Investigating dental polymer structures of as a function of light-curing protocols using SANS
Dimethacrylate resins are extensively used for dental filling materials but clinical performance is not ideal. The polymers are formed in-situ by photo-initiated free radical polymerisation to which the resultant physicochemical material properties are highly sensitive. Currently there is a drive towards rapid light curing protocols achieved through maximising light irradiance and modifications to photo-initiator chemistry. Rapid curing is however reported to impact on the tensile strength, toughness and hardness of these materials and whilst the effects on degree of monomer to polymer conversion have been extensively studied the impact of curing rate on its resultant polymer structure is unknown. The objective is to determine the cross-linked polymer structure of specific dental resins formulations as a function of the light-curing protocol (irradiance /photo-initator chemistry) employed. The internodal cross-linking distances will be measured using SANS providing insight into relative order correlated with the rate of polymerisation.
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MARTIN Richard A.; ADDISON Owen; CRISTIGLIO Viviana; SIROVICA Slobodan and SKODA Maximilian. (2015). Investigating dental polymer structures of as a function of light-curing protocols using SANS. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-1714
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