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Variability of centric relation position in TMD patients.

A J J Zonnenberg1, J Mulder

  • 1a.j.j.zonnenberg@xs4all.nl

The European Journal of Prosthodontics and Restorative Dentistry
|April 8, 2006
PubMed
Summary

This study found no significant variability in centric relation position for temporomandibular disorders (TMD) patients compared to controls. The leaf gauge technique demonstrated consistent results for TMD patients, suggesting reliable centric relation records.

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Area of Science:

  • Dental Science
  • Orthodontics
  • Temporomandibular Joint Disorders

Background:

  • The reproducibility of centric relation (CR) position in temporomandibular disorders (TMD) patients is not well-documented.
  • Accurate CR recording is crucial for diagnosing and treating TMD.

Purpose of the Study:

  • To assess the clinical variability of the centric relation position in TMD patients using a muscle-determined technique.
  • To evaluate the reliability of the leaf gauge device for obtaining CR records in TMD patients.

Main Methods:

  • A sample of 60 TMD patients and 12 controls underwent examination using the Research Diagnostic Criteria.
  • Three sequential centric relation records were taken using a leaf gauge, with precision criteria defined for comparison.
  • Analysis of variance (ANOVA) and Scheffe's test were employed to compare within-subject and total variability between groups.

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Main Results:

  • No significant differences were found in condylar displacements (sagittal, transversal, vertical) between TMD patients and control subjects.
  • Variability measures (XMIN, YMIN, ZMIN, XMAX, YMAX, ZMAX, XDIFF, YDIFF, ZDIFF) also showed no significant differences between the groups.
  • The leaf gauge technique demonstrated consistent CR recording in TMD patients.

Conclusions:

  • The study suggests no significant variability in centric relation position between TMD patients and control subjects when using the leaf gauge.
  • The findings indicate that the leaf gauge may be a reliable tool for determining CR in TMD patients, despite their condition.