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 The Effects of Chemical Disinfection on Dimensional Stability among Different Type of Impression Addition Silicon Materials

2020 ◽  
Vol 5 (12) ◽  
pp. 645-649
Author(s):  
Salah A. Yousief ◽  
Khames T. Alzahrani ◽  
Suha M. Alhuwairini ◽  
Fai Y. Alharbi ◽  
Dalal A. Eissa ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Epoxy Resin ◽  
Dimensional Stability ◽  
Control Group ◽  
P Value ◽  
Impression Material ◽  
Dimensional Changes ◽  
The Mean ◽  
Master Model ◽  
The Cross

Introduction: Saliva and blood contaminated impressions are often a source of cross contamination between the clinic and dental laboratory. Explicit communication and observance of an infection control protocol for handling of dental impressions must exist among the office staff as well as between office and dental laboratories. Though disinfection of impression is routinely followed, autoclaving elastomeric impression is an effective method of sterilization them. Objectives: The purpose of this study was to evaluate dimensional stability and detail reproduction of a new addition silicon impression material after disinfection. Methods: In this study, a total of twenty impressions for the master model using heat resistant plastic stock trays. The twenty impressions were divided into two groups according to disinfection technique: (Table 2) Group 1: (n=10) Control group, untreated impressions. (C.G) Group 2: (n=10) Impressions were chemically disinfected. (D.G). after all impressions treatment, they were poured with extra hard stone (type IV) to get stone casts. Dimensional accuracy and detail reproduction of the impression material were evaluated indirectly through the recovered improved stone casts from impressions of the master model using the travelling microscope. Results: Cross arch distance (A): Epoxy resin master model cross arch distance measurement (A) was (41.36 mm). 1.1 Measurements of the cross-arch distance of stone casts Control group (C.G): The mean and standard deviation values of distance (A) in stone models obtained from C.G. were 41.553 ± 0.170 mm. Disinfection group (D.G): The mean and standard deviation values of distance (A) in stone models obtained from D.G were 41.368 ± 0.083 mm. ANOVA test showed that there was a statistically difference shrinkage between the groups (P-value = 0.006). 1.2 Measurement of the dimensional changes in the cross-arch distance of the different groups. The mean and standard deviation values of cross arch distance changes in stone models of C.G. were 0.191 ± 0.170 mm. while dimensional changes in stone models obtained from D.G. were 0.006 ± 0.082 mm. Conclusion: The purpose of this study was to evaluate dimensional stability and detail reproduction of a new addition silicon impression material after disinfection. In this study an epoxy resin master model was duplicated from a modified dentate mandibular model. Within the limitations of this study, it could be concluded that Chemical disinfectant of polyvinyl siloxane impression material can be successfully used in making fixed partial dentures.

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).

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.

Hypochlorous Acid 0.01% vs Povidone-Iodine 5% for Ocular Antisepsis

2021 ◽  
pp. 247412642110136
Author(s):  
Thomas W. Hejkal ◽  
Lauren A. Maloley ◽  
Layan Kaddoura
Keyword(s):  
Hypochlorous Acid ◽  
Povidone Iodine ◽  
Bacterial Load ◽  
Antimicrobial Effect ◽  
Lower Eyelid ◽  
Eyelid Margin ◽  
Minute Exposure ◽  
Sterile Saline ◽  
Colony Forming Units ◽  
The Mean

Purpose: An alternative ocular antiseptic is needed for patients who do not tolerate povidone-iodine (PI). The purpose of this study is to compare the antimicrobial effect of hypochlorous acid (HA) 0.01% with PI 5% applied topically to the ocular surface. Methods: Swabs of the inferior conjunctiva and posterior lower eyelid margin of 40 patients were taken from both eyes and plated onto blood agar plates. One eye was treated with HA and the other with PI, and swabs were taken after 1-minute exposure. The eye treated with PI was rinsed with sterile saline and another swab was taken. Colony-forming units (CFUs) were recorded after 2 days. Patients rated the level of irritation after treatment in each eye. Results: HA and PI both gave significant reduction in CFUs from baseline ( P < .001 for HA and P = .002 for PI). The mean reduction in logCFU ± 95% CI was 0.850 ± 0.387 or greater for HA and 0.749 ± 0.385 or greater for PI; this was equivalent to a mean reduction of 7.1-fold or greater or 86% or greater (95% CI, 66%-94%) for HA and 5.6-fold or greater or 82% or greater (95% CI, 57%-93%) for PI. CFUs increased in 17 eyes after saline rinse. PI caused substantial irritation in 31 of the 40 participants, whereas no individuals had any irritation from topical HA. Conclusions: Both HA and PI were effective in reducing ocular bacterial load. Unlike PI, HA was not irritating to the eye. Saline rinse after topical PI may increase bacterial counts in some individuals.

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

scholarly journals Dimensional Stability of Elastomeric Impression Material After Disinfection Via Immersion and Microwave Irradiation

2021 ◽  
Vol 15 (1) ◽  
pp. 658-663
Author(s):  
Noorhayati R. Mohd ◽  
Ros A. Omar ◽  
Enas A. Etajuri
Keyword(s):  
Microwave Irradiation ◽  
Dimensional Stability ◽  
Control Group ◽  
Clinical Settings ◽  
Image Analyzer ◽  
Impression Material ◽  
Average Percentage ◽  
Dimensional Changes ◽  
Impression Materials ◽  
Post Hoc

Aims: This study aimed to evaluate and compare the dimensional stability of two elastomeric impression materials, namely polyvinyl siloxane (PVS) and vinyl siloxanether (VSE), subjected to chemical immersion and microwave irradiation for disinfection. Materials and Methods: Sixty discs of PVS and VSE impression materials each were prepared using a stainless-steel test die and ring in accordance with ANSI/ADA Specification No. 19. Twenty discs of each impression material were disinfected by chemical immersion for 10 min; another 20 discs were subjected to dry microwave irradiation for 3 min. The other 20 discs served as a control group. Dimensional stability measurements were then performed using an image analyzer at 20× magnification. The data were analyzed by one-way analysis of variance (α=0.05) and Bonferroni (post hoc) test for multiple comparisons to detect significant differences between the groups. Results: When subjected to microwave irradiation, both PVS and VSE showed dimensional changes, but the changes were within the limit of 1.5% set by ANSI/ADA (P<0.00). VSE showed markedly better results than PVS for both disinfection methods. The immersion disinfection method resulted in a higher average percentage of linear dimensional changes than both the microwave irradiation and the control for VSE and PVS impression materials. Conclusion: VSE exhibited excellent dimensional stability than PVS under both chemical immersion and microwave irradiation. Microwave irradiation using conventional microwave ovens can be used in clinical settings as an alternative to other disinfection techniques because the dimensional changes of the elastomeric impression materials subjected to microwave irradiation have been observed to be within the clinically acceptable limit set by the ANSI/ADA standard.

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 The Role of Chlorhexidine in the Prevention of Pin Tract Infection as Compared to Povidone-Iodine in Patients Managed by Ilizarov Circular Fixator

2021 ◽  
Vol 15 (5) ◽  
pp. 1751-1754
Author(s):  
Asadullah Makhdoom ◽  
Raheel Akbar Baloch ◽  
Tahir Sheikh ◽  
Jahazaib Khaskhali ◽  
Muhammad Faraz Jokhio ◽  
...  
Keyword(s):  
Tract Infection ◽  
Normal Saline ◽  
Povidone Iodine ◽  
Previous History ◽  
Health Science ◽  
Control Group ◽  
Site Infection ◽  
Pin Site ◽  
The Mean ◽  
Pin Tract Infection

Objective: To compare the efficacy of Chlorhexidine in the prevention of pin tract infection as compared to Povidone-iodine antiseptic. Study Design: Prospective, single blinded randomized trial. Study Setting and Duration: Liaquat University of Health Science (LUMHS), Jamshoro between July 2018 to November 2020. Methodology: All patients who underwent Ilizarov external fixation as per indications were eligible for the study. Individuals with a previous history of osteomyelitis were excluded from the study. Pin sites were cleansed with normal saline using clean applicators. In the group chlorhexidine, the antiseptic was applied on the pin skin interphases (1% chlorhexidine). Similarly, 10% povidone iodine was applied to patients in group C. The control group was cleansed with normal saline. Pin sites were either dressed daily or weekly. The primary outcome was the rate of pin site infection days. Results: Chlorhexidine group had significantly lesser pin-site infections as compared to the povidone-iodine group with a frequency of 13 (39.39%) and 19 (63.33%), p=0.04, respectively. The mean pin tract infection rate days ± SD were significantly lower in the chlorhexidine group as compared to the povidone-iodine group (1.35 ± 2.26 vs 3.54 ± 4.30, p=0.041). Similarly, the mean duration to onset of pin site infection was also significantly higher in the chlorhexidine group compared to povidone-iodine and control groups. Conclusion: Patients who used Chlorhexidine as the cleansing agent had significantly fewer pin-site infections as compared to the povidone-iodine group. Keywords: Chlorhexidine, Ilizarov fixator, fracture, Povidone-iodine

scholarly journals Study on antimicrobial effect of disinfecting solutions on alginate impression materials

2014 ◽  
Vol 3 (1) ◽  
pp. 18-23
Author(s):  
Mohamad Rafiul Ahsan ◽  
Kazi Ziaul Islam ◽  
Jebunnesa Begum
Keyword(s):  
Sodium Hypochlorite ◽  
Transmission Rate ◽  
Antimicrobial Effect ◽  
Control Group ◽  
Sodium Hypochlorite Solution ◽  
Impression Materials ◽  
Irreversible Hydrocolloid ◽  
Disinfectant Solution ◽  
Glutaraldehyde Solution ◽  
Micro Organisms

Oral cavity contains 600 species of microbes named oral flora.Dental impressions get contaminated with micro-organisms from patient’s blood or saliva. So, impressions are recommended to disinfect before their further working steps. A study was carried out to find out a more effective disinfectant solution between 1% sodium hypochlorite and 2% glutaraldehyde solution on irreversible hydrocolloid impression and thereby identify their efficacy against microbial transmission to the resultant dental cast. In this study, hydrcolloid impression material was selected as the experimental elements because these are the materials which are mostly used in our country. These are disinfecting solution which are worldwide used. The findings suggested that the transmission rate from impression to the casts was 7% in control group (P<0.001). It was reduced to (0.6%) when disinfected by 1% sodium hypochlorite solution whereas transmission rate was minimum (0.08%) when disinfected by 2% glutaraldehde solution. The most important things is that it will be very easy for the clinician to produce this solution and disinfect the impression by these solutions and there will have no effect on the dimension of the impression or the cast DOI: http://dx.doi.org/10.3329/updcj.v3i1.17980 Update Dent. Coll. j: 2013; 3 (1): 18-23

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