Ultimate tensile strength of total and self-etch adhesives: Effect of light irradiation distance.

  • Maan M. Nayif Department of Conser-vative Dentistry, College of Dentistry, Mosul University, Mosul, Iraq.


Objective: To evaluate the ultimate tensile strength (UTS) of total and self- etch adhesives irradiated at different distances. Materials and Methods: Sixty cylindrical specimens of 0.78mm diameter and 10 mm length were prepared of two types of adhesive systems total etch Excite DSC (EX – Ivoclar Vivadent, Schaan, Liechtenstein) and one-step self-etch Clearfil S3 Bond (S3, Kuraray Medical Inc., Tokyo, Japan). Specimens of each adhesive were divided into three groups according to the light irradiation distance (0, 2, 4mm) (n=10). Each specimen was attached to universal testing machine (Digital Force Gauge, IMADA CO., LTD, Japan) and loaded at cross head speed of 1mm/min until failure. Data were analyzed using two-way ANOVA and Independent Student t-test at p< 0.05. Results: Mean UTS for total etch (24.63, 18.19, 17.26 Mpa) and for self-etch (12.68, 8.53, 7.58Mpa) at (0, 2, 4mm) distances. Specimens irradiated directly show significantly the highest UTS while those irradiated at 4mm show the lowest values (p<0.05). Excite DSC total etch adhesive have higher UTS than Clearfil S3 self-etch adhesive regardless of irradiation distance (p<0.05).Conclusions: The UTS of the evaluated adhesives was light irradiation distance and adhesive system dependant.


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How to Cite
NAYIF, Maan M.. Ultimate tensile strength of total and self-etch adhesives: Effect of light irradiation distance.. Journal of Oral Research, [S.l.], p. 44-47, aug. 2019. ISSN 0719-2479. Available at: <http://joralres.com/index.php/JOR/article/view/838>. Date accessed: 17 aug. 2019.