Ng, Yuan;
Gulabivala, Kishor;
Bryce, Graeme;
Smith, Richard B;
Dermont, M;
(2022)
An eight year retrospective study investigating tooth survival after primary non-surgical root canal treatment in a United Kingdom military cohort.
BMJ Military Health
(In press).
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Abstract
Introduction: Root canal treatment plays an important role in preserving the dentition by deferring other invasive treatments. Data on tooth survival and predictive factors for tooth loss after root canal treatment in the military cohort is lacking. This investigation aimed to determine the proportion of teeth surviving in an 8 year period after root canal treatment (RCT) and identify potential predictive factors for tooth loss, in a United Kingdom military cohort. / Methodology: A retrospective review of an integrated electronic health record (iHR) for military patients who had received RCT was performed in a random sample of 205 patients (n = 219 root-filled teeth) that had received RCT between 01 January 2011 and 01 January 2012. Tooth survival was defined as tooth presence, regardless of signs or symptoms, and measured from the point of root-filling until either the end of the designated study period or time of extraction. Survival was evaluated using Kaplan-Meier estimates and association with tooth loss using the Chi-squared test. Potentially significant predictive factors were investigated using univariate Cox regression. / Results: Tooth survival following RCT was: 98% after 24 months; 88% after 48 months; 83% after 72 months and 78% after 96 months. Four predictive factors were found to affect tooth loss as follows: pre-operative pain (hazard ratio [HR] = 3.2; P < 0.001), teeth with less than 2 proximal contacts (HR = 3.0; P = 0.01), teeth with cores involving more than two surfaces (HR = 2.0; P = 0.03); and post-operative unscheduled dental attendances (UDA) (HR = 2.7; P = 0.01). / Conclusions: Within the limitations of this study, the presence of pre-operative pain; teeth with less than two proximal contacts or with cores involving more than two tooth surfaces; and occurrence of post-operative unscheduled dental attendance were found to significantly increase the hazard of tooth loss.
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