Abstract
PURPOSE. One of the most important factors in evaluating the quality of fixed dental prostheses (FDPs) is their gap. The purpose of this study was to compare the marginal and internal gap of two different metal-ceramic crowns, casting and selective laser sintering (SLS), before and after porcelain firing. Furthermore, this study evaluated whether metal-ceramic crowns made using the SLS have the same clinical acceptability as crowns made by the traditional casting. MATERIALS AND METHODS. The 10 study models were produced using stone. The 20 specimens were produced using the casting and the SLS methods; 10 samples were made in each group. After the core gap measurements, 10 metal-ceramic crowns in each group were finished using the conventional technique of firing porcelain. The gap of the metal-ceramic crowns was measured. The marginal and internal gaps were measured by two-dimensional and three-dimensional replica techniques, respectively. The Wilcoxon signed-rank test, the Wilcoxon rank-sum test and nonparametric ANCOVA were used for statistical analysis (a=05). RESULTS. In both groups, the gap increased after completion of the metal-ceramic crown compared to the core. In all measured areas, the gap of the metal cores and metal-ceramic crowns produced by the SLS was greater than that of the metal cores and metal-ceramic crowns produced using the casting. Statistically significant differences were found between cast and SLS (metal cores and metal-ceramic crown). CONCLUSION. Although the gap of the FDPs produced by the SLS was greater than that of the FDPs produced by the conventional casting in all measured areas, none exceeded the clinically acceptable range. [ J Adv Prosthodont 2013;5:179-86].
| Original language | English |
|---|---|
| Pages (from-to) | 179-186 |
| Number of pages | 8 |
| Journal | Journal of Advanced Prosthodontics |
| Volume | 5 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2013 Sep 3 |
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Keywords
- CAD-CAM
- Marginal adaptation
- Metal ceramics restorations
- Replica techniques
ASJC Scopus subject areas
- Dentistry (miscellaneous)
- Oral Surgery
Cite this
Evaluation of the marginal and internal gap of metal-ceramic crown fabricated with a selective laser sintering technology : Two- and threedimensional replica techniques. / Kim, Ki Baek; Kim, Jae Hong; Kim, Woong Chul; Kim, Hae-Young; Kim, Ji Hwan.
In: Journal of Advanced Prosthodontics, Vol. 5, No. 2, 03.09.2013, p. 179-186.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Evaluation of the marginal and internal gap of metal-ceramic crown fabricated with a selective laser sintering technology
T2 - Two- and threedimensional replica techniques
AU - Kim, Ki Baek
AU - Kim, Jae Hong
AU - Kim, Woong Chul
AU - Kim, Hae-Young
AU - Kim, Ji Hwan
PY - 2013/9/3
Y1 - 2013/9/3
N2 - PURPOSE. One of the most important factors in evaluating the quality of fixed dental prostheses (FDPs) is their gap. The purpose of this study was to compare the marginal and internal gap of two different metal-ceramic crowns, casting and selective laser sintering (SLS), before and after porcelain firing. Furthermore, this study evaluated whether metal-ceramic crowns made using the SLS have the same clinical acceptability as crowns made by the traditional casting. MATERIALS AND METHODS. The 10 study models were produced using stone. The 20 specimens were produced using the casting and the SLS methods; 10 samples were made in each group. After the core gap measurements, 10 metal-ceramic crowns in each group were finished using the conventional technique of firing porcelain. The gap of the metal-ceramic crowns was measured. The marginal and internal gaps were measured by two-dimensional and three-dimensional replica techniques, respectively. The Wilcoxon signed-rank test, the Wilcoxon rank-sum test and nonparametric ANCOVA were used for statistical analysis (a=05). RESULTS. In both groups, the gap increased after completion of the metal-ceramic crown compared to the core. In all measured areas, the gap of the metal cores and metal-ceramic crowns produced by the SLS was greater than that of the metal cores and metal-ceramic crowns produced using the casting. Statistically significant differences were found between cast and SLS (metal cores and metal-ceramic crown). CONCLUSION. Although the gap of the FDPs produced by the SLS was greater than that of the FDPs produced by the conventional casting in all measured areas, none exceeded the clinically acceptable range. [ J Adv Prosthodont 2013;5:179-86].
AB - PURPOSE. One of the most important factors in evaluating the quality of fixed dental prostheses (FDPs) is their gap. The purpose of this study was to compare the marginal and internal gap of two different metal-ceramic crowns, casting and selective laser sintering (SLS), before and after porcelain firing. Furthermore, this study evaluated whether metal-ceramic crowns made using the SLS have the same clinical acceptability as crowns made by the traditional casting. MATERIALS AND METHODS. The 10 study models were produced using stone. The 20 specimens were produced using the casting and the SLS methods; 10 samples were made in each group. After the core gap measurements, 10 metal-ceramic crowns in each group were finished using the conventional technique of firing porcelain. The gap of the metal-ceramic crowns was measured. The marginal and internal gaps were measured by two-dimensional and three-dimensional replica techniques, respectively. The Wilcoxon signed-rank test, the Wilcoxon rank-sum test and nonparametric ANCOVA were used for statistical analysis (a=05). RESULTS. In both groups, the gap increased after completion of the metal-ceramic crown compared to the core. In all measured areas, the gap of the metal cores and metal-ceramic crowns produced by the SLS was greater than that of the metal cores and metal-ceramic crowns produced using the casting. Statistically significant differences were found between cast and SLS (metal cores and metal-ceramic crown). CONCLUSION. Although the gap of the FDPs produced by the SLS was greater than that of the FDPs produced by the conventional casting in all measured areas, none exceeded the clinically acceptable range. [ J Adv Prosthodont 2013;5:179-86].
KW - CAD-CAM
KW - Marginal adaptation
KW - Metal ceramics restorations
KW - Replica techniques
UR - http://www.scopus.com/inward/record.url?scp=84883149324&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84883149324&partnerID=8YFLogxK
U2 - 10.4047/jap.2013.5.2.179
DO - 10.4047/jap.2013.5.2.179
M3 - Article
C2 - 23755345
AN - SCOPUS:84883149324
VL - 5
SP - 179
EP - 186
JO - Journal of Advanced Prosthodontics
JF - Journal of Advanced Prosthodontics
SN - 2005-7806
IS - 2
ER -