Effectiveness and safety of three NiTi systems in endodontic retreatment of MB1 and MB2 root canals: a micro-CT and CBCT combined analysis

Autor(es)

Santos Jr, Airton Oliveira ; Fontenele, Rocharles Cavalcante ; Tavares, Karina Ines Medina Carita ; Torres, Fernanda Ferrari Esteves ; Pinto, Jader Camilo ; Rosim, Pedro Luis Busto ; Goncalves, Andrea ; Duarte, Marco Antonio Hungaro ; Guerreiro-Tanomaru, Juliane Maria ; Tanomaru-Filho, Mario

• Tipo de documento: Artigo Científico
• Fonte: CLINICAL ORAL INVESTIGATIONS; v. 29, n. 4, p. 15-pg., 2025-03-19.

Resumo

Objective To evaluate the performance in endodontic retreatment and pericervical dentin preservation using ProDesign Logic (PDL), Reciproc Blue (RB), and WaveOne Gold (WOG) NiTi systems in first (MB1) and second (MB2) mesiobuccal root canals of maxillary molars, using cone-beam computed tomography (CBCT) and micro-computed tomography (micro-CT). Materials and methods MB1 and MB2 canals were prepared, filled, and randomized into four groups (n = 8). MB1 were retreated using PDL up to file 40/0.05 or RB R40 (40/0.06), while MB2 were retreated using PDL up to file 35/0.05 or WOG (35/0.06). Micro-CT scans were performed before and after retreatment to assess the remaining filling material, canal transportation, and canal centralization. Dentin removal and remaining dentin were measured at four levels below the furcation through CBCT scans analyzed with the e-Vol DX software, with micro-CT serving as the reference standard. Results RB was more effective than PDL in removing MB1 filling material, while PDL outperformed WOG in the apical third of MB2 (p < 0.05). Overall, CBCT measurements for dentin removal were consistent with micro-CT in MB1 but occasionally underestimated in MB2 (p < 0.05). A significant reduction in MB2 danger zone dentin thickness below 0.5 mm was observed after retreatment (p < 0.05). Conclusions RB was more effective in retreating MB1, while PDL was more efficient in the apical third of MB2. A substantial decrease in dentin thickness in the MB2 danger zone was noted after retreatment, regardless of the NiTi system or imaging modality used. Overall, CBCT scans provided consistent assessments of dentin. (AU)

• Processo FAPESP: 20/11012-3 - Avaliação comparativa entre micro-CT e TCFC empregando o software e-Vol DX na análise de obturação em canais ovais e espessura dentinária em canais MV1 e MV2 de molares superiores após preparo e retratamento
• Beneficiário: Airton Oliveira Santos Junior
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 23/13106-3 - Desenvolvimento de medicações intracanal, guta-percha e cimento endodôntico com silicato tricálcico, biosilicato e associações. Avaliação das propriedades físico-químicas, biológicas e antimicrobianas
• Beneficiário: Juliane Maria Guerreiro Tanomaru
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 22/13774-3 - Algoritmo orientado por inteligência artificial para segmentação automática de estruturas endodônticas em imagens de tomografia computadorizada de feixe cônico
• Beneficiário: Airton Oliveira Santos Junior
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 21/11496-3 - Síntese de novo biomaterial reparador, avaliação de materiais de silicato de cálcio e análise do efeito da aplicação de biovidro no tratamento da dentina e revestimento da Guta percha na interação com cimentos obturadores biocerâmicos
• Beneficiário: Mario Tanomaru Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 20/11011-7 - Características físico-químicas e biológicas do clínquer com diferentes tamanhos de partículas e de cimentos reparadores e obturadores à base de silicato de cálcio
• Beneficiário: Karina Ines Medina Carita Tavares
• Modalidade de apoio: Bolsas no Brasil - Doutorado