Accuracy and precision of polyurethane dental arch models fabricated using a three-dimensional subtractive rapid prototyping method with an intraoral scanning technique

Jae Hong Kim, Ki Baek Kim, Woong Chul Kim, Ji Hwan Kim, Hae-Young Kim

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Objective: This study aimed to evaluate the accuracy and precision of polyurethane (PUT) dental arch models fabricated using a three-dimensional (3D) subtractive rapid prototyping (RP) method with an intraoral scanning technique by comparing linear measurements obtained from PUT models and conventional plaster models. Methods: Ten plaster models were duplicated using a selected standard master model and conventional impression, and 10 PUT models were duplicated using the 3D subtractive RP technique with an oral scanner. Six linear measurements were evaluated in terms of x, y, and z-axes using a non-contact white light scanner. Accuracy was assessed using mean differences between two measurements, and precision was examined using four quantitative methods and the Bland-Altman graphical method. Repeatability was evaluated in terms of intra-examiner variability, and reproducibility was assessed in terms of inter-examiner and inter-method variability. Results: The mean difference between plaster models and PUT models ranged from 0.07 mm to 0.33 mm. Relative measurement errors ranged from 2.2% to 7.6% and intraclass correlation coefficients ranged from 0.93 to 0.96, when comparing plaster models and PUT models. The Bland-Altman plot showed good agreement. Conclusions: The accuracy and precision of PUT dental models for evaluating the performance of oral scanner and subtractive RP technology was acceptable. Because of the recent improvements in block material and computerized numeric control milling machines, the subtractive RP method may be a good choice for dental arch models.

Original languageEnglish
Pages (from-to)69-76
Number of pages8
JournalKorean Journal of Orthodontics
Volume44
Issue number2
DOIs
Publication statusPublished - 2014 Jan 1

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Dental Models
Dental Arch
Polyurethanes
Technology
Light

Keywords

  • Accuracy
  • Intraoral scanning
  • Precision
  • Three-dimensional subtractive rapid prototyping

ASJC Scopus subject areas

  • Orthodontics

Cite this

Accuracy and precision of polyurethane dental arch models fabricated using a three-dimensional subtractive rapid prototyping method with an intraoral scanning technique. / Kim, Jae Hong; Kim, Ki Baek; Kim, Woong Chul; Kim, Ji Hwan; Kim, Hae-Young.

In: Korean Journal of Orthodontics, Vol. 44, No. 2, 01.01.2014, p. 69-76.

Research output: Contribution to journalArticle

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