Reliability assessment of mandibular range of motion of the Research Diagnostic Criteria of Temporomandibular Disorders – Polish Version

Introduction. An important step in the implementation
of the diagnostic criteria for scientific study is
conducting reliability assessment of mandibular range
of motion of the officially translated and culturally
adapted Polish version of the RDC/TMD. Materials
and Methods. A total of 123 adult patients who were
referred for TMD consultation to the Dental Institute
of Jagiellonian University in Cracow were invited to
participate in the study. The patients were examined
during two sessions with an interval of ten days by
two examiners independently. The examination of the
range of mandibular movements includes: vertical
movements (i.e., unassisted opening without pain,
maximum unassisted opening, maximum assisted
opening), maximum horizontal movements to the left, to
the right, and to the front. Results. For most measures,
ICCs were larger than 0.75, which indicates excellent
reliability. Conclusion. Reliability of mandibular
range of motion of the Polish version of RDC/TMD is
comparable with other world studies.