ABSTRACT
Abstract Objective: To assess the tensile bond strength of prefabricated metal posts cemented with different luting agents. Material and Methods: Fifty single-rooted endodontically treated human teeth had their crowns cut, mounted into acrylic-resin blocks and then an 8mm depth post space were prepared. Prefabricated cylindrical metal posts were cemented using different luting agents: a zinc phosphate cement (SS White), a conventional glass ionomer cement (Vidrion C), two resin-modified glass ionomer cements (Vitremer and RelyX Luting 2) and a resin cement (RelyX ARC). Samples were stored in distilled water for seven days and then submitted to a tensile bond strength test until complete dislocation of the post. One-way analysis of variance and Tukey test for pairwise multiple comparisons were used to evaluate differences between luting agents. Results: Tensile bond strength was 563.88±203.41 N for zinc phosphate cement, 336.86 ± 137.64 N for Vidrion C, 515.24 ± 239.48 N for Vitremer, 828.47±433.99 N for RelyX Luting 2 and 1262.51 ± 356.29 for RelyX ARC. The Relyx ARC presented the highest tensile bond strength regard the luting agent tested (p< 0.05). Conclusion: RelyX ARC presented the higher tensile bond strength compared to the other luting agents evaluated.
Subject(s)
Tensile Strength , Resin Cements , Dental Cements , Glass Ionomer Cements , Zinc Phosphate Cement , Brazil/epidemiology , Analysis of Variance , Statistics, Nonparametric , Tooth, Nonvital/diagnosis , Dental PinsABSTRACT
Objetivo: Descrever reabilitações com coroas biológicas por meio de dois casos clínicos, um dente anterior e um posterior. Material e Método: O estudo apresenta dois casos clínicos em que reabilitações de dentes extensamente destruídos foram realizadas. Em um dos casos é apresentada a reabilitação do dente 14 e no seguinte uma reabilitação simultânea dos dentes 21 e 22. Em ambos os casos foram utilizados dentes humanos provenientes de um banco de dentes humanos (BDH). Para a seleção dos dentes, utilizou-se como parâmetros os diâmetros dos dentes a serem reabilitados, bem como as medidas do dente homólogo contralateral. Os dentes obtidos junto a BDH foram seccionados, a coroa biológica esvaziada e então reembasada com resina composta sobre um modelo de gesso obtido dos pacientes. Após o reembasamento e ajustes oclusais ainda no modelo de gesso, as coroas foram cimentadas com cimento resinoso. Resultados: Em ambos os casos clínicos, os pacientes foram reabilitados adequadamente, de forma rápida e com custo reduzido. Conclusão: Restaurações biológicas podem ser utilizadas para reabilitação de dentes permanentes anteriores e posteriores; além de estimular o correto descarte de futuros dentes extraídos, sendo esses destinados a bancos de dentes humanos.
Objective: To describe rehabilitations with biological crowns by two clinical cases, one anterior and one posterior. Methods: The study presents two clinical cases in which extensively damage teeth were rehabilitated. In one, the rehabilitation of tooth 14 is presented and, in the other, a simultaneous rehabilitation of teeth 21 and 22 was performed. In both cases, human teeth from a human tooth bank (HTB) were used. For teeth selection, the diameters of the teeth to be rehabilitated, as well as, the measurements of the contralateral homologous tooth were used as parameters. The teeth obtained with HTB were sectioned, the biological crown emptied and then relined with composite resin on cast obtained from the patients. After the reline and occlusal adjustments, the crowns were cemented with resin cement. Results: The patients were rehabilitated properly, quickly and with reduced cost. Conclusion: Biological restorations can be used for rehabilitation of anterior and posterior permanent teeth; besides to stimulate the correct discard of extracted teeth, being these destined to human teeth banks.