The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Regina Mericskestern - One of the best experts on this subject based on the ideXlab platform.
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vinylsiloxanether a new Impression Material clinical study of implant Impressions with vinylsiloxanether versus polyether Materials
Clinical Implant Dentistry and Related Research, 2012Co-Authors: Norbert Enkling, Stefan Bayer, Peter Johren, Regina MericskesternAbstract:The performance of three elastomeric Materials for the open monophase implant Impressions technique was tested under the following clinical conditions: polyether (IM) and vinylsiloxanether without (ID) and with additional simultaneous splinting of the implant Impression copings with a higher shore hardness A-silicone (IDF).
Carl J Andres - One of the best experts on this subject based on the ideXlab platform.
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dimensional accuracy of dental casts influence of tray Material Impression Material and time
Journal of Prosthodontics, 2002Co-Authors: Sudsukh Thongthammachat, Keith B Moore, Thomas M Barco, Suteera Hovijitra, David T Brown, Carl J AndresAbstract:Purpose This study evaluated the influence on dimensional accuracy of dental casts made with different types of trays and Impression Materials and poured at different and multiple times. Materials and Methods Two types of stock trays (plastic stock tray, perforated metal stock tray) and 4 types of custom tray Materials (autopolymerizing acrylic resin, thermoplastic resin, and 2 types of light-polymerized acrylic resins) were used with 2 types of Impression Materials (addition polymerizing silicone and polyether), to make Impressions of a metal master model. Each tray and Impression Material was used to make 5 Impressions. Casts were made by multiple pourings at 30 minutes, 6 hours, 24 hours, and 30 days after Impression making. Using a measuring microscope, 12 distances were calculated based on measurements of 8 reference points. The absolute value of the difference of each measurement was calculated, as was the corresponding measurement on the master model. A Bayesian model using a simple noninformative prior was used to analyze these data. Results Statistical differences within 6 μm were found only with thermoplastic resin tray Material for addition silicone, and for thermoplastic resin tray Material and 1 type of light-polymerized acrylic resin for polyether. Neither stock trays nor custom trays contributed to the differences in accuracy of the casts. All deviations in casts made with silicone Impression Material were within a clinically acceptable range. For the polyether, distortions occurred that were clinically unacceptable. Impressions made from polyether distorted over time. Silicone Impression Material has dimensional stability up to 30 days. Conclusion Accurate casts can be made with either stock trays or custom trays. An Impression made from polyether should be poured only once and within 24 hours after Impression making, because of the distortion of the Material over time. Silicone Impression Material has better dimensional stability than polyether.
Norbert Enkling - One of the best experts on this subject based on the ideXlab platform.
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vinylsiloxanether a new Impression Material clinical study of implant Impressions with vinylsiloxanether versus polyether Materials
Clinical Implant Dentistry and Related Research, 2012Co-Authors: Norbert Enkling, Stefan Bayer, Peter Johren, Regina MericskesternAbstract:The performance of three elastomeric Materials for the open monophase implant Impressions technique was tested under the following clinical conditions: polyether (IM) and vinylsiloxanether without (ID) and with additional simultaneous splinting of the implant Impression copings with a higher shore hardness A-silicone (IDF).
Sudsukh Thongthammachat - One of the best experts on this subject based on the ideXlab platform.
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dimensional accuracy of dental casts influence of tray Material Impression Material and time
Journal of Prosthodontics, 2002Co-Authors: Sudsukh Thongthammachat, Keith B Moore, Thomas M Barco, Suteera Hovijitra, David T Brown, Carl J AndresAbstract:Purpose This study evaluated the influence on dimensional accuracy of dental casts made with different types of trays and Impression Materials and poured at different and multiple times. Materials and Methods Two types of stock trays (plastic stock tray, perforated metal stock tray) and 4 types of custom tray Materials (autopolymerizing acrylic resin, thermoplastic resin, and 2 types of light-polymerized acrylic resins) were used with 2 types of Impression Materials (addition polymerizing silicone and polyether), to make Impressions of a metal master model. Each tray and Impression Material was used to make 5 Impressions. Casts were made by multiple pourings at 30 minutes, 6 hours, 24 hours, and 30 days after Impression making. Using a measuring microscope, 12 distances were calculated based on measurements of 8 reference points. The absolute value of the difference of each measurement was calculated, as was the corresponding measurement on the master model. A Bayesian model using a simple noninformative prior was used to analyze these data. Results Statistical differences within 6 μm were found only with thermoplastic resin tray Material for addition silicone, and for thermoplastic resin tray Material and 1 type of light-polymerized acrylic resin for polyether. Neither stock trays nor custom trays contributed to the differences in accuracy of the casts. All deviations in casts made with silicone Impression Material were within a clinically acceptable range. For the polyether, distortions occurred that were clinically unacceptable. Impressions made from polyether distorted over time. Silicone Impression Material has dimensional stability up to 30 days. Conclusion Accurate casts can be made with either stock trays or custom trays. An Impression made from polyether should be poured only once and within 24 hours after Impression making, because of the distortion of the Material over time. Silicone Impression Material has better dimensional stability than polyether.
Peter Johren - One of the best experts on this subject based on the ideXlab platform.
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vinylsiloxanether a new Impression Material clinical study of implant Impressions with vinylsiloxanether versus polyether Materials
Clinical Implant Dentistry and Related Research, 2012Co-Authors: Norbert Enkling, Stefan Bayer, Peter Johren, Regina MericskesternAbstract:The performance of three elastomeric Materials for the open monophase implant Impressions technique was tested under the following clinical conditions: polyether (IM) and vinylsiloxanether without (ID) and with additional simultaneous splinting of the implant Impression copings with a higher shore hardness A-silicone (IDF).
