Physicochemical properties of calcium silicate-based formulations MTA Repair HP and MTA Vitalcem.

Autor:	Guimarães BM; Università di Bologna, Dipartimento di Scienze Biomediche e Neuromotorie, Laboratorio di Biomateriali e Patologia Orale, Bologna, Italia.; Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, São Paulo, Brasil., Prati C; Università di Bologna, Dipartimento di Scienze Biomediche e Neuromotorie, Laboratorio di Biomateriali e Patologia Orale, Bologna, Italia.; Università di Bologna, Reparto di Endodonzia del Dipartimento di Scienze Odontostomatologiche, Bologna, Italia., Duarte MAH; Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, São Paulo, Brasil., Bramante CM; Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, São Paulo, Brasil., Gandolfi MG; Università di Bologna, Dipartimento di Scienze Biomediche e Neuromotorie, Laboratorio di Biomateriali e Patologia Orale, Bologna, Italia.
Jazyk:	angličtina
Zdroj:	Journal of applied oral science : revista FOB [J Appl Oral Sci] 2018 Apr 05; Vol. 26, pp. e2017115. Date of Electronic Publication: 2018 Apr 05.
DOI:	10.1590/1678-7757-2017-0115
Abstrakt:	Objective: This study aimed to analyze the following physicochemical properties: radiopacity, final setting time, calcium release, pH change, solubility, water sorption, porosity, surface morphology, and apatite-forming ability of two calcium silicate-based materials. Material and Methods: We tested MTA Repair HP and MTA Vitalcem in comparison with conventional MTA, analyzing radiopacity and final setting time. Water absorption, interconnected pores and apparent porosity were measured after 24-h immersion in deionized water at 37°C. Calcium and pH were tested up to 28 d in deionized water. We analyzed data using two-way ANOVA with Student-Newman-Keuls tests (p<0.05). We performed morphological and chemical analyses of the material surfaces using ESEM/EDX after 28 d in HBSS. Results: MTA Repair HP showed similar radiopacity to that of conventional MTA. All materials showed a marked alkalinizing activity within 3 h, which continued for 28 d. MTA Repair HP showed the highest calcium release at 28 d (p<0.05). MTA Vitalcem showed statistically higher water sorption and solubility values (p<0.05). All materials showed the ability to nucleate calcium phosphate on their surface after 28 d in HBSS. Conclusions: MTA Repair HP and MTA Vitalcem had extended alkalinizing activity and calcium release that favored calcium phosphate nucleation. The presence of the plasticizer in MTA HP might increase its solubility and porosity. The radiopacifier calcium tungstate can be used to replace bismuth oxide.
Databáze:	MEDLINE
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