P O F Fernandes1, L G Freire2, E F Iglecias2, B R Vieira3, M L Zuolo4, G Gavini5. 1. DDS, Ms., School of Dentistry, University of São Paulo, SP, Brazil. 2. DDS, Ms., PhD, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil. 3. DDS, Ms., School of Dentistry, Federal University of Paraiba, João Pessoa, Paraíba, PB, Brazil. 4. DDS, Ms., PhD, Piracicaba Dental School, State University of Campinas, Piracicaba, SP, Brazil. 5. DDS, Ms., PhD, Professor and Division Head of Endodontics, Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil. Electronic address: ggavini@usp.br.
Abstract
INTRODUCTION: The aim of this study was to compare, using micro-computed tomography, the preparation of mesial canals of mandibular molars with the Reciproc and XP-endo Shaper systems, evaluating changes in dentin and canal volume, the percentage of untouched walls, the volume of accumulated hard tissue debris and root canal deviation in the apical third. METHODS: Twenty-four mandibular molars with two mesial root canals and a single foramen were anatomically paired and divided into two experimental groups (n=12) according to the system used. The specimens were scanned before and after preparation with a SkyScan 1176 microtomograph (Bruker-microCT, Kontich, Belgium) at a resolution of 17.42 μm. The resulting data were statistically compared at a significance level of 5% using Student's t-test and the Mann-Whitney test. RESULTS: A significant difference was observed in untouched surface area for the total canal and for the cervical and middle thirds, with the lowest untouched surface area in the XP-endo Shaper group (P <0.05). The volume of accumulated hard tissue debris was significantly higher in the Reciproc group in the total canal as well as in the middle and apical thirds. There was no significant difference between the groups regarding the volume of dentin removed or the increase in canal volume and surface area (P >0.05). CONCLUSION: The XP-endo Shaper touched more walls and left less accumulated hard tissue debris in the root canal system than did the Reciproc system.
INTRODUCTION: The aim of this study was to compare, using micro-computed tomography, the preparation of mesial canals of mandibular molars with the Reciproc and XP-endo Shaper systems, evaluating changes in dentin and canal volume, the percentage of untouched walls, the volume of accumulated hard tissue debris and root canal deviation in the apical third. METHODS: Twenty-four mandibular molars with two mesial root canals and a single foramen were anatomically paired and divided into two experimental groups (n=12) according to the system used. The specimens were scanned before and after preparation with a SkyScan 1176 microtomograph (Bruker-microCT, Kontich, Belgium) at a resolution of 17.42 μm. The resulting data were statistically compared at a significance level of 5% using Student's t-test and the Mann-Whitney test. RESULTS: A significant difference was observed in untouched surface area for the total canal and for the cervical and middle thirds, with the lowest untouched surface area in the XP-endo Shaper group (P <0.05). The volume of accumulated hard tissue debris was significantly higher in the Reciproc group in the total canal as well as in the middle and apical thirds. There was no significant difference between the groups regarding the volume of dentin removed or the increase in canal volume and surface area (P >0.05). CONCLUSION: The XP-endo Shaper touched more walls and left less accumulated hard tissue debris in the root canal system than did the Reciproc system.
Authors: Tiago Reis; Cláudia Barbosa; Margarida Franco; Catarina Baptista; Nuno Alves; Pablo Castelo-Baz; José Martin-Cruces; Benjamín Martin-Biedma Journal: Int J Environ Res Public Health Date: 2022-06-29 Impact factor: 4.614