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Comparative Analysis of Root Canal Curvature Measurement Methods for Permanent Mandibular Molars Distal Root: An
Tanu Singh1, Saurav Bathla2, Anuraag Gurtu3
1Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Bareilly International University, Bareilly, Uttar Pradesh, India.
The Journal of Contemporary Dental Practice
|January 12, 2026
Summary
This study compared three methods for measuring mandibular molar distal root curvature. The long axis technique showed the highest curvature in mesiodistal dimensions, crucial for endodontic treatment success.
Area of Science:
- Dentistry
- Endodontics
- Radiology
Background:
- Root canal morphology, particularly curvature, significantly impacts endodontic treatment outcomes.
- Accurate measurement of root canal curvature is essential for preventing procedural complications like ledge formation and perforation.
Purpose of the Study:
- To compare the accuracy of three distinct methods (Schneider's, Weine's, and long axis) in measuring the distal root canal curvature of mandibular molars.
- To evaluate the applicability of these measurement techniques in mesiodistal (MD) and buccolingual (BL) dimensions.
Main Methods:
- Six hundred extracted human mandibular molars were analyzed using periapical radiography.
- Curvature angles were measured using Schneider's, Weine's, and long axis techniques in both MD and BL dimensions.
- Data were digitalized and statistically analyzed using Analysis of Variance (ANOVA).
Main Results:
- Significant differences (p < 0.001) were observed in curvature angle measurements across all techniques and dimensions.
- The long axis technique yielded the highest mean curvature angle in MD dimensions (27.76° ± 27.76).
- Weine's technique recorded the highest mean curvature angle in BL dimensions (16.24° ± 10.81).
Conclusions:
- The long axis technique is most effective for measuring mesiodistal root canal curvature in mandibular molars.
- Weine's technique is most effective for measuring buccolingual root canal curvature.
- Accurate assessment of root canal curvature using standardized methods is vital for successful endodontic therapy.
