不同表面处理对LAVA树脂纳米瓷剪切强度的影响

doi:10.13591/j.cnki.kqyx.2022.12.002

Abstract

Abstract: Objective To study the influence of different treatment methods on the shear strength of resin nano-ceramics (LAVA Ultimate) after bonding. Methods The LAVA Ultimate was cut into 80 samples with a size of about 6 mm×6 mm and a height of 2 mm. According to different sandblasting time and pressure, the samples were randomly divided into 4 groups with 10 specimens in each group. The fracture load was tested on the Universal testing machine after the 3M Single Bond Universal+3M RelyX Ultimate was bonded to the nano resin column, and the shear strength was calculated to select the highest group. Under the same blasting conditions, 40 samples were randomly divided into A (3M Single Bond Universal+3M+RelyX Ultimate), B (Porcelain Primer (Bisco)+All-bond Universal (Bisco) Relyx Ultimate (3M)) and nano resin columns for bonding. After bonding, they were divided into two subgroups, which were subjected to 5 000 cooling and heating cycles and a constant temperature water bath for 24 h, respectively. The breaking load was tested on a universal testing machine. The shear strength was calculated, and the data were statistically analyzed using one-way ANOVA. Results Results of one-way ANOVA showed that there were significant differences in shear strength between different sandblasting conditions (group 2 and group 4) (P=0.037). After hot and cold cycling, the shear strength of group A and group B decreased significantly (P=0.003, P<0.01). There was no significant difference in shear strength between groups A and B with different bonding modes (P=0.062). Conclusion The shear strength of resin nano porcelain and resin cement can be significantly improved by sandblasting at 0.2 MPa for 14s, and can be significantly reduced by cooling and heating cycles. The bonding mode has no obvious effect on the shear strength.

Key words: resin nano-ceramic, shear bonding strength, surface treatment

CLC Number:

R783.1

SUN Weigui, LIU Fang, ZHANG Feimin. Influence of different surface treatments on the bonding strength of LAVA resin nano-ceramics[J]. Stomatology, 2022, 42(12): 1063-1066.

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Influence of different surface treatments on the bonding strength of LAVA resin nano-ceramics

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