Die spacer thickness reproduction for central incisor crown fabrication with combined computer-aided design and 3D printing technology: an in vitro study

The Journal of Prosthetic Dentistry
Lisa N HoangKwang Woo Ahn

Abstract

The inability to control die spacer thickness has been reported. However, little information is available on the congruency between the computer-aided design parameters for die spacer thickness and the actual printout. The purpose of this study was to evaluate the accuracy and precision of the die spacer thickness achieved by combining computer-aided design and 3-dimensional printing technology. An ivorine maxillary central incisor was prepared for a ceramic crown. The prepared tooth was duplicated by using polyvinyl siloxane duplicating silicone, and 80 die-stone models were produced from Type IV dental stone. The dies were randomly divided into 5 groups with assigned die spacer thicknesses of 25 μm, 45 μm, 65 μm, 85 μm, and 105 μm (n=16). The printed resin copings, obtained from a printer (ProJet DP 3000; 3D Systems), were cemented onto their respective die-stone models with self-adhesive resin cement and stored at room temperature until sectioning into halves in a buccolingual direction. The internal gap was measured at 5 defined locations per side of the sectioned die. Images of the printed resin coping/die-stone model internal gap dimensions were obtained with an inverted bright field metallurgical microscope at ×100 magni...Continue Reading

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Citations

Jan 25, 2016·The Journal of Prosthetic Dentistry·Nawal AlharbiDaniel Wismeijer
Oct 24, 2015·Dental Materials : Official Publication of the Academy of Dental Materials·Jeffrey W Stansbury, Mike J Idacavage
Aug 21, 2019·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Amirali ZandinejadDean Morton Bds
Nov 9, 2019·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Chin-Chun PengVan Ramos
Sep 17, 2020·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Camila S SampaioPablo J Atria
Apr 14, 2020·Technology and Health Care : Official Journal of the European Society for Engineering and Medicine·Saurabh ChaturvediMohammed A Alfarsi
Aug 3, 2021·International Journal of Dentistry·Sherine Mohamed FaragRania Reda Afifi

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