Occlusal variables are only moderately useful in the diagnosis of temporomandibular disorder

Differences between centric relation and maximum intercuspation as possible cause for development of temporomandibular disorder analyzed with T-scan III

Objective:

To compare subjects from the group with fixed dentures, the group who present temporomandibular disorders (TMDs) and a control group considering centric relation (CR) and maximum intercuspation (MIC)/habitual occlusion (Hab. Occl.) and to analyze the related variables also compared and analyzed with electronic system T-scan III.

Materials and Methods:

A total of 54 subjects were divided into three groups; 17 subjects with fixed dentures, 14 with TMD and 23 controls-selection based on anamnesis-responded to a Fonseca questionnaire and clinical measurements analyzed with electronic system T-scan III. Occlusal force, presented by percentage (automatically by the T-scan electronic system) was analyzed in CR and in MIC.

Results:

Data were presented as mean ± standard deviation and differences in P < 0.05 were considered significant. After measurements of the differences between CR and MIC in the three groups were noticed varieties but the P > 0.05 it was not significant in all three groups.

Conclusion:

In our study, it was concluded that there are not statistically significant differences between CR and MIC in the group of individuals without any symptom or sign of TMD although there are noticed in the group with TMD and fixed dentures disharmonic relation between the arches with overload of the occlusal force on the one side.

[Stress, coping and craniomandibular disorders - a longitudinal study]

OBJECTIVES

Stress is widely accepted as an etiologic factor of craniomandibular disorders (CMD). There is, however, a lack of studies evaluating the significance of interindividual differences of stress and coping for the development of CMD.

METHODS

99 volunteers (33 male, 66 female) were observed over a period of 24 months. The clinical examination at the beginning and end of the observation time were carried out according to the protocol of the Research Diagnostic Criteria for Temporomandibular Disorders (Dworkin 1992). Data concerning stress and general body complaints were evaluated twice by questionnaires, and data on coping methods were collected at the beginning of the study.

RESULTS

Stress, coping methods and general body complaints correlate with clinical functional parameters. Stress and body complaints proved to be significant predictors via linear regression analyses.

CONCLUSIONS

Stress and general somatic complaints are predictors of the development of craniomandibular disorders.