An in vitro comparison of micro leakage in three glass ionomer cements used as retrograde filling materials.
The aim of this study was to evaluate the sealing ability of conventional self-cured glass ionomer cement, silver glass ionomer cement and light-cured glass ionomer cement as retrofilling materials. Micro-leakage was assessed by introducing the samples into a 1 per cent solution of methylene blue for eight days at a constant temperature of 37 degrees C. Dye penetration was greater when silver glass ionomer cement was used in comparison to the other two materials tested; the difference was statistically significant. Conversely, the sealing ability of light-cured glass ionomer cement was significantly higher than that of conventional glass ionomer cement. The condition of the dentine-filling material interface and the marginal adaptation of the glass ionomer cements under study were assessed using scanning electron microscopy.
Rosales
J I
JI
Vallecillo
M
M
Osorio
R
R
Bravo
M
M
Toledano
M
M
D016722:Cermet Cements / Q000737:chemistry; D004396:Coloring Agents; D001840:Dental Bonding; D003763:Dental Leakage / Q000175:diagnosis*; D018772:Dental Marginal Adaptation; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008751:Methylene Blue; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials / Q000737:chemistry*
D016722:Cermet Cements; D004396:Coloring Agents; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D012387:Root Canal Filling Materials; C061499:Ketac-Bond; C067790:Vitrabond; D008751:Methylene Blue