ArticleClinical oral investigations2026
Polymerizable inhibitor can reduce shrinkage stress of resin composite.
Article in Clinical oral investigations, 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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4 authors.
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Abstract
objectiveThe purpose of this study was to prepare dental resin composites (DRCs) with low shrinkage stress and limited leachable inhibitor content by incorporating a synthesized polymerizable inhibitor PBHT (2,6-di-tert-butyl-4-(methacryloyloxy-ethyl-carbamate-methyl)phenol).
methodThe PBHT was synthesized via the reaction between 2,6-di-tert-butyl-4-hydroxymethylphenol and 2-(methacryloyloxy)ethyl isocyanate. The structure of PBHT was confirmed by FT-IR and
resultsAdding PBHT to the resin matrix significantly reduced the DC of DRCs (p < 0.05). The PBHT lowered VS and SS of DRCs (p < 0.05), in contrast to BHT, which showed no significant effect (p > 0.05). Neither PBHT nor BHT affected flexural properties of DRCs (p > 0.05). The WS of DRCs was significantly increased after adding 3 wt% of either inhibitor (p < 0.05). While both PBHT and BHT significantly raised SL (p < 0.05), the PBHT-containing DRCs showed significantly lower SL than the BHT-containing ones at the same concentration (p < 0.05). Compared with the BHT-containing DRCs, PBHT-containing DRCs had lower leachable inhibitors (p < 0.05). SIGNIFICANCE: The PBHT-containing DRCs achieved low shrinkage stress and limited amount of leachable inhibitors. At the optimal concentration of 1 wt%, PBHT had no significant effect on the physicochemical properties other than SL.
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