Saudi Cultural Missions Theses & Dissertations
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Item Restricted Tooth Loss in Root Canal Treated Teeth: A Six-year Cross-sectional study(Saudi Digital Library, 2023) Alrumaih, Abdulaziz; Mannocci, FrancescoAim: The aim of this cross-sectional study was to assess and compare tooth loss rates in root canal treated and non-root canal treated teeth with different restorations, and to determine the influence of restoration type on tooth survival rates in a group of patients attending a large NHS hospital. Methodology: This study analysed 1030 orthopantomograms (OPGs) from 515 patients, including baseline (T0) and follow-up (T1) OPGs. Teeth were categorised as root canal treated (RCT) or non-root canal treated (non-RCT) and further subcategorised based on the radiographic restoration type. Comparisons were made between T1 and T0 to assess tooth loss rates. Variables recorded included tooth type, the number of teeth restored at T0, and the number of teeth crowned at T1. Statistical analyses used Wilcoxon's test, Spearman's correlation coefficient, and multi-level logistic regression with generalised estimation equations (GEE) at α = 0.05 significance level. Results: The overall tooth survival rate was 75.5%, with non-RCT teeth showing a higher survival rate of 78.11% compared to RCT teeth, which had a slightly lower survival rate of 64.73%. There was higher tooth loss in 3-s restorations (RCT and non-RCT) compared to 1-s and 2-s (P<0.05). RCT 3-s restorations had an 84% increased failure risk compared with non-root canal treated teeth (OR=1.84, P=0.003). Crowning rate for RCT teeth in the time interval taken into consideration was 4.8%. Gender had no significant association, except in non-RCT 2-s restorations where females had lower failure rates than males (P=0.025). Tooth position (anterior vs. posterior teeth) did not affect survival rates (P>0.05). Conclusion: This study reveals higher tooth loss rates in root canal treated teeth, especially with three surfaces restorations. Age is identified as a risk factor for failure, particularly in root canal treated teeth with crowns.11 0