Improving the Radiopacity of Calcium Aluminate Cement Based Blends

Author(s)

Ivone Regina de Oliveira ^[1] ; Gabriela do Vale Vieira ^[1] ; Kennedy Wallace dos Santos ^[1] ; Leandro José Raniero ^[4] ; Larissa Moreira Castro-Raucci ^[3] ; Paulo Tambasco de Oliveira ^[3] ; Celso Israel Fornari ^[4] ; Victor Carlos Pandolfelli ^[5]

Affiliation

^[1] Univ Vale Paraiba, Inst Pesquisa & Desenvolvimento, Ave Shishima Hifumi 2911, Sao Jose Dos Campos, SP - Brazil

^[2] Universidade do Vale do Paraíba. Instituto de Pesquisa e Desenvolvimento - Brasil

^[3] Univ Sao Paulo, Fac Odontol Ribeirao Preto, Ave Cafe S-N, Ribeirao Preto, SP - Brazil

^[4] Inst Nacl Pesquisas Espaciais, Lab Associado Sensores & Mat, BR-12245970 Sao Jose Dos Campos, SP - Brazil

^[5] Univ Fed Sao Carlos UFSCar, Dept Engn Mat, Rod Washington Luiz, Km 235, Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 21, n. 2 2018-01-22.

Abstract

The radiopacity of CAC-based compositions containing additives (ZnO, Ag and Bi2O3) was evaluated by optical density measurements, cold crushing strength, apparent porosity, pore size distribution, in vitro apatite-formation ability (bioactivity) and cell viability. The bioactivity was assessed via pH and calcium concentration measurements in simulated body fluid (SBF) for samples previously treated or not with sodium silicate (SS) solution. The surface of the samples after treatment was analyzed by scanning electron microscopy, energy dispersive X-ray analysis and confocal Raman spectroscopy. Cell viability was evaluated by MTT and alkaline phosphatase (ALP) activity. Radiopacity results confirmed that compositions containing ZnO-Ag (25:1 wt%) and ZnO-Bi2O3 (15:10 wt%) presented suitable values of radiopacity (> 3 mmAl). The identification of calcium and mainly phosphorus by EDX, highlighted the generation of an apatite-like layer on the compositions' surface after immersion in SBF or SBF/SS. CAC-blend containing 25 wt% ZnO, ZnO-Ag and ZnO-Bi2O3 presented slightly lower cell viability compared to the positive control. (AU)

• FAPESP's process: 16/22366-5 - Study of the properties of the topological insulator Bi2Te3 grown by molecular beam epitaxy
• Grantee: Celso Israel Fornari
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 16/15032-3 - IN VITRO AND IN VIVO CHARACTERIZATION OF CALCIUM ALUMINATE CEMENT-BASED BLENDS FOR APPLICATION IN THE REPAIR AND REGENERATION OF BONE TISSUE
• Grantee: Ivone Regina de Oliveira
• Support Opportunities: Regular Research Grants