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1.
Zhonghua Kou Qiang Yi Xue Za Zhi ; 55(4): 229-234, 2020 Apr 09.
Artigo em Chinês | MEDLINE | ID: mdl-32268623

RESUMO

Splatter, droplet and aerosol, which potentially cause disease via contact and droplets transmission, may be produced during dental treatments. Through the risk model analysis of airborne diseases, it is clarified that the key points of preventing aerosol transmission are infection source management, increasing ventilation, reducing exposure time and correct use of protective masks. In order to reduce the aerosol pollution, it is necessary to strengthen the management of water and air piping systems and the control of splashing. Air and surface disinfection and enhanced personnel protection may reduce the risk. Based on the analysis of infection chain, this article elaborates the role of standard and additional precautions for cutting off the disease transmission chain. Systematic, comprehensive and evidence-based prevention and control measures should become our concerns.


Assuntos
Aerossóis , Assistência Odontológica , Controle de Infecções , Transmissão de Doença Infecciosa do Paciente para o Profissional/prevenção & controle , Assistência Odontológica/normas , Desinfetantes de Equipamento Odontológico , Equipamentos Odontológicos , Humanos , Controle de Infecções/métodos , Máscaras
2.
Hua Xi Kou Qiang Yi Xue Za Zhi ; 38(2): 117-121, 2020 Apr 01.
Artigo em Chinês | MEDLINE | ID: mdl-32314881

RESUMO

The outbreak of corona virus disease (COVID-19) has raised concerns among dentists to develop strategies to prevent infection of dental equipment, materials, and patients during an epidemic period. Strategies following the National Laws and Standards of China and local standards of several provinces for controlling cross-infection and instituting protective measures for medical staff in dental clinics during an epidemic period are discussed. A proposal is put forth for dental clinics that will face similar situations in the future. Further research is warranted to address potential problems that will be encountered under such dire circumstances.


Assuntos
Infecções por Coronavirus , Coronavirus , Clínicas Odontológicas , Controle de Infecções , Betacoronavirus , China , Equipamentos Odontológicos , Surtos de Doenças , Humanos , Pandemias , Pneumonia Viral
3.
J Endod ; 46(2): 252-257, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31831180

RESUMO

INTRODUCTION: This study evaluated 4 different light-emitting diode (LED) transilluminators and the impact of operator experience in the detection of dentinal defects through an ex vivo TRUEJAW surgical model (Dental Engineering Laboratories, Santa Barbara, CA). METHODS: Forty-four extracted and endodontically treated mandibular premolar teeth were evaluated. Teeth were mounted in the models followed by surgical flaps and osteotomies to expose the apical third of the roots. After apical resection, the root-end surfaces were randomly inspected for the presence or absence of dentinal defects using a dental operating microscope (DOM) at ×19.4 magnification by experienced and novice LED evaluators. The assessment was made with the DOM light and 4 masked LED transilluminators of different diameters and luminous flux. The teeth were examined outside the models to establish the ground truth. The sensitivity, specificity, and kappa and McNemar test values of each light source by examiner were calculated. RESULTS: The use of LED transilluminators improved the diagnostic sensitivity of dentinal defects when compared with the DOM light alone for both examiners. For the LED-experienced evaluator, the medium-low transilluminator had statistically significant higher sensitivity than the DOM light and the small-low and small-high transilluminators (P < .05). For the novice LED evaluator, the medium-high transilluminator had the highest sensitivity. There was a statistically significant difference between the sensitivities of the medium-low transilluminator between the examiners (P < .05). CONCLUSIONS: Within the limitations of this ex vivo surgical study, dentinal defects were more often detected with the LED transilluminators with a larger diameter and increased lumens. The operator's LED transilluminator experience was found to have a positive effect on the detection of dentinal defects using transillumination.


Assuntos
Dentina , Microcirurgia , Transiluminação , Dente Pré-Molar , Equipamentos Odontológicos , Dentina/patologia , Humanos
4.
Biocontrol Sci ; 24(4): 201-212, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31875612

RESUMO

Water from the waterlines of dental units is often contaminated with bacteria but there have been few studies accurately assessing the diversity of these bacterial populations. The aim of our study was to assess the bacterial diversity present in water collected from dental unit waterlines using the Illumina MiSeq. Water was collected from two separate dental units located in a dental hospital and two units found in two separate private clinics in Gangneung-si, Korea. From the four water samples that were analyzed, a total of 233 bacterial genera were identified. The most abundant genera were Sphingomonas (25%), Halomonas (20%), Reyranella (8%), and Novosphingobium (6%). Halomonas was more prevalent in the two dental units located at the dental hospital, while Reyranella and Sphingomonas were more commonly found in the private dental clinics. Only 19 of the 233 identified genera were common between water samples from all dental units. Opportunistic pathogens were shown to account for 7.7% of the total bacterial genera identified. Our results have demonstrated that there is a wide assortment of bacterial genera present in dental unit waterlines.


Assuntos
Bactérias/classificação , Equipamentos Odontológicos/microbiologia , Microbiologia da Água , Bactérias/genética , Bactérias/patogenicidade , Carga Bacteriana , Contaminação de Equipamentos , Variação Genética , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , República da Coreia , Análise de Sequência de DNA
5.
Artigo em Inglês | MEDLINE | ID: mdl-31683783

RESUMO

Water is essential during dental care. Physical and chemical techniques should be used to maintain a good water quality with respect to bacteria, and to ensure the safety of exposed patients and dental staff. The aim of this survey was to assess the modalities used by dental practitioners in Eastern France to maintain the water quality of their dental unit waterlines (DUWLs). A questionnaire about water quality maintenance practices was sent to 870 dental offices in 2016. The questionnaires were completed by 153 dental offices, covering about 223 dental care units. The majority of units were fed by mains water (91.0%), which is generally unfiltered (71.3%). One-third (33.6%) of the units had an independent water bottle reservoir. Flushing, a basic physical technique to improve the quality of units' outflow water, was practiced in 65.4% of dental offices. Concerning the chemical treatment of water, it was used for 62.1% of the units. An analysis of the microbiological quality of the DUWL water was only carried out in 2.6% of the offices. In conclusion, providing better training to dental staff seems necessary to improve their practices and to generalize procedures that improve the microbiological quality of the water used.


Assuntos
Biofilmes , Contagem de Colônia Microbiana , Desinfetantes de Equipamento Odontológico , Equipamentos Odontológicos/microbiologia , Contaminação de Equipamentos/prevenção & controle , Controle de Infecções Dentárias/métodos , Microbiologia da Água , França , Humanos , Inquéritos e Questionários
7.
Artigo em Inglês | MEDLINE | ID: mdl-31547090

RESUMO

Dentistry is highly energy- and resource-intensive with a significant environmental impact. To consolidate green dentistry supply chains, delivering the care of highest quality that meets client value should not be neglected. This study emphasized the importance of client-centered healthscape design for facilitating a green dentistry supply chain. A client-centered healthscape design, which promotes clients' positive emotions and increases willingness to revisit the dentist, plays a critical role in realizing green dentistry supply chains in the long run. For this purpose, the relationship among dental healthscape design elements, client emotions, and revisit intentions was investigated using a Kansei engineering-based approach. The effects of dental healthscape elements on clients' positive emotions and the effects of positive emotions on clients' revisit intentions were holistically examined on the basis of the stimulus-organism-response model. Through this approach, 17 elements of design, ambience, and social interaction factors that comprise the dental healthscape and 20 Kansei words used to express clients' positive emotions regarding dental service were identified. A questionnaire survey was used to assess Kansei and revisit intention in healthscape scenarios, composed of varied design elements. Primary data were collected from 600 individuals from 2017 to 2018 throughout Taiwan. Partial least squares was applied to holistically analyze the effects of dental healthscape elements on clients' positive emotions and the effects of positive emotions on clients' revisit intention to generate a Kansei model for the dental healthscape. All 20 Kansei words had significant positive effects on the dental revisit intention of clients. The five positive emotions most associated with increased revisit intention were thoughtful, hopeful, tender, comfortable, and cozy. The Kansei model of the dental healthscape provides references for healthscape design that maintains positive client emotions during the dental service and results in high revisit intention. This approach can realize an emotion-centered design for dental healthscapes that promotes preventive dental care, early treatment, and effective use of medical resources, and consequently contributes to green dentistry supply chains.


Assuntos
Comportamento do Consumidor/estatística & dados numéricos , Assistência Odontológica/psicologia , Equipamentos Odontológicos/provisão & distribução , Emoções , Ergonomia/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Taiwan , Adulto Jovem
8.
Artigo em Inglês | MEDLINE | ID: mdl-31430972

RESUMO

Dental unit waterlines (DUWLs) can be considered one of the possible routes of H. pylori transmission, although its presence in DUWLs has not yet been investigated thoroughly. The present study aimed to discover the prevalence of H. pylori and oral streptococci (S. oralis and S. mutans) in DUWLs to evaluate the risk of exposure to human pathogens in dental practices. We collected the output water from 60 dental chair units (DCUs) in 26 private dentistry settings in Turin, searching for H. pylori and oral streptococci (OS) DNA, with a polymerase chain reaction (PCR) technique. At the same time, dentists completed a questionnaire about their DCUs, their main activities, the presence of anti-retraction devices, their attitudes about disinfection, etc. No dental chair unit tested was contaminated with H. pylori or S. mutans; only one dental chair was contaminated with S. oralis (1.7%). Considering the results, we can state that: (i) the lack of H. pylori DNA in water samples analyzed, suggests that municipal water is presumably treated with a sufficient chlorine level to inactivate DNA over time; (ii) the aspiration of oral fluids is limited by anti-retraction valves fitted distally to hand pieces; (iii) propidium monoazide qPCR (PMA-qPCR) could be a good technique to investigate and monitor potential environmental sources of infections such as DUWLs.


Assuntos
Equipamentos Odontológicos/microbiologia , Exposição Ambiental/análise , Helicobacter pylori/isolamento & purificação , Microbiologia da Água , Infecção Hospitalar/etiologia , Infecção Hospitalar/prevenção & controle , Infecção Hospitalar/transmissão , Infecções por Helicobacter/etiologia , Infecções por Helicobacter/prevenção & controle , Infecções por Helicobacter/transmissão , Humanos , Controle de Infecções , Medição de Risco , Streptococcus mutans/isolamento & purificação , Streptococcus oralis/isolamento & purificação
9.
Clin Ter ; 170(4): e258-e261, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31304512

RESUMO

AIMS: This study aims to estimate the microbial presence on the surface of different brand new NiTi endodontic instruments for clinical use. MATERIAL AND METHODS: Eleven different types of NiTi rotary endodontic instruments, obtained from their fresh opened original packages, were assigned to three different groups, according to packaging type and sterilization and tested for bacterial contamination. Isolated bacteria were identified by using standard microbiological methods and then counted. Differences observed in groups were analyzed statistically by using the one-way analysis of variance (ANOVA) for dependent samples and the Tukey HSD post hoc test. RESULTS: Statistical differences were found between instruments delivered in plastic boxes which bacterial count resulted higher than those obtained from instruments delivered in blisters (p<0.01). CONCLUSIONS: Some brand new endodontic instruments showed degrees of bacterial contamination that both quantitatively and qualitatively deserve to be considered in clinical procedures.


Assuntos
Bactérias/isolamento & purificação , Equipamentos Odontológicos/microbiologia , Endodontia/instrumentação , Contaminação de Equipamentos , Níquel , Titânio , Humanos , Esterilização
10.
J Water Health ; 17(4): 532-539, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31313992

RESUMO

Pseudomonas aeruginosa is an environmental bacterium, ubiquitous in aquatic habitats and water distribution systems, including dental unit waterlines (DUWLs). We investigated the prevalence of P. aeruginosa in DUWLs from private dental settings. We also analyzed the relationship between P. aeruginosa contamination and the presence of Legionella spp. and total viable count (TVC) in order to suggest a simple and inexpensive protocol to test the quality of water from DUWLs. We detected and quantified P. aeruginosa both by culture and by a PMA (propidium monoazide)-qPCR method. Overall, we detected P. aeruginosa in 17 samples using the PMA-qPCR and in 11 samples using the culture. All culture-positive samples were positive with the PMA-qPCR too, with an agreement between the two methods of 93% and a Cohen's kappa coefficient of κ = 0.747 (good concordance). Comparing results with results of our previous study, we noted that (a) P. aeruginosa was isolated only from DUWLs with high TVC and (b) five out of six Legionella-positive samples were negative for Pseudomonas spp. Our final suggestion is that the cleanliness of DUWLs should be assessed by TVC because it is a good indicator of the presence of pathogens such as Legionella spp. and P. aeruginosa.


Assuntos
Equipamentos Odontológicos , Pseudomonas aeruginosa/crescimento & desenvolvimento , Microbiologia da Água , Bactérias , Contaminação de Equipamentos
11.
Artigo em Inglês | MEDLINE | ID: mdl-31344972

RESUMO

Studies conducted over the last 40 years have demonstrated that the water output from dental unit waterlines (DUWLs) is often contaminated with high densities of microorganisms. It has been monitored the microbiological quality of the water in 30 public dental facilities in northern Italy in order to assess the health risk for patients and dental staff. In each facility, samples of water both from taps and from DUWLs were analyzed in order to evaluate heterotrophic plate counts (HPCs) at 22 °C and 36 °C, and to detect coliform bacteria, Pseudomonas aeruginosa, Legionella pneumophila and amoebae. In 100% of the samples taken from the DUWLs, the concentration of HPCs was above the threshold as determined by the Ministère de la Santé et des Solidarités (2007). The concentration of P. aeruginosa was greater than the indicated threshold in 16.67% of the hand-pieces analyzed. A total of 78.33% of samples were contaminated by L. pneumophila, while in the samples taken from the DUWLs alone, this percentage rose to 86.67%. Amoebae were detected in 60% of the samples taken from hand-pieces; all belonging to the species V. vermiformis. This study documented the presence of various microorganisms, including Legionella spp., at considerably higher concentrations in water samples from DUWLs than in samples of tap water in the same facilities, confirming the role of the internal DUWLs in increasing microbial contamination, especially in the absence of proper management of waterborne health risks.


Assuntos
Equipamentos Odontológicos/microbiologia , Contaminação de Equipamentos , Microbiologia da Água , Amoeba , Enterobacteriaceae , Monitoramento Ambiental , Itália , Legionella pneumophila , Pseudomonas aeruginosa
12.
Clin Oral Implants Res ; 30(10): 997-1004, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31325382

RESUMO

OBJECTIVE: To compare discomfort/pain following periodontal probing around teeth and peri-implant probing around implants with or without platform switching. METHODS: Two dentists recruited and examined 65 patients, each of them exhibiting a dental implant with a contralateral tooth. Only two types of implants were included: one with and one without platform switching. Periodontal and peri-implant probing depths (PPD) and probing attachment level (PAL) were assessed. Whether implant or tooth was measured first was randomly assigned. Immediately after probing, patients scored discomfort/pain using a visual analogue scale (VAS). The emergence profiles of implant crowns were assessed as angles between interproximal surfaces on radiographs. RESULTS: Sixty-five patients (age 69; 63/76 years [median; lower/upper quartile]; 38 females, 11 smokers) were examined. With the exception of mean PPD and PAL (p < .05) clinical parameters (PPD, PAL, bleeding on probing, suppuration) were well balanced between implants and teeth. Peri-implant probing (VAS: 10; 0.75/16.25) caused significantly (p < .001) more discomfort/pain than periodontal probing (4; 0/10). Logistic regression analysis identified a larger difference between discomfort/pain for peri-implant and periodontal probing in the maxilla than the mandible (p = .003). Comparing discomfort/pain between implants maxilla (p = .006) and emergence profile (p = .015) were associated with discomfort/pain. Type of implant (with/without platform switching) had no significant effect on discomfort/pain. CONCLUSIONS: Peri-implant probing caused significantly more discomfort/pain than periodontal probing. Implant design with/without platform switching failed to have a significant effect on discomfort/pain.


Assuntos
Implantes Dentários , Dor , Índice Periodontal , Equipamentos Odontológicos , Feminino , Humanos , Maxila , Bolsa Periodontal
13.
Luminescence ; 34(4): 444-449, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31025441

RESUMO

Dental orthopantogram (OPG)/cone beam computed tomography (CBCT) scanners are gaining popularity due to their 3D imaging with multiplanar view that provides clinical benefits over conventional dental radiography systems. Dental OPG/CBCT provides optimal visualization of adjacent overlaying anatomical structures that will be superpositioned in any single projection. The characteristics of indigenously developed optically stimulated luminescence dosimeters, namely, aluminium oxide doped with carbon (Al2 O3 :C), lithium magnesium phosphate doped with terbium and boron (LiMgPO4 :Tb,B) and lithium calcium aluminium fluoride doped with europium and yttrium (LiCaAlF6 :Eu,Y) were evaluated for their use in dental dosimetry. The dose-response of these dosimeters was studied at X-ray energies 60 kV, 70 kV and 81 kV. Radiation doses were also measured using Gafchromic film for comparison. Radiation dose was measured at eight different locations of a polymethyl methacrylate (PMMA) head phantom including eyes. The optically stimulated luminescence (OSL) sensitivity of LiMgPO4 :Tb,B is about 1.5 times and LiCaAlF6 :Eu, is about 20 times higher than the sensitivity of Al2 O3 :C. It was found that measured radiation doses by the three optically stimulated luminescence dosimeters (OSLDs) and Gafchromic film in the occipital region (back side) of a PMMA phantom, were consistent but variations in dose at other locations were significantly higher. The three OSLDs used in this study were found to be suitable for radiation dose measurement in dental units.


Assuntos
Tomografia Computadorizada de Feixe Cônico , Equipamentos Odontológicos , Dosimetria por Luminescência Estimulada Opticamente , Dosímetros de Radiação , Tomografia Computadorizada de Feixe Cônico/instrumentação , Humanos , Dosimetria por Luminescência Estimulada Opticamente/instrumentação , Óptica e Fotônica , Doses de Radiação
14.
Ann Ig ; 31(2): 109-116, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30714608

RESUMO

BACKGROUND: The quality and health safety of water used for refrigeration and flushing of the handpieces, water-syringes and other components of dental units is of considerable importance. Water crosses these devices by a system of intersected small plastic tubes (about 2 mm of diameter), named dental unit water lines (DUWLs). DUWLs may be heavily colonized by many bacterial species in a planktonic phase, adherent or in biofilm lifestyle, resulting in a potential risk of infection, not only for all professionals who routinely use these devices, but also for occasional-patients, especially immunocompromised patients. Contamination of DUWLs can be prevented or reduced with the use of disinfectants, but the eradication of microorganisms, especially which those are adherent or living in biofilm lifestyle on the inner surfaces of DUWLs is challenging and often, the normal methods of water disinfection are not effective. Moreover, disinfectants routinely used to disinfect DUWLs may alter the bond strength of the dentine bonding agent used for restorative practice in dentistry. STUDY DESIGN: To identify an innovative and alternative strategy, able to prevent bacterial adhesion to DUWL surfaces through a physical approach, which is more effective in overcoming the problem of DUWL contamination and the risk of infection compared to the standard methods already in use. In this pilot study we tested a member of the oral streptococci family, that is not a component of the biofilm detected on the walls of DUWL, but is frequently detected in water samples from DUWL, due to human fluid retraction during dental therapy. Namely, the pathogenic bacterial species Streptococcus mutans. METHODS: We employ elastic acoustic waves at high-energy in preventing S. mutans adhesion to the inner walls of an experimental water circuit reproducing a DUWLs. To stress the capability of acoustic waves to interfere with bacterial adhesion also in extreme conditions, a high S. mutans contamination load was adopted. RESULTS: We observe a significant decrease of adherent bacteria exposed to acoustic waves treatment respect to control. CONCLUSION: This study demonstrates the effectiveness of acoustic waves in counteracting the adhesion of S. mutans to the inner walls of an experimental water circuit reproducing a DUWL, opening up new prospects for future practical applications. The interesting results, so far obtained, require an in-depth analysis of the methods regarding both the various bacterial species involved and the infective charges to be used.


Assuntos
Equipamentos Odontológicos/microbiologia , Desinfecção/métodos , Contaminação de Equipamentos/prevenção & controle , Som , Streptococcus mutans/isolamento & purificação , Biofilmes , Desinfetantes/administração & dosagem , Humanos , Projetos Piloto , Microbiologia da Água
15.
Acta Cir Bras ; 34(1): e20190010000008, 2019 Feb 14.
Artigo em Inglês | MEDLINE | ID: mdl-30785509

RESUMO

PURPOSE: To create a question and answer tool on patents on EMHO. METHODS: Was used the Thinking Design methodology divided into four phases: Discovery, Definition, Development and Delivery. Discovery Phase: Desk research was carried out in: SciELO, Pubmed, LILACS, Google and Google Scholar. Once the target audience was selected, the interviews were conducted. Definition Phase: the interviewees' difficulties were mapped, on an Excel spreadsheet. Development Phase: a brainstorming was conducted with the public interviewed. Delivery Phase: the prototype, validation and final elaboration of the tool were made. RESULTS: Discovery Phase: 10 inventors were identified and the interviews were carried out. Definition Phase: 80% of the interviewees determined lack of information as one of the problems. The main content was defined as: the patent process, from the beginning of the idea to the deposit (70%), search for precedence (40%) and informing partners (30%). Development Phase: with the brainstorming, the tool type was defined as an interactive site. Delivery Phase: a prototype with content framework and an interactive video was presented for validation. After approval, the interactive website was developed, which was made available to the public. CONCLUSION: A question and answer tool on patents in EMHO was developed.


Assuntos
Equipamentos Odontológicos/normas , Equipamentos e Provisões Hospitalares/normas , Patentes como Assunto , Humanos , Inventores , Pesquisa Qualitativa , Estudos Retrospectivos , Inquéritos e Questionários
16.
J Dent Educ ; 83(4): 474-482, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30745348

RESUMO

The Isovac system was introduced into the Virginia Commonwealth University dental curriculum with the intention that it would be used as a substitute when the dental dam could not be placed. The aim of this study was to determine the usage and factors that influenced dental students' decisions to use the dental dam or Isovac. All third-and fourth-year dental students (n=210) were asked in 2017 to complete a 26-item survey. The survey asked about students' operative procedures completed using the dental dam and Isovac, their own and their patients' preferences, basic dental dam knowledge, full-time and adjunct faculty recommendations of method, importance of factors influencing their decisions, and anticipated dental dam use after graduation. Comments were also allowed. A total of 164 students responded to the survey, for a 78% response rate. Of the respondents, 58% said they used the Isovac only when they could not use the dental dam. Among the eight general practice groups in which students are educated in delivery of comprehensive dental care, preference was significantly different for placement of Class II restorations. Overall, the students' dental dam knowledge was low, and the knowledge results were not associated with its use. According to the students, recommendations by full-time and adjunct faculty members were significantly different. Factors ranked by importance from greatest to least for determining which isolation method to use were as follows: moisture control, procedure, patient comfort, application time, ease of placement, and attending faculty. Student comments overwhelmingly favored dental dam usage if a dental assistant was available. This study found that dental dam and Isovac use was not standardized among the general practice groups and faculty. Student education, faculty calibration, and increased use of trained dental assistants are required to ensure education is consistent among all general practice groups.


Assuntos
Equipamentos Odontológicos , Diques de Borracha , Estudantes de Odontologia/psicologia , Equipamentos Odontológicos/estatística & dados numéricos , Humanos , Padrões de Prática Odontológica/estatística & dados numéricos , Diques de Borracha/estatística & dados numéricos , Sucção/instrumentação , Inquéritos e Questionários
17.
BMC Res Notes ; 12(1): 47, 2019 Jan 21.
Artigo em Inglês | MEDLINE | ID: mdl-30665455

RESUMO

OBJECTIVE: This study monitored real-time torque variation of the WaveOne Gold (WOG) and Reciproc Blue (RB) during root canal preparation of mandibular molars. Thirty-six mandibular molars were prepared with WOG Primary 25.07 (WOGP, n = 36) and the RB R25 25.08 (RBR25, n = 36) for the mesial canals, whereas WOG Large 45.05 (WOGL, n = 18) and RB R40 40.06 (RBR40, n = 18) for the distal. Canal preparation was divided into thirds and the torque, maximum torque and time, were recorded. RESULTS: The RBR25 instruments exhibited higher maximum torque in the apical third in contrast to the WOGP instruments (p < 0.05). The intragroup analysis found a significant difference in maximum torque between the cervical and apical thirds, and the middle and apical thirds (p < 0.05) for both instruments (RBR25 and WOGP). The WOGP group had the shortest preparation time (p < 0.05). There were no significant differences between the WOGL and RBR40 for any of the parameters evaluated (p > 0.05). The RBR25 had the highest torque when compared to the WOGP. Both instruments exhibited higher torque in the apical third and there were no significant differences between the instruments in the distal canal.


Assuntos
Equipamentos Odontológicos , Desenho de Equipamento , Dente Molar , Preparo de Canal Radicular/instrumentação , Humanos , Preparo de Canal Radicular/métodos , Torque
18.
Quintessence Int ; 50(1): 58-65, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30600327

RESUMO

Disinfection is a crucial aspect of patient care in dentistry. In the pre-19th century era, natural elements like acids, sulfur, mercury, and various alkaline metals were valued for their ability to obliterate pathogens. More recently aerosols, sprays, and disinfectant wipes with more powerful chemicals including quaternary ammonium compounds and aldehydes have become popular. As aerosols fall out of favor due to their health and environmental risks, disinfectant wipes are becoming the most trusted form of clinical sanitization. This article explores the history as well as the current practice of disinfection in the dental profession and further explores the variations in the use of surface disinfection based on the published literature. The current practice guidelines as recommended by agencies like Centers for Disease Control (CDC) were studied and summarized for this review.


Assuntos
Descontaminação/métodos , Desinfecção/métodos , Controle de Infecções Dentárias/métodos , Centers for Disease Control and Prevention, U.S. , Equipamentos Odontológicos/microbiologia , Instrumentos Odontológicos/microbiologia , Contaminação de Equipamentos/prevenção & controle , Humanos , Guias de Prática Clínica como Assunto , Propriedades de Superfície , Estados Unidos
19.
Artigo em Inglês | MEDLINE | ID: mdl-30682855

RESUMO

Infection risk management in a dental unit waterline (DUWL) involves healthcare personnel and patients and is related to routine exposure to water and aerosols that may contain bacterial species. To improve water safety plans, maintenance, and sanitation procedures, analyses of heterotrophic plate counts (HPCs) at 36 °C, and two other microorganisms frequently associated with biofilms, Pseudomonas aeruginosa and Legionella spp., were performed in order to evaluate differences in microbiological contamination between two types of DUWLs: Type A, provided by a water tank, and Type B, directly connected to municipal water. The data showed that the water supply and water safety plan differentially influenced microbiological contamination: Type A DUWLs were more contaminated than Type B DUWLs for all microbiological parameters tested, with significant changes in the percentage of positive samples and contamination levels that were beyond the limits of standard guidelines. The results obtained show how the storage tank, the absence of anti-retraction valves, and the disinfection procedures performed are the main critical points of Type A DUWLs, which confirms that dental unit management (maintenance/sanitization) is often missed or not correctly applied by stakeholders, with an underestimation of the real risk of infection for patients and operators.


Assuntos
Equipamentos Odontológicos/microbiologia , Contaminação de Equipamentos , Microbiologia da Água , Abastecimento de Água , Bactérias/isolamento & purificação , Biofilmes , Contagem de Colônia Microbiana , Contaminação de Equipamentos/prevenção & controle
20.
J Hosp Infect ; 103(1): e73-e80, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-30500388

RESUMO

BACKGROUND: Dental handpieces undergo a decontamination process before reutilization. Thorough cleaning is a prerequisite to effective sterilization, to guarantee safety and prevent cross-infections. AIM: To assess the cleaning efficacy offered by devices dedicated to dental handpieces. METHODS: PIDTests©, which are patented tubes made of transparent material and designed to replace handpieces in cleaning devices, were artificially stained by Soil Test© (Browne/STERIS). Three cycles were performed with PIDTests© connected to every handpiece adapter in the four different machines tested: X-Cid 2© (Micro-Mega) with a total of nine PIDTests©; iCare+© (NSK) with nine PIDTests©; DAC Universal© (W&H) with 18 PIDTests©; and BioDA 80© (VR2M) with 24 PIDTests©. A visual evaluation and a biuret reaction test were performed. FINDINGS: In three of the tested cleaning devices (X-Cid2©, iCare+© and DAC Universal©), all of the PIDTests© showed Soil Test© residues, on the internal and external surfaces indicating cleaning was ineffective. Only the BioDA 80© showed no residual stains on all the PIDTests© and negative biuret reaction test results, making the cleaning effective. CONCLUSIONS: Manufacturers should optimize the cleaning device parameters, based on the Sinner circle (grouping compensatory parameters which influence the effectiveness of a cleaning process, such as pressure, temperature, time, detergent concentration), to improve cleaning efficacy and enable dental surgeons to ensure the safety. Although PIDTests© are the only tool to provide visual indications on the cleaning efficacy of washer-disinfectors dedicated to handpieces, manufacturers should continue with the development of improved and validated tools to assess cleaning efficacy.


Assuntos
Descontaminação/métodos , Equipamentos Odontológicos , Humanos
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