Effect of powder/liquid ratio variation of resin-modified glass ionomer cement on bonding brackets

doi:10.3877/cma.j.issn.1674-1366.2015.04.008

Chinese Journal of Stomatological Research(Electronic Edition) ›› 2015, Vol. 09 ›› Issue (04): 301-304. doi: 10.3877/cma.j.issn.1674-1366.2015.04.008

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• Basic Science Research • Previous Articles Next Articles

Effect of powder/liquid ratio variation of resin-modified glass ionomer cement on bonding brackets

Ziru Huang¹, Hua Zou¹, Muming Hou¹, Huan Xu¹, Jianxin Ji¹^,^†(), Yi Chen²

^1. Department of Stomatology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China
^2. Department of Orthopaedic, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China; Guangdong Key Laboratory of Orthopaedic Technology and Implant Materials, Guangzhou 510120, China

Received:2015-05-04 Online:2015-08-01 Published:2015-08-01
Contact: Jianxin Ji
About author:
Corresponding author: Ji Jianxin, Email: jianxin-ji@126.com

Abstract

Abstract:

Objective

To investigate the influence of powder/liquid ratio variation on brackets bonding of resin-modified glass ionomer cement(RMGIC).

Methods

A total of 140 mandibular premolars were randomly divided into seven groups: control group, group A(+30%), group B(+23%), group C(+17%), group D(-17%), group E(-23%), group F(-30%), according to the powder/liquid ratio, with 20 teeth in each group. Edgewise brackets were bonded with RMGIC on the teeth with different powder/liquid ratio. Shear bond strength were detected on teeth after thermocycling experiment, and the adhesive remnant index were recorded with statistical analysis.

Results

There was no statistical difference in shear bond strength(SBS)between group A-E and control group(P > 0.05). The SBS of group F(5.713 ± 1.55)MPa was significantly lower than that in other groups as well as the content of residual adhesives(P=0.017).

Conclusions

RMGIC has a wide range of clinical application, increasing powder/liquid ratio has no influence of bonding strength of RMGIC. On the contrary, decreasing 30% powder will lower the bonding strength.

Key words: Resin-modified glass ionomer cement, Powder/liquid ratio, Shear bond strength, Adhesive remnant index

Ziru Huang, Hua Zou, Muming Hou, Huan Xu, Jianxin Ji, Yi Chen. Effect of powder/liquid ratio variation of resin-modified glass ionomer cement on bonding brackets[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2015, 09(04): 301-304.

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Figures/Tables 4

References 13

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组别	粉液比(g·g^-1)	粉剂比例变化范围
对照组	3.00∶1	0
A组	3.90∶1	+30%
B组	3.69∶1	+23%
C组	3.51∶1	+17%
D组	2.49∶1	-17%
E组	2.31∶1	-23%
F组	2.10∶1	-30%

组别	粉液比(g·g^-1)	粉剂比例变化范围
对照组	3.00∶1	0
A组	3.90∶1	+30%
B组	3.69∶1	+23%
C组	3.51∶1	+17%
D组	2.49∶1	-17%
E组	2.31∶1	-23%
F组	2.10∶1	-30%

组别	牙数(颗)	抗剪切强度(MPa，±s)	强度范围
对照组	20	7.55 ± 1.20	5.04 ~ 9.27
A组	20	8.67 ± 2.89	5.02 ~ 12.63
B组	20	7.47 ± 2.74	5.53 ~ 14.64
C组	20	8.22 ± 1.36	5.56 ~ 10.45
D组	20	6.49 ± 1.01	4.69 ~ 7.75
E组	20	6.97 ± 1.02	5.03 ~ 8.12
F组	20	5.71 ± 1.55	3.09 ~ 7.56

组别	牙数(颗)	抗剪切强度(MPa，±s)	强度范围
对照组	20	7.55 ± 1.20	5.04 ~ 9.27
A组	20	8.67 ± 2.89	5.02 ~ 12.63
B组	20	7.47 ± 2.74	5.53 ~ 14.64
C组	20	8.22 ± 1.36	5.56 ~ 10.45
D组	20	6.49 ± 1.01	4.69 ~ 7.75
E组	20	6.97 ± 1.02	5.03 ~ 8.12
F组	20	5.71 ± 1.55	3.09 ~ 7.56

组别	对照组	A组	B组	C组	D组	E组
A组	0.984	-	-	-	-	-
B组	0.763	0.927	-	-	-	-
C组	0.824	0.848	0.483	-	-	-
D组	0.837	0.021^a	0.732	0.927	-	-
E组	0.637	0.031^a	0.832	0.463	0.382	-
F组	0.017^a	0.028^a	0.018^a	0.015^a	0.009^a	0.011^a

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