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Joshi S, Madhav VNV, Saini RS, Gurumurthy V, Alshadidi AAF, Aldosari LIN, Okshah A, Mosaddad SA, Heboyan A. Evaluation of the effect of chemical disinfection and ultraviolet disinfection on the dimensional stability of polyether impression material: an in-vitro study. BMC Oral Health 2024; 24:458. [PMID: 38622548 PMCID: PMC11020824 DOI: 10.1186/s12903-024-04188-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 03/26/2024] [Indexed: 04/17/2024] Open
Abstract
BACKGROUND Various methods, chemical and physical, disinfect dental impressions. Common chemicals include 1% Sodium Hypochlorite and 2% glutaraldehyde, while UV radiation is a prevalent physical method. Few studies compare their effects on dimensional stability in polyether impressions. This study aims to assess such stability using different disinfection methods. Therefore, this study was planned to evaluate the dimensional stability of polyether impression material using different disinfection methods. METHODS This in vitro study compared the effects of chemical disinfectants (1% Sodium Hypochlorite and 2% glutaraldehyde) and UV irradiation on the dimensional stability of polyether impression material. Groups A, B, C, and D, each with ten samples (N = 10), were studied. Group A was untreated (control). Group B was treated with 2% glutaraldehyde for 20 min, Group C with 1% Sodium Hypochlorite for 20 min, and Group D with UV rays for 20 min. A pilot milling machine drill was used to make four parallel holes labeled A, B, C, and D in the anterior and premolar regions from right to left. After sequential drilling, four implant analogs were positioned using a surveyor for accuracy. Ten open-tray polyether impressions were made and treated as described in the groups, followed by pouring the corresponding casts. Distortion values for each disinfection method were measured using a coordinate measuring machine capable of recording on the X- and Y-axes. RESULTS A comprehensive analysis was conducted using the one-way ANOVA test for distinct groups labeled A, B, C, and D, revealing significant differences in the mean distances for X1, X2, X4, X5, and X6 among the groups, with p-values ranging from 0.001 to 0.000. However, no significant differences were observed in X3. Notably, mean distances for the Y variables exhibited substantial differences among the groups, emphasizing parameter variations, with p-values ranging from 0.000 to 0.033. The results compared the four groups using the one-way ANOVA test, revealing statistically significant distance differences for most X and Y variables, except for X3 and Y4. Similarly, post-hoc Tukey's tests provided specific pairwise comparisons, underlining the distinctions between group C and the others in the mean and deviation distances for various variables on both the X- and Y-axes. CONCLUSIONS This study found that disinfection with 1% sodium hypochlorite or UV rays for 20 min maintained dimensional stability in polyether impressions.
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Affiliation(s)
- Snehal Joshi
- Department of Prosthodontics, SMBT Dental College and Hospital, Sangamner, 422608, Maharashtra, India
| | - V N V Madhav
- Department of Prosthodontics, YCMM & RDF's Dental College and Hospital, Ahmednagar, India
| | - Ravinder S Saini
- Department of Dental Technology, COAMS, King Khalid University, Abha, Saudi Arabia
| | | | | | | | - Abdulmajeed Okshah
- Department of Dental Technology, COAMS, King Khalid University, Abha, Saudi Arabia
| | - Seyed Ali Mosaddad
- Department of Research Analytics, Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College and Hospitals, Saveetha University, Chennai, India.
- Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Qasr-e-Dasht Street, Shiraz, Iran.
| | - Artak Heboyan
- Department of Research Analytics, Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College and Hospitals, Saveetha University, Chennai, India.
- Department of Prosthodontics, Faculty of Stomatology, Yerevan State Medical University after Mkhitar Heratsi, Str. Koryun 2, Yerevan, 0025, Armenia.
- Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
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Taymour N, Hussein Abdel Kader S, Aboushelib MN, Gad MM. Comparative analysis of dimensional changes in autoclavable polyvinyl siloxane (PVS) impressions under various Sterilization/Disinfection Protocols: A randomized controlled trial. Saudi Dent J 2024; 36:603-609. [PMID: 38690388 PMCID: PMC11056420 DOI: 10.1016/j.sdentj.2024.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/30/2024] [Accepted: 01/31/2024] [Indexed: 05/02/2024] Open
Abstract
Background Impressions that maintain their dimensional stability after autoclaving effectively control cross-infection and contamination resulting from a patient's oral secretions. Purpose The study aimed to assess the dimensional stability of autoclavable polyvinyl siloxanes after disinfection and sterilization. Methods A stainless steel metal model containing three full veneer crown preparations was fabricated according to ANSI/ADA specification No. 19. Reference grooves were established on the occlusal and axial surfaces of the abutments for accurate measurements. Forty impressions were created from the master model using single-step impression technique monophase polyvinyl siloxane material (AFFINIS, Coltene/Whaledent, Altstatten, Switzerland). The impressions were categorized into four groups: Group A (control, ten untreated impressions), Group B (ten disinfected impressions with 5.25 % sodium hypochlorite [NaOCl]), Group C (ten disinfected impressions with 2 % glutaraldehyde), and Group D (ten autoclaved impressions at 134 °C for 18 min). Subsequently, stone casts were produced using type IV gypsum products (Gelstone R, BK Giulini Chemie, Ludwigshafen/Rh., Germany). The dimensional accuracy of the obtained casts was assessed by measuring the inter-abutment measurements (between the abutments) and the intra-abutment measurements (diameter and height of the abutments). These measurements were performed using a universal measuring microscope (Olympus stereomicroscope B061 Imaging Corp. Tokyo, Japan) with a precision of 0.001 mm. The dimensions of the stone casts from the study groups were then compared to those of the control group. Data analysis was performed using a one-way ANOVA with a significance level of α = 0.05. Results AFFINIS impressions subjected to chemical disinfection in 5.25 % NaOCl and 2 % glutaraldehyde with different immersion times showed slight expansion in the intra- and inter-abutment measurements. The impressions autoclaved at 134 °C for 18 min showed slight shrinkage in the intra- and inter-abutment measurements. The dimensional change was statistically non-significant, and the percent of dimensional changes within the experimental groups was within the clinically accepted limit (α < 0.5). Conclusion AFFINIS polyvinyl siloxanes retain dimensional stability suitable for clinical use when subjected to chemical disinfection and steam autoclaving.
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Affiliation(s)
- Noha Taymour
- Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Sanaa Hussein Abdel Kader
- Department of Conservative Dentistry, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Moustafa N. Aboushelib
- Department of Dental Biomaterials, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Mohammed M. Gad
- Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
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Sabharwal N, Arora A, Upadhyaya V, Sehgal MM, Nayak K, Katyal S, Dahiya M, Pratap C, Sharma R. Impression Disinfection and Its Effect on Dimensional Accuracy and Surface Detail in the Times of COVID-19: An In Vitro Study. Cureus 2024; 16:e55931. [PMID: 38623104 PMCID: PMC11017823 DOI: 10.7759/cureus.55931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/10/2024] [Indexed: 04/17/2024] Open
Abstract
Introduction The disinfection of impressions is crucial to eliminate the viral and other microbial loads to prevent the cross contamination of diseases. The aim of this study was to compare the effect of different virucidal disinfecting methods on the dimensional accuracy and surface detail reproduction (SDR) of impression materials. Methods A total of 160 samples were fabricated with different impression materials using zinc oxide eugenol (Group 1), alginate (Group 2), polyether (Group 3), and addition silicone (Group 4) impression materials, each containing 40 samples (n=40). These groups were further divided into Subgroups A, B, C, and D (n=10) based on the disinfecting method used. Disinfection was carried out using 0.2% peracetic acid (A), a natural polymer of glucosamine (B), ultraviolet (UV) radiation (C), and ozonated water (D). The disinfected impressions were poured in type IV gypsum, and the obtained casts were checked for dimensional accuracy and surface detail reproduction (SDR). For dimensional accuracy, a one-way analysis of variance (ANOVA) test and, for surface detail reproduction, the chi-square test were used to compare the different subgroups of each impression material separately. Results Zinc oxide eugenol samples showed the lowest mean dimensional change when disinfected with 0.2% peracetic acid (1A=154.1 µm), and alginate showed the lowest mean dimensional change when disinfected using ozonated water (2D=134.9 µm). On the other hand, the lowest mean dimensional change observed in polyether and addition silicone samples was those which were disinfected using UV radiation (3C=100.9 µm and 4C=113.5 µm). Surface detail was reproduced adequately in most of the samples. Conclusion A 0.2% peracetic acid could be used to disinfect zinc oxide eugenol impressions, ozonated water for alginate impressions, and UV radiation for polyether and addition silicone impressions.
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Affiliation(s)
- Niharika Sabharwal
- Prosthodontics, Institute of Technology and Science (ITS) Dental College, Ghaziabad, IND
| | - Aman Arora
- Prosthodontics, JN Kapoor Dayanand Anglo Vedic (DAV) Dental College, Yamunanagar, IND
| | - Viram Upadhyaya
- Prosthodontics, JN Kapoor Dayanand Anglo Vedic (DAV) Dental College, Yamunanagar, IND
| | - Monika M Sehgal
- Prosthodontics, JN Kapoor Dayanand Anglo Vedic (DAV) Dental College, Yamunanagar, IND
| | - Karvika Nayak
- Prosthodontics, Institute of Technology and Science (ITS) Dental College, Ghaziabad, IND
| | - Setu Katyal
- Endodontics, Institute of Technology and Science (ITS) Dental College, Ghaziabad, IND
| | - Manisha Dahiya
- Prosthodontics, JN Kapoor Dayanand Anglo Vedic (DAV) Dental College, Yamunanagar, IND
| | - Chandrama Pratap
- Prosthodontics, JN Kapoor Dayanand Anglo Vedic (DAV) Dental College, Yamunanagar, IND
| | - Radhika Sharma
- Prosthodontics, JN Kapoor Dayanand Anglo Vedic (DAV) Dental College, Yamunanagar, IND
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Malateaux G, Salazar-Gamarra RE, de Souza Silva J, Pecorari VGA, Suffredini IB, Netto FP, Neves CR, Rodrigues de Souza I, de Mello Mesquita AM, Dib LL. Ultraviolet C as a method of disinfecting medical silicone used in facial prostheses: An in vitro study - Part 2. J Prosthet Dent 2024:S0022-3913(24)00006-4. [PMID: 38307751 DOI: 10.1016/j.prosdent.2024.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 01/02/2024] [Accepted: 01/05/2024] [Indexed: 02/04/2024]
Abstract
STATEMENT OF PROBLEM Disinfection is an important factor in preserving facial prostheses and maintaining tissue health. However, whether disinfection with ultraviolet C is an effective disinfection method is unclear. PURPOSE The purpose of this in vitro study was to evaluate the effectiveness of irradiation with different exposure durations of an ultraviolet-C light-emitting diode in the disinfection of the silicone (A-588-1; Factor II) used in facial prostheses. MATERIAL AND METHODS A total of 216 specimens were prepared, contaminated by multispecies biofilm, and divided into 9 groups (n=24) for different treatments: chlorhexidine 0.12% (G CHG), ultraviolet-C light-emitting diode for 5 minutes (G UVC5), ultraviolet-C light-emitting diode for 10 minutes (G UVC10), ultraviolet-C light-emitting diode for 20 minutes (G UVC20), their respective untreated controls (Gcontrol CHG, Gcontrol UVC5, Gcontrol UVC10, Gcontrol UVC20), and dimethyl sulfoxide (G DMSO) as the negative control. Cell viability was measured by using the methyl tetrazolium salt (MTT) method. Two statistical analyses were performed. First, a 2×3 ANOVA was carried out to compare the control groups (Gcontrol UVC5, Gcontrol UVC10, and Gcontrol UVC20) and the experimental groups of UV-C LED light with different exposure durations (G UVC5, G UVC10, and G UVC20). The second analysis was performed using generalized linear models to compare the optical density of the groups (G UVC5, G UVC10, G UVC20, G CHG, and G DMSO). RESULTS Cell viability results demonstrated a microbial reduction after exposure to the ultraviolet-C light-emitting diode for 20 minutes (G UVC20) compared with untreated controls (P<.05). The 5- and 10-minute exposures were statistically similar to their respective control groups (P>.05). The 20 minutes exposure had the lowest average optical density value, being statistically different from the 5-minute exposure (P<.05). A 20-minute exposure to the ultraviolet-C light-emitting diode (G UVC20) was similarly effective when compared with the standard disinfection treatment (G CHG) and dimethyl sulfoxide (G DMSO) (P>.05). CONCLUSIONS Irradiation with an ultraviolet-C light-emitting diode for 20 minutes decreased the in vitro microbial cell viability on the medical silicone used in facial prostheses.
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Affiliation(s)
- Gabriela Malateaux
- Researcher, UNIP Postgraduation Dental School, Paulista University (UNIP), São Paulo, Brazil.
| | | | | | | | | | - Francisco Perinni Netto
- Researcher, UNIP Postgraduation Dental School, Paulista University (UNIP), São Paulo, Brazil
| | - Cintia Riva Neves
- Researcher, UNIP Postgraduation Dental School, Paulista University (UNIP), São Paulo, Brazil
| | | | | | - Luciano Lauria Dib
- Professor, UNIP Postgraduation Dental School, Paulista University (UNIP), São Paulo, Brazil
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Moufti MA, Hamad M, Al Shawa A, Mardini A, Ghebeh S. Efficacy and design requirements of UV light cabinets for disinfection of exchangeable non-sterilizable "dental objects". Sci Rep 2023; 13:19755. [PMID: 37957167 PMCID: PMC10643671 DOI: 10.1038/s41598-023-45481-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 10/19/2023] [Indexed: 11/15/2023] Open
Abstract
Non-sterilizable items such as prosthodontics items constitute a high risk of transmitting dangerous pathogens, including Coronavirus, between patients and healthcare personnel. Although UV rays are recognized for their germicidal efficacy, large and expensive UV devices previously hindered their adoption in dental offices. During the COVID-19 pandemic, small UV devices became available for domestic use, albeit with varying designs and effectiveness. Our study assesses the disinfection capacity of a UV light cabinet for four dental materials and discusses crucial design features for effective performance. Specimens of each material (silicone impressions, stone cast, acrylic denture base, and indelible pencils) were contaminated with Escherichia coli Bl21, and randomly divided into three study groups: UV device (UVG), impressions disinfection solution (SG), and control (CG). The experiment was repeated thrice, and disinfection efficacy assessed by colony forming units (CFU) count. A 2.5-min UV exposure achieved full disinfection for all materials. Significantly different results were found between groups (p < 0.05, one-way ANOVA, Tukey HSD), except for indelible pencils, where UVG and SG were both highly effective. UV cabinets surpass SG's disinfection efficacy. Compact UV devices can offer affordable, portable, and efficient disinfection for non-sterilizable dental objects, with careful consideration of wavelength, exposure, intensity, and safety.
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Affiliation(s)
- M A Moufti
- College of Dental Medicine, University of Sharjah, P.O.Box 27272, Sharjah, UAE.
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, UAE.
| | - M Hamad
- College of Health Sciences, University of Sharjah, Sharjah, UAE
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, UAE
| | - A Al Shawa
- College of Dental Medicine, University of Sharjah, P.O.Box 27272, Sharjah, UAE
| | - A Mardini
- College of Dental Medicine, University of Sharjah, P.O.Box 27272, Sharjah, UAE
| | - S Ghebeh
- College of Dental Medicine, University of Sharjah, P.O.Box 27272, Sharjah, UAE
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Zappi A, Papazoglou E, Anagnostou M. Is a Wiggling-Motion Modified Two-Step Impression Technique as Accurate as Conventional Techniques in Restorative Dentistry? Dent J (Basel) 2023; 11:dj11050139. [PMID: 37232790 DOI: 10.3390/dj11050139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 05/02/2023] [Accepted: 05/15/2023] [Indexed: 05/27/2023] Open
Abstract
BACKGROUND The purpose of this study was to evaluate dental impression accuracy of one-step and two-step techniques compared to a modified two-step technique. METHODS Four impression techniques were compared: (1) a one-step double mix (DM) technique, (2) a cut-out (CO) technique, in which space relief was created using a blade and a laboratory bur, (3) a membrane (ME) technique, in which space relief was created by placing a PVC membrane on top of the putty material during the primary impression, and (4) a wiggling motion (WI) technique, in which PVC membrane was placed and additional wiggling movements were performed during the first 20 s when the primary impression was seated upon the master model (MM). Impressions were poured with type IV stone. Casts were scanned with a laboratory scanner and measurements were made for each cast using three-dimensional analysis software. RESULTS All groups presented differences compared to MM group, in at least one intra-abutment distance. Groups DM and ME presented the most significant differences, in three and two distances, respectively, whereas CO and WI presented one significant different distance compared to MM. There were no differences between MM and the four techniques for inter-abutment distances. CONCLUSIONS WI yielded similar results with CO technique. Both performed better than the other groups.
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Affiliation(s)
- Anastasia Zappi
- Department of Operative Dentistry, School of Dentistry, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Efstratios Papazoglou
- Department of Operative Dentistry, School of Dentistry, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Maria Anagnostou
- Department of Operative Dentistry, School of Dentistry, National and Kapodistrian University of Athens, 11527 Athens, Greece
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Qiu Y, Xu J, Xu Y, Shi Z, Wang Y, Zhang L, Fu B. Disinfection efficacy of sodium hypochlorite and glutaraldehyde and their effects on the dimensional stability and surface properties of dental impressions: a systematic review. PeerJ 2023; 11:e14868. [PMID: 36846444 PMCID: PMC9948754 DOI: 10.7717/peerj.14868] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/18/2023] [Indexed: 02/22/2023] Open
Abstract
Objective To systematically evaluate the disinfection efficacy of the two most frequently used disinfectants, sodium hypochlorite and glutaraldehyde, and their effects on the surface properties of four different dental impression materials. Methods A systematic literature search was performed in four databases until May 1st, 2022 to select the studies which evaluated disinfection efficacy of disinfectants or surface properties of dental impressions after chemical disinfection. Main results A total of 50 studies were included through electronic database searches. Of these studies, 13 studies evaluated disinfection efficacy of two disinfectants, and 39 studies evaluated their effects on the surface properties of dental impressions. A 10-minute disinfection with 0.5-1% sodium hypochlorite or 2% glutaraldehyde was effective to inactivate oral flora and common oral pathogenic bacteria. With regard to surface properties, chemical disinfection within 30 min could not alter the dimensional stability, detail reproduction and wettability of alginate and polyether impressions. However, the wettability of addition silicone impressions and the dimensional stability of condensation silicone impressions were adversely affected after chemical disinfection, while other surface properties of these two dental impressions were out of significant influence. Conclusions Alginate impressions are strongly recommended to be disinfected with 0.5% sodium hypochlorite using spray disinfection method for 10 min. Meanwhile, elastomeric impressions are strongly recommended to be disinfected with 0.5% sodium hypochlorite or 2% glutaraldehyde using immersion disinfection method for 10 min, however, polyether impression should be disinfected with 2% glutaraldehyde.
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Affiliation(s)
- Yuan Qiu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Dental Materials and Devices for Zhejiang Provincial Engineering Research Center, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Jiawei Xu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Dental Materials and Devices for Zhejiang Provincial Engineering Research Center, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Yuedan Xu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Dental Materials and Devices for Zhejiang Provincial Engineering Research Center, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Zhiwei Shi
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Dental Materials and Devices for Zhejiang Provincial Engineering Research Center, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Yinlin Wang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Dental Materials and Devices for Zhejiang Provincial Engineering Research Center, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Ling Zhang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Dental Materials and Devices for Zhejiang Provincial Engineering Research Center, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Baiping Fu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Dental Materials and Devices for Zhejiang Provincial Engineering Research Center, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
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Effects of Various Disinfection Methods on the Material Properties of Silicone Dental Impressions of Different Types and Viscosities. Int J Mol Sci 2022; 23:ijms231810859. [PMID: 36142778 PMCID: PMC9505442 DOI: 10.3390/ijms231810859] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 09/06/2022] [Accepted: 09/14/2022] [Indexed: 11/16/2022] Open
Abstract
There is an ongoing search for novel disinfection techniques that are not only effective, cheap, and convenient, but that also do not have adverse effects on the properties of dental impressions. We compared the effects of various methods (UVC, gaseous ozone, commercial solution, and spray) on the dimensional change, tensile strength, and hardness of silicone impressions. Moreover, as a secondary aim, we performed a statistical comparison of the properties of nondisinfected addition (Panasil Putty Soft, Panasil monophase Medium, Panasil initial contact Light) and condensation silicones (Zetaplus Putty and Oranwash L), as well as a comparison of materials of various viscosities (putty, medium-bodied, and light-bodied). Our results revealed that addition silicones had higher dimensional stability, tensile strength, and Shore A hardness compared to condensation silicones. Both traditional (immersion and spraying) and alternative methods of disinfection (UVC and ozone) had no significant impact on the tensile properties and dimensional stability of the studied silicones; however, they significantly affected the hardness, particularly of Oranwash L. Our study demonstrated that, similarly to standard liquid disinfectants, both UVC and ozone do not strongly affect the material properties of most silicones. However, before recommendation, their usefulness for each individual material should be thoroughly evaluated.
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Scott R, Joshi LT, McGinn C. Hospital surface disinfection using ultraviolet germicidal irradiation technology: A review. Healthc Technol Lett 2022; 9:25-33. [PMID: 35662749 PMCID: PMC9160814 DOI: 10.1049/htl2.12032] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 04/09/2022] [Accepted: 05/05/2022] [Indexed: 11/19/2022] Open
Abstract
Ultraviolet germicidal irradiation (UVGI) technologies have emerged as a promising alternative to biocides as a means of surface disinfection in hospitals and other healthcare settings. This paper reviews the methods used by researchers and clinicians in deploying and evaluating the efficacy of UVGI technology. The type of UVGI technology used, the clinical setting where the device was deployed, and the methods of environmental testing that the researchers followed are investigated. The findings suggest that clinical UVGI deployments have been growing steadily since 2010 and have increased dramatically since the start of the COVID-19 pandemic. Hardware platforms and operating procedures vary considerably between studies. Most studies measure efficacy of the technology based on the objective measurement of bacterial bioburden reduction; however, studies conducted over longer durations have examined the impact of UVGI on the reduction of healthcare associated infections (HCAIs). Future trends include increased automation and the use of UVGI technologies that are safer for use around people. Although existing evidence seems to support the efficacy of UVGI as a tool capable of reducing HCAIs, more research is needed to measure the magnitude of these effects and to establish recommended best practices.
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Affiliation(s)
- Robert Scott
- Department of Mechanical, Manufacturing, and Biomedical EngineeringTrinity College DublinDublinIreland
| | | | - Conor McGinn
- Department of Mechanical, Manufacturing, and Biomedical EngineeringTrinity College DublinDublinIreland
- Akara RoboticsDublinIreland
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R. Mohd N, Omar RA, Etajuri EA. Dimensional Stability of Elastomeric Impression Material After Disinfection Via Immersion and Microwave Irradiation. Open Dent J 2021. [DOI: 10.2174/1874210602115010658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
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.
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Hsu KL, Balhaddad AA, Martini Garcia I, Collares FM, Dhar V, DePaola L, Melo MA. 3D cone-beam C.T. imaging used to determine the effect of disinfection protocols on the dimensional stability of full arch impressions. Saudi Dent J 2021; 33:453-461. [PMID: 34803286 PMCID: PMC8589573 DOI: 10.1016/j.sdentj.2020.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 11/12/2020] [Accepted: 12/01/2020] [Indexed: 11/23/2022] Open
Abstract
Cone-beam computed tomography assessed the dimensional stability of impressions. The two common impression materials: alginate or polyvinylsiloxane were evaluated. Five commercial disinfectant agents were tested on materials’ stability. All disinfectant agents did not affect materials’ stability.
Aim This study aimed to investigate the dimensional stability of irreversible hydrocolloid and polyvinylsiloxane (P.V.S.) impressions after exposure to four commercial disinfectants using cone-beam computed tomography (CBCT). Materials and Methods Two different impression materials were tested: irreversible hydrocolloid and P.V.S. Four disinfection solutions were applied: BirexSE, Opti-Cide3, COEfect MinuteSpray, and CaviCide Spray. Distilled water was used as a control group. Each solution remained in contact with the impression for 5 min. Additional contact time of 5 min compromises time for scanning. The materials were evaluated for dimensional stability after the impression of a maxillary complete edentulous template via CBCT before and after being in contact with the disinfectant agents. Measurements were assessed on the digital models from A-B, B-C, and C-A points. Paired analyses (Wilcoxon Signed Rank test or paired Student's t-test) were used to analyze each measurement before and after the contact with the disinfectant agents. The variance for each measurement was also analyzed via a one-way analysis of variance or Kruskal-Wallis. Results Overall, there were no statistical differences among the points measurements in the irreversible hydrocolloid or P.V.S. between initial and final assessments (p > 0.05). The used disinfectant agents in this study did not influence each measurement's variation on irreversible hydrocolloid or P.V.S. (p > 0.05). All agents showed an effect on the dimensional stability of both impression materials. The differences in the three dimensions ranged between 0.34 and 1.54%. Conclusion Within 10 min of removing the impression from the master cast, is study's findings indicated that the four commercially available disinfectants did not influence the dimensional stability of irreversible hydrocolloid or P.V.S. Further studies should be performed to elucidate the antimicrobial effect of these solutions applied as a spray on the surface of irreversible hydrocolloid and P.V.S. impressions.
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Affiliation(s)
- Kuei-Ling Hsu
- University of Maryland School of Dentistry, Baltimore, MD 21201, USA.,Department of Orthodontics and Pediatric Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Abdulrahman A Balhaddad
- University of Maryland School of Dentistry, Baltimore, MD 21201, USA.,Department of Restorative Dental Sciences, Imam Abdulrahman Bin Faisal University, College of Dentistry, Dammam, Saudi Arabia
| | - Isadora Martini Garcia
- University of Maryland School of Dentistry, Baltimore, MD 21201, USA.,Department of Dental Materials, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre 90035-003, RS, Brazil
| | - Fabrício Mezzomo Collares
- Department of Dental Materials, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre 90035-003, RS, Brazil
| | - Vineet Dhar
- Department of Orthodontics and Pediatric Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Louis DePaola
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Mary Anne Melo
- University of Maryland School of Dentistry, Baltimore, MD 21201, USA.,Division of Operative Dentistry, Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
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Kavita K, Reddy KRP, Reddy KRM, Kumar S, Pandey G, Singh R. Assessment of Effect of Different Sterilization Agents on Dimensional Accuracy of Different Impression Materials in Implant Prosthesis - An In vitro Study. J Pharm Bioallied Sci 2021; 13:S1620-S1623. [PMID: 35018041 PMCID: PMC8686873 DOI: 10.4103/jpbs.jpbs_315_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 05/09/2021] [Indexed: 11/04/2022] Open
Abstract
AIM Sterilization of impression materials is of paramount importance. The present study was conducted to compare the effect of different disinfectants on dimensional accuracy of elastomeric impression materials used for implant prosthesis and other routine treatments. MATERIALS AND METHODS The present study was conducted with polyvinyl siloxane (PVS) (regular body), PVS (medium body), PVS (heavy body), and polyether (medium body) impression materials. Glutaraldehyde (2%) and sodium hypochlorite (NaOCl, 0.525%) were the disinfectant solutions employed in the study. After 16 h, the specimens were measured under Leica WILD stereomicroscope and dimensions were compared with master die. RESULTS The dimensional change in the Controls, 2% glutaraldehyde (Group I), and 0.525% NaOCl (Group II) was non significant where as Group III and Group IV showed statistically significant difference (P < 0.05). Results also showed significantly higher tear strength (newton/millimeter) in Control group followed by Group I and Group II. CONCLUSION PVS (heavy body) was found to be most stable, and polyether was seen to be stable of all the impression materials.
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Affiliation(s)
- Kumari Kavita
- Department of Dentistry, Nalanda Medical College and Hospital, Patna, Bihar, India
| | - K. R. Parameshwar Reddy
- Department of Oral and Maxillofacial Surgery, Malla Reddy Institute of Dental Sciences, Hyderabad, Telangana, India,Address for correspondence: Dr. K. R. Parameshwar Reddy, Department of Oral and Maxillofacial Surgery, Malla Reddy Institute of Dental Sciences, Jeedimetla, Hyderabad, Telangana, India. E-mail:
| | | | - Swatantra Kumar
- Department of Prosthodontics, Crown Bridge and Implantology, Awadh Dental College and Hospital, Jamshedpur, Jharkhand, India
| | - Gyanendra Pandey
- Department of Oral Medicine Radiology and Diagnosis, Purvanchal institute of Dental Sciences, Gorakhpur, Uttar Pradesh, India
| | - Revati Singh
- Department of Dentistry, Patna Medical College and Hospital, Patna, Bihar, India
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Kotwal M, Singh VP, Mushtaq H, Ahmed R, Rai G, Kumar A. Disinfection of Impression Materials with Glutaraldehyde, Ultraviolet Radiation, and Autoclave: A Comparative Study. J Pharm Bioallied Sci 2021; 13:S289-S292. [PMID: 34447095 PMCID: PMC8375875 DOI: 10.4103/jpbs.jpbs_755_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 11/23/2020] [Indexed: 11/25/2022] Open
Abstract
Background: The present study was conducted to compare various methods of disinfection of impression materials such as glutaraldehyde, ultraviolet (UV) radiation, and autoclave. Materials and Methods: The present study was conducted on eighty alginate impression materials which were disinfectant with 2.2% glutaraldehyde, UV radiation, and autoclave. The pre- and postbacterial count was assessed. Results: The mean premicrobial contamination in Group I was 362.2 106 colony-forming unit (CFU)/ml, in Group II was 306.4 106 CFU/ml, and in Group III was 336.2 106 CFU/ml. The mean postmicrobial contamination in Group I was 65.2 106 CFU/ml, in Group II was 76.7 106 CFU/ml, and in Group III was 28.4 106 CFU/ml. Conclusion: The authors found that autoclave proved to be better in terms of reduction in bacterial colonies as compared to glutaraldehyde and UV radiation.
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Affiliation(s)
- Monica Kotwal
- Department of Prosthodontics, Indira Gandhi Government Dental College, Jammu, Jammu and Kashmir, India
| | | | - Humaira Mushtaq
- Private Practitioner, Rehari, Jammu, Jammu and Kashmir, India
| | - Rimsha Ahmed
- Department of Prosthodontics, Indira Gandhi Government Dental College, Jammu, Jammu and Kashmir, India
| | - Gaurav Rai
- Department of Oral and Maxillofacial Surgery, Buddha Institute of Dental Sciences and Hospital Kankarbagh, Patna, Bihar, India
| | - Amit Kumar
- Private Practitioner Varanasi, Uttar Pradesh, India
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Malateaux G, Salazar-Gamarra R, de Souza Silva J, Gallego Arias Pecorari V, Suffredini IB, Dib LL. Ultraviolet C as a method of disinfecting medical silicone used in facial prostheses: An in vitro study. J Prosthet Dent 2021; 126:452.e1-452.e6. [PMID: 34301417 DOI: 10.1016/j.prosdent.2021.06.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 06/20/2021] [Accepted: 06/21/2021] [Indexed: 10/20/2022]
Abstract
STATEMENT OF PROBLEM Hygiene and disinfection are important factors for preserving facial prostheses and supporting tissue health. However, a method that does not accelerate degradation or color change is necessary. PURPOSE The purpose of this in vitro study was to evaluate the effectiveness of irradiation with ultraviolet C light-emitting diode (UV-C LED) light in the disinfection and initial color stability of the silicone (A-588-1; Factor II) used in facial prostheses. MATERIAL AND METHODS One hundred and twenty specimens were made, contaminated by multispecies biofilm, and divided into 5 groups (n = 24) with different treatments: control, distilled water, 0.12% chlorhexidine, UV-C LED light, and dimethyl sulfoxide (DMSO) as the negative control. Cell viability was measured by the methyl tetrazolium salt method. Statistical analysis was performed by generalized linear models. Additional descriptive analysis was performed for color analysis by using 16 silicone specimens made with light and dark intrinsic coloring in 4 groups (controls and treatments n=4) submitted to UV-C LED light. The ΔE of the specimens was obtained by CIEDE200. RESULTS The results of cell viability demonstrated a statistically significant difference among the groups (P<.001), with a microbial reduction after UVC-LED exposure compared with the control group. Regarding the color, the groups presented an average ΔE (light 0.205 and dark 0.308) compatible with visually imperceptible changes (light < 0.7 and dark < 1.2). CONCLUSIONS Irradiation with UV-C LED light decreased the in vitro microbial cell viability of the medical silicone used in facial prostheses, demonstrating initial color stability.
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Affiliation(s)
- Gabriela Malateaux
- Researcher, UNIP Postgraduation Dental School, Paulista University (UNIP), São Paulo, SP, Brazil.
| | - Rodrigo Salazar-Gamarra
- Researcher, UNIP Postgraduation Dental School, Paulista University (UNIP), São Paulo, SP, Brazil
| | - Jefferson de Souza Silva
- Researcher, Center for Research in Biodiversity, Paulista University (UNIP), São Paulo, SP, Brazil
| | - Vanessa Gallego Arias Pecorari
- Professor, Bioestatistic Department, UNIP Postgraduation Dental School, Paulista University (UNIP), São Paulo, SP, Brazil
| | | | - Luciano Lauria Dib
- Professor, UNIP Postgraduation Dental School, Paulista University (UNIP), São Paulo, SP, Brazil
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Al-Aali K, Binalrimal S, AlShedokhi A, Al Saqer E, AlHumaid M. Infection control awareness level among dental laboratory technicians, Riyadh, Saudi Arabia. J Family Med Prim Care 2021; 10:1540-1546. [PMID: 34123889 PMCID: PMC8144774 DOI: 10.4103/jfmpc.jfmpc_2258_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/24/2020] [Accepted: 01/15/2021] [Indexed: 11/20/2022] Open
Abstract
Aims and objectives: Infection control is an essential part in dental practices. Potential disease transmission in the dental lab is well documented. Dental technicians should strictly adhere to the standard precautions in order to prevent potential risks of cross-contamination, thereby producing a safe environment for patients and staff. The aim of this study was to evaluate the knowledge, attitude, and practice among dental lab technicians toward infection control protocols at the dental laboratories of Riyadh. Materials and methods: A self-administered questionnaire will be distributed to dental lab technicians working at both private and governmental laboratories in Riyadh, Saudi Arabia. Data were collected from one hundred and twenty-one dental laboratory technicians. Results: According to the findings, only 42.9% had an infection control manual display in the dental lab, 43.8% had received infection control training courses as part of their orientation, 40.4% of the technicians had a valid hepatitis B vaccination. Dental technicians are exposed to high risk of injuries, 72.7% of respondents answered Yes, when they were asked about reporting sharp injuries to laboratory administration. Conclusion: There was poor compliance to infection control procedures, dental techniques are at increased risk of cross-contamination and infection, they have limited orientation and knowledge on the infection control guideline and policy.
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Affiliation(s)
- Khulud Al-Aali
- Department of Clinical Dental Science, College of Dentistry, PNU, Riyadh, Saudi Arabia
| | | | | | - Ebtihal Al Saqer
- General Dentist, College of Dentistry, PNU, Riyadh, Saudi Arabia
| | - Masheal AlHumaid
- General Dentist, College of Dentistry, PNU, Riyadh, Saudi Arabia
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Improved water absorption behaviour of experimental hydrophilic vinyl polysiloxane (VPS) impression materials incorporating a crosslinking agent and a novel surfactant. Dent Mater 2021; 37:1054-1065. [PMID: 33888340 DOI: 10.1016/j.dental.2021.03.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 03/01/2021] [Accepted: 03/29/2021] [Indexed: 11/24/2022]
Abstract
OBJECTIVES To study the effects of incorporating a further crosslinking agent and a novel surfactant on the water absorption behaviour of experimental VPS impression materials. METHODS Part 1: The water uptake behaviour of Aquasil-Ultra-Monophase (AqM) was studied gravimetrically in three media (DW, 1%NaOCl and Perform ID), at 23 °C and 37 °C, over a period of one and four-months (n = 5) to gain information on long-term immersion. Part 2: Five experimental materials were formulated: Exp-I and II as hydrophobic and Exp-III-V as hydrophilic, containing an additional cross-linking agent (TFDMSOS) and Rhodasurf CET-2 surfactant. Their water uptake and desorption (both at 23 °C) properties (gravemetrically), solubility, pH and diffusion coefficient (DC) data were compared with three commercial, hydrophilic VPS impression materials, over seven days (n = 5). The results were analysed statistically. RESULTS Part 1: Significant differences in water absorbed by AqM were observed in the three media at 23 °C. Aq M had a significantly higher uptake in 2% Perform ID, than in DW and NaOCl. At 37 °C, over four-months the uptake profiles were more enhanced and differed. Part 2: All Exp and commercial materials significantly increased in weight in both media (DW and 1% NaOCl at 23 °C), with differing uptake profiles and non-reached equilibrium. Exp-VPS absorbed significantly less water than commercial-VPS. Desorption of all VPS from both parts was faster than absorption, followed Fickian diffusion kinetics and reached equilibrium within 1-3 days. Desorption DCs for Exp-VPS were higher than commercial materials (10-10 versus 10-11 m2 s-1). The solubility was higher in 1% NaOCl compared to DW. The pH of DW after immersion of samples significantly increased compared to 1% NaOCl. SIGNIFICANCE The incorporation of novel cross-linking agent, TFDMSOS and non-ionic surfactant, Rhodasurf CET-2, (ethoxylated-cetyl-oleyl alcohol) improved the dimensional stability of hydrophilic Exp-VPS in DW and 1% NaOCl. These materials merit further research in producing accurate casts of the patient's anatomy following disinfection.
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Asopa SJ, Padiyar UN, Verma S, Suri P, Somayaji NS, Radhakrishnan IC. Effect of heat sterilization and chemical method of sterilization on the polyvinyl siloxane impression material. A comparative study. J Family Med Prim Care 2020; 9:1348-1353. [PMID: 32509614 PMCID: PMC7266257 DOI: 10.4103/jfmpc.jfmpc_1122_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Revised: 02/19/2020] [Accepted: 03/02/2020] [Indexed: 11/17/2022] Open
Abstract
Background: Dental impression is a crucial part of the process of constructing a well-fitting prosthesis. In the clinical scenario, impressions can act as a vehicle for the transfer of bacteria and fungi. Therefore, an attempt was made to evaluate the dimensional accuracy of the newly introduced polyvinyl siloxane (PVS) impression material upon autoclaving and comparing it to the traditional means of chemical disinfection. Materials and Methods: A cross-sectional comparative in vitro study was conducted. Three groups were made for testing different sterilization methods. The sample size for the study was kept as 30 observations in each of the three groups. Test samples were prepared by making an impression of the die using the putty-wash technique. Statistical analysis was done by applying unpaired t-test, paired t-test, one-way analysis of variance (ANOVA) and post hoc Tukey's honestly significant difference (HSD). Results: Initial mean of samples of group I were compared to A (actual measurement of metal ruled block = 24.960), a dimensional change of 1.6% was found. Similarly, in group II, a change of 1.59% was found and in group III the change was 1.7%. There was mean shrinkage of 24.557 mm in group I, 24.586 mm in group II, and 24.535 mm in group III and these changes were found statistically significant. Conclusion: Dimensional changes in the impression material after disinfection with 2% glutaraldehyde were considered high compared to autoclaving and, hence, it may not be advisable to disinfect this material with 2% glutaraldehyde.
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Affiliation(s)
- Swati Joshi Asopa
- Reader, Department of Prosthodontics, Crown and Bridge, Rajasthan Dental College and Hospital, Jaipur, Rajasthan, India
| | - U Narendra Padiyar
- Professor and Dean, Department of Prosthodontics, Crown and Bridge, Mahatma Gandhi Dental College and Hospital, Jaipur, Rajasthan, India
| | - Sumit Verma
- Senior Lecturer, Department of Oral and Maxillofacial Surgery, Dr. B.R Ambedkar Institute of Dental Sciences and Hospital, Patna, Bihar, India
| | - Prerna Suri
- Private Practitioner and Consultant Orthodontist, Mumbai, Maharashtra, India
| | - Nagaveni S Somayaji
- Reader, Department of Prosthodontics, Crown and Bridge, Hi-Tech Dental College and Hospital, Bhubaneswar, Odisha, India
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Marin E, Boschetto F, Sunthar TPM, Zanocco M, Ohgitani E, Zhu W, Pezzotti G. Antibacterial effects of barium titanate reinforced polyvinyl-siloxane scaffolds. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1725757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Elia Marin
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Kyoto, Japan
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Francesco Boschetto
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Kyoto, Japan
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | | | - Matteo Zanocco
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Kyoto, Japan
| | - Eriko Ohgitani
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Wenliang Zhu
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Kyoto, Japan
| | - Giuseppe Pezzotti
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Kyoto, Japan
- Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Department of Orthopedic Surgery, Tokyo Medical University, Tokyo, Japan
- The Center for Advanced Medical Engineering and Informatics, Osaka University, Osaka, Japan
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Effect of chemical, microwave irradiation, steam autoclave, ultraviolet light radiation, ozone and electrolyzed oxidizing water disinfection on properties of impression materials: A systematic review and meta-analysis study. Saudi Dent J 2019; 32:161-170. [PMID: 32405219 PMCID: PMC7211894 DOI: 10.1016/j.sdentj.2019.12.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/05/2019] [Accepted: 12/15/2019] [Indexed: 11/30/2022] Open
Abstract
Objectives The objective of this systematic review and meta-analysis study was to identify the different disinfection methods and materials and the existing evidence on their effect on properties of the different impression materials. Material and methods An electronic search of MEDLINE (PubMed), Science Direct, and Google Scholar databases was performed to retrieve related English-language articles published between January 2000 and July 2019. Available studies with search terms such as: Impression disinfection, disinfection method, impression dimensional stability and impression wettability were used. The selected articles were reviewed by screening their titles and abstracts and full text. Finally, a total of 70 articles were considered relevant and were included in this study. Results Extensive studies were conducted to determine the effect of the different disinfection methods and materials on the properties of the different impression materials such as dimensional stability, wettability and surface roughness. While some studies reported significant changes in the properties of the impression materials, others reported either no changes or minor insignificant effects. Conclusions Some studies reported significant changes in the properties of the impression materials as a result of using different disinfection methods, whereas others reported either minor insignificant or no changes. Although the findings of the studies were controversial, care should be taken to avoid distortion of impressions and loss of their surface details that can adversely affect the fitting accuracy of the restorations. Therefore, better designed and standardized studies are needed to evaluate the effect of different commonly used disinfectants on properties of impression materials. Moreover, manufacturers should be encouraged to recommend specific disinfection methods and materials for disinfecting the impression materials to ensure their optimal accuracy.
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