scholarly journals Effects of Water/Powder Ratio of Irreversible Hydrocolloid on Dimensional Stability of Impressions

2020 ◽  
Vol 32 (3) ◽  
pp. 43-49
Author(s):  
Ehsan Ghasemi ◽  
◽  
Behnaz Ebadian ◽  
Alireza Asadi ◽  
Nafiseh Ghasemi ◽  
...  
Keyword(s):  
Dimensional Stability ◽  
Irreversible Hydrocolloid

scholarly journals A self-disinfecting irreversible hydrocolloid impression material mixed with povidone iodine powder

2016 ◽  
Vol 10 (04) ◽  
pp. 507-511 ◽  
Author(s):  
Hussien Abdalfatah Ismail ◽  
Hani Asfour ◽  
Souaad Abdulelah Shikho
Keyword(s):  
Dimensional Stability ◽  
Povidone Iodine ◽  
Antimicrobial Effect ◽  
Control Group ◽  
Impression Material ◽  
Irreversible Hydrocolloid ◽  
Weight Test ◽  
The Mean ◽  
And Staphylococcus Aureus ◽  
Stability Results

ABSTRACT Objectives: The aim was to evaluate the effect of adding povidone (PVP) iodine powder with different concentrations to irreversible hydrocolloid on both microbiological and dimensional stability. Materials and Methods: Regular set of (alginate) irreversible hydrocolloid was selected as control group. PVP-iodine powder was mixed with the alginate powder at concentrations of 1, 5, 10, 15, and 20% by weight (test groups). All specimens were tested for their antimicrobial effect against Streptococcus mutans and Staphylococcus aureus as well as dimensional stability. Results: The results of test groups showed that concentrations 1, 5, and 10, weight % had little effect against S. mutans and S. aureus microorganisms. While concentrations 15 and 20 weight % had demonstrated greater effect on microbial growth. The mean of dimensional stability in mm of modified alginate with PVP-iodine at 15 and 20 weight % was –0.119 ± 0.255 and –0.035 ± 0.074, respectively. While the mean dimensional stability in mm of unmodified alginate was –0.112 ± 0.176 . The results of dimensional stability showed that 15 and 20 concentrations of test groups adversely affect the dimensional stability. The adverse effect was noticed to be significant in concentration 20%, where as it was nonsignificant in 15% concentration. Conclusion: Modified alginate impression material with 15 weight % PVP-iodine powered give the material, a self-disinfected properties with less deteriorating effect on dimensional stability.

scholarly journals COMPARISON OF THE ADDITION OF Manihot utilisima (PATI UBI WOOD) TO DIMENSIONAL STABILITY OF IRREVERSIBLE HYDROCOLLOID MOLD

2021 ◽  
Vol 1 (Volume 1 No 1) ◽  
pp. 19-26
Author(s):  
Ilmianti ◽  
Muhammad Iqbal ◽  
Muhammad Hidayatullah
Keyword(s):  
Dimensional Stability ◽  
Cassava Starch ◽  
Alternative Form ◽  
Control Group ◽  
Impression Material ◽  
Molding Material ◽  
Irreversible Hydrocolloid ◽  
Group A ◽  
Materials Used ◽  
Printed Materials

Alginate impression material is used to print the teeth and the oral tissues; alginate molding material is from abroad and expensive. Modification to the impression material alginate with cassava starch with 1: 1 obtained detailed reproduction of the same printed material alginate without added with cassava starch. The study's objective was to get an alternative form of printed material alginate plus Manihot utilisima (cassava starch) with the nature of the physical properties following the standard. The study methods used laboratory experiments. The materials used in this study were printed material alginate (Hydrogum fast setting), starch cassava starch cap dua kelinci, water, and tools calliper inside digital. There were four groups of a control group, a group cassava starch ratio of 50: 50, groups of cassava starch ratio of 60: 40, and a comparison group of cassava starch 70: 30. The results were dimensional stability of printed materials Alginate without additions were (73.72, 48.77, 30.51), the dimensional stability of the printed material alginate with a ratio of 50: 50 were (74.24, 40.82, 30.76), the dimensional stability of the printed material alginate with a ratio of 60: 30 were ( 75.39, 49.67, 31.57), and the results of dimensional stability alginate ((irrevesible hydrocolloid ) molding material with a ratio of 70: 30 were (76.36, 50.94, 32.86). The conclusion is the addition of Manihot utilisima on standard printed material alginate (irrevesible hydrocolloid) obtained dimensional stability test results that met the standards at a ratio of 50: 50 of ANSI/ADA no.18/1992. Manihot utilisima was one of the appropriate alternatives as a mixture in impression material alginate (irrevesible hydrocolloid).

Dimensional stability of irreversible hydrocolloid impression material

1979 ◽  
Vol 75 (4) ◽  
pp. 438-446 ◽  
Author(s):  
Robert M. Coleman ◽  
John H. Hembree ◽  
Faustin N. Weber
Keyword(s):  
Dimensional Stability ◽  
Impression Material ◽  
Irreversible Hydrocolloid

Effect of Storage Time on the Accuracy of Casts Made from Different Irreversible Hydrocolloids

2008 ◽  
Vol 9 (4) ◽  
pp. 59-66 ◽  
Author(s):  
Maurizio Sedda ◽  
Andrea Casarotto ◽  
Aune Raustia ◽  
Andrea Borracchini
Keyword(s):  
Relative Humidity ◽  
Dimensional Stability ◽  
Storage Time ◽  
Time Dependent ◽  
Special Device ◽  
Specific Storage ◽  
Tukey Test ◽  
Impression Materials ◽  
Irreversible Hydrocolloid ◽  
Master Model

Abstract Aim Several new irreversible hydrocolloid formulations have recently become available with claims of an improved dimensional stability by the manufacturers. The aim of this study was to evaluate the accuracy of casts made from alginate impression materials poured immediately and after specific storage periods. Methods and Materials Five alginates were tested: CA 37 (Cavex); Jeltrate (Dentsply Caulk); Jeltrate Plus (Dentsply Latin America); Hydrogum 5 (Zhermack); and Alginoplast (Heraeus Kulzer). A master model was mounted on a special device and used to obtain the impressions. These impressions were stored at 23°C and 100% relative humidity, then poured with gypsum immediately, and again after 24, 72 and 120 hours. The casts were measured and the data were analyzed by one way analysis of variance (ANOVA) and Tukey test at p<0.05. Results The dimensional stability of the alginate impressions was both material and time dependent (p<0.05). After 24 hours of storage, only Alginoplast and Hydrogum 5 comply with the master model (p>0.05). After 72 and 120 hours, only Hydrogum 5 was dimensionally stable (p>0.05). Conclusion The dimensional stability of the alginate impressions is influenced by the selected material and the storage time. Clinical Significance Alginate impressions should generally be poured immediately. However, some new types of alginate may have the pouring delayed. Citation Sedda M, Casarotto A, Raustia A, Borracchini A. Effect of Storage Time on the Accuracy of Casts Made from Different Irreversible Hydrocolloids. J Contemp Dent Pract 2008 May; (9)4:059-066.

scholarly journals Evaluation of Antibacterial Effect and Dimensional Stability of Self-disinfecting Irreversible Hydrocolloid: An in vitro Study

2017 ◽  
Vol 18 (10) ◽  
pp. 887-892 ◽  
Author(s):  
Veena B Benakatti ◽  
Abhijit P Patil ◽  
Jayashee Sajjanar ◽  
Supriya S Shetye ◽  
Ulhas N Amasi ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Dimensional Stability ◽  
Antibacterial Effect ◽  
In Vitro Study ◽  
Chlorhexidine Gluconate ◽  
Control Group ◽  
Impression Material ◽  
Group I ◽  
Irreversible Hydrocolloid

ABSTRACT Aim This study evaluated the antibacterial activity and dimensional stability of irreversible hydrocolloids mixed with different concentrations of chlorhexidine gluconate instead of water. Materials and methods Experimental specimens (45 specimens) were prepared and allocated into three groups of 15 each. Group I: Impression material mixed with distilled water served as control. Groups II and III were prepared with 0.12 and 0.2% chlorhexidine gluconate solution, respectively. Specimens in each group were subjected to tests for dimensional stability. For antimicrobial activity, 30 specimens were prepared and allocated into three groups of 10 each named as group I (control), group II (0.12% chlorhexidine gluconate), and group III (0.2% chlorhexidine gluconate) similar to specimens for dimensional stability. Statistical analysis was performed using a one-way analysis of variance (ANOVA) and Tukey test. Results Zones of inhibition were observed around test specimens, but not around control specimens; there was a significant intergroup difference in the diameters of the inhibition zones. In the test for dimensional stability, no significant differences were detected among groups, and the accuracy was clinically acceptable. Conclusion Irreversible hydrocolloid impression material mixed with chlorhexidine exhibits varying degrees of antibacterial activity without influencing the dimensional stability of set material. Clinical significance Many contagious diseases can be prevented by practical control of infection in the dental office. Chlorhexidine gluconate, as a mixing liquid, ensures disinfection of impression, and this method of disinfection is more convenient and avoids extra effort as in other disinfection techniques. How to cite this article Benakatti VB, Patil AP, Sajjanar J, Shetye SS, Amasi UN, Patil R. Evaluation of Antibacterial Effect and Dimensional Stability of Self-disinfecting Irreversible Hydrocolloid: An in vitro Study. J Contemp Dent Pract 2017;18(10):887-892.

scholarly journals A Promising Potential of Brown Algae Sargassum polycystum as Irreversible Hydrocolloid Impression Material

Marine Drugs ◽  
2022 ◽  
Vol 20 (1) ◽  
pp. 55
Author(s):  
Nurlindah Hamrun ◽  
Bahruddin Talib ◽  
Muhammad Ruslin ◽  
Hasminar Pangeran ◽  
Mochammad Hatta ◽  
...  
Keyword(s):  
Dimensional Stability ◽  
Brown Algae ◽  
Dimensional Accuracy ◽  
Impression Material ◽  
Sargassum Polycystum ◽  
Impression Materials ◽  
Measurement Results ◽  
Irreversible Hydrocolloid ◽  
Dental Cast ◽  
Digital Caliper

This study aimed to investigate the potential use of brown algae Sargassum polycystum as irreversible hydrocolloid (alginate) impression material. Potassium alginate extracted from Sargassum polycystum was prepared in three different compositions (14%, 15%, and 16%) and mixed with other standard components to form an alginate impression material. Prior to that, the purity of potassium alginate was quantified with Fourier Transform Infrared Spectroscopy (FTIR) analysis. As a control material, the alginate impression material from a commercially available product was used. All alginate impression materials were then applied to a die stone model. Dimensional accuracy was measured by calculating the mesiodistal width of incisors in the generated dental cast using a digital caliper 0.01 accuracy (five replications). In addition, to evaluate the dimensional stability, the impression results were poured at four different periods (immediately, 5 min, 10 min, and 15 min). An independent t-test was performed to compare the measurement results with p < 0.05 considered significant. Analytical results confirm that the impression material containing 15% potassium alginate gives the best dimensional accuracy similar to control (p > 0.05). Meanwhile, the optimal dimensional stability was produced in the impression material containing 16% potassium alginate. Our study suggested that brown algae Sargassum polycystum has a promising potential to be used as an alginate impression material in clinical application.

scholarly journals Impact of Storage Environments on the Dimensional Stability of Irreversible Hydrocolloid Alginate Impression used in Dentistry

2014 ◽  
Vol 3 (1) ◽  
pp. 24 ◽  
Author(s):  
Kukkila Jayaprakash ◽  
Bantarahalli Nandish ◽  
Harish K ◽  
A Shetty ◽  
Shama Voddya ◽  
...  
Keyword(s):  
Dimensional Stability ◽  
Irreversible Hydrocolloid

scholarly journals Linear dimensional stability of irreversible hydrocolloids with and without disinfection at different storage times

RSBO ◽  
2019 ◽  
Vol 15 (2) ◽  
pp. 77
Author(s):  
Lidia Olga Bach Pinheiro ◽  
Alfonso Sanchez Ayala ◽  
Marcos Cezar Pomini ◽  
Vanessa Taborda da Cruz ◽  
Ingrid Viel del Farias ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Dimensional Stability ◽  
Storage Time ◽  
Dental Practice ◽  
Type Iv ◽  
Significant Difference ◽  
Irreversible Hydrocolloid ◽  
Master Model ◽  
Storage Times ◽  
Digital Caliper

Irreversible hydrocolloids have been used in dental practice for decades and their pouring time has been suggested to be as short as possible; however the latest generation of alginates exhibit better properties, which could influence the fidelity of the casts. Objective: To evaluate the linear dimensional stability of stone casts obtained using two irreversible hydrocolloid brands (Cavex ColorChange and Jeltrate) after disinfection. Material and methods: Samples were divided into 16 groups (n = 10) according to brand, storage time and disinfection. Impressions were taken of a metallic master model made of stainless steel with two abutments. Cast models were obtained using type IV gypsum, after disinfection with sodium hypochlorite at 1% or without any disinfection followed by storage for four different times (immediate pouring, and after 24, 72 or 120 hours storage after obtaining the impressions) and the models were measured with a digital caliper. Data were submitted to ANOVA 3-way followed by Tukey’s test (α < 0.05). Results: A statistically significant difference was detected with Jeltrate Plus after 72 and 120 hours in storage (with and without disinfection), as well as Cavex without disinfection. Differences were found for Cavex with disinfection/24 hours storage, when compared to immediate pouring (P < 0.05). The alginates presented similar behavior regarding disinfection for the same time (P > 0.05). Conclusion: Storage longer than 24 hours affects the fidelity of casts. Disinfection does not promote significant alteration at any of the experimental times with either material.

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