Effect of canal preparation with XP-endo Shaper and ProTaper Next on root canal geometry and dentin thickness of mandibular premolars with radicular grooves and two canals: a micro-CT study

Autor(es)

Cerqueira, Nathalia Mancioppi ^[1] ; Louzada, Victoria Gabriela ^[1] ; Silva-Sousa, Yara Teresinha Correa ^[1] ; Raucci-Neto, Walter ^[1] ; Leoni, Graziela Bianchi ^[1]

Afiliação do(s) autor(es)

^[1] Univ Ribeirao Preto, Sch Dent, Ave Costabile Romano 2201, BR-14096900 Ribeirao Preto, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CLINICAL ORAL INVESTIGATIONS; v. 25, n. 9, p. 5505-5512, SEP 2021.
• Citações Web of Science: 0

Resumo

Objectives This study aimed to evaluate the effects of different shaping protocols on the root canal geometry and remaining dentin thickness of mandibular premolars with radicular grooves (RG) and two canals by means of micro-CT. Materials and methods Mandibular premolars with RG and two canals were matched based on their similar morphological dimensions and assigned to 2 experimental groups according to the canal preparation (n=8): XP-endo Shaper (XPS) and ProTaper Next (PTN) systems. Before and after preparation, morphometric measurements of the volume, surface area, structure model index, area, perimeter, roundness, major and minor diameters, as well as untouched canal walls, canal transportation, and dentin wall thickness were evaluated. Data were statistically compared within and between groups using the independent sample t test (alpha=5%). Results XPS revealed less changes in volume, surface area, area, perimeter, and major and minor diameters (P<0.05). There was no significant difference in structure model index (SMI), roundness, and percentage of untouched canal walls between groups (P>0.05). XPS resulted in less apical canal transportation and a higher remaining dentin thickness toward the RG compared to PTN in lingual canals (P<0.05). Conclusions XPS revealed fewer changes in root canal geometry as well as lower transportation and a greater remaining dentin thickness in the lingual canals toward the RG compared to PTN. (AU)

• Processo FAPESP: 18/23913-5 - Avaliação por meio de microtomografia dos efeitos de diferentes protocolos de preparo biomecânico na anatomia interna e externa de pré-molares inferiores com sulcos
• Beneficiário: Nathália Mancioppi Cerqueira
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica