Research Article Analyzing Menton Deviation in Posteroanterior Cephalogram in Early Detection of Temporomandibular Disorder Trelia Boel, 1 Ervina Sofyanti, 2 and Erliera Sufarnap 2 1 Department of Dental Radiology, Faculty of Dentistry, University of Sumatera Utara, Medan, Indonesia 2 Department of Orthodontics, Faculty of Dentistry, University of Sumatera Utara, Medan, Indonesia Correspondence should be addressed to Trelia Boel; trelia.boel@usu.ac.id Received 22 April 2017; Accepted 3 July 2017; Published 6 August 2017 Academic Editor: Izzet Yavuz Copyright © 2017 Trelia Boel et al. Tis is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Introduction. Some clinicians believed that mandibular deviation leads to facial asymmetry and it also had a correlation with temporomandibular disorders (TMDs). Posteroanterior (PA) cephalogram was widely reported as a regular record in treating facial asymmetry and craniofacial anomalies. Te objective of this study was to analyze the relationship of menton deviation in PA cephalogram with temporomandibular disorders (TMDs) symptoms. Materials and Methods. TMJ function was initially screened based on TMD-DI questionnaire. PA cephalogram of volunteer subjects with TMDs ( = 37) and without TMDs ( = 33) with mean age of 21.61 ± 2.08 years was taken. Te menton deviation was measured by the distance (mm) from menton point to midsagittal reference (MSR) horizontally, using sofware digitized measurement, and categorized as asymmetric if the value is greater than 3 mm. Te prevalence and diference of menton deviation in both groups were evaluated by unpaired -test. Result. Te prevalence of symmetry group showed that 65.9% had no TMDs with mean of 1,815 ± 0,71 mm; in contrast, the prevalence of asymmetry group showed that 95.5% reported TMDs with mean of 3,159 ± 1,053 mm. Tere was a signifcant diference of menton deviation to TMDs ( = 0.000) in subjects with and without TMDs. Conclusion. Tere was a signifcant relationship of menton deviation in PA cephalogram with TMDs based on TMD-DI index. 1. Introduction Te relevance of temporomandibular disorders (TMDs) to malocclusion became a hot issue in recent years. TMDs are a collective complex term for a group of musculoskeletal and neuromuscular conditions which includes several clinical signs and symptoms involving the muscles of mastication, temporomandibular joint, and associated structures [1, 2]. Te displacement of mandible can infuence the modeling process of the TMJ, leading to asymmetry. Even though a small amount of asymmetry in the maxillofacial region is common, there is a critical threshold distance that is consid- ered as asymmetric [3–6]. At the same time many authors have shown no or weak connection between orthodontics treatment and TMDs. Malocclusion itself is a product of multiple factors that yields a signifcant infuence on the patient’s quality of life during craniomandibular growth and development even though, until aging, it can be treated by orthodontics or orthognathic surgery. Te mandibular asymmetry is a major problem due to its efect on facial appearance directly, espe- cially the chin area that represents the third lower facial part. Tere is an impact on the quality of life because functional problems that related to the role of temporomandibular joint are in the stomatognathic system and also afect the facial appearance, such as facial asymmetry [7, 8]. In daily practice, posteroanterior cephalogram is used widely in detection of asymmetry mandible that involved skeletal and dentoalveolar component [9]. Investigating the connection between morphologically anatomy landmarks with sign and symptom of TMDs has been a more interesting question than debating about malocclusion causes of TMDs or vice versa. Recent study reported sign and symptom of TMD as main risk factor in the occurrence of mandibulofacial asymmetry [10]. Asymmetry in mandibular usually results in a shif of the chin and 70% of patients with facial asymmetry and chin Hindawi International Journal of Dentistry Volume 2017, Article ID 5604068, 5 pages https://doi.org/10.1155/2017/5604068