1
|
Xue Y, Tang Y, Ren Z, Linke L, Liu Y, Xie J. Association between blood ethylene oxide levels and the prevalence of periodontitis: evidence from NHANES 2013-2014. Clin Oral Investig 2024; 28:293. [PMID: 38695956 DOI: 10.1007/s00784-024-05690-7] [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: 10/07/2023] [Accepted: 04/24/2024] [Indexed: 05/28/2024]
Abstract
BACKGROUND The study aimed to establish a link between blood ethylene oxide (EO) levels and periodontitis, given the growing concern about EO's detrimental health effects. MATERIALS AND METHODS The study included 1006 adults from the 2013-2014 National Health and Nutrition Examination Survey (NHANES) dataset. We assessed periodontitis prevalence across groups, used weighted binary logistic regression and restricted cubic spline fitting for HbEO-periodontitis association, and employed Receiver Operating Characteristic (ROC) curves for prediction. RESULTS In the periodontitis group, HbEO levels were significantly higher (40.57 vs. 28.87 pmol/g Hb, P < 0.001). The highest HbEO quartile showed increased periodontitis risk (OR = 2.88, 95% CI: 1.31, 6.31, P = 0.01). A "J"-shaped nonlinear HbEO-periodontitis relationship existed (NL-P value = 0.0116), with an inflection point at ln-HbEO = 2.96 (EO = 19.30 pmol/g Hb). Beyond this, ln-HbEO correlated with higher periodontitis risk. A predictive model incorporating sex, age, education, poverty income ratio, alcohol consumption, and HbEO had 69.9% sensitivity and 69.2% specificity. The model achieved an area under the ROC curve of 0.761. CONCLUSIONS These findings suggest a correlation between HbEO levels and an increased susceptibility to periodontitis.
Collapse
Affiliation(s)
- Yan Xue
- Department of Pediatrics, The Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, Sichuan, China
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Medical Research Center, The Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, Sichuan, China
| | - Yujing Tang
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Center of Gastrointestinal and Minimally Invasive Surgery, Department of General Surgery, The Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, Sichuan, 610031, China
- Medical Research Center, The Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, Sichuan, China
| | - Zhengyun Ren
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Center of Gastrointestinal and Minimally Invasive Surgery, Department of General Surgery, The Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, Sichuan, 610031, China
- Medical Research Center, The Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, Sichuan, China
| | - Li Linke
- Department of Pediatrics, The Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, Sichuan, China
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Medical Research Center, The Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, Sichuan, China
| | - Yanjun Liu
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China.
- Center of Gastrointestinal and Minimally Invasive Surgery, Department of General Surgery, The Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, Sichuan, 610031, China.
- The Third People's Hospital of Chengdu, Sichuan, 610031, China.
| | - Jiang Xie
- Department of Pediatrics, The Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, Sichuan, China.
- The Third People's Hospital of Chengdu, Sichuan, 610031, China.
| |
Collapse
|
2
|
Bhandari SS, Palin W, Kuehne SA, Camilleri J. Investigating best practice for specimen preparation for biological testing of root canal sealers. Dent Mater 2024; 40:387-392. [PMID: 38103958 DOI: 10.1016/j.dental.2023.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 11/30/2023] [Accepted: 12/08/2023] [Indexed: 12/19/2023]
Abstract
INTRODUCTION Biological characterization of root canal sealers is important as it assesses the ability of the root canal sealer to exert antimicrobial properties thus avoiding treatment failures caused by microbial challenge and also assess the cytotoxic effect on the periapical tissues. Assessment of the biological testing of root canal sealers necessitates the sterilisation of the materials prior to evaluation. This study aims to analyse the influence of various sterilisation techniques conducted prior to biological testing on the microstructure and surface properties of endodontic sealers. Assessment of the initial microbial contamination on the material was also undertaken. METHODS Four commercial sealers were investigated. The sealers were either prepared in a laminar flow cabinet or on a laboratory bench top under ambient conditions. Each group was further divided into 5 groups (n = 3) based on the sterilization technique:1) ethanol-10 mins, 2) ultraviolet-1 h, 3) ethanol-10 mins + ultraviolet-1 h, 4) autoclave, and 5) no sterilisation (control). Microbial levels in the materials were assessed by plate streaking technique. The materials were characterized by scanning electron microscopy and energy dispersive spectroscopy, and Fourier transform infrared spectroscopy, before and after sterilisation, to assess any changes in microstructure and chemical composition. RESULTS All the materials did not exhibit contamination when prepared in laminar flow chamber in sterile conditions compared with sealers prepared on the bench top. Three of the commercial materials showed changes in microstructure while one (TotalFill) was not affected by the sterilisation. AH Plus and BioRoot RCS exhibited alterations in water and alcohol peaks in FT-IR while the single syringe sealers (TotalFill and BioRoot Flow) showed no changes. CONCLUSIONS Sterilisation methods cause physical and chemical alterations to sealers. Material preparation should be performed in a laminar flow cabinet and a test for sterility should be performed prior to any biological testing being undertaken. If the materials are not sterile, assessment of the effects of the sterilization methods is recommended.
Collapse
Affiliation(s)
- Sweta Surana Bhandari
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - William Palin
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Sarah A Kuehne
- Nottingham Trent University, School of Science and Technology, Nottingham, United Kingdom
| | - Josette Camilleri
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom.
| |
Collapse
|
3
|
Ayub A, Cheong YK, Castro JC, Cumberlege O, Chrysanthou A. Use of Hydrogen Peroxide Vapour for Microbiological Disinfection in Hospital Environments: A Review. Bioengineering (Basel) 2024; 11:205. [PMID: 38534479 DOI: 10.3390/bioengineering11030205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/14/2024] [Accepted: 02/19/2024] [Indexed: 03/28/2024] Open
Abstract
Disinfection of nosocomial pathogens in hospitals is crucial to combat healthcare-acquired infections, which can be acquired by patients, visitors and healthcare workers. However, the presence of a wide range of pathogens and biofilms, combined with the indiscriminate use of antibiotics, presents infection control teams in healthcare facilities with ongoing challenges in the selection of biocides and application methods. This necessitates the development of biocides and innovative disinfection methods that overcome the shortcomings of conventional methods. This comprehensive review finds the use of hydrogen peroxide vapour to be a superior alternative to conventional methods. Motivated by observations in previous studies, herein, we provide a comprehensive overview on the utilisation of hydrogen peroxide vapour as a superior high-level disinfection alternative in hospital settings. This review finds hydrogen peroxide vapour to be very close to an ideal disinfectant due to its proven efficacy against a wide range of microorganisms, safety to use, lack of toxicity concerns and good material compatibility. The superiority of hydrogen peroxide vapour was recently demonstrated in the case of decontamination of N95/FFP2 masks for reuse to address the critical shortage caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) during the COVID-19 pandemic. Despite the significant number of studies demonstrating antimicrobial activity, there remains a need to critically understand the mechanism of action by performing studies that simultaneously measure damage to all bacterial cell components and assess the correlation of this damage with a reduction in viable cell count. This can lead to improvement in antimicrobial efficacy and foster the development of superior approaches.
Collapse
Affiliation(s)
- Aaqib Ayub
- School of Physics, Engineering and Computer Science, University of Hertfordshire, Hatfield AL10 9AB, UK
| | - Yuen Ki Cheong
- School of Physics, Engineering and Computer Science, University of Hertfordshire, Hatfield AL10 9AB, UK
| | - Jesus Calvo Castro
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK
| | | | - Andreas Chrysanthou
- School of Physics, Engineering and Computer Science, University of Hertfordshire, Hatfield AL10 9AB, UK
| |
Collapse
|
4
|
Crocker DB, Hoffman I, Carter JL, Akkus O, Rimnac CM. Fatigue crack propagation and fracture toughness of cortical bone are radiation dose-dependent. J Orthop Res 2023; 41:823-833. [PMID: 35949192 PMCID: PMC9911555 DOI: 10.1002/jor.25424] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 07/08/2022] [Accepted: 08/09/2022] [Indexed: 02/04/2023]
Abstract
Cortical bone allograft sterilized with a standard γ-radiation dose of 25-35kGy has demonstrated reduced static and cyclic fracture resistance compared with unirradiated bone. To mitigate radiation damage, we recently observed a dose-dependent response of high-cycle fatigue behavior of human cortical bone from 0 to 25 kGy, with lower doses exhibiting logarithmically longer fatigue lives. The objectives of this study were as follows: (1) to determine whether fracture toughness, work-to-fracture, and fatigue crack propagation resistance of human cortical bone are also radiation dose-dependent, and (2) to determine the associations of radiation dose and a Raman biomarker for collagen disorder with fracture properties. Compact tension specimens were machined from two donor femoral pairs and allocated to four treatment groups: 0 (unirradiated control), 10, 17.5, and 25 kGy. Fracture toughness specimens were monotonically loaded to failure and the critical stress intensity factor (KC ) was determined. Work-to-fracture was calculated from the load versus displacement integral up to fracture. Fatigue crack propagation specimens were cyclically loaded under constant room-temperature irrigation and fatigue crack growth rate (da/dN) and cyclic stress intensity (∆K) were calculated. Fracture toughness, work-to-fracture, and fatigue crack propagation resistance decreased 18%, 33%, and 15-fold from 0 to 25 kGy, respectively (p < 0.05). Radiation dose was more predictive of fracture properties than collagen disorder. These findings support that quasi-static and fatigue fracture properties of cortical bone are radiation dose-dependent within this dose range. The structural alterations arising from irradiation that cause these losses in fracture resistance remain to be elucidated.
Collapse
Affiliation(s)
- Dylan B. Crocker
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH
| | - Isaac Hoffman
- Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, OH
| | - Jennifer L.W. Carter
- Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, OH
| | - Ozan Akkus
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH
- Department of Orthopaedic Surgery, Case Western Reserve University, Cleveland, OH
| | - Clare M. Rimnac
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH
- Department of Orthopaedic Surgery, Case Western Reserve University, Cleveland, OH
| |
Collapse
|
5
|
Afshari T. First-Principles Studies of Ethylene Oxide Adsorption on Pristine and Doped Graphenes. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422130192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
6
|
Gumru B, Tarcin B, Idman E. Cross-contamination and infection control in intraoral digital imaging: a comprehensive review. Oral Radiol 2020; 37:180-188. [PMID: 32506213 DOI: 10.1007/s11282-020-00452-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 05/28/2020] [Indexed: 11/27/2022]
Abstract
Dental health care workers are subjected to various infectious disease agents that are present in patients' saliva and blood which make infection control and universal prevention methods indispensable to the dental practice given that some of these diseases cause loss of work and time for dental staff and patients; some of them cause serious morbidity; and some of them currently have a poor prognosis and no effective treatments. Although dental radiographic procedures are not invasive, and there are no incidents such as injuries caused by dental instruments, they are a potential infection source because of contamination with saliva and blood, and comprehensive infection control procedures also apply to the radiology clinic. In addition, contact with a large number of patients in dental schools and clinics in a short period of time, and the fact that radiographic procedures are performed in the same environment as other dental procedures in dental offices increase the significance of infection control in dental radiology. Major advances in computer technology have enabled digital imaging systems to develop rapidly and to become common in dental practice as an alternative to conventional film-based imaging. The use of digital sensors in dental radiology introduced unique infection control challenges and required the revision and modification of existing infection control techniques. In this review, studies concerning the risk of cross-contamination and challenges of infection control with digital image sensors are comprehensively reviewed and infection control protocols that should be followed in intraoral digital imaging using both direct and indirect systems are thoroughly examined.
Collapse
Affiliation(s)
- Birsay Gumru
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Marmara University, Basibuyuk Mah. Basibuyuk Yolu Sok. No: 9/3, Basibuyuk, 34854, Maltepe/Istanbul, Turkey.
| | - Bilge Tarcin
- Department of Restorative Dentistry, Faculty of Dentistry, Marmara University, Basibuyuk Mah. Basibuyuk Yolu Sok. No: 9/3, Basibuyuk, 34854, Maltepe/Istanbul, Turkey
| | - Ender Idman
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Marmara University, Basibuyuk Mah. Basibuyuk Yolu Sok. No: 9/3, Basibuyuk, 34854, Maltepe/Istanbul, Turkey
| |
Collapse
|
7
|
Afshari T, Mohsennia M. Effect of the Si, Al and B doping on the sensing behaviour of carbon nanotubes toward ethylene oxide: a computational study. MOLECULAR SIMULATION 2019. [DOI: 10.1080/08927022.2019.1635693] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Tooba Afshari
- Department of Chemistry, University of Kashan, Kashan, Iran
| | - Mohsen Mohsennia
- Department of Chemistry, University of Kashan, Kashan, Iran
- Institute of Nano science and Nanotechnology, University of Kashan, Kashan, Iran
| |
Collapse
|
8
|
Durham ME, Elfenbein JR. Evaluation of vaporized hydrogen peroxide sterilization on the in vitro efficacy of meropenem-impregnated polymethyl methacrylate beads. Am J Vet Res 2019; 80:45-50. [PMID: 30605028 DOI: 10.2460/ajvr.80.1.45] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate the effects of vaporized hydrogen peroxide (VHP) sterilization on the in vitro antimicrobial efficacy of meropenem-impregnated polymethyl methacrylate (M-PMMA) beads. SAMPLE 6-mm-diameter polymethyl methacrylate beads that were or were not impregnated with meropenem. PROCEDURES Meropenem-free polymethyl methacrylate and M-PMMA beads were sterilized by use of an autoclave or VHP or remained unsterilized. To determine the antimicrobial efficacy of each bead-sterilization combination (treatment), Mueller-Hinton agar plates were inoculated with 1 of 6 common equine pathogens, and 1 bead from each treatment was applied to a sixth of each plate. The zone of bacterial inhibition for each treatment was measured after 24 hours. To estimate the duration of antimicrobial elution into a solid or liquid medium, 1 bead from each treatment was transferred every 24 hours to a new Staphylococcus aureus-inoculated agar plate or a tube with PBS solution, and an aliquot of the eluent from each tube was then applied to a paper disc on an S aureus-inoculated agar plate. All agar plates were incubated for 24 hours, and the zone of bacterial inhibition was measured for each treatment. RESULTS In vitro antimicrobial efficacy of M-PMMA beads was retained following VHP sterilization. The duration of antimicrobial elution in solid and liquid media did not differ significantly between unsterilized and VHP-sterilized M-PMMA beads. CONCLUSIONS AND CLINICAL RELEVANCE Results indicated that M-PMMA beads retained in vitro antimicrobial activity and eluted the drug for up to 2 weeks after VHP sterilization.
Collapse
|
9
|
Afshari T, Mohsennia M. Effect of external electric field on the adsorption of ethylene oxide on pristine and Al-doped coronenes: A DFT study. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2018. [DOI: 10.1142/s0219633618500323] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The adsorption interactions between ethylene oxide (EO) molecule and pristine and aluminum-doped coronene (Al-coronene) were studied in the presence and absence of perpendicular external electric fields (EFs) with strengths [Formula: see text], [Formula: see text] and [Formula: see text] a.u. using density functional theory (DFT) calculations. The geometry optimizations and adsorption calculations were carried out by employing 6-31[Formula: see text]G** basis set. The changes in geometric and electronic structures after the adsorption were investigated to characterize the sensitivity of pristine and Al-coronene toward EO molecules. For all the studied systems, adsorption energies ([Formula: see text], band gap energy ([Formula: see text], Mulliken charge transfer, molecular electrostatic potential (MEP) and density of electron state (DOS) were calculated and discussed. According to the obtained results, the high impact of the applied EFs on the adsorption characteristics of EO molecules on the pristine and Al-doped coronenes showed that applying EF is a good strategy for enhancing the EO adsorption capability of the pristine and Al-doped coronenes, improving the potential application of coronene-based sensors for detection of EO in trace amounts.
Collapse
Affiliation(s)
- Tooba Afshari
- Department of Chemistry, University of Kashan, Kashan, Iran
| | - Mohsen Mohsennia
- Department of Chemistry, University of Kashan, Kashan, Iran
- Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran
| |
Collapse
|
10
|
Peker I, Peker E, Basman A, Akca G, Odabas ME, Haciosmanoglu N, Altunkaynak B, Akarslan Z. A pilot study of the effects of a vacuum sealing barrier method for photostimulable phosphor plates regarding plate damage and prevention of microbiologic cross-contamination. Oral Surg Oral Med Oral Pathol Oral Radiol 2018; 126:283-290. [PMID: 29958935 DOI: 10.1016/j.oooo.2018.05.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 05/07/2018] [Accepted: 05/16/2018] [Indexed: 10/16/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the effectiveness of a new sealing method for preventing cross-contamination of photostimulable phosphor (PSP) plates. STUDY DESIGN Twelve new PSP plates were divided into 3 groups (PSP-a, PSP-b, and PSP- c) and placed in 3 different barriers (2 different brands of envelopes and a vacuum sealing method). All plates were exposed to X-rays with an aluminum step wedge, and the images were evaluated for the presence of any artifacts. After radiography, the PSP plates were removed from the barriers. The barriers and the PSP plates were disinfected and culture performed to assess any microorganism burden. Subsequently, the PSP plates were coated again with all barriers. The barriers were then contaminated and microbiologic specimens were collected. Subsequently, the barriers were wiped with alcohol. The PSP plates were removed, and microbiologic specimens were obtained. RESULTS No artifacts were recorded on the radiographic images on the sensors in any group. Microorganisms were detected on the PSP plates placed in envelopes. No colonization of microorganisms was detected on the vacuum sealed PSP plates. CONCLUSIONS The new vacuum-sealing method may be useful in preventing cross-contamination of PSP plates during radiographic procedures.
Collapse
Affiliation(s)
- Ilkay Peker
- Gazi University Faculty of Dentistry, Department of Dentomaxillofacial Radiology, Ankara, Turkey.
| | | | - Adil Basman
- Gazi University Faculty of Dentistry, Department of Periodontology, Ankara, Turkey
| | - Gulcin Akca
- Gazi University Faculty of Dentistry, Department of Microbiology, Ankara, Turkey
| | - Mesut Enes Odabas
- Gazi University Faculty of Dentistry, Department of Pedodontics, Ankara, Turkey
| | - Nur Haciosmanoglu
- Gazi University Faculty of Dentistry, Department of Dentomaxillofacial Radiology, Ankara, Turkey
| | - Bulent Altunkaynak
- Gazi University Faculty of Arts and Sciences, Department of Statistics, Ankara, Turkey
| | - Zuhre Akarslan
- Gazi University Faculty of Dentistry, Department of Dentomaxillofacial Radiology, Ankara, Turkey
| |
Collapse
|
11
|
Abstract
Ethylene oxide gas is an agent in the sterilization of medical devices due to its effectiveness and compatibility with most materials. The advantages and disadvantages, as well as its recommended uses, are explored in this review article. The variables and their relevance on process optimization are described, the types of processing cycles are detailed and emphasis is given to the design and validation of the sterilization process.
Collapse
|
12
|
Investigation into ethylene oxide treatment and residuals on DNA and downstream DNA analysis. Sci Justice 2017; 57:13-20. [PMID: 28063580 DOI: 10.1016/j.scijus.2016.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 09/09/2016] [Accepted: 09/10/2016] [Indexed: 11/22/2022]
Abstract
Recent years have seen a significant increase in the sensitivity of DNA testing, enabling the determination of DNA profiles from low levels of cellular material. However, the increased sensitivity is in many ways a double-edged sword as background contaminating DNA generated during the manufacture of consumables and sampling devices is now being detected and may compromise the interpretation of the DNA profile results. This study initially demonstrated the effectiveness of ethylene oxide (EO) as a post-production treatment to eliminate DNA on swabs, used as a sampling device for the recovery of cellular material. Subsequently, the potential adverse effects of any residual EO remaining on the swabs on the downstream DNA analysis on both rayon and cotton swabs were investigated and the levels of remaining EO measured. Two main variables were tested: the amount of time elapsed since EO treatment of the swabs prior to use, and the time elapsed between cellular material collection and DNA analysis. Residual levels of EO were found to be below quantitation levels and therefore also international standards. The results indicated that while there was a negligible effect of EO treatment on DNA recovered from rayon swabs, there was however an adverse effect on the DNA profiles recovered from cotton swabs. The adverse effect was negatively correlated with time since EO treatment and positively correlated with time to DNA analysis.
Collapse
|
13
|
Leow-Dyke SF, Rooney P, Kearney JN. Evaluation of Copper and Hydrogen Peroxide Treatments on the Biology, Biomechanics, and Cytotoxicity of Decellularized Dermal Allografts. Tissue Eng Part C Methods 2016; 22:290-300. [PMID: 26701226 DOI: 10.1089/ten.tec.2015.0271] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Decellularized tissue allografts are paving the way as an alternative to cellular tissue transplantation. Effective sterilization or decontamination of tissue allografts is paramount for the safety of the allograft; however, some of the current sterilization procedures have a detrimental effect on the tissue scaffold. The bactericidal and virucidal activity of copper (II) ions and hydrogen peroxide (H2O2) have been widely reported, however, their effect on the biology, biochemistry, and biocompatibility of decellularized tissue have yet to be elucidated. In this study, decellularized human dermis (dCELL human dermis) was treated with copper (II) chloride (CuCl2) and H2O2; both singly and in combination, and parameters, including concentration, pH, and synergy between CuCl2 and H2O2, were evaluated to identify conditions where any detrimental effects on the tissue scaffold were observed. Skin from 13 human donors was retrieved with appropriate consent and processed into dCELL human dermis. The dCELL human dermis was then treated for 3 h with 0.1 mg/L-1 g/L (w/v) CuCl2 and 0.01-7.5% (v/v) H2O2 and combinations of both of these in the same concentration range. dCELL human dermis treated with solutions of 0.1 mg/L-1 g/L CuCl2 or 0.01-7.5% H2O2 caused no detrimental effects on gross histology, collagen denaturation, collagen orientation, and biomechanical properties of the tissue or cytotoxicity. The highest combined concentration of CuCl2 and H2O2 demonstrated an increase in ultimate tensile strength, loss of collagen type IV immunostaining at the dermal-epidermal junction, and in vitro cytotoxicity. Combinations within the range of up to 10 mg/L CuCl2 with up to 0.5% H2O2 had no effect. The data identify the concentrations of CuCl2 and H2O2 solutions that have no effect on the biological, biomechanical, and biochemical properties of dCELL human dermis, while retaining biocompatibility. These treatments may be suitable for use as sterilization/decontamination agents on human decellularized tissues.
Collapse
Affiliation(s)
- Sophie F Leow-Dyke
- NHS Blood and Transplant, Tissue Services R&D , Liverpool, United Kingdom
| | - Paul Rooney
- NHS Blood and Transplant, Tissue Services R&D , Liverpool, United Kingdom
| | - John N Kearney
- NHS Blood and Transplant, Tissue Services R&D , Liverpool, United Kingdom
| |
Collapse
|
14
|
Effect of sterilization techniques prior to antimicrobial testing on physical properties of dental restorative materials. J Dent 2015; 43:703-14. [DOI: 10.1016/j.jdent.2015.03.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 03/23/2015] [Accepted: 03/27/2015] [Indexed: 11/19/2022] Open
|
15
|
Wang Y, Shen C, Li J, Wang H, Wang H, Jiang H, Chu Y. Thermal desorption extraction proton transfer reaction mass spectrometer (TDE-PTR-MS) for rapid determination of residual solvent and sterilant in disposable medical devices. J Pharm Biomed Anal 2011; 55:1213-7. [DOI: 10.1016/j.jpba.2011.03.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 02/28/2011] [Accepted: 03/02/2011] [Indexed: 11/25/2022]
|