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Cephalometric analysis: comparisons between maximum intercuspation and centric relation.

E H Williamson, S A Caves, R J Edenfield

    American Journal of Orthodontics
    |December 1, 1978
    PubMed
    Summary
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    Cephalometric analysis reveals that mandibular position (centric relation vs. maximum intercuspation) offers no reliable prediction for tooth deflection in preorthodontic patients. Slight measurement differences exist, with Class II malocclusions showing the largest discrepancies.

    Area of Science:

    • Orthodontics
    • Dental Morphology
    • Cephalometrics

    Background:

    • Accurate diagnosis in orthodontics relies on understanding jaw and tooth relationships.
    • Cephalometric radiography is a standard tool for assessing craniofacial structures.
    • Mandibular positioning, specifically the difference between centric relation and maximum intercuspation, can influence cephalometric measurements.

    Purpose of the Study:

    • To evaluate the clinical utility of cephalometric analysis in predicting mandibular deflection.
    • To compare cephalometric measurements taken with the mandible in maximum intercuspation versus centric relation.
    • To identify patient groups, if any, exhibiting significant discrepancies between these two mandibular positions.

    Main Methods:

    • Cephalometric analyses were performed on 46 preorthodontic patients.

    Related Experiment Videos

  • Measurements were taken with the mandible in maximum intercuspation.
  • The same analyses were repeated with the mandible in centric relation using a Centric-Ceph device.

    • Main Results:

    • No clinically significant predictions regarding mandibular deflection could be made from cephalometric radiographs.
    • Minor differences in cephalometric measurements were observed between the two mandibular positions.
    • The most substantial discrepancies were noted in patients with Class II malocclusions.

    Conclusions:

    • Cephalometric radiographs are not clinically useful for predicting mandibular deflection between centric relation and maximum intercuspation.
    • While cephalometric measurements differ slightly between mandibular positions, these variations are generally not clinically significant.
    • Orthodontists should be particularly attentive to Class II malocclusion cases, as they may exhibit larger discrepancies requiring specific diagnostic articulation.