The effect of liquid resin on initial shear bond strength of orthodontic adhesives

Authors

Puntip Dongpaiboon
Paiboon Techalertpaisarn

Publication Date

2015-01-01

Abstract

Objective To study the effect of liquid resin on initial shear bond strength between bracket and enamel in 3 groups using different adhesives Materials and methods Sixty human premolars were divided into 3 groups of 20 each. Tooth surface was treated with phosphoric acid, then rinsed and blown to dry. Brackets were bonded to tooth surface with light cured adhesives as following: group 1 Transbond XTTM (3M Unitek, CA, USA), group 2 (G) GrenglooTM (Ormco, Glendora, CA, USA), and group 3 (P) PadlockTM (Reliance Orthodontic Product, Inc., Itasca, IL, USA). Each group was divided into 2 subgroups of control and test. In test subgroups (T1, G1, P1), brackets were bonded to tooth surface without the use of liquid resin, whereas those in the control subgroups (T2, G2, P2) were bonded with the use of liquid resin in accordance with manufacturerûs instruction. Shear bond strengths of 9 specimens from each subgroup were tested after light activation for 5 minutes by universal testing machine. One remaining specimen from each subgroup was used for investigation of resin penetration pattern into enamel under scanning electron microscope. The means of bond strength between test and control subgroups were compared using unpaired t-test, while the means of bond strength among subgroup were compared by one-way ANOVA. The adhesive remnant indices in each subgroup were measured and tested by the Chi-square at 95% confidence interval. Results Mean shear bond strengths and standard deviations of test subgroups T1, G1, and P1 were 10.18 ± 2.33, 10.72 ± 3.21 and 11.61 ± 3.67 MPa, respectively. Those of control subgroups were 12.12 ± 3.29, 11.94 ± 3.20 and 10.44 ± 3.47 MPa, respectively. There is no significant difference between test and control subgroups of each adhesive. There is no significant difference among all subgroups in test and control groups. Also, no significant difference between ARI scores among subgroups is noted. For the pattern of resin penetration into enamel during bracket bonding procedure, it was found that subgroups without liquid resin represented less penetration of resin than those with liquid resin. Conclusion The use of liquid resin in bracket bonding procedure does not affect initial shear bond strength of all adhesives tested in this study.

DOI

10.58837/CHULA.CUDJ.38.1.2

First Page

11

Last Page

20

Recommended Citation

Dongpaiboon, Puntip and Techalertpaisarn, Paiboon (2015) "The effect of liquid resin on initial shear bond strength of orthodontic adhesives," Chulalongkorn University Dental Journal: Vol. 38: Iss. 1, Article 2.
DOI: 10.58837/CHULA.CUDJ.38.1.2
Available at: https://digital.car.chula.ac.th/cudj/vol38/iss1/2