Tehran University of Medical Sciences Journal of Craniomaxillofacial Research 2345-5489 11 1 2024 08 18 Oral Health-Related Quality of Life in Temporomandibular Disorder Patients Treated with Stabilization Splint 42 48 EN Amirtaher Mirmortazavi Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran. Davood Aghasizadeh Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran. Farnaz Nazerzadeh Student Research Committee, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran. Iman Shiezadeh Student Research Committee, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran. 2024 03 06 2024 04 11 Introduction: The study aims to evaluate the oral health index related to the quality of life in patients with temporomandibular disorder (TMD) referred to the Mashhad School of Dentistry between 2018 and 2019 before and three months after treatment. Materials and Methods: This observational prospective study was conducted by interviewing patients with temporomandibular joint (TMJ) pain and clicking who referred to the Department of Prosthodontics, Mashhad Dental School, Iran, between 2018 and 2019. The demographic information of 63 patients was recorded separately. Then, using the Persian version of the OHIP-14 and GHQ-28 questionnaire, the quality of life in patients with TMD was compared before and three months after stabilization splint treatment. To evaluate the quality of life, the OHIP-sum index was used, and finally, the obtained data were analyzed by SPSS software using the Mann-Whitney test, paired-sample t-test, and Wilcoxon test. Results: OHIP sum was 24.31±8.82 and 13.15±9.52, before and after the intervention respectively. The GHQ sum was 33.32±12.9 and 20.71±11.07 before and after the intervention respectively, showing a significant decrease. The most problems of the stabilization splint users were related to psychological discomfort and the least common problems were related to functional limitations. Conclusion: The treatment of TMD using stabilization splints can significantly increase the oral health-related quality of life (OHRQoL) in these patients. Keywords: Oral health-related quality of life (OHRQoL); Temporomandibular disorders (TMD); Stabilization splint (SS). https://jcr.tums.ac.ir/index.php/jcr/article/view/493 https://jcr.tums.ac.ir/index.php/jcr/article/download/493/405