Effect of the application time of self-etching primers on the bonding of enamel

Cheol-Hee Jin; Young-Gon Cho; Soo-Mee Kim; Myeong-Seon Lee

doi:10.5395/JKACD.2008.33.3.224

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Original Article Effect of the application time of self-etching primers on the bonding of enamel: Cheol-Hee Jin¹, Young-Gon Cho¹, Soo-Mee Kim², Myeong-Seon Lee³; Journal of Korean Academy of Conservative Dentistry 2008;33(3):224-234.
DOI: https://doi.org/10.5395/JKACD.2008.33.3.224
Published online: May 31, 2008

¹Department of Conservative Dentistry, College of Dentistry, Chosun University, Korea.

²Department of Dentistry, College of Medicine, Seonam University, Korea.

³Department of Dental Hygine, Seokang College, Korea.

Corresponding Author: Young-Gon Cho. Department of Conservative Dentistry, College of Dentistry, Chosun University, 421 Seosuk-dong, Dong-gu, Gwangju 501-825, Korea. Tel: 82-62-220-3840, Fax: 82-62-232-9064, ygcho@chosun.ac.kr

• Received: March 4, 2008 • Revised: April 7, 2008 • Accepted: April 28, 2008

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Abstract
REFERENCES

Abstract

The purpose of this study was to compare the normal and two times of application time of six self-etching primers applied to enamel using microshear bond strength (uSBS) test and the finding of scanning electronic microscope (SEM).

Crown of sixty human molars were bisected mesiodistally and buccal and lingual enamel of crowns were partially exposed and polished with 600 grit SiC papers. They were divided into one of two equal groups subdivided into one of six equal groups (n = 10) by self-etching primer adhesives.

After the same manufacture's adhesive resin and composites were bonded on the enamel surface of each group, the bonded specimens were subjected to uSBS testing and also observed under SEM.

In conclusion, generally two times of primer application time increased the enamel uSBS, especially with the statistical increase of bond strength in adhesives involving high-pH primers.
Keywords: Application time; Self-etching primers; Microshear bond strength; SEM; Enamel

REFERENCES

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Figure 1

Microshear bond test of specimen.

Figure 2

SEM micrographs of interface of enamel (E) and composite resin (R) treated with Tyrian SPE for normal application time (20 s) and two times of application time (40 s).

Close adaptation was seen between enamel and resin in both groups, TY group (A) and TY-2 group (B)(× 4,500).

Figure 3

SEM micrographs of interface of enamel (E) and composite resin (R) treated with Contax for normal application time (20 s) and two times of application time (40 s).

Close adaptation was seen between enamel and resin in both groups, CO group (A) and CO-2 group (B)(× 4,500).

Table 1

Classification by kinds of self-etching primer adhesive systems and composites

Table 2

Composition and pH of self-etching primer adhesives

DMA = Dimethacrylate, GPDM = Glycerol phophate dimethacrylate; 10-MDP = 10-Methacryloyloxydecyl dihydrogen phosphate; HEMA = Hydroxyethylmethacrylate; 4-MET4-Methacryloxyethyl trimellitic acid; BPDM; bisphenyl dimethacrylate; Bis-GMA = Bisphenol-glycidyl methacrylate; GDM = Glycerol dimethacrylate; UDMA=Urethane dimethacrylate; TEGDMA = Triethylene glycol dimethacrylate

Table 3

Application time of primer in each group

-2 mean two times of application time than normal primer application time

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Effect of the application time of self-etching primers on the bonding of enamel

J Korean Acad Conserv Dent. 2008;33(3):224-234. Published online May 31, 2008

DOI: https://doi.org/10.5395/JKACD.2008.33.3.224

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Figure

Effect of the application time of self-etching primers on the bonding of enamel

Figure 1 Microshear bond test of specimen.

Figure 2 SEM micrographs of interface of enamel (E) and composite resin (R) treated with Tyrian SPE for normal application time (20 s) and two times of application time (40 s). Close adaptation was seen between enamel and resin in both groups, TY group (A) and TY-2 group (B)(× 4,500).

Figure 3 SEM micrographs of interface of enamel (E) and composite resin (R) treated with Contax for normal application time (20 s) and two times of application time (40 s). Close adaptation was seen between enamel and resin in both groups, CO group (A) and CO-2 group (B)(× 4,500).

Figure 1

Figure 2

Figure 3

Effect of the application time of self-etching primers on the bonding of enamel

Table 1

Classification by kinds of self-etching primer adhesive systems and composites

Table 2

Composition and pH of self-etching primer adhesives

Table 3

Application time of primer in each group

-2 mean two times of application time than normal primer application time

Table 1 Classification by kinds of self-etching primer adhesive systems and composites

Table 2 Composition and pH of self-etching primer adhesives

Table 3 Application time of primer in each group

-2 mean two times of application time than normal primer application time