%0 Journal Article
%T Topography of root-end surface after freehand and three-dimensional-guided apicoectomy procedure: A scanning electron microscope study.
%A Damor PR
%A Sharma S
%A Kumar V
%A Chawla A
%A Logani A
%J J Conserv Dent Endod
%V 27
%N 4
%D 2024 Apr
%M 38779202
暂无%R 10.4103/JCDE.JCDE_77_24
%X <B>UNASSIGNED: </B>Dentinal microcracks formed during apical resection may lead to increased susceptibility to root fracture and improper sealing of apical preparation that may negatively influence the outcome of endodontic microsurgery.<BR><B>UNASSIGNED: </B>This study was performed to analyze the root-end surface for dentinal microcracks using a scanning electron microscope (SEM) after resection with high-speed bur and trephine drill.<BR><B>UNASSIGNED: </B>Thirty extracted single-rooted maxillary premolar teeth were selected and randomly distributed into two groups (n = 15). Working length was established using a #15 K-type file. Canals were prepared with a rotary Ni-Ti system to size 30/0.06 using endomotor, irrigated with 3% sodium hypochlorite, dried with paper points, and obturated with gutta-percha cones using a single-cone technique. All samples were mounted on preformed molds and poured using a mixture of sawdust and gypsum. In Group A; tungsten carbide bur was used to perform a freehand apicoectomy. In Group B; a trephine drill was used with a three-dimensional guide to perform 3 mm of root resection. Apicoectomy was performed in both groups under a dental operating microscope. Resected root ends were inspected for microcracks using SEM. The Shapiro-Wilk and Mann-Whitney U-test were used for statistical analysis.<BR><B>UNASSIGNED: </B>Microcracks were observed in all samples in both study groups. Trephine drill produced more microcracks on the resected root surface compared to the use of high-speed tungsten carbide bur with a statistically significant difference (P < 0.05).<BR><B>UNASSIGNED: </B>The trephine drill used during targeted endodontic microsurgery produced more microcracks on the resected root dentine surface compared to the high-speed tungsten carbide bur used during freehand apicoectomy.