Effects of Dimensions of Root-End Fillings and Peripheral Root Dentine on the Healing Outcome of Apical Surgery

Abstract

Objective: The objective of this study was to assess dimensions of root-end fillings (REFs), as well as peripheral root dentine (PRD) and their effects on the healing outcome of apical surgery.Methods: Cone beam computed tomography (CBCT) scans were utilized to measure the REF length andwidth and the PRD thickness in 61 roots of 53 teeth 1 year after apical surgery. Measurements were taken inthe mesio-distal as well as bucco-lingual directions. The REF alignment with respect to the root axis was alsoevaluated. In addition, the dimensions of REF and PRD were assessed for possible correlations with the healing outcome. Criteria for determining the healing outcome included clinical and radiographic parameters.Results: The mean REF length was 2.02±0.52 mm. No significant differences were observed with regard totooth groups, but one-canal roots had a significantly longer mean REF than two-canal roots (P=0.006). Themean REF widths were 1.14±0.24 mm mesio-distally and 2.61±1.24 mm bucco-lingually. Roots with twocanals presented a significantly wider REF (P