Sealing ability of MTA and amalgam in different root-end preparations and resection bevel angles: an in vitro evaluation using marginal dye leakage

Brazilian Dental Journal

Letícia Kirst Post²  Fábio Garcia Lima¹  Cristina Braga Xavier¹  Flávio Fernando Demarco¹  Marília Gerhardt-oliveira¹ 

[1] ,Federal University of Pelotas Dental School Santa Maria RS ,Brazil

关键词: apicoectomy;    apical microleakage;    dental materials;    retrofilling;   

DOI  :  10.1590/S0103-64402010000500007

来源: SciELO

【 摘 要 】

This in vitro study evaluated the effect of different apicoectomy angles, instruments used in root-end preparation, and dental materials used in retrofilling on apical sealing. Root ends were resected at 45 or 90 degrees in 80 single-rooted teeth. For each type of apicoectomy, root-end cavities were prepared with either a round carbide #2 bur or an S12/90D ultrasonic tip. The root-end cavities in each subgroup (apicoectomy + root-end preparation) were filled with silver amalgam without zinc (Am) or with gray mineral trioxide aggregate -Angelus (MTA), and the specimens were immediately immersed in 0.2% rhodamine B for 24 h. Sealing was evaluated based on the dyed cross-sectional dentin area. Data were analyzed statistically by the Kruskal-Wallis test at 5% significance level. No group showed complete sealing of root-end areas. The only significant factor affecting microleakage was dental material, with MTA exhibiting less leakage.

【 授权许可】

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