Journal of Prosthetic Dentistry

Impact of postpolymerization devices and locations on the color, translucency, and mechanical properties of 3D-printed interim resin materials

  • Juhea Chang
    Clinical Professor, National Dental Care Center for Persons with Special Needs, Seoul National University Dental Hospital, Seoul, Republic of Korea
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  • Yukyung Choi
    Graduate Student, Department of Dental Biomaterials Science, School of Dentistry, Seoul National University, Seoul, Republic of Korea
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  • Wonjoon Moon
    Researcher, Department of Dental Biomaterials Science, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea; Research Fellow, Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Mass and Research Fellow, Harvard Medical School, Boston, Mass
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  • Shin Hye Chung
    Corresponding author: Dr Shin Hye Chung, Department of Dental Biomaterials Science, Dental Research Institute, School of Dentistry, Seoul National University, 101, Daehak-ro, Jongno-gu, Seoul 03080, REPUBLIC OF KOREA
    Associate Professor, Department of Dental Biomaterials Science, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
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Published:September 27, 2022DOI:


      Statement of problem

      How postpolymerization conditions affect the color and mechanical properties of 3-dimensional (3D)-printed prostheses is unclear.


      The purpose of this in vitro study was to evaluate the color, microhardness, and flexural strength of 3D-printed interim resin materials and to assess the effect of postpolymerization devices, polymerizing locations, and thermocycling on those properties.

      Material and methods

      A total of 270 disk-shaped specimens and 180 bar-shaped specimens were designed and 3D-printed with interim resin material (NextDent C&B). The specimens were postpolymerized in 1 of 3 devices (Group ND; NextDent, Group CR; Carima, and Group FL; Formlabs). Each group was divided into 3 circular zones of the polymerizing plate (central, medial, and lateral). Half of the specimens were subjected to 10 000 thermocycles. Color measurement, Vickers microhardness test, and 3-point flexural strength test were performed. Data were statistically analyzed by using the Kruskal-Wallis and Mann-Whitney tests (α=.05).


      The L∗a∗b∗ color coordinates exhibited significant differences among the 3 zones (P<.05). The color and translucency differences according to CIELab and CIEDE among the zones exceeded the clinically perceptible levels in group CR. ΔE and ΔTP between with and without thermocycling were significantly different among the devices (P<.05). Microhardness and flexural strength were significantly different among the zones for those affected by thermocycling (P<.05).


      Different locations in postpolymerization devices influenced the color, translucency, and mechanical properties of 3D-printed interim resin materials. Thermocycling induced color and translucency changes and the mechanical weakening of postpolymerized resins, and the impact differed according to the device type.
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        • Della Bona A.
        • Cantelli V.
        • Britto V.T.
        • Collares K.F.
        • Stansbury J.W.
        3D printing restorative materials using a stereolithographic technique: a systematic review.
        Dent Mater. 2021; 37: 336-350
        • Piedra-Cascón W.
        • Krishnamurthy V.R.
        • Att W.
        • Revilla-León M.
        3D printing parameters, supporting structures, slicing, and post-processing procedures of vat-polymerization additive manufacturing technologies: A narrative review.
        J Dent. 2021; 109: 103630
        • Stansbury J.W.
        • Idacavage M.J.
        3D printing with polymers: Challenges among expanding options and opportunities.
        Dent Mater. 2016; 32: 54-64
        • Revilla-León M.
        • Özcan M.
        Additive Manufacturing Technologies Used for Processing Polymers: Current Status and Potential Application in Prosthetic Dentistry.
        J Prosthodont. 2019; 28: 146-158
        • Tahayeri A.
        • Morgan M.
        • Fugolin A.P.
        • Bompolaki D.
        • Athirasala A.
        • Pfeifer C.S.
        • et al.
        3D printed versus conventionally cured provisional crown and bridge dental materials.
        Dent Mater. 2018; 34: 192-200
        • Unkovskiy A.
        • Bui P.H.
        • Schille C.
        • Geis-Gerstorfer J.
        • Huettig F.
        • Spintzyk S.
        Objects build orientation, positioning, and curing influence dimensional accuracy and flexural properties of stereolithographically printed resin.
        Dent Mater. 2018; 34: e324-e333
        • Kessler A.
        • Hickel R.
        • Reymus M.
        3D Printing in Dentistry-State of the Art.
        Oper Dent. 2020; 45: 30-40
        • Revilla-León M.
        • Meyers M.J.
        • Zandinejad A.
        • Özcan M.
        A review on chemical composition, mechanical properties, and manufacturing work flow of additively manufactured current polymers for interim dental restorations.
        J Esthet Restor Dent. 2019; 31: 51-57
        • Mayer J.
        • Stawarczyk B.
        • Vogt K.
        • Hickel R.
        • Edelhoff D.
        • Reymus M.
        Influence of cleaning methods after 3D printing on two-body wear and fracture load of resin-based temporary crown and bridge material.
        Clin Oral Investig. 2021; 25: 5987-5996
        • Moon W.
        • Kim S.
        • Lim B.S.
        • Park Y.S.
        • Kim R.J.
        • Chung S.H.
        Dimensional Accuracy Evaluation of Temporary Dental Restorations with Different 3D Printing Systems.
        Materials (Basel). 2021; 14: 1487
        • Wu D.
        • Zhao Z.
        • Zhang Q.
        • Qi H.J.
        • Fang D.
        Mechanics of shape distortion of DLP 3D printed structures during UV post-curing.
        Soft Matter. 2019; 15: 6151-6159
        • Rubayo D.D.
        • Phasuk K.
        • Vickery J.M.
        • Morton D.
        • Lin W.-S.
        Influences of build angle on the accuracy, printing time, and material consumption of additively manufactured surgical templates.
        J Prosthet Dent. 2021; 126: 658-663
        • Lin C.H.
        • Lin Y.M.
        • Lai Y.L.
        • Lee S.Y.
        Mechanical properties, accuracy, and cytotoxicity of UV-polymerized 3D printing resins composed of Bis-EMA, UDMA, and TEGDMA.
        J Prosthet Dent. 2020; 123: 349-354
        • Hadis M.A.
        • Shortall A.C.
        • Palin W.M.
        Competitive light absorbers in photoactive dental resin-based materials.
        Dent Mater. 2012; 28: 831-841
        • Reymus M.
        • Fabritius R.
        • Keßler A.
        • Hickel R.
        • Edelhoff D.
        • Stawarczyk B.
        Fracture load of 3D-printed fixed dental prostheses compared with milled and conventionally fabricated ones: the impact of resin material, build direction, post-curing, and artificial aging-an in vitro study.
        Clin Oral Investig. 2020; 24: 701-710
        • Chen H.
        • Cheng D.H.
        • Huang S.C.
        • Lin Y.M.
        Comparison of flexural properties and cytotoxicity of interim materials printed from mono-LCD and DLP 3D printers.
        J Prosthet Dent. 2021; 126: 703-708
        • Reymus M.
        • Stawarczyk B.
        Influence of Different Postpolymerization Strategies and Artificial Aging on Hardness of 3D-Printed Resin Materials: An In Vitro Study.
        Int J Prosthodont. 2020; 33: 634-640
        • Reymus M.
        • Stawarczyk B.
        In vitro study on the influence of postpolymerization and aging on the Martens parameters of 3D-printed occlusal devices.
        J Prosthet Dent. 2021; 125: 817-823
        • Kim D.
        • Shim J.S.
        • Lee D.
        • Shin S.H.
        • Nam N.E.
        • Park K.H.
        • et al.
        Effects of Post-Curing Time on the Mechanical and Color Properties of Three-Dimensional Printed Crown and Bridge Materials.
        Polymers (Basel). 2020; 12: 2762
        • Scherer M.D.
        • Barmak B.A.
        • Özcan M.
        • Revilla-León M.
        Influence of postpolymerization methods and artificial aging procedures on the fracture resistance and flexural strength of a vat-polymerized interim dental material.
        J Prosthet Dent. 29 March 2021; ([Epub ahead of print])
        • Bayarsaikhan E.
        • Lim J.H.
        • Shin S.H.
        • Park K.H.
        • Park Y.B.
        • Lee J.H.
        • et al.
        Effects of Postcuring Temperature on the Mechanical Properties and Biocompatibility of Three-Dimensional Printed Dental Resin Material.
        Polymers. 2021; 13: 1180
        • Katheng A.
        • Kanazawa M.
        • Iwaki M.
        • Arakida T.
        • Hada T.
        • Minakuchi S.
        Evaluation of trueness and precision of stereolithography-fabricated photopolymer-resin dentures under different postpolymerization conditions: An in vitro study..
        J Prosthet Dent. 11 February 2021; ([Epub ahead of print])
        • Scotti C.K.
        • Velo M.M.A.C.
        • Rizzante F.A.P.
        • Nascimento T.R.L.
        • Mondelli R.F.L.
        • Bombonatti J.F.S.
        Physical and surface properties of a 3D-printed composite resin for a digital workflow.
        J Prosthet Dent. 2020; 124: 614.e1-614.e5
        • Simoneti D.M.
        • Pereira-Cenci T.
        • dos Santos M.B.F.
        Comparison of material properties and biofilm formation in interim single crowns obtained by 3D printing and conventional methods.
        J Prosthet Dent. 2020; 127: 168-172
        • Thompson G.A.
        • Luo Q.
        Contribution of postpolymerization conditioning and storage environments to the mechanical properties of three interim restorative materials.
        J Prosthet Dent. 2014; 112: 638-648
        • Çakmak G.
        • Yilmaz H.
        • Aydoğ Ö.
        • Yilmaz B.
        Flexural strength of CAD-CAM and conventional interim resin materials with a surface sealant.
        J Prosthet Dent. 2020; 124: 800.e1-800.e7
        • Khashayar G.
        • Bain P.A.
        • Salari S.
        • Dozic A.
        • Kleverlaan C.J.
        • Feilzer A.J.
        Perceptibility and acceptability thresholds for colour differences in dentistry.
        J Dent. 2014; 42: 637-644
        • Perez Mdel M.
        • Ghinea R.
        • Herrera L.J.
        • Ionescu A.M.
        • Pomares H.
        • Pulgar R.
        • et al.
        Dental ceramics: a CIEDE2000 acceptability thresholds for lightness, chroma and hue differences.
        J Dent. 2011; 39: e37-e44
        • Salas M.
        • Lucena C.
        • Herrera L.J.
        • Yebra A.
        • Della Bona A.
        • Pérez M.M.
        Translucency thresholds for dental materials.
        Dent Mater. 2018; 34: 1168-1174
        • Santini A.
        • Miletic V.
        • Swift M.D.
        • Bradley M.
        Degree of conversion and microhardness of TPO-containing resin-based composites cured by polywave and monowave LED units.
        J Dent. 2012; 40: 577-584
        • Leprince J.G.
        • Palin W.M.
        • Hadis M.A.
        • Devaux J.
        • Leloup G.
        Progress in dimethacrylate-based dental composite technology and curing efficiency.
        Dent Mater. 2013; 29: 139-156
        • Albuquerque P.P.
        • Moreira A.D.
        • Moraes R.R.
        • Cavalcante L.M.
        • Schneider L.F.
        Color stability, conversion, water sorption and solubility of dental composites formulated with different photoinitiator systems.
        J Dent. 2013; 41: e67-e72
        • de Oliveira D.C.
        • Rocha M.G.
        • Gatti A.
        • Correr A.B.
        • Ferracane J.L.
        • Sinhoret M.A.
        Effect of different photoinitiators and reducing agents on cure efficiency and color stability of resin-based composites using different LED wavelengths.
        J Dent. 2015; 43: 1565-1572
        • Kowalska A.
        • Sokolowski J.
        • Bociong K.
        The Photoinitiators Used in Resin Based Dental Composite-A Review and Future Perspectives.
        Polymers (Basel). 2021; 13: 470
        • Yousif E.
        • Haddad R.
        Photodegradation and photostabilization of polymers, especially polystyrene: review.
        SpringerPlus. 2013; 2: 398
        • Kim J.E.
        • Choi W.H.
        • Lee D.
        • Shin Y.
        • Park S.H.
        • Roh B.D.
        • et al.
        Color and Translucency Stability of Three-Dimensional Printable Dental Materials for Crown and Bridge Restorations.
        Materials (Basel). 2021 Jan 31; 14: 650