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Age changes in horizontal condylar angle: a clinical and cephalometric study.

T Sreelal1, Kavitha Janardanan2, Amal S Nair3

  • 1Department of Prosthodontics, Sree Mookambika Institute of Dental Sciences, Kulasekharam, Tamilnadu India ; Sreesobha, IInd house, High school road, Kazhakuttom P.O, Trivandrum, 695582 Kerala India.

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PubMed
Summary

Horizontal condylar inclination decreases with age, indicating a flattening of the condylar head. Both articulator and cephalometric methods accurately measure this angle, showing no significant difference between them.

Keywords:
CephalometryDentatus articulatorHorizontal condylar angle

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Area of Science:

  • Dental anatomy and occlusion
  • Biomechanical aspects of jaw movement
  • Age-related changes in craniofacial structures

Background:

  • Accurate determination of horizontal condylar inclination is crucial for effective occlusal rehabilitation.
  • Understanding age-related trends in condylar inclination aids in predicting cuspal morphology changes.
  • Existing methods for measuring condylar inclination require comparative analysis for reliability.

Purpose of the Study:

  • To assess the impact of aging on horizontal condylar inclination using both articulator and cephalometric techniques.
  • To compare the accuracy and reliability of the articulator method versus the cephalometric method for measuring condylar inclination.
  • To evaluate the symmetry of the horizontal condylar angle in dentulous individuals across different age groups.

Main Methods:

  • Selected 40 dentulous individuals with Angle's Class I occlusion, divided into four age groups (20-59 years).
  • Measured horizontal condylar inclination using protrusive interocclusal records on a semi-adjustable articulator (Dentatus ARL).
  • Acquired cephalometric radiographs in centric and protrusive positions, analyzing condylar position relative to the Frankfurt horizontal plane.

Main Results:

  • Analysis of variance (ANOVA) revealed statistically significant differences in horizontal condylar angle values across the four age groups.
  • A consistent decrease in horizontal condylar angle values was observed from the youngest (20-29 years) to the oldest (50-59 years) group.
  • No significant difference was found between the horizontal condylar inclination values obtained by the articulator method and the cephalometric method.
  • Symmetry analysis showed insignificant differences between the right and left sides for horizontal condylar angle values on the articulator.

Conclusions:

  • Horizontal condylar inclination exhibits a decreasing trend with advancing age, correlating with a flattening of the condylar head.
  • Both the articulator method and cephalometric method are reliable and yield comparable results for determining horizontal condylar inclination.
  • The symmetry of the horizontal condylar angle is generally maintained on both sides of the articulator.