Abstract
Statement of problem
Dental computer-aided design (CAD) software programs are essential elements of the
digital workflow. Therefore, it is necessary to study the learning effect of dental
CAD software programs for efficient use.
Purpose
The purpose of this in vitro study was to predict the learning curve of dental CAD
software programs according to dental personnel by using the Wright model and to investigate
the tendency of dental personnel to reduce working time according to repeated learning.
Material and methods
A total of 36 participants were recruited, including an equal number of dentists,
dental technicians, and dental students (12 each). A custom abutment design was evaluated
by using exocad CAD and Deltanine CAD software programs. The design was carried out
in the following order: 4 steps repeated 3 times each. This study applied the formula
of the Wright model to predict 500 repetitive times. In the statistical analysis,
3-repetition and 500-repetition times were analyzed with the Kruskal-Wallis H test
and Friedman test (α=.05), and a post hoc comparison was performed by using the Mann-Whitney
U-test and Bonferroni correction method (α=.017).
Results
Three repetitions resulted in shorter working time in the dental technician group.
The 3-repetition time decreased statistically for all dental personnel (P<.001). The time for 500 repetitions showed a statistically significant difference
according to the type of dental personnel (P=.036), but no significant difference was found after the fourth iteration (fifth
iteration: P=.076). Furthermore, the estimated time of 500 iterations decreased statistically
significantly from the first to the 500th iteration (P<.001).
Conclusions
All dental personnel showed learning effects of dental CAD software programs. Although
the dental technician group initially showed less working time, after initial learning,
the same learning effect appeared, regardless of the type of dental personnel.
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Article info
Publication history
Published online: October 04, 2019
Footnotes
Supported by the Institute for Information and Communications Technology Promotion (IITP) grant funded by the Korea government (MSIP) (B0101-19-1081, development of ICT-based software platform and service technologies for medical 3D printing applications) and Industrial Strategic Technology Development Program (10062635, new hybrid milling machine with a resolution of less than 10 μm development, using open CAD-CAM S/W integrated platforms for one-day prosthetic treatment of 3D smart medical care system) funded By the Ministry of Trade, Industry and Energy (MOTIE, Korea).
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© 2019 by the Editorial Council for The Journal of Prosthetic Dentistry.
