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

Young-Hun Kwak; Sea-Han Lee; Gyeong-Je Lee; Hee-Jung Kim

doi:10.4047/jkap.2017.55.4.394

Journal List > J Korean Acad Prosthodont > v.55(4) > 1034948

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Kwak, Lee, Lee, and Kim: Artificial teeth displacement of monolithic complete denture manufactured by 3D printer and milling machine

ORIGINAL ARTICLE

J Korean Acad Prosthodont 2017;55(4):394-402.

Published online: NaN October 2017

DOI: https://doi.org/10.4047/jkap.2017.55.4.394

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

Young-Hun Kwak, Sea-Han Lee, Gyeong-Je Lee, Hee-Jung Kim^∗

Department of Prosthodontics, College of Dentistry, Chosun University, Gwangju, Republic of Korea

∗Corresponding Author: Hee-Jung Kim Department of Prosthodontics, College of Dentistry, Chosun University 309, Pilmun-daero, Dong-gu, Gwangju 61452, Republic of Korea +82 (0)62 220 3829: e-mail, khjdds@chosun.ac.kr

This study was supported by research fund from Chosun University Dental Hospital, 2016.

Received 17 July 201710 October 2017 Accepted 13 October 2017

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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 ANO-VA, 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. (J Korean Acad Prosthodont 2017;55:394-402)

Keywords: Monolithic denture, Milling, 3D printing, Artificial teeth movement

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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.

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.

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.

Fig. 4.

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

Fig. 5.

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

Fig. 6.

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

Fig. 7.

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

Fig. 8.

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

Table 1.

Mean value of distance between measuring points in upper denture (Unit: mm)

Group	AB	CD	EF	AE	AG
Up	8.173 ± 0.065	33.048 ± 0.112	55.175 ± 0.193	33.924 ± 0.146	13.240 ± 0.083
Um	8.157 ± 0.092	32.994 ± 0.109	55.105 ± 0.138	33.924 ± 0.111	13.191 ± 0.119
Uc	8.095 ± 0.048	33.000 ± 0.041	55.114 ± 0.024	33.897 ± 0.060	13.318 ± 0.027

Table 2.

Mean value of dstance between lower points (Unit: mm)

Group	ab	cd	ef	ae	ag
Lp	5.138 ± 0.115	26.680 ± 0.112	44.980 ± 0.127	29.777 ± 0.106	13.743 ± 0.103
Lm	5.208 ± 0.083	26.769 ± 0.132	45.092 ± 0.141	29.845 ± 0.147	13.694 ± 0.125
Lc	5.172 ± 0.055	26.668 ± 0.019	45.019 ± 0.055	29.789 ± 0.064	13.884 ± 0.007

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