Influence of Canal Curvature Measurements Techniques on the Prevalence and Location of File Separation, Determined by Using an Image Analysing Software - A Retrospective Study. | ||
| Alexandria Dental Journal | ||
| Articles in Press, Corrected Proof, Available Online from 28 September 2025 PDF (283.24 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/adjalexu.2024.329142.1551 | ||
| Authors | ||
| Ashraf M Zaazou* 1; Emad Khattab2; Atheer Alghamdi3; Arwa Abdulraheem Alghamdi4 | ||
| 1Professor of Endodontics, Faculty of Dentistry, King Abdelaziz University, KSA Professor of Endodontics ,Faculty of Dentistry, Alexandria University | ||
| 2King Abdelaziz University, Jeddah, Saudi Arabia | ||
| 3King Abdulaziz university | ||
| 4King Abdulaziz University | ||
| Abstract | ||
| . Objective: To evaluate the effect of the canal curvature on the prevalence and location of instrument separation during RCT by using an image analysing software. Methodology: 138 periapical radiographs with separated files were taken from patients who were treated at KAUDH. The radiographs were analysed by two independent examiners using AutoCAD 2021 software. Multiple variables were collected from the radiographs, and the correlation between them were analysed. Results: Instrument separation primarily seen in mandibular molars (55.7%) and mainly in the MB canal (26.8%). 73% of the sample size had the level of curvature located in the middle third, while the level of instrument separation was mainly in the apical third (69.1%). Chi-square showed no correlation between the level of curve and level of separation. The mean degrees of the curvature angle was seen highest when using Weine’s technique followed by Schneider, then the LA. Schneider technique was significantly associated with coronally positioned curvatures while the LA was with apically positioned curves. The average radius of curvature was 3.4mm. Moreover, there was a significant moderate negative correlation between the radius and angle of curvature when using Schneider and Weine’s techniques. Conclusion: Weine technique can raise the difficulty assessment from moderate to high, which suggests that these cases should be referred to specialists. Coronal curvatures are better assessed using Schneider's technique, while apical curvatures are represented better with the LA technique. Furthermore, a small radius of curvature could also have a high impact on the prevalence of instrument separation. | ||
| Keywords | ||
| Radius of Curvature; Angle of Curvature; Instrument Separation | ||
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