Impact of design and length on the accuracy of closed tray transfer copings
| Autor: | Natalia Álvarez-Maldonado, Marta Vallés, Luis Carlos Garza, Miguel Roig, José Espona, Elena Roig |
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| Rok vydání: | 2019 |
| Předmět: |
Orthodontics
Prosthetic Dentistry Impression coping Coping (architecture) Safata tancada Research Significant difference 616.3 Cofia de transferencia Implant impression Cop d'impressió Impression Transfer coping Closed tray Tray Cubeta cerrada Cofia de impresión Cop de transferència Impressió d'implant Impresión de implante General Dentistry Implant supported Mathematics |
| Zdroj: | Journal of Clinical and Experimental Dentistry |
| ISSN: | 1989-5488 |
| DOI: | 10.4317/jced.55588 |
| Popis: | Background The aim of this study was to evaluate the accuracy of two closed-tray transfer copings for implant impressions (a new design vs. an old design) in two different lengths (short and long). Material and Methods Four groups of transfer copings (NS - new short, NL - new long, OS - old short and OL - old long) were tested. An epoxy resin model was prepared of missing teeth 1.4, 1.5 and 1.6. Two Alpha-Bio analogues were placed in position of teeth 1.4 and 1.6, at a 10o angulation. Two calibrated operators took 10 closed-tray impressions for each group with polyether in a Rim-Lock impression tray. Results After measuring and comparing impressions, a significant difference was found between the two new transfer copings and the old short transfer coping. Conclusions The new transfer coping design significantly improved impression accuracy. An adequate transfer coping design for the closed-tray impression technique can help to achieve clinically acceptable impressions for two-unit implant supported bridges. Key words:Closed tray, impression coping, transfer coping, implant impression. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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