Micro-CT Evaluation of Root Filling Removal after Three Stages of Retreatment Procedure

Autor(es)

Ricardo Abreu da Rosa ^[1] ; Manuela Favarin Santini ^[2] ; Bruno Cavalini Cavenago ^[3] ; Jefferson Ricardo Pereira ^[4] ; Marco Antônio Húngaro Duarte ^[5] ; Marcus Vinícius Reis Só ^[6]

Afiliação do(s) autor(es)

^[1] UFRGS - Universidade Federal do Rio Grande do Sul. Department of Conservative Dentistry - Brasil

^[2] UFRGS - Universidade Federal do Rio Grande do Sul. Department of Conservative Dentistry - Brasil

^[3] USP - Universidade de São Paulo. Dental School of Bauru. Department of Endodontics - Brasil

^[4] UNISUL - Universidade de Santa Catarina do Sul. Dental School. Department of Prosthodontics - Brasil

^[5] USP - Universidade de São Paulo. Dental School of Bauru. Department of Endodontics - Brasil

^[6] UFRGS - Universidade Federal do Rio Grande do Sul. Department of Conservative Dentistry - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Dental Journal; v. 26, n. 6, p. 612-618, 2015-12-00.

Resumo

The aim of this study was to quantify the residual filling material after filling removal, re-preparation with rotary or reciprocating files and passive ultrasonic irrigation (PUI). Twenty maxillary molars were prepared using ProTaper instruments up to F1. The teeth were filled with AH Plus and ProTaper gutta-percha points using the single-cone technique. Thereafter, the specimens were scanned using a micro-computed tomography system (Micro-CT #1). Then, the root canal filling was removed using ProTaper Retreatment files, and a new scan was performed (Micro-CT #2). The specimens were divided into two groups according to the instrument used for re-preparation: ProTaper rotary or WaveOne reciprocating files (Micro-CT #3). Finally, PUI was performed, and a new micro-CT scan was performed (Micro-CT #4). Intragroup and intergroup analyses were performed using Friedman and Dunn's post hoc test and the Kruskal-Wallis and Dunn post hoc tests, respectively. Palatal canal presented the highest volume of residual filling material in all stages of endodontic retreatment (p<0.05). The main reduction of filling volume was achieved after using ProTaper Retreament (p<0.05). The amount of remaining filling material after using ProTaper Retreatment was similar to that achieved with rotary and reciprocating files and after PUI (p>0.05). Rotary and reciprocating files achieved similar removal of the root canal filling (p>0.05). The greatest reduction in filling material was achieved after using ProTaper Retreatment files. Rotary and reciprocating instruments and PUI did not improve the removal of root canal filling materials. (AU)

• Processo FAPESP: 10/16072-2 - Microtomógrafo (MicroTC) no estudo da anatomia dental e nos procedimentos endodônticos
• Beneficiário: Clovis Monteiro Bramante
• Modalidade de apoio: Auxílio à Pesquisa - Regular