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Relevant bibliographies by topics / Polyvinylsiloxane

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Journal articles
Dissertations / Theses

Academic literature on the topic 'Polyvinylsiloxane'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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Journal articles on the topic "Polyvinylsiloxane"

1

McCabe, J. F. "A polyvinylsiloxane denture soft lining material." Journal of Dentistry 26, no. 5-6 (July 1998): 521–26. http://dx.doi.org/10.1016/s0300-5712(98)00022-0.

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Pereira, Jefferson Ricardo, Janaina Salomon Ghizoni, Paulo Henrique Orlato Rossetti, Naudy Brodbeck May, and Accácio Lins do Valle. "Imperfections in plaster surfaces caused by the release of hydrogen gas of polyvinylsiloxane impression materials." Journal of Research in Dentistry 1, no. 2 (September 7, 2013): 98. http://dx.doi.org/10.19177/jrd.v1e2201398-106.

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Purpose: The purpose of this study was to evaluate the number of bubbles of hydrogen liberation from different polyvinylsiloxane impression materials. Material and Methods: A metallic stainless steel jig containing six receptacles, like trays, was constructed to accommodate the impression materials. The molds were poured immediately, and at 1 hour, 12 hours and 24 hours in order to evaluate the number of bubbles present in each sample. Each sample was made of improved stone (type IV), totaling 48 samples for each polyvinylsiloxane impression material. After setting, the surface of each sample was inspected under a light microscope at 40x magnification and the number of bubbles was recorded. Results were submitted to statistical analysis by ANOVA and Tukey Test (p=.05). Results: ANOVA test showed statistically significant differences among the polyvinylsiloxane impression materials, as determined by the number of bubbles (p<.05). The Tukey test showed statistically significant differences among the three groups (p<.05). Conclusions: Statistical differences were found between addition silicone with regard to the ideal time to wait for the plaster cast, showing that Aquasil results in fewer bubbles in plaster, followed by the President and Simply Perfect samples.

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Farhan, Daniel, Wiebke Lauer, Guido Heydecke, Ghazal Aarabi, and Daniel Reissmann. "Handling of Polyvinylsiloxane Versus Polyether for Implant Impressions." International Journal of Prosthodontics 29, no. 4 (July 2016): 403–5. http://dx.doi.org/10.11607/ijp.4663.

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Stannard, J. G., and M. Sadighi-Nouri. "Retarders for polyvinylsiloxane impression materials: Evaluation and recommendations." Journal of Prosthetic Dentistry 55, no. 1 (January 1986): 7–10. http://dx.doi.org/10.1016/0022-3913(86)90060-0.

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Schenz, Natalie, Vincent Schwarz, Romed Hörmann, and Adriano G. Crismani. "Impression material accuracy for palatal orthodontic miniscrews." Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie 81, no. 6 (September 8, 2020): 427–39. http://dx.doi.org/10.1007/s00056-020-00245-3.

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Abstract Purpose This study investigates the accuracy of abutment transfer with current impression materials and provides a concise overview, including other relevant factors, in order to enable clinicians to make an informed decision about the optimal impression for this treatment procedure. Methods In all, 96 impressions of a cadaver head with two orthodontic miniscrews in place were taken with four common impression materials by two observers and using two methods of application. After pouring with a standard type IV stone and abutment transfer, all models and the upper jaw (which had been separated from the head) were scanned in a standard model scanner (Zirkonzahn® [Zirkohnzahn GmbH, Gais, Italy] S600 ARTI) and evaluated using a computer-aided design (CAD) program (GOM-Inspect [Gesellschaft für optische Messtechnik m.b.H., Braunschweig, Germany]). The deviations were measured at six points per screw and statistically evaluated with SPSS® (IBM, Chicago, IL, USA). Results Optimal values were obtained with biphasic polyvinylsiloxane, while monophasic polyvinylsiloxane, alginate and polyether also resulted in acceptable accuracy. Observer experience showed no effect and the method of application had only a minor effect on accuracy. Conclusions Within the limitations of this study, it seems that all impression materials are suitable for miniscrew abutment transfer, provided that methods of intraoral adaptation of the orthodontic appliance can be employed. If higher accuracy is needed or for clinicians with less experienced, a biphasic polyvinylsiloxane impression with the putty-wash technique should be used as this combination reduces setting time. The most cost-effective version, alginate, can be used if the consequences of greater deviations can be handled. Caution is advised with polyether if undercuts are present.

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van den Driesche, S., J. V. Pimentel, D. Puchberger-Enengl, L. Brandhoff, and M. J. Vellekoop. "Easy-to-realise Polyvinylsiloxane Microfluidic Connectors for PDMS Chips." Procedia Engineering 120 (2015): 675–78. http://dx.doi.org/10.1016/j.proeng.2015.08.720.

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Chark, Davin W., Joseph D. Brunworth, and Jason H. Kim. "An Auricular Bolster Dressing Using Polyvinylsiloxane (PVS) Impression Material." Laryngoscope 119, S1 (2009): S172. http://dx.doi.org/10.1002/lary.20451.

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Lunn, David J., Charlotte E. Boott, Kelly E. Bass, Timothy A. Shuttleworth, Niall G. McCreanor, Sofia Papadouli, and Ian Manners. "Controlled Thiol-Ene Functionalization of Polyferrocenylsilane-block-Polyvinylsiloxane Copolymers." Macromolecular Chemistry and Physics 214, no. 24 (October 17, 2013): 2813–20. http://dx.doi.org/10.1002/macp.201300520.

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HAUBENREICH, JAMES E., and PAUL B. OSBORNE. "Modification of a metal stock tray for a polyvinylsiloxane impression." Journal of the American Dental Association 136, no. 8 (August 2005): 1138–39. http://dx.doi.org/10.14219/jada.archive.2005.0318.

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Buenting, John E., Rodger M. Dalston, and Amelia F. Drake. "The Acoustic Assessment of Nasal Area in Infants." American Journal of Rhinology 8, no. 6 (November 1994): 305–10. http://dx.doi.org/10.2500/105065894781874160.

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The present study was undertaken to determine whether a modification to commercially available acoustic rhinometry (AR) instrumentation might allow equipment designed for use in adults to accurately determine the nasal cavity configuration of infants and children. The standard wave tube was replaced with a version having a narrow (0.312 cm2) internal diameter. After calibration, this device was used to generate nasal area curves for the nasal cavity of a full term infant cadaver. Direct volume measurements and area measurements of polyvinylsiloxane nasal casts of the same specimen were used to evaluate the accuracy of the acoustic method. AR correlated well with nasal cast data (r = 0.88) for total nasal cavity area. The acoustic method underestimated the total area at the nasal valve by only 1.8 mm2 (22.1 mm2 vs. 23.9 mm2) and overestimated choanal area by 10 mm2 (56.9 mm2 vs 46.9 mm2) compared to data derived from polyvinylsiloxane nasal casts. In addition, AR measured total nasal volume to within 5.2% percent of the value obtained by direct measurement. This is the first report that AR can produce useful nasal area information in infants, and it suggests that the device has utility both in airway research and as a nasal patency screening tool in the pediatric population.

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Dissertations / Theses on the topic "Polyvinylsiloxane"

1

Abuasi, Hanan Ali. "Accuracy of polyvinylsiloxane impressions (influence of material and technique)." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358054.

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Koukolová, Anna. "Studium přípravy hybridních organokřemičitých polymerních vláken metodou elektrostatického zvlákňování." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-433575.

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Polyorganosilany spadají do skupiny hybridních materiálů třídy II, které nabízejí nové možnosti materiálových funkcí a jejich vlastností. Ačkoliv byly v této kategorii již některé materiály zkoumány a stejně tak i jejich aplikace, nebyly doposud vlákna na základě polyorganosilanu v mikro a nano rozměru popsány což bylo motivací pro tuto práci. Předkládaná diplomová práce se zabývá podrobným zkoumáním poly(vinylmethyldimethoxysilanu) jako možného prekurzoru pro elektrostatické zvlákňování. Za účelem přípravy polymeru na bázi vinylmethylsilanu byla provedena radikálová polymerace a podmínky reakce byly modifikovány se záměrem změny molekulové hmotnosti získaného polymeru. Stupeň polymerace byl upravován na základě změny koncentrace iniciátoru a byl stanovován dynamickým rozptylem světla v roztoku polymeru a spektroskopickou metodou nukleární magnetické rezonance. Elektrostatické zvlákňování je velkou měrou spojeno s vlastnostmi roztoku a důraz byl proto kladen právě na zjištění těchto vlastností. Na základě experimentů bylo zjištěno, že syntetizovaný polymer je na přípravu vláken vhodný. Nicméně byly získány i fragmenty vláken a to s využitím polymeru v roztoku methanolu. Předpokladem zvlákňování je dostatek propojení mezi polymerními řetězci. Tento přístup byl studován se zapojením sol-gel postupu a bylo zjištěno, že fáze sol-gel procesu je velmi významná s ohledem na tvorbu vláken. Dalším využitým postupem pro získání vláken bylo začlenění dalšího polymeru do směsi jako nosiče a tímto postupem byla získána vlákna s různým průměrem.

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