Abstract
PURPOSE. This study aimed to investigate the potential clinical application of digitized silicone rubber impressions by comparing the accuracy of zirconia 3-unit fixed partial dentures (FPDs) fabricated from 2 types of data (working model and impression) obtained from a laser scanner. MATERIALS AND METHODS. Ten working models and impressions were prepared with epoxy resin and vinyl polysiloxane, respectively. Based on the data obtained from the laser scanner (D-700; 3Shape A/S, Copenhagen, Denmark), a total of 20 zirconia frameworks were prepared using a dental CAD/CAM system (DentalDesigner; 3shape A/S, Copenhagen, Denmark / Ener-mill, Dentaim, Seoul, Korea). The silicone replicas were sectioned into four pieces to evaluate the framework fit. The replicas were imaged using a digital microscope, and the fit of the reference points (P1, P2, P3, P4, P5, P6, and P7) were measured using the program in the device. Measured discrepancies were divided into 5 categories of gaps (MG, CG, AWG, AOTG, OG). Data were analyzed with Student's t-test (a=0.05), repeated measures ANOVA and twoway ANOVA (a=0.05). RESULTS. The mean gap of the zirconia framework prepared from the working models presented a narrower discrepancy than the frameworks fabricated from the impression bodies. The mean of the total gap in premolars (P=.003) and molars (P=.002) exhibited a statistical difference between two groups. CONCLUSION. The mean gap dimensions of each category showed statistically significant difference. Nonetheless, the digitized impression bodies obtained with a laser scanner were applicable to clinical settings, considering the clinically acceptable marginal fit (120 μm).
| Original language | English |
|---|---|
| Pages (from-to) | 22-29 |
| Number of pages | 8 |
| Journal | Journal of Advanced Prosthodontics |
| Volume | 6 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2014 Feb 1 |
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Keywords
- Dental CAD/CAM system
- Digitization of impression bodies
- Internal gap
- Marginal gap
- Zirconia three-unit FPDs
ASJC Scopus subject areas
- Dentistry (miscellaneous)
- Oral Surgery
Cite this
Evaluation of different approaches for using a laser scanner in digitization of dental impressions. / Lee, Wan Sun; Kim, Woong Chul; Kim, Hae-Young; Kim, Wook Tae; Kim, Ji Hwan.
In: Journal of Advanced Prosthodontics, Vol. 6, No. 1, 01.02.2014, p. 22-29.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Evaluation of different approaches for using a laser scanner in digitization of dental impressions
AU - Lee, Wan Sun
AU - Kim, Woong Chul
AU - Kim, Hae-Young
AU - Kim, Wook Tae
AU - Kim, Ji Hwan
PY - 2014/2/1
Y1 - 2014/2/1
N2 - PURPOSE. This study aimed to investigate the potential clinical application of digitized silicone rubber impressions by comparing the accuracy of zirconia 3-unit fixed partial dentures (FPDs) fabricated from 2 types of data (working model and impression) obtained from a laser scanner. MATERIALS AND METHODS. Ten working models and impressions were prepared with epoxy resin and vinyl polysiloxane, respectively. Based on the data obtained from the laser scanner (D-700; 3Shape A/S, Copenhagen, Denmark), a total of 20 zirconia frameworks were prepared using a dental CAD/CAM system (DentalDesigner; 3shape A/S, Copenhagen, Denmark / Ener-mill, Dentaim, Seoul, Korea). The silicone replicas were sectioned into four pieces to evaluate the framework fit. The replicas were imaged using a digital microscope, and the fit of the reference points (P1, P2, P3, P4, P5, P6, and P7) were measured using the program in the device. Measured discrepancies were divided into 5 categories of gaps (MG, CG, AWG, AOTG, OG). Data were analyzed with Student's t-test (a=0.05), repeated measures ANOVA and twoway ANOVA (a=0.05). RESULTS. The mean gap of the zirconia framework prepared from the working models presented a narrower discrepancy than the frameworks fabricated from the impression bodies. The mean of the total gap in premolars (P=.003) and molars (P=.002) exhibited a statistical difference between two groups. CONCLUSION. The mean gap dimensions of each category showed statistically significant difference. Nonetheless, the digitized impression bodies obtained with a laser scanner were applicable to clinical settings, considering the clinically acceptable marginal fit (120 μm).
AB - PURPOSE. This study aimed to investigate the potential clinical application of digitized silicone rubber impressions by comparing the accuracy of zirconia 3-unit fixed partial dentures (FPDs) fabricated from 2 types of data (working model and impression) obtained from a laser scanner. MATERIALS AND METHODS. Ten working models and impressions were prepared with epoxy resin and vinyl polysiloxane, respectively. Based on the data obtained from the laser scanner (D-700; 3Shape A/S, Copenhagen, Denmark), a total of 20 zirconia frameworks were prepared using a dental CAD/CAM system (DentalDesigner; 3shape A/S, Copenhagen, Denmark / Ener-mill, Dentaim, Seoul, Korea). The silicone replicas were sectioned into four pieces to evaluate the framework fit. The replicas were imaged using a digital microscope, and the fit of the reference points (P1, P2, P3, P4, P5, P6, and P7) were measured using the program in the device. Measured discrepancies were divided into 5 categories of gaps (MG, CG, AWG, AOTG, OG). Data were analyzed with Student's t-test (a=0.05), repeated measures ANOVA and twoway ANOVA (a=0.05). RESULTS. The mean gap of the zirconia framework prepared from the working models presented a narrower discrepancy than the frameworks fabricated from the impression bodies. The mean of the total gap in premolars (P=.003) and molars (P=.002) exhibited a statistical difference between two groups. CONCLUSION. The mean gap dimensions of each category showed statistically significant difference. Nonetheless, the digitized impression bodies obtained with a laser scanner were applicable to clinical settings, considering the clinically acceptable marginal fit (120 μm).
KW - Dental CAD/CAM system
KW - Digitization of impression bodies
KW - Internal gap
KW - Marginal gap
KW - Zirconia three-unit FPDs
UR - http://www.scopus.com/inward/record.url?scp=84897810281&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84897810281&partnerID=8YFLogxK
U2 - 10.4047/jap.2014.6.1.22
DO - 10.4047/jap.2014.6.1.22
M3 - Article
AN - SCOPUS:84897810281
VL - 6
SP - 22
EP - 29
JO - Journal of Advanced Prosthodontics
JF - Journal of Advanced Prosthodontics
SN - 2005-7806
IS - 1
ER -