ArticleBiomaterial investigations in dentistry2026
Effect of salivary pH variations on the adhesive performance of Transbond XT and Orthocem in orthodontic bracket bonding.
Article in Biomaterial investigations in dentistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: This in vitro study aimed to evaluate the shear bond strength of orthodontic brackets bonded to acrylic resin specimens with two adhesive systems, Transbond XT and Orthocem, under different salivary pH levels (4, 5, 6, and 7). Materials and methods: A total of 120 acrylic resin specimens (Brava Block Results: Transbond XT consistently showed higher bond strength than Orthocem across all pH levels. Maximum resistance was observed at pH 7 (21.19 ± 5.06 MPa), followed by the control group (19.64 ± 5.28 MPa). Orthocem demonstrated significantly lower values, ranging from 9.51 ± 3.87 MPa (pH 5) to 4.94 ± 2.15 MPa (pH 6). Acidic conditions reduced the bond strength of both adhesives, but Transbond XT maintained clinically reliable values, while Orthocem was more susceptible to performance decline at moderately acidic levels. Conclusions: Salivary pH directly influenced adhesive performance. Transbond XT demonstrated superior resistance under all conditions, whereas Orthocem showed lower but still clinically acceptable shear bond strength values, except at pH 6, where a marked decrease was observed.
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