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An efficacious horizontal angulation separated radiographically superimposed canals in upper premolars with different
Piyanuch Karnasuta1, La-Ongthong Vajrabhaya1, Watcharin Chongkonsatit1
1College of Dental Medicine, Rangsit University, Thailand.
Heliyon
|July 10, 2020
Summary
Adjusting horizontal beam angulation effectively separates superimposed canals in upper premolars. Specific angles, like 25 degrees mesial shift, are optimal for clear radiographic visualization in endodontic treatments.
Area of Science:
- Dentistry
- Radiology
- Endodontics
Background:
- Superimposed root canals in upper premolars pose diagnostic challenges.
- External root morphology significantly influences radiographic interpretation.
Purpose of the Study:
- To evaluate the impact of varying horizontal beam angulations on separating superimposed canals.
- To identify optimal angulations for different upper premolar root morphologies.
Main Methods:
- Three upper premolar root morphologies (one-root, fused-root, two-root) were examined.
- Thirteen horizontal angulations (0°, and mesial/distal shifts of 15-40°) were tested.
- Radiographic separation of canals at the apex and 5mm from the apex was assessed.
Main Results:
- Increasing angulation generally improved canal separation.
- Mesial angulations provided greater separation distances than distal angulations.
- Specific angulations (e.g., 20-40° mesial/distal) achieved 100% separation in two-root and fused-root teeth.
Conclusions:
- Ideal angulations for superimposed canal visualization are 35° mesial for one-root, 20° distal/mesial for fused-root, and 15° mesial/20° mesial for two-root teeth.
- 25° mesial shift is recommended for optimal separation and image quality in endodontic and prosthodontic procedures.
