Postitional changes of the mandibular condyle assessed by three-dimensional computed tomography

Donald A. Tyndall, Jordan B. Renner, Ceib Phillips, Stephen R. Matteson

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


This investigation was designed to test the validity and reliability of three-dimensional computed tomography (3-D CT) for quantification of positional changes of the condyle in a laboratory model. The model consisted of a mounted dried human skull and a mandibular condyle attached to a micromanipulator. Controlled changes in condylar position were made and the condyle/fossa was imaged. Positional changes were measured by triangulation methods based on specific 3-D CT landmarks. The data were analyzed using descriptive statistics, analyses of variance to evauate the sources of variability, and linear contrasts to evaluate the differences between observed and expected values. The results indicated that selection of appropriate anatomic landmarks for assesment of movement influences technique accuracy. The data also indicate that 3-D CT is most accurate in detecting inferior condylar movements. Lateral and posterior movements were assessed with less accuracy than the inferior positional changes. The clinical significance of these differences has yet to be determined.

Original languageEnglish (US)
Pages (from-to)1164-1172
Number of pages9
JournalJournal of Oral and Maxillofacial Surgery
Issue number11
StatePublished - Nov 1992

ASJC Scopus subject areas

  • Surgery
  • Oral Surgery
  • Otorhinolaryngology


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