Microshear bond strength of resin composite to Ti6A14V titanium alloy after different chemical and mechanical surface treatments
Abstract Background This study aimed to compare the effects of different surface treatments including sandblasting, 9% hydrofluoric (HF) acid, 48% sulfuric acid (SA), and silica gel plus SA on micro-shear bond strength (μSBS) of resin composite to Ti6A14V titanium alloy. Methods In this in vitro stu...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
BMC
2025-08-01
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| Series: | BMC Oral Health |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s12903-025-06614-x |
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| Summary: | Abstract Background This study aimed to compare the effects of different surface treatments including sandblasting, 9% hydrofluoric (HF) acid, 48% sulfuric acid (SA), and silica gel plus SA on micro-shear bond strength (μSBS) of resin composite to Ti6A14V titanium alloy. Methods In this in vitro study, 60 Ti6A14V titanium alloy plates were randomly assigned to five experimental groups (n = 12) as follows: Group (1) untreated, Group (2) sandblasted (50 μm aluminum oxide particle), Group (3) acid etched in 9% HF for 60 s, Group (4) acid etched in 48% H2SO4 at 60 °C for 30 min, and Group (5) acid etched in 50% silica-sulfuric acid (SiO2–H2SO4) at 60 °C for 30 min. Profilometric examination and scanning electron microscopy (SEM) were performed. A universal adhesive resin was applied to the plates and light-cured. One tygon tubes was placed perpendicularly to each plate. The resin composite was then placed on the treated plates and light-cured for 40 s. μ-SBS and failure mode were analyzed after 2000 thermal cycles (5 to 55 °C). Data were analyzed by ANOVA, Tukey, and Chi-square tests at the significance level of 0.05. Results The μSBS was significantly different among the groups (P = 0.032). The mean µSBS of the control group was significantly lower than that of sandblasting (P < 0.001), SA etching (P = 0.009) and silica-SA (P = 0.003) groups. The Ra of sandblasting (P = 0.021) and silica-SA (P = 0.004) groups was significantly higher than the control group. Also, the Ra of HF acid group was significantly lower than that of sandblasting (P = 0.035) and silica-SA (P = 0.007) groups. The Rz of sandblasting group was significantly higher than all other groups (P < 0.001 for all). Conclusion Within the study limitations, surface treatment by sandblasting resulted in the highest surface roughness and μSBS of Ti6A14V alloy-resin composite followed by silica gel-SA, SA etching, and HF. |
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| ISSN: | 1472-6831 |