Relevant bibliographies by topics / Dental impression materials Elastomers

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Academic literature on the topic 'Dental impression materials Elastomers'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Dental impression materials Elastomers"

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Carlo, Hugo Lemes, Rodrigo Borges Fonseca, Carlos José Soares, Américo Bortolazzo Correr, Lourenço Correr-Sobrinho, and Mário Alexandre Coelho Sinhoreti. "Inorganic particle analysis of dental impression elastomers." Brazilian Dental Journal 21, no. 6 (2010): 520–27. http://dx.doi.org/10.1590/s0103-64402010000600007.

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The aim of this study was to determine quantitatively and qualitatively the inorganic particle fraction of commercially available dental elastomers. The inorganic volumetric fraction of two addition silicones (Reprosil Putty/Fluid and Flexitime Easy Putty/Fluid), three condensation silicones (Clonage Putty/Fluid, Optosil Confort/Xantopren VL and Silon APS Putty/Fluid), one polyether (Impregum Soft Light Body) and one polysulfide (Permlastic Light Body) was accessed by weighing a previously determined mass of each material in water before and after burning samples at 600ºC, during 3 h. Unsettled material samples were soaked in acetone and chloroform for removal of tthe organic portion. The remaining filler particles were sputter-coated with gold evaluation of their morphology and size, under scanning electron microscopy (SEM). Flexitime Easy Putty was the material with the highest results for volumetric particle fraction, while Impregum Soft had the lowest values. Silon 2 APS Fluid presented the lowest mean filler size values, while Clonage Putty had the highest values. SEM micrographs of the inorganic particles showed several morphologies - lathe-cut, spherical, spherical-like, sticks, and sticks mixed to lathe-cut powder. The results of this study revealed differences in particle characteristics among the elastometic materials that could lead to different results when testing mechanical properties.
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Guiraldo, Ricardo Danil, Eric Yudi Harada, Sandrine Bittencourt Berger, Flaviana Alves Dias, Danielle Gregorio, Lucia Gloria Diana Aguilar Pizzurno, Nayra Kawana Turini, and Murilo Baena Lopes. "Influence of expiration date on detail reproduction of dental elastomers." Research, Society and Development 10, no. 11 (September 2, 2021): e306101118837. http://dx.doi.org/10.33448/rsd-v10i11.18837.

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Elastomers are synthetic rubber materials formed by polymers, which are joined by a small number of cross-links that form a three-dimensional network. The aim of the current study was to compare the surface detail reproduction of polyvinyl siloxane and polyether-based elastomeric impression materials (2 years after their expiration date) to the ones that have not exceeded this period-of-time. Four groups comprising 5 samples, each (n = 5), were divided based on material (polyvinyl siloxane – Express and polyether – Impregum Soft) and expiration date (expired, or not). The manipulated material was placed on a tray in a way to fully cover its inner part. Later on, it was placed on a metal matrix presenting 20-, 50- and 75-μm lines. Molds were removed after polymerization and surface detail reproduction was measured in comparator microscope (Stereozoom Microscope), along the 20 μm line (25 mm in length), at 4x-magnification, in compliance with ISO 4823. Surface detail reproduction values were subjected to descriptive analysis - results were expressed in percentage (%). All groups presented 100% of surface detail reproduction, regardless of impression material or expiration date. Surface detail reproduction of the investigated materials was not influenced by the evaluated elastomers’ expiration date.
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Zulkarnain, M., and Sarah Devina. "Pengaruh Penyemprotan Daun Sirih dan sodium Hipoklorit Pada Cetakan Elastomer Terhadap Perubahan Dimensi." Jurnal Material Kedokteran Gigi 5, no. 2 (September 1, 2016): 36. http://dx.doi.org/10.32793/jmkg.v5i2.252.

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Elastomer is often used to make an impression. In prosthodontics, impression material that have been exposed to infected saliva pose a main source of cross contamination in dental office and laboratories, therefore desinfection of impression is recommended by American Dental Association (ADA) to prevent possible transmission of infectious diseases. Piper betle L. 25% and sodium hypochlorite 0,5% can both be used as desinfection agent by spraying the impression materials. But some desinfection process can effect the dimensional accuracy of the impressions materials especially the hidrophilic materials. The aim of this study was to determine the influence of spray desinfection with piper betle L. 25% and sodium hypochlorite0,5% on dimensional accuracy of cast made by elastomeric impression materials. Type of this research was a laboratory experiment. The samples of this research were the cast made by elastomeric impression materials, two abutment preparations in shape with diameter (buco lingual)6.33 mm, height (occluso gingival) 8.02 mmand distance between the centers of the abutments 28.25 mm and total samples were 30 for 3 groups. The cast dimension was measured using digital caliper and dimensional accuracy test was analyzed with T-Independent test. The result showed that there was a statisticallyinfluence of spray desinfection with piper betle L. 25% and sodium hypochlorite0,5% on dimensional accuracy of cast made by elastomeric impression materials(p<0.05) and the percentage of the dimensional change is in normal range recommended by ADA 19 (<0,5%). Therefore, spray desinfection with piper betle L. 25% can be used in elastomeric impression materials.
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Cervino, Gabriele, Luca Fiorillo, Alan Herford, Luigi Laino, Giuseppe Troiano, Giulia Amoroso, Salvatore Crimi, et al. "Alginate Materials and Dental Impression Technique: A Current State of the Art and Application to Dental Practice." Marine Drugs 17, no. 1 (December 29, 2018): 18. http://dx.doi.org/10.3390/md17010018.

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Hydrocolloids were the first elastic materials to be used in the dental field. Elastic impression materials include reversible (agar-agar), irreversible (alginate) hydrocolloids and synthetic elastomers (polysulfides, polyethers, silicones). They reproduce an imprint faithfully, providing details of a high definition despite the presence of undercuts. With the removal of the impression, being particularly rich in water, the imprints can deform but later adapt to the original shape due to the elastic properties they possess. The advantages of using alginate include the low cost, a better tolerability on the part of the patient, the ease of manipulation, the short time needed for execution, the instrumentation and the very simple execution technique and possibility of detecting a detailed impression (even in the presence of undercuts) in a single step. A comprehensive review of the current literature was conducted according to the PRISMA guidelines by accessing the NCBI PubMed database. Authors conducted a search of articles in written in English published from 2008 to 2018. All the relevant studies were included in the search with respect to the characteristics and evolution of new marine derived materials. Much progress has been made in the search for new marine derived materials. Conventional impression materials are different, and especially with the advent of digital technology, they have been suffering from a decline in research attention over the last few years. However, this type of impression material, alginates (derived from marine algae), have the advantage of being among the most used in the dental medical field.
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Kollefrath, Ralf, Marcel Savary, and Jörg Schwela. "An Evaluation of the Fit of Metal-Ceramic Restorations Made with an Autoclaved Silicone-Based Impression Material." Journal of Contemporary Dental Practice 11, no. 4 (2010): 63–70. http://dx.doi.org/10.5005/jcdp-11-4-63.

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Abstract Aim To demonstrate the clinical feasibility of autoclaving certain silicone impression materials in order to avoid potential cross-contamination during handling, transport, and subsequent processing. Background Semicritical devices are recommended to be treated at least with high-level disinfectants or actually steam sterilized at 134°C. To date dental impressions have been disinfected rather than sterilized, so the question remains should they be sterilized before being sent to the dental laboratory? Case Descriptions Two identical impressions per case were made of metal-ceramic crown and fixed partial denture preparations on the same patient using addition type polyvinyl siloxane (PVS) impression materials (AFFINIS, R Coltene/ Whaledent AG, 9450 Altstatten, Switzerland) in different trays. The first impression (IMPx1) was cleaned and treated with an intermediate-level disinfectant (FD 322.Fast Disinfection Spray, Durr Dental, 74321 Bietigheim-Bissingen, Germany). The second impression (IMPx2) was cleaned, treated with an intermediate-level disinfectant as with IMPx1, subjected to a computer tomography (CT) scan with a dimensional resolution of ±10 μm, steam sterilized, and then subjected to a second CT scan. The dimensional changes of the second impression after steam sterilization were calculated by comparing the overlay of the two CT scans and expressed by color coding of the impression graphics. After the second scan, the impression was sent to a dental laboratory to fabricate a metal-ceramic crown or metal-ceramic fixed partial denture restoration to the one produced from the first impression (IMPx1) subjected only to disinfection. This process was repeated for four clinical cases. Conclusion Impressions made with AFFINIS® silicone impression materials in a rigid reinforced polycarbonate impression tray or in a metal dual-arch tray can be autoclaved. The overall dimensional stability of the impressions and the quality of single crowns and small fixed partial dentures made using IMPx2 was not compromised. The maximum dimensional differences at the preparations of the nonautoclaved and the autoclaved impressions were found to be within acceptable limits of about 50–100 ìm. Clinical Significance Steam sterilization of AFFINIS® impressions is possible without adversely affecting dimensional change. In addition, clinicians can clearly indicate to the dental practice and laboratory personnel that sterilization of the impressions has been performed, cross-contamination is unlikely, and the impressions present no apparent health hazard during transport and subsequent processing. Disclosure Dr. Kollefrath is head of Research and Development, Elastomers at Coltène/ Whaledent AG, Altstätten, Switzerland, the manufacturer of the impression material evaluated in this report. Citation Kollefrath R, Savary M, Schwela J. An Evaluation of the Fit of Metal-Ceramic Restorations Made with an Autoclaved Silicone- Based Impression Material. J Contemp Dent Pract [Internet]. 2010 July; 11(4):063-070. Available from: http://www.thejcdp.com/journal/ view/volume11-issue4-kollefrath
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Andreescu, Claudia Florina, Oana Botoaca, Horia Mihail Barbu, Doina Lucia Ghergic, Anamaria Bechir, and Anne Marie Rauten. "Deficiencies in Silicone Impression for Crowns and Bridges." Revista de Chimie 68, no. 10 (November 15, 2017): 2317–19. http://dx.doi.org/10.37358/rc.17.10.5876.

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There are many steps in fabrication of dental crowns and bridges at which an error can occur, and a technician can only fabricate a quality restoration if the impression itself is of adequate quality. All dental practitioners should have the ability to evaluate the quality of dental impression before sending to the laboratory. Elastomeric silicones (polysiloxane) are the most utilised impression materials in dental practice. The present study deal with the deficiencies of silicones dental impressions sent to commercial dental laboratories for fabrication of single crowns and bridges.
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Braden, M., and A. T. Inglis. "Visco-elastic properties of dental elastomeric impression materials." Biomaterials 7, no. 1 (January 1986): 45–48. http://dx.doi.org/10.1016/0142-9612(86)90088-8.

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H. Mohammed, Dhuha, Abdalbseet A. Fatalla, and Ghassak H. Jani. "Comparison of Some Mechanical and Physical Properties of three Types of Impression Materials with Different Dental Implant Angulations." Biomedical and Pharmacology Journal 11, no. 3 (August 29, 2018): 1359–68. http://dx.doi.org/10.13005/bpj/1499.

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Choosing an appropriate impression material is a challenge for many dentists, yet an essential component to provide an excellent clinical outcome and improve productivity and profit. The purpose of present study was to compare wettability, tear strength and dimensional accuracy of three elastomeric impression materials, with the same consistencies (light-body). Three commercially available light body consistency and regular set 3M ESPE Express polyvinylsiloxane (PVS), 3M ESPE Permadyne polyether (PE), and Identium (ID), impression materials were comparedTear strength test, contact angle test and linear dimensional accuracy were evaluated for three elastic impression material. Among the three experimental groups PE impression material exhibited the higher mean values of tear strength, followed by ID group then PVS which showed the lowest mean value. For wettability test, Polyether group exhibited the lowest mean values of contact angle, followed by mean values of contact angle of ID group, while the PVS group showed the highest contact angle. There was a significant difference in the linear distance measurements between the two parallel impression coping/analogue assembly of the working models obtained by using (Identium, 3M ESPE ExpressPVS , 3M ESPE Permadyne polyether) the polyether impression materials provide higher tear strengths and lower wettability than elastomer impression materials and Identium material have acceptable tear strengths and wettability. All three experimental impression materials were distorted in both conditions (angled and parallel implant situations)
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Haralur, Satheesh B., Majed S. Toman, Abdullah A. Al-Shahrani, and Abdullah A. Al-Qarni. "Dimensional Accuracy of Multiple Pour Cast from Different Elastomer Impression Techniques." International Journal of Prosthodontics and Restorative Dentistry 6, no. 3 (2016): 51–56. http://dx.doi.org/10.5005/jp-journals-10019-1155.

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ABSTRACT Context The elastomeric impression material is the most widely used impression material in contemporary dental practice; their accuracy is critical for the outcome of indirect restorations. The accurate duplicate cast obtained from single impression reduces the professional clinical time, patient inconvenience, and extra material cost. Aim To compare the accuracy of the cast obtained from various impression methods utilizing elastomer impression materials. Materials and methods The stainless steel working cast model assembly consisting of two abutments and one pontic area was fabricated. Two sets of six each custom aluminum trays were fabricated, with 5 mm spacer and 2 mm space. The impression methods evaluated in the study were additional silicone putty reline (two step), heavy-light body (one step), monophase (one step), and polyether (one step). Type IV gypsum casts were poured at intervals of 1, 12, 24, and 48 hours. The resultant cast was measured with a traveling microscope for comparative dimensional accuracy. The data obtained were subjected to analysis of variance test at significance level <0.05. Results The die obtained from putty reline two-step impression techniques had the percentage of variation for the height -0.36 to -0.97% with 0.40 to 0.90% increase in diameter. One-step heavy-light body impression dies recorded the increased width by 0.50 to 0.80% and height reduced by - 0.73 to -1.21%. The resultant dies from additional silicone monophase impressions had a percentage of variation for width 1.20% and height by-1.34%. The similar value for width and height for polyether was -1.46% and -1.30% respectively. Conclusion Putty reline technique dies had better dimensional accuracy after repeated pour followed by dies from heavy-light body additional silicone impression. Key message The multiple pour cast from putty reline elastomeric impressions is clinically acceptable, while cast from polyether was smaller in dimension. How to cite this article Haralur SB, Toman MS, Al-Shahrani AA, Al-Qarni AA. Dimensional Accuracy of Multiple Pour Cast from Different Elastomer Impression Techniques. Int J Prosthodont Restor Dent 2016;6(3):51-56.
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Mehta, Deepak, Rohit Shetty, and Ganesh R. Bhandari. "Vinyl Polysiloxane Ether: A Breakthrough in Elastomeric Impression Material." World Journal of Dentistry 5, no. 2 (2014): 134–37. http://dx.doi.org/10.5005/jp-journals-10015-1274.

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ABSTRACT A meticulous impression is paramount for a precision fit of indirect restoration. Unfortunately, for many clinicians, making an impression for fixed prostheses is one of the challenging aspects in restorative dentistry. Advances in elastomeric chemistries have given birth to a new generation of impression materials: a combination of a polyvinyl and a polyether impression material, called vinyl siloxane ether. The purpose of this article is to explore the new impression material which is effective and efficient to obtain predictable, accurate, high quality impressions in dental practice. How to cite this article Shetty RM, Bhandari GR, Mehta D. Vinyl Polysiloxane Ether: A Breakthrough in Elastomeric Impression Material. World J Dent 2014;5(2):134-137.
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Dissertations / Theses on the topic "Dental impression materials Elastomers"

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Lawson, Nathaniel C. "Mechanical properties of dental impression materials." Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2008r/lawson.pdf.

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Shah, Amit. "Surface reproducibility of impression materials." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2007. http://www.mhsl.uab.edu/dt/2007m/shah.pdf.

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Pamenius, Madeleine Jansson. "Rubber impression materials, a mechanical approach an investigation of material properties and their application in computer simulation of dimensional stability /." Stockholm : Division of Dental Materials and Technology, Dept. of Clinical Oral Sciences, School of Dentistry, Karolinska Institutet, 1994. http://catalog.hathitrust.org/api/volumes/oclc/30989203.html.

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Osio, Mary A. "The effect of storage time on dimensional accuracy of elastomeric impression materials." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_1324_1259228236.

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Several factors play a role in stability of impressions made from elastomeric impression materials. These include
polymerization shrinkage, loss of by-products during condensation, thermal contraction from oral temperature to room temperature, imbibition when exposed to water, disinfectant or high humidity and incomplete recovery from deformation due to viscoelastic behavior. An ideal impression material should be dimensionally stable over time to allow for pour at the convenience of the operator. Several studies evaluated the dimensional accuracy of elastomeric impression materials based on various factors including effects of repeat pour, temperature, humidity, disinfectants, impression techniques, and filler loading amongst others. Most of the previous studies did not use the standardized method described by the ADA specification for elastomeric impression materials..."

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Monteiro, Jaiane Bandoli. "Avaliação da alteração dimensional de quatro siliconas por condensação através da medição tridimensional por coordenadas." Universidade Federal de Juiz de Fora, 2015. https://repositorio.ufjf.br/jspui/handle/ufjf/87.

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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
O objetivo foi avaliar a alteração dimensional dos moldes de silicona por condensação imediatamente, 30min, 1h e 7 dias após a moldagem, com o auxílio da máquina de medição tridimensional por coordenadas. Os grupos foram divididos em: G1: Speedex Putty/Speedex Light Body (Coltene/Vigodent AS Indústria e Comércio), G2: Optosil P Plus/Xantopren L Blue (Heraeus Kulzer GmbH), G3: Zetaplus Putty/Oranwash L (Zhermack SpA) e G4: Precise SX (Dentsply Indústria e Comércio Ltda). Para a obtenção das 80 medições dos 4 materiais (n=20), foi usado um dispositivo composto por uma moldeira perfurada e uma outra parte com 3 edentações pré-estabelecidas. Para a avaliação dimensional, a máquina Crysta-Plus M 574 (Mitutoyo) realizou cada medida 3 vezes nos tempos estabelecidos e obteve-se a média aritmética. A média final das 4 distâncias I, II, III e IV do dispositivo edentado foi novamente aplicada. A análise estatística foi realizada com o teste de Kolmogorov-Smirnov que rejeitou a hipótese nula de distribuição assimétrica. Posteriormente, foi feita a ANOVA para comparar os 4 materiais simultaneamente e o teste paramétrico t de Student para comparar os materiais 2 a 2. O nível de significância global foi de p≤0,05. A maior contração linear foi observada na Speedex, mas não foi significante (p=0,08). A Zetaplus Putty/Oranwash L parece ser a mais estável (p=0,99), mas não foi significante. Não houve diferença estatisticamente significante entre nenhuma silicona por condensação quando comparadas simultaneamente nos 4 tempos ou quando comparadas 2 a 2, à exceção, Precise SX e a Speedex (p=0,05) no tempo T3. Todas as siliconas por condensação testadas apresentam alteração dimensional clinicamente aceitável e podem ser vazadas imediatamente, 30min, 1h e 7 dias após a moldagem.
The purpose was to evaluate the dimensional changes of condensation silicone impressions by immediately, 30min, 1h and 7 days after impression, with the help of threedimensional measuring coordinate machine. The groups were divided in: G1: Speedex Putty/Speedex Light Body (Coltène/Vigodent S/A Ind and Com), G2: Optosil P Plus/Xantopren L Blue (Heraeus Kulzer GmbH), G3: Zetaplus Putty/Oranwash L (Zhermack SpA) and G4: Precise SX (Dentsply Ind and Com Ltda). To obtain 80 measurements of 4 material (n=20) was used a device consisting of a perforated tray and one another part with 3 pre-established indentations. For dimensional evaluation, the Crysta-Plus M574 machine (Mitutoyo) held each measurement 3 times at the established times and obtained the arithmetic mean. The final average of the 4 distances of I, II, III and IV the edentulous device was again applied. Statistical analysis was performed using the Kolmogorov-Smirnov test to reject the null hypothesis of asymmetric distribution. Subsequently, ANOVA was performed to compare the four materials simultaneously and Student's t parametric test to compare the 2 by 2 materials. The overall significance level of p≤0,05. The higher linear contraction was observed in Speedex, but was not significant (p=0,08). The Zetaplus Putty/Oranwash L seems to be more stable (p=0,99) but was not significant. There was no significant difference between any silicone condensation compared simultaneously in 4 times or compared 2 by 2, except, Precise SX and Speedex (p=0,05) in T3 time. All tested condensation silicones exhibit clinically acceptable dimensional change and can be leaked immediately, 30min, 1h and 7 days after impression.
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Carlo, Hugo Lemes. "Influencia do conteudo volumetrico das particulas de cargas nas propriedades mecanicas de diferentes materiais de moldagem." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288141.

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Orientadores: Mario Alexandre Coelho Sinhoreti, Carlos Jose Soares
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Baseado no entendimento incompleto de como o conteúdo de partículas de carga influencia nas propriedades mecânicas dos materiais de moldagem este estudo avaliou quantitativa e qualitativamente o conteúdo de partículas de carga inorgânicas presente em cinco marcas comerciais de alginatos (Jeltrate; Jeltrate Plus, Jeltrate Chromatic Ortho, Hydrogum e Ezact Krom) e nove marcas comerciais de siliconas de adição e/ou condensação nas consistências massa e/ou fluida (Clonage, Elite HD+ Light Body, Express Light Body, Flexitime, Optosil P Confort/Xantopren VL Plus, Oranwash L, Reprosil A+, Silon 2 APS e Virtual Extra Light Body). Foram realizados testes para determinar recuperação elástica e deformação sob compressão dos alginatos e dos elastômeros e estabelecer, dessa forma, uma correlação entre os resultados para partículas de carga e os testes mecânicos. O conteúdo volumétrico das partículas de carga foi determinado pesando-se as amostras submersas em água antes e após a queima das mesmas durante 3h a 450°C (alginatos) e a 600°C (siliconas). Quantidades determinadas de materiais não polimerizados foram lavadas em acetona e clorofórmio e recobertas com ouro para avaliação da morfologia e tamanho das partículas em M.E.V. A composição foi determinada por EDX. A recuperação elástica e a deformação sob compressão foram determinadas de acordo as especificações ? 1563 (alginatos) e 4823 (elastômeros) da ISO. O alginatos Jeltrate e Jeltrate Plus apresentaram os maiores valores médios para quantidade volumétrica de partículas de carga (%) enquanto o material Hydrogum apresentou os menores valores. A silicone de adição Flexitime Easy Putty apresentou os maiores valores de quantidade volumétrica de partículas, enquanto que a silicone de condensação Xantopren VL Plus apresentou os menores. As partículas de carga dos alginatos apresentaram-se, de forma geral, como objetos esféricos e com perfurações. O material Hydrogum apresentou forma de bastões cilíndricos e perfurados. As siliconas apresentaram morfologias variadas ¿ partículas trituradas, esféricas, esferóides, bastões cilíndricos perfurados e bastões misturados a partículas usinadas. O alginato Ezact Krom apresentou os maiores valores médios de tamanho de partícula, enquanto que o alginato Hydrogum as menores. A silicone de condensação Clonage massa apresentou os maiores valores médios de tamanho de partícula, enquanto a silicone de adição Elite HD os menores. A análise da composição das partículas apresentou o silício como o elemento em maior quantidade. Com relação aos resultados de recuperação elástica, o alginato Ezact Krom e as siliconas Reprosil A+ massa e Flexitime fluida apresentaram os maiores valores de recuperação elástica, enquanto o alginato Jeltrate Plus e as siliconas Optosil P Confort e Clonage fluida apresentaram os menores. Os resultados de deformação sob compressão foram maiores para o alginato Jeltrate Plus e para as siliconas Silon 2 APS massa e fluida. Os menores resultados foram apresentados pelo alginato Ezact Krom e as siliconas Reprosil A+ massa e Xantopren VL Plus. Todos os materiais estão em conformidade com a norma ISO ?1563, mas nem todos estão em relação à norma ?4823
Abstract: Based on the incomplete understanding on how filler features influence the properties of elastomeric impression materials, the purpose of this study was to determine the inorganic filler fraction and size of five commercially available alginates (Jeltrate; Jeltrate Plus, Jeltrate Chromatic Ortho, Hydrogum e Ezact Krom) and nine addition/condensation silicones using the putty/light consistence (Clonage, Elite HD+ Light Body, Express Light Body, Flexitime, Optosil P Confort/Xantopren VL Plus, Oranwash L, Reprosil A+, Silon 2 APS e Virtual Extra Light Body). A SEM/EDX analysis was done to qualitatively characterize the materials. Soon afterwards elastic recovery and strain in compression of the alginates and some the silicones was carried. The inorganic particles volumetric fractions were accessed by weighing a previously determined mass of each material in water before and after burning samples for 3 hours at 450ºC (alginates) and 600ºC (silicones). Unsettled materials were soaked in acetone and chloroform and sputter-coated with gold for SEM evaluation of fillers¿ morphology and size. The filler composition was determined by EDX. Elastic recovery and strain in compression tests were conducted according to ISO specification number 1563 and 4823. Jeltrate and Jeltrate Plus presented the highest mean values of percentage content of inorganic particles in volume, while Jeltrate Chromatic Ortho presented the lowest values. Flexitime Easy Putty was the silicone with the highest mean value, while Xantopren VL Plus had the lowest value. The alginate fillers presented a circular appearance with helical form and various perforations. Hydrogum fillers looked like cylindrical, perforated sticks. SEM pictures of the silicone inorganic particles showed numerous morphologies ¿ lathe-cut, spherical, spherical-like, sticks, and sticks mixed to lathe-cut powder. Ezact Krom was the alginate with the highest values for diameter size, while Hydrogum had the lowest. Clonage Putty showed the highest values, while Elite HD+ Light Body presented the lowest values. The component in higher concentration in the materials is silicon. The alginate Ezact Krom, and the addition cure silicones Reprosil A+ putty and Flexitime Correct Flow had the highest mean values of elastic recovery, while the alginate Jeltrate Plus and the condensation cured silicones Optosil P Confort and Clonage Putty presented the lowest values. Strain in compression test showed the alginate Jeltrate Plus and the condensation cured silicones Silon 2APS Putty and Fluid as the materials with the highest values. The alginate Ezact Krom and the silicones Reprosil A+ Putty and Xantopren VL Plus had lowest values. All materials are in conformity with the requirements of ISO specification number 1563, but not all materials are in conformity with the requirements of ISO specification number 4823
Doutorado
Materiais Dentarios
Doutor em Materiais Dentários
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Cid, Galano Marcos. "Linear expansion of dental stone after its final set and beyond two hours." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2935.

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Thesis (M.S.)--West Virginia University, 2003.
Title from document title page. Document formatted into pages; contains viii, 43 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 41-42).
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Zeiaei-Nafchi, Saeid. "Dimensional changes of poysulfide [sic] impression materials over time." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1300.

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Thesis (M.S.)--West Virginia University, 2000.
Title from document title page. Document formatted into pages; contains vii, 47 p. : ill. (some col.) Vita. Includes abstract. Includes bibliographical references (p. 41-46).
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Muller, Susan Sanette. "The effect of temperature on the linear dimensional stability of elastomers." University of the Western Cape, 2012. http://hdl.handle.net/11394/4624.

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Masters of Science
Sometimes, dental impressions need to be transported to distant laboratories. It has been reported that the temperature in a vehicle can reach up to 66C when the outdoor temperature is 38C. These temperatures may be reached during South African summers. The objective of this in vitro study was to investigate the effect of temperature and time on the dimensional stability of two elastomeric impression materials. Methodology: Specimens consisted of impressions made of an ISO-specified test-block featuring a pattern of grooves. Materials used were polyether (Impregum Penta) and polyvinylsiloxane (Affinis Precious regular body). Using an SLR camera and standardized technique, the specimens were photographed at 2 different temperatures (21°C and 66°C) and 3 time intervals (30min, 8hrs and 14 days). This resulted in a total of 12 groups (n=10) to be compared. Digital images of the impressions were calibrated and measured using digital analyzing software. These distances were used to evaluate the mean % dimensional change (%DC) for each group. VEPAC module of Statistica 10 was used for the statistical analysis. To analyze exactly where the differences lied, a Fisher LSD correction was applied to correct for multiple pair wise comparisons. Results: Comparing polyether with silicone, there was no difference in the mean %DC for specimens kept at 21°C for 8hrs (polyether=0.364; silicone=0.237). Neither was there a difference between polyether and silicone when heated to 66°C, cooled off, and measured after 8hrs (polyether=0.306; silicone=0.297) or after 14 days (polyether=-0.272; silicone=-0.093). For both polyether and silicone, the mean %DC of the groups exposed to 66°C, cooled off and measured after 8hrs (polyether=0.306; silicone=0.297) differed significantly when compared to the group measured after 14 days (polyether=-0.2723; silicone=-0.092) (P<0.0001 and P=0.0029 resp). For both polyether and silicone, the mean %DC of the groups exposed to 66°C, cooled off and measured after 8hrs (polyether=0.306; silicone=0.297) did not differ when compared to the 21°C (polyether=0.364; silicone=0.237). Conclusions: Within limitations of this study, both materials were heat-sensitive. It is recommended that materials return to 21°C before casting. Despite statistical differences, all results were within ISO specifications of maximum 1.5%DC.
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Walmsley, P. G. S. "Surface characteristics of vinyl polysiloxane impression materials /." Title page, summary and contents only, 1991. http://web4.library.adelaide.edu.au/theses/09DM/09dmw216.pdf.

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Books on the topic "Dental impression materials Elastomers"

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DiGiacomo, Ellen G. Alginate impression and diagnostic study model techniques. Chicago, IL: American Dental Assistants Association, 1997.

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D, Bagby Michael, ed. Clinical aspects of dental materials: Theory, practice, and cases. 4th ed. Philadelphia: Wolters Kluwer/Lippincott Williams & Wilkins Health, 2011.

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Gladwin, Marcia A. Clinical aspects of dental materials: Theory, practice, and cases. 3rd ed. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins, 2009.

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Gladwin, Marcia A. Clinical aspects of dental materials: Theory, practice, and cases. 3rd ed. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins, 2009.

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Taylor, Ross L. Laboratory techniques for the Brånemark System. Chicago: Quintessence Pub. Co., 1990.

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Zardiackas, L., T. Dellinger, and M. Livingston. Dental Materials, An Issue of Dental Clinics (The Clinics: Dentistry). Saunders, 2007.

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Learning, Thomson Delmar. Delmar's Dental Assisting Video 5-Laboratory Impression, Materials & Techniques (Delmar's Dental Assisting Video). Delmar Learning, 1999.

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Clinical Aspects of Dental Materials: Theory, Practice, and Cases (Clinical Aspects of Dental Materials). 3rd ed. Lippincott Williams & Wilkins, 2008.

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Clinical Aspects of Dental Materials. Lippincott Williams & Wilkins, 2000.

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Bagby, Michael, and Marcia A Gladwin RDH Ed.D. Clinical Aspects of Dental Materials: Theory, Practice, and Cases. Lippincott Williams and Wilkins, 2017.

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Book chapters on the topic "Dental impression materials Elastomers"

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Manappallil, John. "Elastomeric Impression Materials." In Basic Dental Materials, 191. Jaypee Brothers Medical Publishers (P) Ltd., 2010. http://dx.doi.org/10.5005/jp/books/11146_13.

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Manappallil, John. "Elastomeric Impression Materials." In Basic Dental Materials, 277. Jaypee Brothers Medical Publishers (P) Ltd., 2016. http://dx.doi.org/10.5005/jp/books/12669_17.

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Qadeer, BDS, MSD, Sarah. "The Limitations of Traditional Non-Digital Occlusal Indicators When Compared to the T-Scan Computerized Occlusal Analysis Technology." In Handbook of Research on Computerized Occlusal Analysis Technology Applications in Dental Medicine, 36–64. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-6587-3.ch002.

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The traditional occlusal indicators used in dental practice are articulation papers, shim-stock foils, elastomeric impression materials, and occlusal wax strips. These static dental materials have been widely believed to have occlusal force descriptive capability. However, modern material studies are challenging the widespread belief that occlusal indicator materials can measure differing occlusal force levels. This chapter evaluates the force reporting limitations of these static occlusal indicators and discusses how clinicians subjectively interpret their appearance characteristics to determine differing occlusal force levels. This chapter then compares these non-digital occlusal indicators to computerized occlusal analysis technology that records and displays precise, quantifiable, relative occlusal force variances and occlusal contact timing sequences. This digital data aids the clinician in making a more accurate occlusal analysis and can guide the clinician in the correction of occlusal contact force and timing abnormalities, thereby eliminating the subjectivity that is inherent in traditional occlusal indicator use.
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Qadeer, BDS, MSD, Sarah. "The Limitations of Traditional Non-Digital Occlusal Indicators When Compared to the T-Scan Computerized Occlusal Analysis Technology." In Medical Imaging, 1528–55. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0571-6.ch065.

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The traditional occlusal indicators used in dental practice are articulation papers, shim-stock foils, elastomeric impression materials, and occlusal wax strips. These static dental materials have been widely believed to have occlusal force descriptive capability. However, modern material studies are challenging the widespread belief that occlusal indicator materials can measure differing occlusal force levels. This chapter evaluates the force reporting limitations of these static occlusal indicators and discusses how clinicians subjectively interpret their appearance characteristics to determine differing occlusal force levels. This chapter then compares these non-digital occlusal indicators to computerized occlusal analysis technology that records and displays precise, quantifiable, relative occlusal force variances and occlusal contact timing sequences. This digital data aids the clinician in making a more accurate occlusal analysis and can guide the clinician in the correction of occlusal contact force and timing abnormalities, thereby eliminating the subjectivity that is inherent in traditional occlusal indicator use.
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Qadeer, BDS, MSD, Sarah, and Lertrit Sarinnaphakorn, DDS. "Comparing the Force and Timing Limitations of Traditional Non-Digital Occlusal Indicators to the T-Scan Computerized Occlusal Analysis Technology." In Advances in Medical Technologies and Clinical Practice, 55–99. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9254-9.ch002.

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The traditional occlusal indicators used in dental practice are articulation papers, Shim-stock foils, elastomeric impression materials, and occlusal wax strips. These static dental materials have been widely believed to have occlusal force descriptive capability. However, modern material studies are challenging the widespread belief that occlusal indicator materials can measure differing occlusal force levels. This chapter evaluates the force reporting limitations of these static occlusal indicators, and discusses how clinicians subjectively interpret their appearance characteristics to determine differing occlusal force levels. This chapter then compares these non-digital occlusal indicators to the T-Scan computerized occlusal analysis technology, that records and displays precise, quantifiable, relative occlusal force variances, and occlusal contact timing sequences. This digital data aids the clinician in making a more accurate occlusal analysis, and can guide the clinician in the correction of occlusal contact force and timing abnormalities, thereby eliminating the subjectivity that is inherent with traditional occlusal indicator use. This chapter further details the diagnostic occlusal capabilities of the T-Scan's digital force and timing data, by presenting two separate studies that compared measured closure and excursive occlusal contact force and timing parameters in orthodontic and non-orthodontic young adults. A commentary is included regarding the clinical pitfalls of using maximally invasive, subjective interpretation to choose occlusal contacts for treatment instead of employing minimally invasive, computer-guided occlusal contact selection. This last section clearly illustrates to the reader that both patients and dentists will markedly benefit from the implementation of occlusal measurement technology.
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Alla, Rama. "Impression Materials." In Dental Materials Science, 158. Jaypee Brothers Medical Publishers (P) Ltd., 2013. http://dx.doi.org/10.5005/jp/books/12018_7.

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Solomon, Charlene S. "Flexible Impression Materials." In Dental Biomaterials, 371–400. WORLD SCIENTIFIC, 2018. http://dx.doi.org/10.1142/9789813225688_0013.

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Soratur, SH. "Impression Materials." In Viva in Dental Materials, 41. Jaypee Brothers Medical Publishers (P) Ltd., 2004. http://dx.doi.org/10.5005/jp/books/11005_10.

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Manappallil, John. "Rigid Impression Materials." In Basic Dental Materials, 159. Jaypee Brothers Medical Publishers (P) Ltd., 2010. http://dx.doi.org/10.5005/jp/books/11146_11.

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Manappallil, John. "Rigid Impression Materials—Impression Compound and ZOE Paste." In Basic Dental Materials, 241. Jaypee Brothers Medical Publishers (P) Ltd., 2016. http://dx.doi.org/10.5005/jp/books/12669_15.

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Conference papers on the topic "Dental impression materials Elastomers"

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Jeremic Knezevic, Milica, Aleksandar Knezevic, Daniela Djurovic Koprivica, Aleksandra Maletin, Bojana Milekic, and Tatjana Puskar. "Analysis of elastic properties of dental impression materials." In RAD Conference. RAD Centre, 2021. http://dx.doi.org/10.21175/rad.abstr.book.2021.4.1.

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Park, W. S., K. D. Kim, H. K. Shin, and S. H. Lee. "Reduction of Metal Artifact in Three-Dimensional Computed Tomography (3D CT) with Dental Impression Materials." In 2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2007. http://dx.doi.org/10.1109/iembs.2007.4353084.

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