Temperomandibular Disorder Related Causes - A Short Communication
Received Date: Dec 28, 2017 / Accepted Date: Jan 08, 2018 / Published Date: Jan 11, 2018
Keywords: TMD; Ankylosis; Trauma; Syndromes
TMD signs and symptoms were first discovered by Costen in 1934 . The etiology of TMD has many aspects and can be grouped under initiating factors, predisposing factors and perpetuating factors. Okeson identified dental factors, emotional factors and parafunctional activities as main causes of TMD . Signs and symptoms of TMD are divided into 6 broad groups, such as joint noises, locking, pain and muscle tenderness in head, neck and shoulders, ear complaints and psychological effects .
Diagnostic aids such as MRI, ultrasound, vibratography, sonography, electromyography and thermography are used to confirm TMD. Arriving at the correct diagnosis is sometimes challenging and often leads to misdiagnosis of the condition. The three main groups of TMD are categorized under myofascial pain disorder, disc displacement disorder and degenerative disorder . Identifying the etiology is paramount in treatment of temporomandibular disorders. In order to understand varying etiology we carried out a short literature search of the various conditions that could be associated with TMD.
The aim of this short communication was to reason out the various causes of TMD. Hence, the key terms temporomandibular joint disorders, Treatment, Etiology were used to search PubMed. Only case reports related to TMD from 2013-2017 were reviewed. A total of 277 articles were reviewed, out of which 57 were eliminated due to lack of clarity in regard to the etiology. 220 case reports were screened and the various etiological factors associated with TMD were segregated into local factors, systemic factors and others.
Tables 1 and 2 depict the number of cases under the various local and systemic etiological factors. Figures 1 and 2 highlights the percentages of cases under various categories. The highest numbers of cases in the local causes were observed under malignant and benign conditions, followed by developmental anomalies. Under the systemic causes, the maximum numbers of cases were observed under arthritis and other degenerative conditions, followed by syndromes and muscular and neurological defects.
Table 1: Local causes.
|Arthritis/Other degenerative diseases||18|
Table 2: Systemic causes.
The local causes of TMD observed were categorized under trauma, malignancy, developmental, dental [5-7] due to Para functional  or after orthodontic/multiple restorative treatments, infections and inflammatory conditions. The systemic causes observed were infections, muscular/neurological defects, Syndromes, posture defects , malignancies (Metastasis)  ,genetic/congenital, and arthritis/ other degenerative diseases [9-12]. Apart from the systemic and local factors iatrogenic causes such as extensive and faulty restorations, orthodontic procedures done in haste, cosmetic surgical corrections can cause unstable occlusion in intercuspal position initiating TMD. Any change in anterior guidance, occlusal curvature and vertical dimension can lead to TMD . In yet another aspect many case reports have indicated association between altered head and cervical postures to be cause of TMD .
The syndromes associated with TMD from this review of past five year case reports were Harlequin syndrome (sympathetic nervous system damage), Trichorhinophalangeal syndrome type 1 (genetic) rare autosomal dominant disorder, Gardner’s syndrome (autosomal dominant), Persistent foramen tympanicum Huschke, Proteus syndrome, Red ear syndrome with tinnitus,  Goldenhar syndrome and pain in TMJ, Carey Fineman Ziter syndrome, Ramsay hunt syndrome(after TMJ surgery), Iou Gehrigs disease, Alice in wonderland syndrome, Eagle syndrome, Early lethal Costello syndrome HRAS associated with pulmonary vascular disease and Munch Meyers disease. It is not clear whether theses syndromes can be attributed as etiological factors for TMD. Certain syndromes associated with abnormalities of connective tissue, collagen, muscles and tendons could be considered as conditions which might give rise to TMD.
A number of malignant and benign local and systemic conditions could cause TMJ problems or simply produce TMD symptoms. There have been numerous reports suggesting the misdiagnosis of an underlying condition as a TMD. A proper detailed medical history, examination and diagnosis is essential in proper treatment and hence wellbeing of the patient.
A complete medical, dental and occlusal evaluation needs to be made to confirm the causes for TMD. In 3 case reports TMD was diagnosed but it was malignancy and other muscular diseases which was the underlying cause. Hence, an in depth knowledge in history taking along with clinical evaluation and diagnostic aids are essential to confirm TMD. Apart from these aspects the treatment for TMD should be evidenced based guideline with a multidisciplinary approach.
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Citation: Muthiah L, D’souza J, Kanwal A, George BT (2018) Temperomandibular Disorder Related Causes - A Short Communication. J Dent Sci Med 3: 124.
Copyright: © 2018 Muthiah L, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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