scholarly journals Comparison of disinfection protocol of irreversible hydrocolloid (alginate) impressions through plastic and metallic trays

2014 ◽  
Vol 17 (3) ◽  
pp. 54 ◽  
Author(s):  
Luiz Kiyoaki Okazaki ◽  
Cidney Hiroaki Cato ◽  
Lúcia Teramoto ◽  
Anna Carolina Borges Pereira Costa ◽  
Marcelo Fava ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Sodium Hypochlorite ◽  
Cross Infection ◽  
Percentage Reduction ◽  
Effective Time ◽  
Colony Forming Unit ◽  
Tukey Test ◽  
Before And After ◽  
Irreversible Hydrocolloid ◽  
The Ideal

<p class="normal"><strong>Introduction</strong>: Many studies have evaluated the disinfection of irreversible hydrocolloid impressions through different disinfecting agents. However, impression trays can be source of cross-infection requiring disinfection. This study aimed to determine which would be the most suitable tray (metallic or plastic), available in dental market, and the ideal time to achieve disinfection by using 1% sodium hypochlorite poured into the alginate impression. <strong>Material and methods</strong>: Thirty dental impressions from the patients aged from 7-12 years and treated in the Discipline of Orthodontics of the institution were divided into two groups according to the impression tray type: 15 impressions through plastic tray (Morelli) and 15 impressions through metallic tray (Tecnodent). The material collection was performed before and after the application of 1% sodium hypochlorite for 3, 5 and 10 minutes. After the incubation period of 48 hours at 37ºC, the microorganism colonies were counted on the plates presenting from 30 to 300 colonies to determine the colony-forming unit (CFU) per mL. CFU/mL results were transformed into logarithm and submitted to statistical analysis by applying ANOVA and Tukey test (<em>p</em> ≤ 0.05). <strong>Results</strong>: Greater CFU percentage reduction occurred in alginate after three minutes, in both tray types. Concerning to tray types, it could be observed that the plastic tray showed 100% of reduction after 5 minutes while the metallic tray exhibited 81.49% of reduction after 3 minutes.<strong> Conclusion</strong>: 1 – The plastic tray showed the most effective disinfection after 5 minutes, with 100% of CFU reduction; 2 – The most effective time of disinfection with 1% sodium hypochlorite poured into the impression was 5 minutes, for both tray types.</p>

scholarly journals Imperfections in plaster surfaces caused by the release of hydrogen gas of polyvinylsiloxane impression materials

2013 ◽  
Vol 1 (2) ◽  
pp. 98
Author(s):  
Jefferson Ricardo Pereira ◽  
Janaina Salomon Ghizoni ◽  
Paulo Henrique Orlato Rossetti ◽  
Naudy Brodbeck May ◽  
Accácio Lins do Valle
Keyword(s):  
Stainless Steel ◽  
Statistical Analysis ◽  
Plaster Cast ◽  
Hydrogen Gas ◽  
Tukey Test ◽  
Type Iv ◽  
Impression Materials ◽  
Hydrogen Liberation ◽  
Stone Type ◽  
The Ideal

Purpose: The purpose of this study was to evaluate the number of bubbles of hydrogen liberation from different polyvinylsiloxane impression materials. Material and Methods: A metallic stainless steel jig containing six receptacles, like trays, was constructed to accommodate the impression materials. The molds were poured immediately, and at 1 hour, 12 hours and 24 hours in order to evaluate the number of bubbles present in each sample. Each sample was made of improved stone (type IV), totaling 48 samples for each polyvinylsiloxane impression material. After setting, the surface of each sample was inspected under a light microscope at 40x magnification and the number of bubbles was recorded. Results were submitted to statistical analysis by ANOVA and Tukey Test (p=.05). Results: ANOVA test showed statistically significant differences among the polyvinylsiloxane impression materials, as determined by the number of bubbles (p<.05). The Tukey test showed statistically significant differences among the three groups (p<.05). Conclusions: Statistical differences were found between addition silicone with regard to the ideal time to wait for the plaster cast, showing that Aquasil results in fewer bubbles in plaster, followed by the President and Simply Perfect samples.

scholarly journals Evaluation of the surface hardness of composite resins before and after polishing at different times

2006 ◽  
Vol 14 (3) ◽  
pp. 188-192 ◽  
Author(s):  
Michelle Alexandra Chinelatti ◽  
Daniela Thomazatti Chimello ◽  
Renata Pereira Ramos ◽  
Regina Guenka Palma-Dibb
Keyword(s):  
Statistical Analysis ◽  
Vickers Hardness ◽  
Composite Resin ◽  
Surface Hardness ◽  
Composite Resins ◽  
The Other ◽  
Test Results ◽  
Tukey Test ◽  
Natural Flow ◽  
Before And After

PURPOSE: The aim of this study was to evaluate the surface hardness of six composite resins: Revolution, Natural Flow, Fill Magic Flow, Flow-it! (flowables), Silux Plus (microfilled) and Z100 (minifilled) before and after polishing at different times. MATERIALS AND METHODS: For this purpose, 240 specimens (5mm diameter, 1.4mm high) were prepared. Vickers hardness was determined before and after polishing at different times: immediately, 24h, 7 and 21 days after preparation of the samples. Statistical analysis was performed by ANOVA and Tukey test. RESULTS: There was no difference in the hardness of flowable resins, which had lower hardness than the minifilled resin. The minifilled resin showed the highest surface hardness as compared to the other materials (p<0.01). All materials exhibited higher hardness after polishing, being more evident after 7 days. CONCLUSION: It may be concluded that, regardless of the composite resin, surface hardness was considerably increased when polishing was delayed and performed 1 week after preparation of the samples.

Impact of Legislation on Opioid Prescribing following Hysterectomy and Hysteroscopy in Arizona and Florida

2021 ◽  
pp. 1-9
Author(s):  
Aakriti R. Carrubba ◽  
Amy E. Glasgow ◽  
Elizabeth B. Habermann ◽  
Amanda P. Stanton ◽  
Megan N. Wasson ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Cohort Analysis ◽  
Oral Morphine ◽  
Interrupted Time Series ◽  
Interrupted Time Series Analysis ◽  
Opioid Use ◽  
Prescribing Practices ◽  
Opioid Prescribing ◽  
Before And After ◽  
Legislative Changes

<b><i>Objectives:</i></b> This study aimed to determine the oral morphine equivalents (OMEs) prescribed and refill rates following hysterectomy and hysteroscopy in the setting of opioid prescribing practice changes in 2 states. <b><i>Design:</i></b> This is a retrospective cohort analysis consisting of 2,916 patients undergoing hysterectomy or hysteroscopy between July 2016 and September 2019 at 2 affiliated academic hospitals in states that underwent legislative changes in opioid prescribing in 2018. <b><i>Methods:</i></b> Participants were identified using the Current Procedural Terminology procedure codes in Arizona and Florida. Hysterectomy was chosen as the most invasive gynecologic procedure, while hysteroscopy was chosen as the least invasive. Medical records were abstracted to find opioid prescriptions from 90 days before surgery to 30 days after discharge. Patients with opioid use between 90 and 7 days before surgery were excluded. Prescriptions were converted to OMEs and were calculated per quarter year. Statistical analysis included Wilcoxon rank sum <i>t</i> tests for OMEs and χ<sup>2</sup> <i>t</i> tests for refill rates. Interrupted time-series analysis was used to determine significant change in OMEs before and after legislative change. Statistical analysis was performed using SAS version 9.4 (SAS Institute, Cary, NC, USA). <b><i>Results:</i></b> In Arizona, 1,067 hysterectomies were performed; 459 (43%) vaginal, 561 (52.6%) laparoscopic/robotic, and 47 (4.4%) abdominal. There were 530 hysteroscopies. Overall median OMEs decreased from 225 prior to July 2018 to 75 after July 2018 (<i>p</i> &#x3c; 0.0001). The opioid refill rate remained unchanged at 7.4% (<i>p</i> = 0.966). In Florida, there were 769 hysterectomies; 241 (31.3%) vaginal, 476 (61.9%) laparoscopic/robotic, and 52 (6.8%) abdominal. There were 549 hysteroscopies. Overall median OMEs decreased from 150 prior to July 2018 to 0 after July 2018 (<i>p</i> &#x3c; 0.0001). The opioid refill rate was similar (7.8% before July 2018 and 7.3% after July 2018; <i>p</i> = 0.739). <b><i>Limitations:</i></b> Limitations include involvement of a single hospital institution with a total of 10 fellowship-trained surgeons and biases inherent to retrospective study design. <b><i>Conclusions:</i></b> Legislative and provider-led changes coincided with decreases in opioid prescribing after 2018 in both states without increasing rates of refills and showed actual data reflected in the medical record. Gynecologists must actively participate in safe prescribing practices to decrease opioid dependence and misuse.

Uses the Disinfectants against fungi isolated from the homes

2011 ◽  
Vol 35 (1) ◽  
pp. 167-173
Author(s):  
Rusol Muhammedi Al Bahran
Keyword(s):  
Candida Albicans ◽  
Statistical Analysis ◽  
Aspergillus Niger ◽  
Aspergillus Fumigatus ◽  
Sodium Hypochlorite ◽  
Frequency Ratio ◽  
Sensitivity Test ◽  
Common Genus

The study included 100 samples collected from different locations of the homes were located in the area of Ali Saleh in Baghdad 6 species were isolated from fungi and the most common genus or species of fungi isolated were Aspergillus fumigatus by frequency ratio of 25.84%, and occurrence ratio of 23%, Penicilium by frequency ratio of 21.34%, and occurrence ratio of 19%, Mucor by frequency ratio 20.22%, and the occurrence ratio of 18%, Candida albicans by frequency ratio of 15.73%, the occurrence ratio of 14%, Rhizopus frequency ratio by 13.48%, the occurrence ratio of 12% and Aspergillus niger frequency ratio by 3.37% and the occurrence ratio of 3%. Then the sensitivity test of disinfectants were studied against fungi isolated by using three disinfectants Chloroxylenol known commercially by (Dettol), Chlorhexidine commercially known by (Hibitane) and Sodium hypochlorite commercially known by (Bleach), and a study for the effected of three concentrations of each disinfectant (5, 2.5, 1.25)%, and the use of statistical analysis (ANOVA) to contrast the differences and Dnken test to the variation in any disinfectant or the most efficient concentrations of other disinfectants were observed that concentrations of 5% was the most efficient of concentrations than (2.5%) and (1.25%). As the disinfectant Dettol was significantly the most efficient from Bleach and Hibitane.

scholarly journals Scarification with sulphuric acid of Schizolobium amazonicum Huber ex Ducke seeds - FABACEAE

2007 ◽  
Vol 64 (3) ◽  
pp. 308-313 ◽  
Author(s):  
Eniel David Cruz ◽  
José Edmar Urano de Carvalho ◽  
Rafaela Josemara Barbosa Queiroz
Keyword(s):  
Statistical Analysis ◽  
Experimental Design ◽  
Seed Germination ◽  
Sulphuric Acid ◽  
Seed Coat ◽  
Immersion Time ◽  
Germination Index ◽  
Efficient Treatment ◽  
Tukey Test

Seed coat impermeability to water occurs in many species, including Schizolobium amazonicum Huber ex Ducke. To promote germination in seeds with coat impermeability the use of sulphuric acid (H2SO4) is recommended. The objective of this study was to identify a better time for the scarification with sulphuric acid for S. amazonicum seeds. The effect of scarification with sulphuric acid for 20, 40 and 60 min on germination and speed germination was studied for seeds that were either sowed immediately after scarification or after a 24-hour period of immersion in water. Seeds were sown on a mix of sand and sawdust (1:1). The experimental design was completely randomized with four replications of 50 seeds. The statistical analysis of germination was carried out at six, nine, 12, 15, 18, 21 and 24 days after sowing, in a factorial scheme. For speed germination the means were compared by the Tukey test. There was an interaction between treatments to overcome dormancy and immersion time after scarification in most evaluations. Immersion in water accelerated the beginning of germination. All treatments to overcome dormancy promoted seed germination. However, scarification for 60 min, showed better germination, 92% when immediately sown and 86.5% when sown after 24 hours. Speed germination index was highest for scarified seeds for 60 min followed by immersion in water. Scarification for 60 min was the most efficient treatment to promote germination in S. amazonicum seeds.

scholarly journals Statistical analysis of second order effects variation with the stories height of reinforced concrete buildings

2017 ◽  
Vol 10 (2) ◽  
pp. 333-357
Author(s):  
D.M. OLIVEIRA ◽  
N.A. SILVA ◽  
C.C. RIBEIRO ◽  
S.E.C. RIBEIRO
Keyword(s):  
Reinforced Concrete ◽  
Statistical Analysis ◽  
Second Order ◽  
Order Effects ◽  
Reinforced Concrete Buildings ◽  
First Order ◽  
Concrete Buildings ◽  
Ideal Situation ◽  
Second Order Effects ◽  
The Ideal

Abstract In this paper the simplified method to evaluate final efforts using γ z coefficient is studied considering the variation of the second order effects with the height of the buildings. With this purpose, several reinforced concrete buildings of medium height are analyzed in first and second order using ANSYS software. Initially, it was checked that the (z coefficient should be used as magnifier of first order moments to evaluate final second order moments. Therefore, the study is developed considering the relation (final second order moments/ first order moments), calculated for each story of the structures. This moments relation is called magnifier of first order moments, "γ", and, in the ideal situation, it must coincide with the γ z value. However, it is observed that the reason γ /γ z varies with the height of the buildings. Furthermore, using an statistical analysis, it was checked that γ /γ z relation is generally lower than 1.05 and varies significantly in accordance with the considered building and with the presence or not of symmetry in the structure.

scholarly journals Statistical Analysis using traditional technique, Microsoft Excel and Predictive Analytic Software

10.17158/514 ◽  
2016 ◽  
Vol 19 (2) ◽  
Author(s):  
Jovelyn M. Durango ◽  
Carlito P. Yurango
Keyword(s):  
Statistical Analysis ◽  
Completion Time ◽  
Microsoft Excel ◽  
Instructional Tools ◽  
Traditional Technique ◽  
Significant Difference ◽  
Before And After ◽  
Computer Based ◽  
The One ◽  
Time Required

<p>The advent of technology has improved the way statistics is taught and learned. It is claimed that the use of computer-based instructional tools can actively explore the meaning of statistical concepts among the students, as well as enhance their learning experiences. This study aimed to compare three methods of statistical analysis namely, the traditional technique (use of the calculator), Microsoft Excel and Statistical Package for Social Sciences (SPSS) software. This investigation utilized the experimental design, specifically the One-Group Pretest – Posttest Design. There were six education students who self-assessed their attitude before and after the introduction of the use of various computation techniques and performed the statistical analysis considering also the completion time required for each process. Results of the study revealed an increase in the level of attitude among the respondents form the pretest to the posttest. Also, the cognitive level regardless of the approach was very high. However, the t-test failed to establish a significant difference in the attitude among the respondents. On the other hand, there were significant differences in both the test scores and completion time of the respondents in the three methods in favor of SPSS.</p><p> </p><p><strong>Keywords: </strong>Information technology, statistics, traditional technique, Microsoft excel, SPSS, comparative analysis, experimental research design, Davao City, Philippines. </p>

scholarly journals PENERAPAN METODE BERMAIN PERAN MAKRO TERHADAP KEMAMPUAN BERBICARA

Instruksional ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 9
Author(s):  
Nirwana Nirwana
Keyword(s):  
Statistical Analysis ◽  
Role Playing ◽  
Wilcoxon Test ◽  
Control Group ◽  
Observation Data ◽  
Group Data ◽  
Before And After ◽  
Group B ◽  
Nonparametric Statistical ◽  
Selection Of

Effect of  role playing macro methods on children's speaking ability in group B in Nurul Rohmah Bekasi. This research is motivated by the lack of ability to speak children. This is because the method used in the learning process is more likely to use conventional methods. The selection of methods to role playing macro so that children can be motivated and interested in learning and can stimulate the ability to speak children. The population in this study were all children of group B in kindergarten Nurul Rohmah while the study sample was B3 group 11 children for the experimental group and B1 group 11 children for the control group. Data collection techniques through test techniques, and observation. Data analysis techniques used were descriptive statistical analysis and nonparametric statistical analysis. Based on the results of the Wilcoxon test calculation, the calculated T value is 66 and T table 11 then the results obtained T count (66)> T table (11) H1 is accepted and Ho is rejected means that there is an effect of role playing macro  methods on children's speaking ability. Whereas the calculated Z value obtained is 2.93 and 1.645 table Z then the result of Z arithmetic (2.93)> Z table (1.645) H1 is accepted and Ho is rejected which means that there is an effect of role playing macro method on children's speaking ability. These results indicate that there is a change in the value of the child's speaking ability before and after getting learning based on the role playing macro method.

scholarly journals A comparative clinical study on the effect of Gudashunti Nasya and Kola Kulattadi Ruksha Sweda in Manyasthamba

2020 ◽  
Vol 5 (03) ◽  
pp. 1-6
Author(s):  
Sandeep K ◽  
Guruprasad G ◽  
Veeraj Hegde
Keyword(s):  
Statistical Analysis ◽  
Clinical Study ◽  
Severe Pain ◽  
Computer Usage ◽  
Before And After ◽  
Comparative Clinical Study ◽  
Group A ◽  
Group B ◽  
Classical Symptom

Due to present day lifestyle, a greater number of people are inclined to desk work and computer usage leading to many disorders. Manyasthamba is one among such disorders where the stiffness of neck with severe pain is the classical symptom which hampers our day to day life. While explaining treatment of Manyasthamba our Acharyas explained Rukshasweda and Nasya Karma as main line of treatment. Here a study was done by taking Gudashunti Yoga explained in Sharangadara Samhita indicated for Nasya and Kolakulattadi Churna indicated in Vatavyadhi explained in Ashtanga Sangraha for Ruksha Churna Sweda. A comparative clinical study of 40 patients suffering from Manyastambha were selected after thorough investigation. Patients were subjected to Nasya Karma in Group A and Ruksha Sweda and Nasya Karma in Group B for 7 days. Patients were assessed based on standard parameters before and after treatment and 7 days follow up. The statistical analysis revealed that there was a significant improvement in parameters like pain and stiffness. Hence proving the efficacy in the condition.

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