Comparison of prosthetic models produced by traditional and additive manufacturing methods

Jin Young Park, Hae-Young Kim, Ji Hwan Kim, Jae Hong Kim, Woong Chul Kim

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

PURPOSE. The purpose of this study was to verify the clinical-feasibility of additive manufacturing by comparing the accuracy of four different manufacturing methods for metal coping: the conventional lost wax technique (CLWT); subtractive methods with wax blank milling (WBM); and two additive methods, multi jet modeling (MJM), and micro-stereolithography (Micro-SLA). MATERIALS AND METHODS. Thirty study models were created using an acrylic model with the maxillary upper right canine, first premolar, and first molar teeth. Based on the scan files from a non-contact blue light scanner (Identica; Medit Co. Ltd., Seoul, Korea), thirty cores were produced using the WBM, MJM, and Micro-SLA methods, respectively, and another thirty frameworks were produced using the CLWT method. To measure the marginal and internal gap, the silicone replica method was adopted, and the silicone images obtained were evaluated using a digital microscope (KH-7700; Hirox, Tokyo, Japan) at 140X magnification. Analyses were performed using two-way analysis of variance (ANOVA) and Tukey post hoc test (α=.05). RESULTS. The mean marginal gaps and internal gaps showed significant differences according to tooth type (P<.001 and P<.001, respectively) and manufacturing method (P<.037 and P<.001, respectively). Micro-SLA did not show any significant difference from CLWT regarding mean marginal gap compared to the WBM and MJM methods. CONCLUSION. The mean values of gaps resulting from the four different manufacturing methods were within a clinically allowable range, and, thus, the clinical use of additive manufacturing methods is acceptable as an alternative to the traditional lost wax-technique and subtractive manufacturing.

Original languageEnglish
Pages (from-to)294-302
Number of pages9
JournalJournal of Advanced Prosthodontics
Volume7
Issue number4
DOIs
Publication statusPublished - 2015

Fingerprint

Waxes
Silicones
Tooth
Tokyo
Bicuspid
Korea
Canidae
Analysis of Variance
Japan
Metals
Light

Keywords

  • Additive manufacturing
  • Internal gap
  • Marginal gap
  • Micro-SLA
  • Multi Jet Modeling
  • Subtractive manufacturing

ASJC Scopus subject areas

  • Dentistry (miscellaneous)
  • Oral Surgery

Cite this

Comparison of prosthetic models produced by traditional and additive manufacturing methods. / Park, Jin Young; Kim, Hae-Young; Kim, Ji Hwan; Kim, Jae Hong; Kim, Woong Chul.

In: Journal of Advanced Prosthodontics, Vol. 7, No. 4, 2015, p. 294-302.

Research output: Contribution to journalArticle

Park, Jin Young ; Kim, Hae-Young ; Kim, Ji Hwan ; Kim, Jae Hong ; Kim, Woong Chul. / Comparison of prosthetic models produced by traditional and additive manufacturing methods. In: Journal of Advanced Prosthodontics. 2015 ; Vol. 7, No. 4. pp. 294-302.
@article{384abd452db845a2a42c880b87e5252d,
title = "Comparison of prosthetic models produced by traditional and additive manufacturing methods",
abstract = "PURPOSE. The purpose of this study was to verify the clinical-feasibility of additive manufacturing by comparing the accuracy of four different manufacturing methods for metal coping: the conventional lost wax technique (CLWT); subtractive methods with wax blank milling (WBM); and two additive methods, multi jet modeling (MJM), and micro-stereolithography (Micro-SLA). MATERIALS AND METHODS. Thirty study models were created using an acrylic model with the maxillary upper right canine, first premolar, and first molar teeth. Based on the scan files from a non-contact blue light scanner (Identica; Medit Co. Ltd., Seoul, Korea), thirty cores were produced using the WBM, MJM, and Micro-SLA methods, respectively, and another thirty frameworks were produced using the CLWT method. To measure the marginal and internal gap, the silicone replica method was adopted, and the silicone images obtained were evaluated using a digital microscope (KH-7700; Hirox, Tokyo, Japan) at 140X magnification. Analyses were performed using two-way analysis of variance (ANOVA) and Tukey post hoc test (α=.05). RESULTS. The mean marginal gaps and internal gaps showed significant differences according to tooth type (P<.001 and P<.001, respectively) and manufacturing method (P<.037 and P<.001, respectively). Micro-SLA did not show any significant difference from CLWT regarding mean marginal gap compared to the WBM and MJM methods. CONCLUSION. The mean values of gaps resulting from the four different manufacturing methods were within a clinically allowable range, and, thus, the clinical use of additive manufacturing methods is acceptable as an alternative to the traditional lost wax-technique and subtractive manufacturing.",
keywords = "Additive manufacturing, Internal gap, Marginal gap, Micro-SLA, Multi Jet Modeling, Subtractive manufacturing",
author = "Park, {Jin Young} and Hae-Young Kim and Kim, {Ji Hwan} and Kim, {Jae Hong} and Kim, {Woong Chul}",
year = "2015",
doi = "10.4047/jap.2015.7.4.294",
language = "English",
volume = "7",
pages = "294--302",
journal = "Journal of Advanced Prosthodontics",
issn = "2005-7806",
publisher = "The Korean Academy of prosthodontics",
number = "4",

}

TY - JOUR

T1 - Comparison of prosthetic models produced by traditional and additive manufacturing methods

AU - Park, Jin Young

AU - Kim, Hae-Young

AU - Kim, Ji Hwan

AU - Kim, Jae Hong

AU - Kim, Woong Chul

PY - 2015

Y1 - 2015

N2 - PURPOSE. The purpose of this study was to verify the clinical-feasibility of additive manufacturing by comparing the accuracy of four different manufacturing methods for metal coping: the conventional lost wax technique (CLWT); subtractive methods with wax blank milling (WBM); and two additive methods, multi jet modeling (MJM), and micro-stereolithography (Micro-SLA). MATERIALS AND METHODS. Thirty study models were created using an acrylic model with the maxillary upper right canine, first premolar, and first molar teeth. Based on the scan files from a non-contact blue light scanner (Identica; Medit Co. Ltd., Seoul, Korea), thirty cores were produced using the WBM, MJM, and Micro-SLA methods, respectively, and another thirty frameworks were produced using the CLWT method. To measure the marginal and internal gap, the silicone replica method was adopted, and the silicone images obtained were evaluated using a digital microscope (KH-7700; Hirox, Tokyo, Japan) at 140X magnification. Analyses were performed using two-way analysis of variance (ANOVA) and Tukey post hoc test (α=.05). RESULTS. The mean marginal gaps and internal gaps showed significant differences according to tooth type (P<.001 and P<.001, respectively) and manufacturing method (P<.037 and P<.001, respectively). Micro-SLA did not show any significant difference from CLWT regarding mean marginal gap compared to the WBM and MJM methods. CONCLUSION. The mean values of gaps resulting from the four different manufacturing methods were within a clinically allowable range, and, thus, the clinical use of additive manufacturing methods is acceptable as an alternative to the traditional lost wax-technique and subtractive manufacturing.

AB - PURPOSE. The purpose of this study was to verify the clinical-feasibility of additive manufacturing by comparing the accuracy of four different manufacturing methods for metal coping: the conventional lost wax technique (CLWT); subtractive methods with wax blank milling (WBM); and two additive methods, multi jet modeling (MJM), and micro-stereolithography (Micro-SLA). MATERIALS AND METHODS. Thirty study models were created using an acrylic model with the maxillary upper right canine, first premolar, and first molar teeth. Based on the scan files from a non-contact blue light scanner (Identica; Medit Co. Ltd., Seoul, Korea), thirty cores were produced using the WBM, MJM, and Micro-SLA methods, respectively, and another thirty frameworks were produced using the CLWT method. To measure the marginal and internal gap, the silicone replica method was adopted, and the silicone images obtained were evaluated using a digital microscope (KH-7700; Hirox, Tokyo, Japan) at 140X magnification. Analyses were performed using two-way analysis of variance (ANOVA) and Tukey post hoc test (α=.05). RESULTS. The mean marginal gaps and internal gaps showed significant differences according to tooth type (P<.001 and P<.001, respectively) and manufacturing method (P<.037 and P<.001, respectively). Micro-SLA did not show any significant difference from CLWT regarding mean marginal gap compared to the WBM and MJM methods. CONCLUSION. The mean values of gaps resulting from the four different manufacturing methods were within a clinically allowable range, and, thus, the clinical use of additive manufacturing methods is acceptable as an alternative to the traditional lost wax-technique and subtractive manufacturing.

KW - Additive manufacturing

KW - Internal gap

KW - Marginal gap

KW - Micro-SLA

KW - Multi Jet Modeling

KW - Subtractive manufacturing

UR - http://www.scopus.com/inward/record.url?scp=84939810150&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84939810150&partnerID=8YFLogxK

U2 - 10.4047/jap.2015.7.4.294

DO - 10.4047/jap.2015.7.4.294

M3 - Article

AN - SCOPUS:84939810150

VL - 7

SP - 294

EP - 302

JO - Journal of Advanced Prosthodontics

JF - Journal of Advanced Prosthodontics

SN - 2005-7806

IS - 4

ER -