Resistance to fracture of simulated external cervical resorption using NeoMTA 2 and Biodentine cements. In Vitro Study

Objective The aim of this study is to compare the fracture resistance of simulated 2Cd external resorptions with two different bioceramics cements, NeoMTA 2 and Biodentine. Methodology : Sixty single-rooted mandibular premolars were divided into 4 groups: Control group (healthy teeth); Group 2: teeth with 2Cd cervical resorption class; Group 3: teeth with 2Cd cervical resorption sealed with Biodentine cement; Group 4: teeth with class 2Cd cervical resorption sealed with NeoMTA2 cement. All groups underwent evaluation of compressive forces at 8 and 30 days, measured in Newtons using a Universal machine LG CMT – 5L (Nanchang Howard Technology Co.,Ltd, China). The t-student, Shapiro Wilk and Tukey statistical tests were used using the SPSS 27 Software. Results After 8 days all groups showed a statistical difference (p < 0.05). Group 3 had greater compressive strength capacity than groups 2 and 4, but lower than the control group. At 30 days, groups 3 and 4 did not present a statistical difference, but they had values higher than group 2 (teeth with cervical resorption without repair) and lower than the control group. Conclusions According to the conditions of the study, there was no significant statistical difference in resistance to compressive forces between Biodentine and NeoMTA2 cements at 30 days. Clinical relevance : The use of Biodentine and NeoMTA2 cements as a repair materials are recommended. However, future research is needed to determine the most suitable repair material for resorption cavities with different classifications.