Effect of Different Surface Treatments on Bond Strength of Bio-HPP to PMMA

doi:10.13701/j.cnki.kqyxyj.2020.03.009

Abstract

Abstract: Objective: To investigate the influence of different surface treatments on the bond strength between Bio-HPP and PMMA. Methods: 68 Bio-HPP specimens were prepared and divided into 4 groups randomly:CG, SA_0.05, SA_0.35,and LA. After surface pretreatments, the surface morphology was observed by SEM and the surface roughness was measured by surface roughness tester. And then they were bonded to PMMA, half of specimens in each group were stored in distilled water for 24 h and the others were received 5 000 times of thermalcycling. Next, shear bond strength was tested by universal test machine. Results: SEM results showed that LA and SA were rougher than CG. Surface roughness was: CG＜LA＜SA_0.05＜SA_0.35. Shear strength was: CG＜LA＜SA_0.05＜SA_0.35. After thermalcycling, the shear bond strength decreased significantly except SA_0.35 group (P＜0.05). Conclusion: Sandblast and Nd:YAG laser can change the surface topography and improve the shear bond strength of Bio-HPP. The proper increase of the sandblast pressure might benefit to the stability of Bio-HPP to PMMA.

Key words: Bio-HPP, sandblast, Nd:YAG laser, surface roughness, shear strength

SHI Qiaorui, XU Xin, YU Hao, ZHENG Ming. Effect of Different Surface Treatments on Bond Strength of Bio-HPP to PMMA[J]. Journal of Oral Science Research, 2020, 36(3): 226-229.

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