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Condylocoronal angle of the human mandible--its radiological implications
D N Bailoor1, M Muralidhar, A D Moola
1Oral Medicine, KMC, College of Dental Surgery, Mangalore.
Summary
This study measured temporomandibular joint (TMJ) dimensions and condylo coronal angles (CCA) in an Indian population. Findings provide radiological guidance for TMJ imaging and diagnosis.
Area of Science:
- Anatomy
- Radiology
- Orthodontics
Background:
- Accurate temporomandibular joint (TMJ) imaging is crucial for diagnosis.
- Standardized anthropometric and radiological measurements are needed for precise TMJ assessment.
Purpose of the Study:
- To establish anthropometric and condylo coronal angle (CCA) values for the TMJ in an Indian population.
- To provide radiological guidelines for optimizing TMJ tomographic cuts and radiographic views.
Main Methods:
- Anthropometric measurements of 26 dry mandible specimens.
- Standardized SMV radiography of 26 living subjects.
- Measurement of anteroposterior and mediolateral dimensions, and CCA values.
Main Results:
- Average TMJ anteroposterior dimension: 8.5 mm; mediolateral dimension: 17 mm.
- Average condylo coronal angle (CCA) in Indian subjects: 17 degrees.
- Dry specimen CCA: 18 degrees (left) and 16 degrees (right).
Conclusions:
- Tomographic cuts at 8-9 mm depth may improve TMJ diagnostic accuracy.
- A 17-degree horizontal angulation for CCA can enhance transpharyngeal and transcranial TMJ views.