• 대한치과보철학회:학술대회논문집
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• 1997.11a
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• pp.49-49
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• 1997

• The Journal of Korean Academy of Prosthodontics
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• v.55 no.4
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• pp.372-380
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• 2017

This study was conducted to compare the marginal and internal fit of all ceramic crown using the replica technique and the triple-scan protocol. Materials and methods: Twenty zirconia ceramic crowns were fabricated using titanium abutment model. All crowns were divided into two groups of 10 each, depending on the replica technique and the triple-scan protocol. The internal and marginal fit of 10 zirconia ceramic crowns were measured at 17 points for each specimen using the replica technique. The other 10 ceramic crowns were measured using the triple-scan protocol. Statistical analysis was performed by t-test (${\alpha}=.05$). Results: The mean and standard deviation of marginal and internal fit were significantly different between the replica technique ($49.86{\pm}29.69{\mu}m$) and triple-scan protocol ($75.35{\pm}64.73{\mu}m$, P<.001). The mean and standard deviation of internal fit except marginal fit were $58.38{\pm}31.77{\mu}m$ and $64.00{\pm}46.43{\mu}m$, respectively (P>.343). Conclusion: There was a statistically significant difference in the marginal fit measured by the two methods. However, there was no statistically significant difference in the internal fit between the two methods.

• Journal of dental hygiene science
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• v.13 no.2
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• pp.135-141
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• 2013

One factor for successful prognosis of finished dental prosthesis is good marginal fit. The purpose of this study in vitro investigation was to compare the marginal fit of all-ceramic crown before and after porcelain veneering, to evaluate the influence of high temperature of the porcelain firing on the fit. For this experiment, model of abutment tooth of maxillary right central incisor was prepared. Ten working models were produced. Ten zirconia cores were made by dental computer aided design/computer aided manufacturing system. The marginal fit of specimens were examined using silicone replica technique. Silicone replicas were sectioned four times and were measured through a digital microscope (${\times}160$). Marginal fit is a distance connected between edge end part of specimen and abutment margin. Each specimens was measured twice, the first measurement was done prior to veneering porcelain firing, while the second measurement was done after the porcelain firing to evaluate this process. Statistical analyses were performed with paired t-test. $Mean{\pm}SD$ marginal fit was $60.8{\pm}14.2{\mu}m$ for zirconia core and $86.1{\pm}13.3{\mu}m$ for all-ceramic crown. They were statistically significant differences (p<0.001). But all specimens showed a marginal fit where the gap widths ranged within the clinical recommendation ($120{\mu}m$), all-ceramic crown production using the zirconia core was adequate.

• 대한치과보철학회:학술대회논문집
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• 1998.11a
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• pp.73-73
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• 1998

• 대한치과보철학회:학술대회논문집
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• 1996.11a
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• pp.72-73
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• 1996

• 대한치과보철학회:학술대회논문집
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• 1999.11a
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• pp.52-52
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• 1999

• 대한치과보철학회:학술대회논문집
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• 1999.11a
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• pp.62-62
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• 1999

• 대한치과보철학회:학술대회논문집
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• 1994.12a
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• pp.46-46
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• 1994

• The Journal of the Korean dental association
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• v.35 no.9 s.340
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• pp.671-671
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• 1997

• 대한치과보철학회:학술대회논문집
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• 2002.11a
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• pp.109-109
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• 2002