treating Patients with Acute Temporomandibular Disc Displacement without Reduction
J Oral Med Pain 2018;43:112-117
Published online December 30, 2018;
© 2018 Korean Academy of Orofacial Pain and Oral Medicine

Hyun-Jeong Park, Ji-Won Ryu, Chang-Lyuk Yoon, Jong-Mo Ahn

Department of Oral Medicine, School of Dentistry, Chosun University, Gwangju, Korea
Correspondence to: Jong-Mo Ahn Department of Oral Medicine, School of Dentistry, Chosun University, 303 Pilmun-daero, Dong-gu, Gwangju 61452, Korea
Tel: +82-62-220-3896
Fax: +82-62-234-2119
Received July 20, 2018; Revised December 6, 2018; Accepted December 7, 2018.
This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Purpose: The aim of this study is to compare the short-term effectiveness of hard and soft stabilizing appliances (H-A and S-A) in treating patients with acute temporomandibular joint (TMJ) disc displacement without reduction (DDwoR).
Methods: Eighty one patients diagnosed as acute TMJ DDwoR at oral medicine of Chosun University Dental Hospital from November 2016 to September 2017 were included in this study. The subjects were divided into three groups: The control group (34 patients treated without occlusal appliance), the H-A group (31 patients treated with H-A) and the S-A group (16 patients treated with S-A). The pain intensity using Visual Analog Scale and maximum mouth opening (MMO) were evaluated every week for 8 weeks.
Results: The improvement of the pain intensity and MMO in the H-A group and the S-A group compared with the control group were noted (p<0.05).
Conclusions: This study suggests that hard and S-As may be equally useful in treating patients with TMJ DDwoR. S-A could be recommended to reduce the symptoms of TMJ DDwoR in short period.
Keywords : Acute temporomandibular joint disc displacement without reduction; Hard stabilizing appliance; Occlusal appliance; Soft stabilizing appliance

March 2019, 44 (1)