Evaluating periodontal probing depth and furcation involvement on the endodontic treatment of maxillary fourth premolar complicated crown-root fractures in 122 teeth.

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This study aimed to evaluate the prognosis of root canal treatment (RCT) in dogs with complicated crown-root fractures (CCRFs) of the maxillary fourth premolar (PM4), focusing on the impact of periodontal probing depth (PPD) and furcation involvement on treatment outcomes. The study analyzed 122 PM4 teeth affected by CCRF in dogs. The primary outcomes were the success rates of RCT, measured against PPD, and the degree of furcation involvement (stages F0, F1, and F2). The PPD was measured preoperatively to assess its correlation with treatment prognosis. The analysis revealed that RCT outcomes were poor when PPD reached or exceeded 5.43 mm at the F0 stage of furcation involvement. Similarly, poor prognoses were associated with a PPD of 4.60 mm or more at the F1 stage and 3.76 mm or more at the F2 stage. These findings indicate a significant relationship between PPD, furcation involvement, and the success of RCT in CCRF-affected PM4 teeth. Both PPD and furcation involvement are critical factors influencing the success rate of RCT in dogs with CCRF-affected PM4 teeth. When considering RCT for such cases, these parameters should be carefully evaluated to optimize treatment outcomes. This study highlights the importance of assessing PPD and furcation involvement in the decision-making process for RCT in dogs with CCRF of the PM4 teeth, providing valuable insights for veterinary dental practitioners.