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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.
Journal of Indian Prosthodontic Society
|January 17, 2014
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.
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.
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