Evaluation of pH and calcium ion release of new root-end filling materials.
OBJECTIVE
The purpose of this study was to evaluate the pH and calcium ion release of 6 materials used for root-end filling and perforation repair.


METHODS
Gray ProRoot MTA, gray MTA-Angelus, white MTA-Angelus, and CPM were compared to 2 experimental ones: MTA-exp, also based in Portland cement with a modified mixing liquid, and MBPc, an epoxy-resin based cement containing calcium hydroxide. After 3, 24, 72, and 168 hours the water in which each sample had been immersed was tested to determine the ph and calcium ion release.


RESULTS
All the analyzed materials showed alkaline pH and capacity to release calcium ions; however, a tendency of reduction of these characteristics was noted for all the analyzed materials, except for the MBPc, which showed a slight increase of pH among the 3 initial periods.


CONCLUSIONS
The results suggest that all materials investigated presented alkaline pH and ability of release of calcium ions.
de Vasconcelos
Bruno Carvalho
BC
Department of Endodontics, Brazilian Dental Association-Ceará Session, Ceará, Brazil. bcv@usp.br
Bernardes
Ricardo Affonso
RA
Cruz
Suyane M Luna
SM
Duarte
Marco Antonio Húngaro
MA
Padilha
Pedro de Magalhães
Pde M
Bernardineli
Norberti
N
Garcia
Roberto Brandão
RB
Bramante
Clóvis Monteiro
CM
de Moraes
Ivaldo Gomes
IG
D000468:Alkalies / Q000737:chemistry; D017607:Aluminum Compounds / Q000737:chemistry; D001466:Barium Sulfate / Q000737:chemistry; D001729:Bismuth / Q000737:chemistry; D002118:Calcium / Q000737:chemistry*; D002119:Calcium Carbonate / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry; D002126:Calcium Hydroxide / Q000737:chemistry; D003738:Dental Cements / Q000737:chemistry; D004338:Drug Combinations; D004853:Epoxy Resins / Q000737:chemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry; D013054:Spectrophotometry, Atomic; D014867:Water / Q000737:chemistry
D000468:Alkalies; D017607:Aluminum Compounds; D017610:Calcium Compounds; D003738:Dental Cements; D004338:Drug Combinations; D004853:Epoxy Resins; D010087:Oxides; D019279:Resin Cements; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; D014867:Water; D001466:Barium Sulfate; C033301:bismuth oxide; D002119:Calcium Carbonate; D002126:Calcium Hydroxide; D002118:Calcium; D001729:Bismuth