Abstract
PURPOSE. The purpose of this study was to evaluate the marginal and internal gaps of Ni-Cr and Co-Cr copings, fabricated using the dental μ-SLA system. MATERIALS AND METHODS. Ten study dies were made using a twostep silicone impression with a dental stone (type IV) from the master die of a tooth. Ni-Cr (NC group) and Co-Cr (CC group) alloy copings were designed using a dental scanner, CAD software, resin coping, and casting process. In addition, 10 Ni-Cr alloy copings were manufactured using the lost-wax technique (LW group). The marginal and internal gaps in the 3 groups were measured using a digital microscope (160 ×) with the silicone replica technique, and the obtained data were analyzed using the non-parametric Kruskal-Wallis H test. Post-hoc comparisons were performed using Bonferroni-corrected Mann-Whitney U tests (α=.05). RESULTS. The mean (± standard deviation) values of the marginal, chamfer, axial wall, and occlusal gaps in the 3 groups were as follows: 81.5±73.8, 98.1±76.1, 87.1±44.8, and 146.8±78.7 μm in the LW group; 76.8±48.0, 141.7±57.1, 80.7±47.5, and 194.69±63.8 μm in the NC group; and 124.2±52.0, 199.5±71.0, 67.1±37.6, and 244.5±58.9 μm in the CC group. CONCLUSION. The marginal gap in the LW and NC groups were clinically acceptable. Further improvement is needed for CC group to be used clinical practice.
| Original language | English |
|---|---|
| Pages (from-to) | 176-181 |
| Number of pages | 6 |
| Journal | Journal of Advanced Prosthodontics |
| Volume | 9 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2017 Jun 1 |
Fingerprint
Keywords
- CAD/CAM
- Cobalt-chromium
- Internal gap
- Marginal gap
ASJC Scopus subject areas
- Oral Surgery
- Dentistry (miscellaneous)
Cite this
Evaluation of marginal and internal gaps of Ni-Cr and Co-Cr alloy copings manufactured by microstereolithography. / Kim, Dong Yeon; Kim, Chong Myeong; Kim, Ji Hwan; Kim, Hae-Young; Kim, Woong Chul.
In: Journal of Advanced Prosthodontics, Vol. 9, No. 3, 01.06.2017, p. 176-181.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Evaluation of marginal and internal gaps of Ni-Cr and Co-Cr alloy copings manufactured by microstereolithography
AU - Kim, Dong Yeon
AU - Kim, Chong Myeong
AU - Kim, Ji Hwan
AU - Kim, Hae-Young
AU - Kim, Woong Chul
PY - 2017/6/1
Y1 - 2017/6/1
N2 - PURPOSE. The purpose of this study was to evaluate the marginal and internal gaps of Ni-Cr and Co-Cr copings, fabricated using the dental μ-SLA system. MATERIALS AND METHODS. Ten study dies were made using a twostep silicone impression with a dental stone (type IV) from the master die of a tooth. Ni-Cr (NC group) and Co-Cr (CC group) alloy copings were designed using a dental scanner, CAD software, resin coping, and casting process. In addition, 10 Ni-Cr alloy copings were manufactured using the lost-wax technique (LW group). The marginal and internal gaps in the 3 groups were measured using a digital microscope (160 ×) with the silicone replica technique, and the obtained data were analyzed using the non-parametric Kruskal-Wallis H test. Post-hoc comparisons were performed using Bonferroni-corrected Mann-Whitney U tests (α=.05). RESULTS. The mean (± standard deviation) values of the marginal, chamfer, axial wall, and occlusal gaps in the 3 groups were as follows: 81.5±73.8, 98.1±76.1, 87.1±44.8, and 146.8±78.7 μm in the LW group; 76.8±48.0, 141.7±57.1, 80.7±47.5, and 194.69±63.8 μm in the NC group; and 124.2±52.0, 199.5±71.0, 67.1±37.6, and 244.5±58.9 μm in the CC group. CONCLUSION. The marginal gap in the LW and NC groups were clinically acceptable. Further improvement is needed for CC group to be used clinical practice.
AB - PURPOSE. The purpose of this study was to evaluate the marginal and internal gaps of Ni-Cr and Co-Cr copings, fabricated using the dental μ-SLA system. MATERIALS AND METHODS. Ten study dies were made using a twostep silicone impression with a dental stone (type IV) from the master die of a tooth. Ni-Cr (NC group) and Co-Cr (CC group) alloy copings were designed using a dental scanner, CAD software, resin coping, and casting process. In addition, 10 Ni-Cr alloy copings were manufactured using the lost-wax technique (LW group). The marginal and internal gaps in the 3 groups were measured using a digital microscope (160 ×) with the silicone replica technique, and the obtained data were analyzed using the non-parametric Kruskal-Wallis H test. Post-hoc comparisons were performed using Bonferroni-corrected Mann-Whitney U tests (α=.05). RESULTS. The mean (± standard deviation) values of the marginal, chamfer, axial wall, and occlusal gaps in the 3 groups were as follows: 81.5±73.8, 98.1±76.1, 87.1±44.8, and 146.8±78.7 μm in the LW group; 76.8±48.0, 141.7±57.1, 80.7±47.5, and 194.69±63.8 μm in the NC group; and 124.2±52.0, 199.5±71.0, 67.1±37.6, and 244.5±58.9 μm in the CC group. CONCLUSION. The marginal gap in the LW and NC groups were clinically acceptable. Further improvement is needed for CC group to be used clinical practice.
KW - CAD/CAM
KW - Cobalt-chromium
KW - Internal gap
KW - Marginal gap
UR - http://www.scopus.com/inward/record.url?scp=85021148541&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85021148541&partnerID=8YFLogxK
U2 - 10.4047/jap.2017.9.3.176
DO - 10.4047/jap.2017.9.3.176
M3 - Article
AN - SCOPUS:85021148541
VL - 9
SP - 176
EP - 181
JO - Journal of Advanced Prosthodontics
JF - Journal of Advanced Prosthodontics
SN - 2005-7806
IS - 3
ER -