Occlusal Risk Factors for Temporomandibular Disorders

Selaimen, Caio Marcelo Panitz; Jeronymo, José Carlos Milanez; Brilhante, Diego P; Lima, Eduardo Martinelli Santayana de; Grossi, Patrícia Krieger; Grossi, Márcio Lima

doi:10.2319/0003-3219(2007)077[0471:orfftd]2.0.co;2

Cited by 54 publications

(56 citation statements)

References 26 publications

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“…We observed that the mean depression score was significantly higher in the TMD group than in the control group, in agreement with previous studies [32,33]. Elevated levels of depression have been repeatedly observed in TMD subjects [6,11,18,24,25,38].…”

Section: Discussionsupporting

confidence: 93%

Assessment of somatization in temporomandibular disorders patients with functional somatic syndromes

Klecha¹,

Hafian²,

Laurence³

et al. 2009

J. Stomat. Occ. Med.

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Purpose: The present study addressed the prevalence of functional somatic syndromes (FSS) in temporomandibular disorders (TMD) patients and in control patients. We also investigated the overlap between history of FSS and psychometric data.Patients and methods: We evaluated sociodemographic characteristics, reports of previous FSS, and measures of depression and somatization as determined by the psychometric scales of the Symptom Checklist-90-Revised (SCL-90-R). Samples comprised 56 TMD patients and 103 controls who were routine dental patients.Results: The reports of at least one FSS were significantly more prevalent in TMD patients than in control patients. The former group also reported significantly more frequent occurrences of multiple FSS. The median depression and somatization scores on the SCL-90-R were higher in TMD patients. TMD patients were significantly more frequently classified in the moderate and severe classes of the SCL-90-R somatization scale. The depression and somatization scores were significantly correlated. A significant and positive relationship between the number of reports of FSS and the somatization score was found in both TMD patients and in control patients. The depression score was significantly and positively linked with the incidence of FSS in the control group.Conclusion: TMD patients more frequently report FSS and multiple FSS than routine dental patients. Somatization of TMD patients can be assessed by inquiring as to their history of FSS.

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Section: Discussionsupporting

confidence: 93%

Assessment of somatization in temporomandibular disorders patients with functional somatic syndromes

Klecha¹,

Hafian²,

Laurence³

et al. 2009

J. Stomat. Occ. Med.

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“…However, Caio et al . did not find significant differences between TMD and non‐pain groups on the occlusal variables like overbite, overjet, etc.…”

Section: Introductionmentioning

confidence: 74%

Experimentally created unilateral anterior crossbite induces a degenerative ossification phenotype in mandibular condyle of growing Sprague‐Dawley rats

Zhang

Dai

Lü

et al. 2013

J of Oral Rehabilitation

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The effect of unilateral anterior crossbite on the remodelling of mandibular condyle needs to be investigated. This study aimed to investigate the effects of experimentally created unilateral anterior crossbite on the remodelling of mandibular condyle and explore the changes in the expression of relevant transcription factors and growth factors. The experimental unilateral anterior crossbite was created in 6-week-old female growing rats by bonding metal tubes to the left pairs of incisors. Remodelings of mandibular condylar cartilage was assessed histologically at 2, 4 and 8 weeks. Protein and mRNA levels of Sox9, runt-related transcription factor 2 (Runx2), Osterix (Osx), transforming growth factor beta 1 (TGFβ1), transforming growth factor beta receptor 2 (TGFβr2) and type X collagen (ColX) were investigated by immunohistochemistry and real-time PCR, while alkaline phosphatise (ALP) by histochemistry and real-time PCR. Decreased ratio of hypertrophic cartilage layer was noticed in the 4w experimental group versus controls. At all the time points, the expression of Sox9 and ALP increased but that of TGFβ1 and TGFβr2 decreased in experimental groups (P < 0·05). The expression of Runx2, Osx and Col X increased at 2w, but decrease at 4w (P < 0·05). The results that obvious cartilage degradation and altered expression of related transcription factors and growth factors were detected in the mandibular condyles of the experimental group suggested that the present unilateral anterior crossbite plays an adverse role in the TMJ, and thus leading to the degenerative endochondral ossification.

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“…Reasons for exclusion were described in Table . Search expansion strategies allowed including four additional papers, thus accounting for a total of 25 papers included in the review .…”

Section: Resultsmentioning

confidence: 99%

Temporomandibular disorders and dental occlusion. A systematic review of association studies: end of an era?

Manfredini

Lombardo

Siciliani

2017

J of Oral Rehabilitation

257

183

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To answer a clinical research question: 'is there any association between features of dental occlusion and temporomandibular disorders (TMD)?' A systematic literature review was performed. Inclusion was based on: (i) the type of study, viz., clinical studies on adults assessing the association between TMD (e.g., signs, symptoms, specific diagnoses) and features of dental occlusion by means of single or multiple variable analysis, and (ii) their internal validity, viz., use of clinical assessment approaches to TMD diagnosis. The search accounted for 25 papers included in the review, 10 of which with multiple variable analysis. Quality assessment showed some possible shortcomings, mainly related with the unspecified representativeness of study populations. Seventeen (N = 17) articles compared TMD patients with non-TMD individuals, whilst eight papers compared the features of dental occlusion in individuals with TMD signs/symptoms and healthy subjects in non-patient populations. Findings are quite consistent towards a lack of clinically relevant association between TMD and dental occlusion. Only two (i.e., centric relation [CR]-maximum intercuspation [MI] slide and mediotrusive interferences) of the almost forty occlusion features evaluated in the various studies were associated with TMD in the majority (e.g., at least 50%) of single variable analyses in patient populations. Only mediotrusive interferences are associated with TMD in the majority of multiple variable analyses. Such association does not imply a causal relationship and may even have opposite implications than commonly believed (i.e., interferences being the result, and not the cause, of TMD). Findings support the absence of a disease-specific association. Based on that, there seems to lack ground to further hypothesise a role for dental occlusion in the pathophysiology of TMD. Clinicians are encouraged to abandon the old gnathological paradigm in TMD practice.

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Occlusal Risk Factors for Temporomandibular Disorders

Abstract: Absence of bilateral canine guidance on lateral excursion and particularly Angle Class II malocclusion were considered important risk indicators for the development of TMD in this investigation, even when some sociodemographic factors were considered as effect modifiers.

Cited by 54 publications

References 26 publications

Assessment of somatization in temporomandibular disorders patients with functional somatic syndromes

Assessment of somatization in temporomandibular disorders patients with functional somatic syndromes

Experimentally created unilateral anterior crossbite induces a degenerative ossification phenotype in mandibular condyle of growing Sprague‐Dawley rats

Temporomandibular disorders and dental occlusion. A systematic review of association studies: end of an era?

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