IADR Abstract Archives

Remineralization Effect of GIC with Release of Calcium and Phosphate

Objectives: Compare the remineralization effect of three glass ionomer cements (GICs) which release calcium and phosphate. Remineralization was measured using microhardness. Material groups were: (1) GC Fuji VII EP (EP) conventional GIC incorporates with Recaldent^TM(casein phosphopeptide-amorphous calcium phosphate: CPP-ACP), (2) Riva Protect (RP) conventional GIC incorporates with amorphous calcium phosphate, (3) 3M ESPE Vanish XT (XT) resin modified GIC incorporates with calcium glycerophosphate.

Methods: Bovine incisor enamel was cut mounted in acrylic resin and then enamel surface polished. Each specimen was covered with 0.1 mm thick plastic tape with 3mm diameter hole. The specimens were placed into a Carbopol and lactic acid demineralization solution (pH4.8, HAP 1mg/L) for 5 hours at 37^o C. The hardness of the specimens was measured using a microhardness tester equipped with diamond Vickers indenter at 300-gf load for 10s. Demineralized enamels were covered with the corresponding GIC materials. The enamels surfaces were remineralized for 1 week in artificial saliva (pH=7) at 37^oC. Covered GICs on enamels were then removed, and hardness of specimens were measured again.Mean surface microhardness for each treatment group was calculated and compared using one-way ANOVA and Tukey’s method.

Results: The microhardness values of EP was significantly higher than those of RP and XT(p<0.01) after one week of remineralization.

Vickers Hardness Number
	Fuji VII EP	Riva Protect	Vanish XT
Baseline	171.1(10.4)^a	170.8(20.6)^a	170.9(12.4)^a
Remineralization 1week	210.2(10.8)^b	185.1(17.2)^a	176.8(12.7)^a

n=9, ():S.D.

Conclusions: Fuji VII EP may have more remineralization effect to the demineralized enamel lesions than Riva protect and Vanish XT.

Division: Australian/New Zealand Division Meeting
Meeting: 2012 Australian/New Zealand Division Meeting (Denarau Island, Fiji)
Location: Denarau Island, Fiji
Year: 2012
Final Presentation ID:
Abstract Category|Abstract Category(s): Scientific Groups

Authors

Hirose, Satomi ( GC Corporation, Tokyo, N/A, Japan )

Fusejima, Futoshi ( GC Corporation, Tokyo, N/A, Japan )

Sakuma, Tetsuro ( GC Corporation, Tokyo, N/A, Japan )

SESSION INFORMATION

Dental Materials