Zhe-Chen Zhang1, Pei-Lun Li1, Feng-Ting Chu1, Gang Shen2. 1. Department of Orthodontics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology; National Clinical Research Center of Stomatology, Room 707, No.500 Qu Xi Road, Shanghai, China. 2. Department of Orthodontics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology; National Clinical Research Center of Stomatology, Room 707, No.500 Qu Xi Road, Shanghai, China. drgangshen@163.com.
Abstract
OBJECTIVE: The accuracies of three-dimensional (3D) printed dental models using various digital light processing (DLP) and stereolithography (SLA) printers at different thicknesses were compared. MATERIALS AND METHODS: Based on digital dental models (originally digitized using R700; 3Shape, Copenhagen, Denmark), physical dental models were printed using three types of DLP printers: (1) EvoDent (UnionTec, Shanghai, China) with layer thicknesses of 50 μm and 100 μm; (2) EncaDent (Encashape, WuXi, China) with layer thicknesses of 20, 30, 50 and 100 μm; (3) Vida HD (Envisioned, Dearborn, MI, USA) with layer thicknesses of 50 and 100 μm. Models with the SLA printer Form 2 (Formlabs, Somerville, MA, USA) were printed with layer thicknesses of 25, 50 and 100 μm. All 22 printed models were converted to digital dental models using a D2000 model scanner (3 Shape, Copenhagen, Denmark) and compared three-dimensionally to the source files using Geomagic Qualify 12.0 (3D Systems, Rock Hill, SC, USA). RESULTS: The printing accuracy of all printers was higher at 50 μm. When the layer thickness was set at 100 μm, the printing speed and printing accuracy of DLP printer were both superior to those of the SLA printer. In all groups, the EvoDent 50 μm group had the highest consistency with the source files (mean absolute deviation of 0.0233 mm in the maxilla and 0.0301 mm in the mandible). While the accuracy of Form 2 100 μm group was the lowest (mean absolute deviation of 0.0511 mm in the maxilla and 0.0570 mm in the mandible). CONCLUSION: For the 3D printers studied, 50 μm was the optimum layer thickness for DLP technology, and the printing accuracy using SLA technology increased with decreasing layer thickness. The DLP technology also had higher printing accuracy at a layer thickness of 100 μm. EvoDent 50 μm had the highest and Form 2 100 μm the lowest printing accuracy.
OBJECTIVE: The accuracies of three-dimensional (3D) printed dental models using various digital light processing (DLP) and stereolithography (SLA) printers at different thicknesses were compared. MATERIALS AND METHODS: Based on digital dental models (originally digitized using R700; 3Shape, Copenhagen, Denmark), physical dental models were printed using three types of DLP printers: (1) EvoDent (UnionTec, Shanghai, China) with layer thicknesses of 50 μm and 100 μm; (2) EncaDent (Encashape, WuXi, China) with layer thicknesses of 20, 30, 50 and 100 μm; (3) Vida HD (Envisioned, Dearborn, MI, USA) with layer thicknesses of 50 and 100 μm. Models with the SLA printer Form 2 (Formlabs, Somerville, MA, USA) were printed with layer thicknesses of 25, 50 and 100 μm. All 22 printed models were converted to digital dental models using a D2000 model scanner (3 Shape, Copenhagen, Denmark) and compared three-dimensionally to the source files using Geomagic Qualify 12.0 (3D Systems, Rock Hill, SC, USA). RESULTS: The printing accuracy of all printers was higher at 50 μm. When the layer thickness was set at 100 μm, the printing speed and printing accuracy of DLP printer were both superior to those of the SLA printer. In all groups, the EvoDent 50 μm group had the highest consistency with the source files (mean absolute deviation of 0.0233 mm in the maxilla and 0.0301 mm in the mandible). While the accuracy of Form 2 100 μm group was the lowest (mean absolute deviation of 0.0511 mm in the maxilla and 0.0570 mm in the mandible). CONCLUSION: For the 3D printers studied, 50 μm was the optimum layer thickness for DLP technology, and the printing accuracy using SLA technology increased with decreasing layer thickness. The DLP technology also had higher printing accuracy at a layer thickness of 100 μm. EvoDent 50 μm had the highest and Form 2 100 μm the lowest printing accuracy.
Authors: M Shahbazian; R Jacobs; J Wyatt; G Willems; V Pattijn; E Dhoore; C VAN Lierde; F Vinckier Journal: J Oral Rehabil Date: 2010-11 Impact factor: 3.837
Authors: Thorsten Grünheid; Nishant Patel; Nanci L De Felippe; Andrew Wey; Philippe R Gaillard; Brent E Larson Journal: Am J Orthod Dentofacial Orthop Date: 2014-02 Impact factor: 2.650
Authors: Magdalena Kasparova; Lucie Grafova; Petr Dvorak; Tatjana Dostalova; Ales Prochazka; Hana Eliasova; Josef Prusa; Soroush Kakawand Journal: Biomed Eng Online Date: 2013-05-31 Impact factor: 2.819
Authors: Christian Graetz; Kristina Schoepke; Johanna Rabe; Susanne Schorr; Antje Geiken; David Christofzik; Thomas Rinder; Christof E Dörfer; Sonja Sälzer Journal: BMC Oral Health Date: 2021-04-14 Impact factor: 2.757