Characterisation of Microparticle Waste from Dental Resin-Based Composites

Clinical applications of resin-based composite (RBC) generate environmental pollution in the form microparticulate waste. Methods: SEM, particle size and specific surface area analysis, FT-IR potentiometric titrations were used to characterise microparticles arising from grinding commercial control RBCs as a function time, at time generation after 12 months ageing water. The tested two states: (i) direct-placement materials polymerised simulate routine clinical use (ii) pre-polymerised CAD/CAM ingots milled using technology. Results: maximum RBC was seen 360 s agitation 1290 m2/kg compared with 1017 for material. median diameter 6.39 ?m 9.55 FTIR analysis confirmed that sufficiently unique be identified consistent alteration outermost surfaces particles observed. Protonation-deprotonation behaviour pH zero proton charge (pHzpc) ? 5–6 indicated are negatively charged neutral pH7. Conclusion: large allows elution constituent monomers potential impacts. Characterisation this waste is key understanding mitigation strategies.