Effects of ethanol-wet bonding on the pulp chamber dentin-resin bonding interface： an scanning electron microscope observation

doi:10.3877/cma.j.issn.1674-1366.2011.02.006

Abstract

Abstract:

Objective

To compare the microstructures of the pulp chamber dentin-resin interfaces formed by using the ethanol-wet bonding and water-wet bonding techniques， so as to evaluate the effects of the ethanol-wet bonding technique on the pulp chamber dentin-resin bonding interface.

Methods

Twelve extracted human impacted third molars were obtained and cut horizontally to expose the pulp chamber.The roofs of the pulp chamber and pulp tissues were removed， and the canal orifices were sealed.Four of them were selected to observe the surface characteristics of the pulp chamber with the scanning electron microscope （SEM） before and after the treatment with 37% phosphoric acid.The other 8 molars were randomly divided into 4 groups（n=2）.Two bonding techniques （ethanol-wet bonding and water-wet bonding） and two 'one-bottle'total-etch adhesive systems ［ethanol/water-based adhesive Single Bond 2（SB） and acetone-based adhesive One Step （OS）］ were applied in the pulp chamber dentin-resin bonding experiments respectively， as per manufacturers' instructions.The bonding interfaces of the 4 groups were examined with SEM.

Results

Typical hybridization zone was not observed in the pulp chamber dentine-resin interfaces of the 4 groups.The formed resin tags were more uniform and significantly longer by using ethanol-wet bonding technique ［SB group：（72.26 ± 4.59）μm and OS group：（74.75±3.42）μm］ than those by water-wet bonding ［SB group：（37.14±4.36）μm and OS group：（40.40±3.19）μm］（P ＜0.05）.

Conclusions

Ethanol-wet bonding technique led to better resin interdiffusion into the pulp chamber dentin， provided more effective dentine-resin interface and enhanced the adhesion effect between the dentin and the resin.

Key words: Pulp chamber dentin, Ethanol-wet bonding, Scanning electron microscope, Bonding interface

Yu WEI, Yan LI. Effects of ethanol-wet bonding on the pulp chamber dentin-resin bonding interface： an scanning electron microscope observation[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2011, 5(02): 144-150.

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Figures/Tables 10

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黏结剂	黏结方法		t	P
黏结剂	水湿黏结	乙醇湿黏结	t	P
Single Bond 2	37.14±4.36^a1	72.26±4.59^b1	32.87	0.000
One Step	40.40±3.19^a2	74.75±3.42^b1	24.80	0.000
t	2.693	1.944
P	0.010	0.059

黏结剂	黏结方法		t	P
黏结剂	水湿黏结	乙醇湿黏结	t	P
Single Bond 2	37.14±4.36^a1	72.26±4.59^b1	32.87	0.000
One Step	40.40±3.19^a2	74.75±3.42^b1	24.80	0.000
t	2.693	1.944
P	0.010	0.059

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