J Korean Acad Prosthodont.  2017 Oct;55(4):394-402. 10.4047/jkap.2017.55.4.394.

Artificial teeth displacement of monolithic complete denture manufactured by 3D printer and milling machine

• Kwak YH
• Lee SH
• Lee GJ
• Kim HJ

• KMID: 2393911
• DOI: http://doi.org/10.4047/jkap.2017.55.4.394

Abstract

PURPOSE
The purpose of this study is to evaluate the displacement of artificial tooth of monolithic complete denture manufactured by milling and 3D printing method in which the denture base and the artificial teeth are simultaneously made.
MATERIALS AND METHODS
Twelve upper and lower complete dentures for each were made by milling and 3D printing method. Group Up and Group Lp are a group of upper and lower dentures made by printing, and Group Um and Group Lm are denture groups made by milling. Group Uc and Group Lc are is a group of finally designed upper and lower dentures respectively. Measurements were performed between both central incisors (AB, ab), both canines (CD, cd), both first molars (EF, ef), between an incisor and a first molar (AE, ae), and between incisor and lingual point (AG, ag) for each upper and lower denture.
RESULTS
AG and ag value between printed dentures and original ones as well as between milled dentures and original ones showed a statistically significant difference (One-way ANOVA, P<.05) in both lower and upper monolithic dentures. In the lower monolithic ones, ab, cd and ef value revealed a significant difference between Group Lp and Group Lm (One-way ANOVA, P<.05).
CONCLUSION
Dentures made using milling or 3D printers revealed statistically significant difference compared with those of original data. However, it showed clinically very accurate reproducibility.

Keyword

Monolithic denture; Milling; 3D printing; Artificial teeth movement

MeSH Terms

Denture Bases
Denture, Complete*
Dentures
Incisor
Methods
Molar
Printing, Three-Dimensional*
Tooth, Artificial*

Figure

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  Fig. 1. Measuring points designed on the image of upper denture. (A) 3 dimensional image of upper denture with seven measuring points (A - F), (B) measuring points of upper anterior region, (C) measuring ones of upper molars.

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  Fig. 2. Measuring points designed on the image of lower denture. (A) 3 dimensional image of lower denture with seven measuring points (a - f), (B) measuring points of lower anterior region, (C) measuring ones of lower molars.

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  Fig. 3. Monolithic complete denture made by 3D Printer and milling machine. (A, B) upper and lower one by 3D printer, (C, D) upper and lower one by milling machine.

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  Fig. 4. Distance between A and G point. †, ‡ mean a statistical difference (P < .05).

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  Fig. 5. Distance between a and b point. † means a statistical difference (P < .05).

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  Fig. 6. Distance between c and d point. † means a statistical difference (P < .05).

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  Fig. 7. Distance between e and f point. † means a statistical difference (P < .05).

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  Fig. 8. Distance between a and g point. †, ‡means a statistical difference (P < .05).

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