| Autor: |
Keith SE; Harvard School of Dental Medicine, Boston, Massachusetts, USA. s_keith@hms.harvard.edu, Miller BH, Woody RD, Higginbottom FL |
| Jazyk: |
angličtina |
| Zdroj: |
The International journal of oral & maxillofacial implants [Int J Oral Maxillofac Implants] 1999 May-Jun; Vol. 14 (3), pp. 369-78. |
| Abstrakt: |
This in vitro study quantified the marginal discrepancy of the implant-to-prosthetic-crown interface on nonsubmerged dental implants restored with either a cemented or a screw-retained approach. Metal-ceramic crowns were fabricated for 20 ITI 4.1 x 10 mm solid-screw titanium implants. Ten implants received octa abutments and screw-retained crowns fabricated on premachined gold cylinders. The remaining 10 implants were restored with 5.5-mm solid abutments and metal-ceramic crowns cemented alternately with a glass-ionomer or a zinc phosphate luting agent. Inspection of the implant-crown interface was conducted using light microscopy under x 50 magnification at selected stages in the process of crown fabrication. Statistical analysis revealed a significant difference (P < .001) in the mean marginal fit between screw-retained (8.5 +/- 5.7 microns) and luted implant-supported crowns. This difference was observed both before (54.4 +/- 18.1 microns) and after cementation with glass-ionomer (57.4 +/- 20.2 microns) or zinc phosphate (67.4 +/- 15.9 microns). |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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