ArticleClinical oral investigations2026
Effects of post-curing level and phosphorylcholine modification on a 3D-printable resin for definitive crowns.
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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6 authors.
Funding
Abstract
objectivesThis in vitro study evaluated the effects of 2 wt% 2-methacryloyloxyethyl phosphorylcholine (MPC) and post-curing level on degree of conversion, water sorption, and Bis-EMA release from a 3D-printable resin for definitive crowns. MATERIALS AND
methodsVarseoSmile Crown plus and its 2 wt% MPC-modified formulation were fabricated by digital light processing and post-cured with 2 × 2000, 4 × 2000, or 8 × 2000 flashes. Degree of conversion and water sorption were evaluated in 10 specimens per group, and Bis-EMA release in 5. Degree of conversion was measured before and after 10,000 thermocycles by FTIR-ATR, water sorption after thermocycling, and Bis-EMA release at 24 h and 14 days by HPLC-UV. Statistical significance was set at α = 0.05.
resultsHigher post-curing levels increased degree of conversion and reduced Bis-EMA release (P < 0.05), but did not affect water sorption (P = 0.294). MPC reduced degree of conversion and increased water sorption (P < 0.05), but did not affect 24-hour or cumulative 14-day Bis-EMA release (P = 0.130 and P = 0.083, respectively). Bis-EMA release from Lava Ultimate remained below the detection limit.
conclusionsIncreasing post-curing improved polymerization and reduced Bis-EMA release. MPC reduced degree of conversion and increased water sorption without significantly affecting Bis-EMA release. After thermocycling, degree of conversion increased only at the lowest post-curing level. CLINICAL RELEVANCE: Appropriate post-curing may limit Bis-EMA release from definitive 3D-printed crowns. Although MPC modification was associated with lower degree of conversion and greater water sorption, the magnitude of the observed difference in degree of conversion may be of limited clinical relevance.
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