Assessment of impression material accuracy in complete-arch restorations on four implants
Autor: | Francesco Ghelli, Maria Rosaria Gatto, Paolo Baldissara, Roberto Meneghello, Aion Mangino Messias, Leonardo Ciocca, Brunilda Koci |
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Přispěvatelé: | Baldissara P., Koci B., Messias A.M., Meneghello R., Ghelli F., Gatto M.R., Ciocca L. |
Rok vydání: | 2021 |
Předmět: |
Accuracy and precision
Dental Impression Technique Materials science medicine.medical_treatment Dentistry implant restorations impression material accuracy New materials Prosthesis 03 medical and health sciences 0302 clinical medicine medicine Humans implant restorations impression material Dental Implants Material type accuracy Coping (architecture) Dental Impression Materials 030206 dentistry Models Dental Impression Polyvinyl siloxane Accuracy impression material metrology implant Dentistry Implant Oral Surgery Biomedical engineering |
Zdroj: | The Journal of Prosthetic Dentistry. 126:763-771 |
ISSN: | 0022-3913 |
Popis: | Statement of problem: New polyvinyl siloxane (PVS) materials with enhanced properties have been developed to improve and facilitate implant impression techniques. However, studies on their accuracy are lacking. Purpose: The purpose of this in vitro study was to determine the accuracy and precision of implant impressions made with some recently introduced materials on a simulated patient requiring an all-on-4 implant-supported prosthesis. Well-established polyether materials were also evaluated as a comparison. The variables considered were material type, consistency, splinting or not splinting techniques, and implant angulation. Material and methods: A reference master model was made by inserting 4 implants at angles of 0, 5, and 10 degrees. Eighty impressions were made at 37 °C in wet conditions by using a standardized technique. Eight groups (n=10) were created using monophasic, single-viscosity materials (Hydrorise Implant Medium, HIM-ns; Hydrorise Implant Medium, HIM; Honigum Mono, HM; Impregum, IMP), and 2-viscosity materials (Hydrorise Implant Heavy+Light-ns, HIH+L-ns; Hydrorise Implant Heavy+Light, HIH+L; Honigum Heavy+Light, HH+L; and Permadyne and Garant [Heavy+Light, PeH+L]). Hydrorise materials were used with splinting and not splinting (ns) techniques. The reference points located on the connecting platforms of the transfer copings (TCP) were compared with the same points on the implant connecting platforms (ICP) located in the reference model. The accuracy and precision of the impressions were determined as linear 3D errors and standard deviation between each TCP-ICP couple by using an optical coordinate measuring machine (OCMM). Results: PVS materials were generally better than polyether materials, with Hydrorise materials (HIM and HIH+L) showing significantly better accuracy and precision (30.9 ±14.4 μm and 28.7 ±15.5 μm, respectively) than IMP and PeH+L polyethers (44.2 ±16 μm and 43.8 ±17.6 μm, respectively; P |
Databáze: | OpenAIRE |
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