pH level and biocompatibility of white Portland cement

ABSTRACT www.scielo.br/jaoshttp://dx.doi.org/10.1590/1678-775720130059     pH level and biocompatibility of white Portland cement Marina Angelica MARCIANO, Roberto Brandao GARCIA, Bruno Cavalini CAVENAGO, Paloma Gagliardi MINOTTI,   ˘ ˇˆ˙˝˝˛˚  ˜! " #$˘! Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP, Brazil. Corresponding address: Marina Angelica Marciano - Faculdade de Odontologia de Bauru - USP - Al. Octavio Pinheiro Brisolla, 9-75 - 17012-901 - Bauru - SP - Brazil - e-mail: marinangelica@usp.br ˆ%& ˙’()*++4*;˚ ˙ ˙’?%)+@+4*D O bjectives: To investigate if there is a relation between the increase of bismuth oxide  ˘  ˇ   ˆ ˙ ˝Material and Methods: White Portland cement (WPC) was mixed with 0, 15, 20, 30 and ˛˚˜   ! " #˝$ ˘! ˆˆ "ˇ" the cements and immersed in Milli-Q water for 15, 30 and 60 days. After each period, the increase of the pH level was assessed. For the biocompatibility, two polyethylene  ˇ" "  ˆ %&’*˝+ˆ   ˆ   ˆ ˇ" /˛!4˚’˚ˆ˝+statistical analysis was performed using the Kruskal-Wallis, Dunn and Friedman tests for the pH level and the Kruskal-Wallis and Dunn tests for the biological analysis (p 0.05). The 15% 9˙; " # ˇ   ˆ ˇ /˛ 4˚’˚days (p<0.05). Conclusions: The addition of bismuth oxide into Portland cement did not affect the pH level and the biological response. The concentration of 15% of bismuth oxide  # ˇ  ˆ  "  concentrations evaluated.