Abstract Objectives Computer-aided design (CAD)/computer-aided manufacturing (CAM) dentures are assumed to have more favourable material properties than conventionally fabricated dentures,amongthemalowermethacrylatemonomerrelease. The aim of this study was to test this hypothesis. Materials and methods CAD/CAM dentures were generated from ten different master casts by using four different CAD/ CAM systems. Conventional, heat-polymerised dentures served as control group. Denture weight and volume were measured; the density was calculated, and the denture surface area was assessed digitally. The monomer release after 7 days of water storage was measured by high-performance liquid chromatography. Results Whole You Nexteeth and Wieland Digital Dentures hadsignificantlylowermeanvolumeandweightthanconventional dentures. Baltic Denture System and Whole You Nexteeth had a significantly increased density. Baltic Denture System had a significantly smaller surface area. None of the CAD/CAM dentures released significantly less monomer than the control group.
Conclusions Alltesteddenturesreleasedverylowamountsof methacrylatemonomer,butnotsignificantlylessthanconventional dentures. A statistically significant difference might neverthelessexistincomparisontoother,lessrecommendable denture base materials, such as the frequently used autopolymerising resins. Clinical relevance CAD/CAM denture fabrication has numerousadvantages.Itenablesthe fabrication ofdentureswith lower resin volume and lower denture weight. Both could increase the patient comfort. Dentures with higher density mightexhibitmorefavourablemechanicalproperties.Thehypothesis that CAD/CAM dentures release less monomer than conventional dentures could, however, not be verified.
Keywords Completedentures .CAD/CAMdentistry . PMMA .Monomerrelease