scholarly journals Evaluation of Residual Monomers Eluted from Pediatric Dental Restorative Materials

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Tugba Bezgin ◽  
Ceren Cimen ◽  
Nurhan Ozalp
Keyword(s):  
High Performance Liquid Chromatography ◽  
Repeated Measures ◽  
High Performance ◽  
Adverse Reactions ◽  
Composite Resins ◽  
Repeated Measures Anova ◽  
Restorative Materials ◽  
Polishing Procedures ◽  
Post Hoc ◽  
Dental Restorative

Unreacted monomers eluted from resin-based restorative materials have been considered a reason of local and systemic adverse reactions. This study was designed to determine the effect of finishing and polishing procedures on the elution of Bis-GMA, TEGDMA, UDMA, and HEMA monomers from compomer and bulk-fill composite resins. Bulk-fill composite (3M ESPE GmbH, Seefeld, Germany) and compomer (Dentsply DeTrey GmbH, Konstanz, Germany) specimens with 3 × 4   mm diameters were prepared. The specimens were randomly divided into two groups, and finishing-polishing procedures were applied only to the experimental groups. Release of residual monomers was analyzed by using High-Performance Liquid Chromatography (HPLC) after 24, 48, and 72 hours. Repeated measures ANOVA and Tukey post hoc tests were used for comparisons. Finishing and polishing procedures had a significant effect on reducing the quantity of UDMA release in the Filtek™ Bulk Fill composite and Bis-GMA, HEMA, and TEGDMA in the Dyract XP compomer ( p < 0.05 ). The restorative materials investigated here are not chemically stable after polymerization, and concentrations of eluted monomers may reach critical toxicity levels even after one restoration placement. Finishing and polishing procedures are mandatory to reduce residual monomers.

scholarly journals INFLUÊNCIA DO TREINAMENTO CONCORRENTE DE CAPOEIRA E ATLETISMO NO DESEMPENHO MOTOR DE CRIANÇAS PRATICANTES DE FUTSAL

1970 ◽  
Vol 81 (155) ◽  
Author(s):  
Evaldo Maciel Pinto ◽  
Diogo Guimarães ◽  
Athos Henrique Rocha Villaça ◽  
Sebastião Lobo Da Silva ◽  
Bibiano Madrid
Keyword(s):  
Weight Gain ◽  
Motor Skills ◽  
Repeated Measures ◽  
Motor Performance ◽  
Concurrent Training ◽  
Motor Proficiency ◽  
Repeated Measures Anova ◽  
Kolmogorov Smirnov ◽  
Study Participants ◽  
Post Hoc

This study aimed to determine the influence of concurrent training and athletic capoeira levels of motor performance in children aged 7 to 10 years indoor football. Study participants were children (n = 39) were male. The subjects were divided into two groups, submitted to concurrent training, the AF group (n = 20) underwent the training of soccer and athletics and FC group (n = 19) soccer and capoeira. To study and evaluate the level of motor  performance of the two sample groups, we applied a battery of tests for statistical analysis and checked the normality of the data (Kolmogorov-Smirnov) and applied repeated measures ANOVA with post hoc Bonferroni. We used the statistical packages SPSS (12.0) and Instat (3.0). The results note that in terms of motor proficiency children who practiced FC compared to  children who practiced FA had equal values in the components of motor skills, however, both groups showed a trend in weight gain in their motor skills.

scholarly journals Rifampicin and isoniazid plasma concentrations in relation to adverse reactions in tuberculosis patients: a retrospective analysis

2016 ◽  
Vol 7 (6) ◽  
pp. 239-247 ◽  
Author(s):  
L. Aït Moussa ◽  
O. El Bouazzi ◽  
S. Serragui ◽  
D. Soussi Tanani ◽  
A. Soulaymani ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Liver Injury ◽  
High Performance ◽  
Adverse Reactions ◽  
Plasma Concentrations ◽  
Drug Reactions ◽  
Normal Range ◽  
Tuberculosis Patients ◽  
High Concentrations

Objective: High concentrations of antituberculosis (anti-TB) drugs can be associated with many adverse drug reactions (ADRs). The objective of this study was to examine the plasma concentrations of rifampicin (RMP) and isoniazid (INH) in patients with and without ADRs. Methods: Concentration monitoring data of patients treated with anti-TB drugs were retrospectively analyzed from 2009 to 2011. RMP and INH plasma concentrations were measured 2 and 3 h after drug administration respectively using high-performance liquid chromatography. Results: A total of 54 out of 120 patients have experienced ADRs to anti-TB drugs. The median concentrations [interquartile range (IQR)] obtained in patients with and without ADRs were 6.7 mg/l (3.7–9.9) and 5.6 mg/l (2.9–8.6) ( p = 0.56) for RMP and 4.3 mg/l (2.3–5.3) and 3.1 mg/l (1.7–4.8) ( p = 0.04) for INH, respectively. Related median doses (IQR) were 8.7 mg/kg (8.0–10.0) and 8.6 mg/kg (6.5–9.9) ( p = 0.42) for RMP and 4.8 mg/kg (4.3–5.0) and 4.0 mg/kg (2.8–5) ( p < 0.01) for INH, respectively. Concentrations above the expected range in patients with and without ADRs were not reached for RMP, but were 76% and 65% for INH, respectively. Correlation between concentrations and doses has not been established for RMP or INH. In addition, high INH concentrations showed no association with sex, age, liver injury or renal or diabetes. Conclusions: High INH concentrations were common in patients with and without ADRs whereas RMP concentrations were low or within the normal range in most patients. Further studies are required to assess the association between high INH concentrations and the occurrence of ADRs.

scholarly journals THE MISUSE OF SYNTAX ALTERATION FOR GEE AND ANOVA POST-HOC ANALYSES IN SPSS

2020 ◽  
Vol 7 (1) ◽  
pp. 1-6
Author(s):  
João Pedro Nunes ◽  
Giovanna F. Frigoli
Keyword(s):  
Repeated Measures ◽  
Type I Error ◽  
Statistical Tests ◽  
Data Interpretation ◽  
Online Support ◽  
Type I ◽  
K Value ◽  
Repeated Measures Anova ◽  
Post Hoc ◽  
Statistical Results

The online support of IBM SPSS proposes that users alter the syntax when performing post-hoc analyses for interaction effects of ANOVA tests. Other authors also suggest altering the syntax when performing GEE analyses. This being done, the number of possible comparisons (k value) is also altered, therefore influencing the results from statistical tests that k is a component of the formula, such as repeated measures-ANOVA and Bonferroni post-hoc of ANOVA and GEE. This alteration also exacerbates type I error, producing erroneous results and conferring potential misinterpretations of data. Reasoning from this, the purpose of this paper is to report the misuse and improper handling of syntax for ANOVAs and GEE post-hoc analyses in SPSS and to illustrate its consequences on statistical results and data interpretation.

scholarly journals Durability of silorane repair with silorane and methacrylate resin.

2014 ◽  
Vol 17 (2) ◽  
pp. 27
Author(s):  
Thays Regina Costa ◽  
Lucielle Cristina Cecchin ◽  
Alessandro Dourado Loguercio ◽  
Alessandra Reis
Keyword(s):  
Phosphoric Acid ◽  
Aluminum Oxide ◽  
Repeated Measures ◽  
Composite Resin ◽  
Nitrate Solution ◽  
Water Storage ◽  
Silver Nitrate Solution ◽  
Composite Resins ◽  
Repeated Measures Anova ◽  
Bonded Interface

<p><strong>Objective:</strong> The durability of bonded interface between silorane (SIL) and methacrylate-based (MET) composite resins wasn’t investigated yet. The purpose was to evaluate the repair strength (RS) and nanoleakage of the SIL repair using silorane- or methacrylate-based materials immediately [IM] or after 6 months of water storage [6M]. <strong>Materials and Methods:</strong> fifteen resin blocks (Filtek P90, 3MESPE) were polished, sandblasted with 50-µm aluminum oxide sandblasting and cleaned with 37% phosphoric acid. Then the specimens were divided into three groups: SIL-SIL (adhesive and composite resin); SIL-MET (silorane adhesive and methacrylate based composite) and MET-MET (methacrylate-based adhesive and composite resin) were used for the repair. Composite-composite bonded sticks (0.9 mm<sup>2</sup>) were sectioned and divided to be tested in tension (1.0 mm/min) IM or 6M. Two sticks from each tooth, at each time, were immersed in a 50% silver nitrate solution and evaluated by SEM. Data were analyzed by two-way repeated measures ANOVA and Tukey´s tests. <strong>Results:</strong> The RS of the SIL was not dependent upon the adhesive and composite used for the repair. A significant reduction of the RS was observed for all groups after 6M. <strong>Conclusions:</strong> Both materials can be used for the repair of the silorane composite, despite degradation occur after 6M.</p>

scholarly journals Ipsilateral and Contralateral Torque Responses to Bilateral and Unilateral Maximal, Fatiguing, Isokinetic Leg Extensions

2020 ◽  
Vol 8 (4) ◽  
pp. 25
Author(s):  
Tyler J. Neltner ◽  
John Paul V. Anders ◽  
Joshua L. Keller ◽  
Robert W. Smith ◽  
Terry J. Housh ◽  
...  
Keyword(s):  
Isometric Contraction ◽  
Repeated Measures ◽  
Central Fatigue ◽  
Peak Torque ◽  
Maximal Voluntary Isometric Contraction ◽  
Repeated Measures Anova ◽  
The Right ◽  
Post Hoc ◽  
Isokinetic Peak Torque

Background: Few studies have compared performance fatigability (PF) for bilateral versus unilateral isokinetic tasks. Objectives: The purpose of this study was to examine: Mode-specific testing responses to isokinetic fatigue, differences in PF between bilateral and unilateral leg extensions, and the effects of fatiguing, unilateral, dynamic leg extensions on contralateral isokinetic peak torque (PT) and maximal voluntary isometric contraction (MVIC). Methods: Eight men (mean ± SD: age= 22.5 ± 2.5 yr.) completed pre- and post-testing for PT and MVIC following 50 bilateral, unilateral right or left leg maximal, isokinetic leg extensions at 180°·s-1, on three separate days. Fatigue-induced decreases in PT and MVIC were used to quantify PF. The data were analyzed with a 4-way repeated measures ANOVA, follow up, and post-hoc analyses. Results: The results indicated that there were no differences (p > 0.05) in PF for the bilateral versus unilateral fatiguing tasks, decreases in PT (p < 0.001 - 0.016; d = 0.54 - 2.58) and MVIC (p < 0.001 - 0.006; η2p = 0.682 - 0.962) for the exercised legs during unilateral fatigue, and a contralateral increase (p = 0.007) in PT following the right leg fatiguing task. Conclusion: The results indicated that PT was more sensitive to fatiguing isokinetic tasks than was MVIC. In addition, there was a facilitation of PT in the contralateral leg following unilateral right leg fatigue. The differences in PT and MVIC testing may be attributable to the timing and/or relative contributions of peripheral and central fatigue.

scholarly journals Analysis of Base Monomer Elution from 3 Flowable Bulk-Fill Composite Resins Using High Performance Liquid Chromatography (HPLC)

2018 ◽  
Vol 24 ◽  
pp. 4679-4690 ◽  
Author(s):  
Ryta Łagocka ◽  
Małgorzata Mazurek-Mochol ◽  
Katarzyna Jakubowska ◽  
Maja Bendyk-Szeffer ◽  
Dariusz Chlubek ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Composite Resins

Mineralized Plasmatic Matrix for Horizontal Ridge Augmentation in Anterior Maxilla with and without a Covering Collagen Membrane

2020 ◽  
Vol 14 (1) ◽  
pp. 743-751
Author(s):  
Ehab Abdelfadil ◽  
Wael Aboelmaaty
Keyword(s):  
Repeated Measures ◽  
T Test ◽  
Collagen Membrane ◽  
Anova Analysis ◽  
Repeated Measures Anova ◽  
Ridge Augmentation ◽  
Parametric Data ◽  
Student’S T ◽  
Post Hoc ◽  
Student’S T Test

Background: Mineralized Plasmatic Matrix [MPM] is a unique form of platelet rich fibrin that contains mineralized bone graft particles within a fibrin network. Aim: This study was conducted to evaluate horizontal ridge augmentation using MPM with and without a coverage membrane. Materials and Methods: Sixteen edentulous spaces were randomly divided into 2 equal groups. MPM was used for horizontal ridge augmentation with and without a covering collagen membrane (group 1 and 2, respectively). Cone Beam CT images were obtained preoperatively as well as 1 week and 4 months postoperatively to evaluate alveolar ridge and the resorption of the grafting material at 3 predetermined points along with the site where the future dental implant will be placed. Student’s t-test (Unpaired) was used for comparing two different groups with quantitative parametric data and student’s t-test (Paired) was used for comparing two related groups with quantitative parametric data while repeated measures ANOVA (Analysis of variance) followed by post-hoc Bonferroni was used for comparing more than two related groups with quantitative parametric data. Student’s t-test (Unpaired) was used for comparing two different groups with quantitative parametric data and student’s t-test (Paired) was used for comparing two related groups with quantitative parametric data while repeated measures ANOVA (Analysis of variance) followed by post-hoc Bonferroni was used for comparing more than two related groups with quantitative parametric data. Results: There was no statistically significant difference between the gained bone width in both groups. More but not statistically significant resorption was recorded in group 2. Conclusion: MPM can be successfully used for horizontal ridge augmentation without a barrier membrane.

Initial Evaluation of the LifeForce Yoga Program as a Therapeutic Intervention for Depression

2008 ◽  
Vol 18 (1) ◽  
pp. 49-57 ◽  
Author(s):  
Shannon Bennett ◽  
Amy Weintraub ◽  
Sat Bir Khalsa
Keyword(s):  
Repeated Measures ◽  
Self Report ◽  
Initial Training ◽  
Home Practice ◽  
Repeated Measures Anova ◽  
Symptoms Of Depression ◽  
Main Effect ◽  
Symptom Scores ◽  
Assessment Time ◽  
Post Hoc

There is a growing body of literature citing Yoga as an effective intervention for decreasing symptoms of depression. This naturalistic pilot study investigated the efficacy of the LifeForce Yoga Program in decreasing reported symptoms of depression and other mood symptoms. The sample consisted of 94 individuals who completed self-report questionnaire before participating in a five-day LifeForce Yoga training. 54 of these individuals completed the same questionnaire after two weeks of home practice following the training, and 33 participants completed these questionnaires two months after the initial training. Repeated measures ANOVA tests demonstrated a main effect for time, indicating that mean symptom scores decreased significantly across the assessment time points on nearly all of the outcome measures of interest. Post hoc t-tests showed that the statistically significant change occurred between Time 1 and Time 2, and was then largely maintained from Time 2 to Time 3. These results suggest that participation in a comprehensive Yoga program, designed specifically to address mood, can lead to decreased symptoms of depression and associated physical or mood states.

Degradation of Resin Restorative Materials by Streptococcus Mutans: A Pilot Study

2017 ◽  
Vol 41 (3) ◽  
pp. 225-227 ◽  
Author(s):  
Ankit K Gautam ◽  
Ruchi Thakur ◽  
N D Shashikiran ◽  
Singla Shilpy ◽  
Nikita Agarwal ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Statistical Analysis ◽  
Pilot Study ◽  
High Performance ◽  
Restorative Material ◽  
Group Iii ◽  
Incubation Solution ◽  
Group I ◽  
Restorative Materials

Objective: To evaluate the degradation of three resin based restorative materials by S Mutans. Study design: Class I cavity was prepared in extracted premolars and were randomly divided into 3 groups (Group I – Conventional composite (CC), Group II – Resin Modified GIC and Group III–Giomer). Teeth were then restored by respective restorative material and equally divided in two subgroups (Control and Experimental). Experiment subgroup samples were then incubated in 2 ml of BHI with 1:10 dilution of SM (MTCC-497) grown overnight in BHI whereas control subgroup samples were incubated in BHI without SM. The incubation solution was collected at 2,14 and 30 days interval, and the analysis for identification and quantification of Bis-HPPP was done by High performance Liquid Chromatography. Results: Statistical analysis of the collected data revealed a statistically increased Bis HPPP production in the presence of SM in all the tested materials, with minimum in Resin Modified GIC and a maximum in Conventional Composite (CC). Conclusion: SM degrades the resin based restorative materials & among the tested materials Resin Modified GIC appears to be most Biostable.

Impact of various finishing and polishing techniques and composite materials on Candida albicans biofilm formation

2019 ◽  
Vol 58 (5) ◽  
pp. 698-702
Author(s):  
Elif Aybala Oktay ◽  
Seyda Ersahan ◽  
Fidan Alakus Sabuncuoglu ◽  
Huseyin Tort ◽  
Serpil Karaoglanoglu
Keyword(s):  
Composite Material ◽  
Candida Albicans ◽  
Composite Materials ◽  
Biofilm Formation ◽  
Composite Resins ◽  
Oral Infections ◽  
Restorative Materials ◽  
Polishing Procedures ◽  
Candida Albicans Biofilms ◽  
Candida Biofilm

Abstract Candida albicans biofilms are commonly associated with severe oral infections. In dentistry, prosthetic and restorative materials are potential structures for the adhesion of C. albicans facilitating the formation of Candida biofilm and infection. Three composite resins (Charisma Classic, Sonic Fill, Estelite ∑ Quick) and two finishing-polishing systems (Biscover LV, Dental Finishing Disc) were evaluated for Candida biofilm formation. A Candida biofilm assay showed that both the resin and the finishing/polishing procedures affect Candida biofilm formation. Specifically, Candida biofilm formation was significantly lower in Sonic Fill resin than both Charisma Classic and Estelite ∑ Quick (P = .021). The type of finishing and polishing procedure also significantly affected the Candida biofilm formation to composite material (P &lt; .001). Candida biofilm formation was more advanced after Biscover LV procedure than Dental Finishing Disc procedure.

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