Análise microtomográfica da mineralização induzida por cimentos biocerâmicos reparadores após pulpotomia

• DOI: https://doi.org/10.22533/at.ed.0172421055

• Palavras-chave: Biomineralização; Endodontia; Microtomografia por Raio-X; Pulpotomia

• Keywords: Biomineralization; Endodontics; Pulpotomy; X-Ray Microtomography.

• Abstract: The aim of this study was to evaluate the mineralization ability of Biodentine and Angelus White MTA when compared to calcium hydroxide. Thirty-six Wistar rats underwent pulpotomy of the lower right and left first molars (n=6). After anesthesia, access to the pulp chamber was performed with a carbide bur at high speed with the aid of an operating microscope, followed by pulp removal, performed with an adapted curette. After removing the coronary pulp, the pulp chamber was irrigated with saline solution until hemostasis. Pulp capping was performed with Biodentine, Angelus White MTA or calcium hydroxide paste with aqueous vehicle and the crown was restored with glass ionomer. Microtomographic analysis (SKY SCAN 1174) was performed after 7, 15 and 30 days, where longitudinal and transversal sections were made to measure the largest area of ​​mineralized tissue observed in the distal canal lumen, using the CTan software. After obtaining the areas, the values ​​were tabulated and submitted to the ANOVA and Tukey statistical tests, with a significance level of 5%. The results obtained showed that Biodentine induced on average the formation of 0.656 µm2 at 7 days, 0.705 µm2 at 15 days and 0.675 µm2 at 30 days. Calcium hydroxide induced 0.383 µm2, 0.556 µm2 and 0.533 µm2 at 7, 15 and 30 days, respectively. Angelus White MTA induced 0.269 µm2 at 7 days, 0.205 µm2 after 15 days and 0.410 µm2 at the end of the experimental period. All materials induced the formation of a biomineralized hard tissue bridge. Biodentine induced the largest mineralization area followed by calcium hydroxide and MTA, and can be considered an alternative to MTA or calcium hydroxide in cases of pulpotomy.