scholarly journals Effect of the disinfection technique on the linear dimensional stability of dental impression materials

2004 ◽  
Vol 12 (3) ◽  
pp. 244-249 ◽  
Author(s):  
Sávio Marcelo Leite Moreira da Silva ◽  
Milton Carlos Gonçalves Salvador
Keyword(s):  
Stainless Steel ◽  
Dimensional Stability ◽  
Three Dimensional ◽  
Control Group ◽  
Running Water ◽  
Impression Materials ◽  
Dimensional Measurements ◽  
Disinfectant Solution ◽  
Dental Impression ◽  
Mixing Method

The purpose of this study was to evaluate the dimensional stability of heavy and light bodied condensation silicones after immersion in disinfectant solution for 10 or 20 minutes. The impression materials were Optosil Comfort and Xantopren VL Plus and the disinfectant solutions were 1% sodium hypochlorite and 2% glutaraldehyde. Impressions were made on a perforated stainless steel tray, according to the American Dental Association specification No. 19, adding up to a total of 50 samples. The double mixing method (one time, two viscosities) was used. Impressions were removed from the roulette block after 7 minutes to ensure complete curing and then immersed in the solutions. Impressions not submitted to treatment composed the control group. After these steps, the impressions were removed from the solution, rinsed in running water and air-dried. Three-dimensional measurements were calculated using an optic microscope graduated at 0.001 mm. The two-way ANOVA indicated no differences (p>0.05) for any combination between variables. The results showed that the solution studied can be safely used to disinfect condensation silicone in clinical prosthodontic procedures.

scholarly journals Evaluation of dimensional stability and details reproduction of alginate molds storage in different times and temperature

2018 ◽  
Vol 21 (1) ◽  
pp. 37 ◽  
Author(s):  
Rafael Da Rocha Santos Penfold ◽  
William Cunha Brandt ◽  
Milton Edson Miranda ◽  
Rafael Pino Vitti
Keyword(s):  
Dimensional Stability ◽  
Measurement Accuracy ◽  
Color Change ◽  
Control Group ◽  
Dimensional Measurement Accuracy ◽  
Impression Materials ◽  
Kolmogorov Smirnov ◽  
Dental Impression ◽  
Two Temperatures ◽  
And Control

<p><strong>Objective:</strong> The aim of this study was to evaluate dimensional stability and detail reproduction in alginate molds stored at different times and temperatures. <strong>Material and </strong><strong>Methods:</strong> Three different commercially available alginates (Cavex Color Change, Jeltrate Plus and Hydrogum 5) were tested at four different times (0 - control, 1, 3 and 5 days) and two temperatures (25ºC and 37ºC) (n=5). The alginates were handled following the manufacturer's instructions. The impression procedures occurred in an environment with controlled room temperature (25ºC) and relative humidity (50±5%). A metallic model (ISO 1563:1990) was used to perform the impressions. The tray containing alginate remained on the metallic model under constant pressure (2 kgf) until the alginate gelation process. The molds were stored (different times and temperatures) and analyzed in stereomicroscope at 30x magnification and 0.5 μm accuracy (Olympus Measuring Microscope STM). The molds and the metallic model measurements were compared, and the data were statistically analyzed by Kolmogorov-Smirnov and three-way ANOVA tests, and the means were compared by Tukey test (5%). <strong>Results:</strong> The results showed no double interactions (p&gt;0.05) and the different alginates presented statistically similar values of dimensional stability (p=0.102). However, 25ºC (temperature) and control group (time) showed the highest values of dimensional stability (p&lt;0.05). Jeltrate Plus was the only material that presented inaccuracy in details reproduction. <strong>Conclusion</strong>: It is recommended that, for tested alginates, the stone casts should be poured immediately, even though the molds are dimensionally stable up to 5 days when stored at 25ºC.</p><p><strong> </strong></p><p><strong>Keywords</strong></p><p>Dental impression materials; Dimensional measurement accuracy; Shrinkage.<strong></strong></p>

scholarly journals The effect of disinfectants on dimensional stability of addition and condensation silicone impressions

2014 ◽  
Vol 71 (3) ◽  
pp. 251-258 ◽  
Author(s):  
Tamara Sinobad ◽  
Kosovka Obradovic-Djuricic ◽  
Zoran Nikolic ◽  
Slobodan Dodic ◽  
Vojkan Lazic ◽  
...  
Keyword(s):  
Dimensional Stability ◽  
Software Package ◽  
Control Group ◽  
Dimensional Changes ◽  
Impression Materials ◽  
Metal Ceramic ◽  
Disinfectant Solution ◽  
Stability And Accuracy ◽  
Ceramic Crown ◽  
Regular Body

Background/Aim. Dimensional stability and accuracy of an impression after chemical disinfection by immersion in disinfectants are crucial for the accuracy of final prosthetic restorations. The aim of this study was to assess the deformation of addition and condensation silicone impressions after disinfection in antimicrobial solutions. Methods. A total of 120 impressions were made on the model of the upper arch representing three full metal-ceramic crown preparations. Four impression materials were used: two condensation silicones (Oranwash L - Zhermack and Xantopren L Blue - Heraeus Kulzer) and two addition silicones (Elite H-D + regular body - Zhermack and Flexitime correct flow - Heraeus Kulzer). After removal from the model the impressions were immediately immersed in appropriate disinfectant (gluta-raldehyde, benzalkonium chloride - Sterigum and 5.25% NaOCl) for a period of 10 min. The control group consisted of samples that were not treated with disinfectant solution. Consecutive measurements of identical impressions were realized with a Canon G9 (12 megapixels, 2 fps, 6x/24x), and automated with a computer Asus Lamborghini VX-2R Intel C2D 2.4 GHz, by using Remote Capture software package, so that time-depending series of images of the same impression were obtained. Results. The dimensional changes of all the samples were significant both as a function of time and the applied disinfectant. The results show significant differences of the obtained dimensional changes between the group of condensation silicones and the group of addition silicones for the same time, and the same applied disinfectant (p = 0.026, F = 3.95). Conclusion. The greatest dimensional changes of addition and condensation silicone impressions appear in the first hour after their separation from the model.

Effect of Glass Filler Content on Hydrophilic Addition Silicone Impression Materials in Dentistry

2005 ◽  
Vol 284-286 ◽  
pp. 909-912
Author(s):  
J.K. Kang ◽  
Yong Keun Lee ◽  
Kwang Mahn Kim ◽  
Kyoung Nam Kim
Keyword(s):  
Filler Content ◽  
Dimensional Change ◽  
Aluminosilicate Glass ◽  
Control Group ◽  
Control Groups ◽  
Iso Standard ◽  
Tear Strength ◽  
Impression Materials ◽  
Dental Impression ◽  
Glass Filler

Dental impression materials are used to register or reproduce the form and relationship of the teeth and oral tissues. They should not be torn when removing from the wet mouth after setting. Nowadays, silica is widely used as filler to overcome the low mechanical strength of the dental impression materials. The purpose of this study was to synthesize high strength glass in the system of MgO-CaO-Al2O3-SiO2 and investigate its usefulness according to ISO standard after mixing with addition silicone. Commercial products, Contrast, Examix, Express, and Perfect-F were selected as control group. When the prepared glass filler was introduced in addition silicone impression material, tear strength was drastically increased significantly than that of the control group, keeping the consistency. All experimental groups showed higher tear stength than that of control groups. As the amount of filler content increases, tear strength was increased. Strain in compression, recovery from deformation, and linear dimensional change were satisfied the ISO standard either all the experimental or control groups. Therefore, calcium-substituted magnesium aluminosilicate glass in the system of 12.5MgO-17.5CaO-20Al2O3-50SiO2 is expected the useful filler in the light body of addition silicone impression materials.

scholarly journals Performance of dental impression materials: Benchmarking of materials and techniques by three-dimensional analysis

2015 ◽  
Vol 34 (5) ◽  
pp. 572-584 ◽  
Author(s):  
Heike RUDOLPH ◽  
Michael R. S. GRAF ◽  
Katharina KUHN ◽  
Stephanie RUPF-KÖHLER ◽  
Alfred EIRICH ◽  
...  
Keyword(s):  
Dimensional Analysis ◽  
Three Dimensional ◽  
Impression Materials ◽  
Dental Impression

scholarly journals PERBEDAAN STABILITAS DIMENSI ANTARA CETAKAN ALGINAT YANG DISEMPROT DENGAN LARUTAN NATRIUM HIPOKLORIT 0,5% DAN DETTOL 5%

2017 ◽  
Vol 5 (1) ◽  
pp. 59-70
Author(s):  
Wira Putri Winata ◽  
Kuswardani Susari Putri ◽  
Febrian Febrian
Keyword(s):  
Sodium Hypochlorite ◽  
Dimensional Stability ◽  
Control Group ◽  
Sodium Hypochlorite Solution ◽  
Control Group Design ◽  
Hypochlorite Solution ◽  
Impression Materials ◽  
Significant Difference ◽  
Post Test ◽  
The Difference

The impression materials that most commonly used in dentistry was alginate. Factors that must be considered was the controlled of infection transmission from alginate, it was important to do disinfection using a disinfectant solution. Alginate had imbibition properties, so that disinfection by spraying technique allowed the expansion of alginate affecting the dimensional stability of impressions. The purpose of this research was to determine the difference between the dimensional stability of alginate impression were sprayed with a solution of sodium hypochlorite 0,5% and Dettol® 5%.  The method used was an experimental laboratory with post test only control group design. 27 samples were divided into 3 groups: spraying with 0.5% sodium hypochlorite solution, spraying with 5% Dettol® solution, and spraying with aquades as a controlled. Alginate impressions were sprayed with 0,5% sodium hypochlorite solution, Dettol® 5%, and aquades then filled with gypsum, and then measured dimensional stability by using micrometer screw. Data were analyzed with the Kruskal-Wallis test.  The results showed that differences between the dimensional stability of alginate impressions were sprayed with a solution of sodium hypochlorite 0.5% and 5% Dettol® was not significant (p> 0,05).  The conclusion of this research was there was no significant difference between the alginate impressions were sprayed with a solution of sodium hypochlorite 0,5% and Dettol® 5% to dimensional stability. Keywords : dimensional stability, alginate, sprayed, sodium hypochlorite, Dettol®

scholarly journals Comparison of double-phase impression technique in 1 step and 2 steps by evaluating dimensional stability and accuracy of condensation silicones

2018 ◽  
Vol 63 (01) ◽  
pp. 55-61
Author(s):  
Borjan Naumovski ◽  
Jadranka Bundevska ◽  
Biljana Kapusevska
Keyword(s):  
Dimensional Stability ◽  
Impression Material ◽  
Impression Technique ◽  
Impression Materials ◽  
Double Phase ◽  
Dental Impression ◽  
Master Model ◽  
Stability And Accuracy ◽  
Plaster Model ◽  
Selection Of

The diverse viscosities of silicone impression materials are suited for their use in various impression techniques, intended to improve the precision of the cast impression in the form of a plaster model. The purpose of this research is to determine the dimensional stability and accuracy of the double-phase impression technique in 1 step and 2 steps by using a condensation silicone impression material. This research was carried out by using a precise stainless-steel master model and an individual aluminum tray. Comparing the abutments of the master model and the abutments of the double-phase impression technique in 2 steps, showed that they are wider on average 81 µm, while the abutments from the double-phase impression technique in 1 step are on average 281 µm wider in diameter. After analyzing the results obtained in relation to the diameter of the abutments, it can be concluded that the double-phase impression technique in 2 steps is dimensionally more stable and accurate compared to the double-phase impression technique in 1 step. This study shows that dimensional stability and accuracy of impression materials also depend on the selection of appropriate impression technique and proper performance in order to obtain a high quality dental impression that will be the basis for an accurate fixed-prosthodontic fabrication. Keywords: silicone impression material, impression technique, fixed partial dentures, dimensional stability and accuracy

Two- and three-dimensional accuracy of dental impression materials: Effects of storage time and moisture contamination

2010 ◽  
Vol 20 (5) ◽  
pp. 243-249 ◽  
Author(s):  
Deepa T. Chandran ◽  
Daryll C. Jagger ◽  
Robert G. Jagger ◽  
Michele E. Barbour
Keyword(s):  
Storage Time ◽  
Three Dimensional ◽  
Dimensional Accuracy ◽  
Impression Materials ◽  
Dental Impression
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