A Comparative Study of the Accuracy of Dental CAD Programs in Designing a Fixed Partial Denture

Yong sang Lee, Sung Yong Kim, Kyung Chul Oh, Hong Seok Moon

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Purpose: Error testing at each stage of prosthetic manufacturing remains relatively underdeveloped for computer-aided design/computer-aided manufacturing methods, and no experimental studies have validated the computer-aided design programs. This study aimed to test the accuracy and trueness of the computer-aided design of a three-unit fixed prosthesis. Materials and Methods: Three computer-aided design programs (Exocad, Dental System™, and inLab 16) were tested on the designs of a three-unit fixed partial denture, and a three-dimensional analysis program was used to calculate the internal clearance error for the computer-aided design prostheses. The Kruskal–Wallis and Dunn's post hoc tests were used to reveal significant differences in trueness between the three computer-aided design programs (α < 0.05). Results: Dental System™ showed the lowest mean error values for #24 and #26 at the mesial margin (both 0 µm), mesial wall (0.10, 0.12 µm, respectively), occlusal surface (–0.05, 0.10 µm), distal wall (0.23, –0.02 µm), and distal margin (both 0 µm). In sum, except for the mesial margin and distal margin site of tooth #26, the mean error value of Dental System™ was statistically the lowest, followed by those of Exocad and inLab 16 (p < 0.003). Conclusions: The accuracy of computer-aided design differed according to the type of computer-aided design program. Dental System™ achieved the best trueness at the margins, axial walls, and occlusal surface, followed by Exocad and inLab 16.

Original languageEnglish
Pages (from-to)215-220
Number of pages6
JournalJournal of Prosthodontics
Issue number3
Publication statusPublished - 2022 Mar

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1F1A107237012).

Publisher Copyright:
© 2021 by the American College of Prosthodontists

All Science Journal Classification (ASJC) codes

  • Dentistry(all)


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