Evaluation of different approaches for using a laser scanner in digitization of dental impressions
The Journal of Advanced Prosthodontics
;
: 22-29, 2014.
Article
in English
| WPRIM
| ID: wpr-192399
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 ANDMETHODS:
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 (alpha=0.05), repeated measures ANOVA and two-way ANOVA (alpha=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 microm).
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Silicone Elastomers
/
Siloxanes
/
Bicuspid
/
Denmark
/
Denture, Partial, Fixed
/
Seoul
/
Molar
Country/Region as subject:
Asia
/
Europa
Language:
English
Journal:
The Journal of Advanced Prosthodontics
Year:
2014
Type:
Article
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