The significance of the criterion represented by the ratio of the crown size to the size of residual root part as a component of the functional teeth’s prognosis after the apicoectomy procedure
DOI:
https://doi.org/10.32782/2786-7684/2025-2-1Keywords:
apicoectomy, root apex resection, endodontium, periodontium, periodontal attachment, diagnostics, biomechanics, tooth, assessment criteria, prognosis, endodontic treatmentAbstract
Introduction. Apicoectomy is a component procedure of surgical endodontic interventions, which by definition leads to a decrease in root length, and therefore to a violation of the initial ratio of crown size to root size. However, there is still a lack of strictly targeted studies in the literature that would allow to quantify the significance of this ratio as a criterion for predicting the functioning of the teeth after the performed manipulation of root apical resection.Purpose of the study. To analyze a pool of targeted scientific studies related to the significance of changes in the ratio of crown height to residual root length after the apicoectomy procedure, as a criterion for biomechanical prediction of tooth functioning after performed surgical endodontic interventions.Research methods. The search for target publications was carried out using various combinations of keywords «crown root ratio», «tooth», «biomechanics», «prognosis», «endodontic surgery», «root end resection», «apicoectomy» and their equivalents in Ukrainian.Scientific novelty. The data accumulated during the processing of the previous studies’ results indicate that the ratio of crown size to root size should not be regarded as a reliable isolated predictor for the biomechanical prognosis of the tooth after the root apex resection procedure, if functionally acceptable residual area of p eriodontal attachment is available and there is no signs of its progressive loss.Conclusions. The indicator of periodontal attachment loss in the coronal part of the root is more significant determinant for the prognosis of the further tooth functioning after the apicoectomy procedure than the indicator of clinical attachment loss in the apical part of the root due to resection itself, if provided resection length was up to 6 mm (under favorable occlusal conditions), or if the residual root length is 7 mm. The crown-to-root ratio parameter is not an evidence-based predictor of tooth survival after apicoectomy (if functionally acceptable area of r esidual periodontal attachment is available), but this criterion can potentially impact the prognosis of the root apex resection success in the long term.
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