scholarly journals Degradation of the Strength of Elastomeric Chains subjected to Different Levels of Salivary pH associated with Exposure to Mouthrinses with and without Fluoride

2015 ◽  
Vol 4 (1) ◽  
pp. 23-28
Author(s):  
Matheus Melo Pithon ◽  
Camilla Andrade ◽  
Amir Felipe Santos
Keyword(s):  
Artificial Saliva ◽  
Initial Period ◽  
The Other ◽  
Control Group ◽  
Time Intervals ◽  
Salivary Ph ◽  
Level Of Significance ◽  
Elastomeric Chains ◽  
Different Levels ◽  
Made In

ABSTRACT Aim To evaluate the degradation of strength of elastomeric chains submitted to different levels of salivary pH and exposed to mouthrinses with and without fluoride. Materials and methods Seven groups of chain elastics (n = 18) mounted on test devices that remained immersed in artificial saliva were tested. Group 1 (pH 5 and without fluoride), 2 (pH 5 and with fluoride), 3 (pH 6 and without fluoride), 4 (pH 6 and with fluoride), 5 (pH 7.5 and without fluoride) and 6 (pH 7.5 and with fluoride) and 7 (control group). The test groups were exposed to mouthrinses twice a day for 30 seconds, with an interval of 12 hours between one exposure and the other. A control group was immersed in distilled water. The strength of samples was gauged with a dynamometer. Six measurements of strength were made in the following time intervals: initial (0), 1, 7, 14, 21 and 28 days. The force values were submitted to the analysis of variance (ANOVA) and Tukey's test to determine whether there were statistical differences between each group. The level of significance adopted was 5% (α = 0.05). Results When the groups were evaluated individually, comparing the factor time in the initial period, the force was statistically higher than that in all the other experimental time intervals (p < 0.05). From the 7th day up to day 28, no statistical differences were found among the groups (p > 0.05). The factors pH and the presence of mouthwash with or without fluoride did not interfere in the results among the groups (p < 0.05). Conclusion The presence or absence of fluoride in the mouthrinses used in the study made no difference to the force degradation of the chain elastics, as the test groups obtained similar results among them in the studied time intervals. How to cite this article Pithon MM, Andrade C, Santos AF, Campos M, Saini R. Degradation of the Strength of Elastomeric Chains subjected to Different Levels of Salivary pH associated with Exposure to Mouthrinses with and without Fluoride. Int J Experiment Dent Sci 2015;4(1):23-28.

scholarly journals Do mouthwashes with and without bleaching agents degrade the force of elastomeric chains?

2013 ◽  
Vol 83 (4) ◽  
pp. 712-717 ◽  
Author(s):  
Matheus Melo Pithon ◽  
Ailana Cardoso Rodrigues ◽  
Érica Luiza Santana Moreira Sousa ◽  
Lília Paula de Souza Santos ◽  
Natália dos Santos Soares
Keyword(s):  
Artificial Saliva ◽  
Initial Period ◽  
Test Group ◽  
Experimental Period ◽  
The Other ◽  
Control Group ◽  
Distilled Water ◽  
Bleaching Agent ◽  
Time Intervals ◽  
Elastomeric Chains

ABSTRACT Objective: To evaluate, in vitro, the effect of mouthwashes with and without bleaching agents on the force of elastomeric chains. Materials and Methods: A total of 108 elastomeric chain specimens was divided into six groups (n  =  18 in each group). Two test groups were exposed to two types of commonly used mouthwashes (Plax and Listerine), and two groups were exposed to mouthwashes containing bleaching agent (Plax Whitening and Listerine Whitening). Immersion in the solutions was performed twice a day for 60 seconds. One group of control specimens remained immersed in artificial saliva throughout the entire experimental period, and the other control specimens were exposed to distilled water. Force measurements were performed at six time intervals (initial, 1 day, 7 days, 14 days, 21 days, and 28 days). Results: No statistically significant differences were found between the groups in the initial period (P &gt; .05). Statistically significant differences were found between the control group and the Plax, Plax Whitening, and Listerine groups at the time intervals of 7, 14, and 21 days. In the initial period, the force was statistically significantly higher than it was in any of the other experimental periods (P &lt; .05). The control group with distilled water and the test group with Plax Whitening maintained the most force during the experimental period. Conclusion: The presence of bleaching agent has no influence on the force degradation of elastomeric chains.

Effects of Different Commercially Available Mouth Rinses on The Force Degradation of Orthodontic Elastomeric Chain

2020 ◽  
Vol 23 (2) ◽  
pp. 41-48
Author(s):  
Halima Mohammed Hassan ◽  
Anees Mahmood Mudhir
Keyword(s):  
Artificial Saliva ◽  
Testing Machine ◽  
Control Group ◽  
Time Intervals ◽  
Mouth Rinses ◽  
Force Decay ◽  
Significant Difference ◽  
Mouth Wash ◽  
And Control ◽  
Elastomeric Chains

Aim of the study: To evaluate the effects of different commercial type of mouthwashes on the force decay of the orthodontic elastomeric chain. Materials and methods: two hundred pieces of the elastomeric chains with two different configurations were divided into five groups (one control group and four different mouthwashes groups). after one-day immersion in artificial saliva then immersion in the specific mouthwashes (kin, Vitis, perio_aid, splat) for one minute twice daily and time intervals after 7 days, 14 days, 21 days, and 28 then washed and kept in artificial saliva at 37°C again. Force decay was calculated by Instron measured, digital force gauge - Instron universal testing machine then compared different force decay of elastic types. Results: A significant difference was found among between the four types of mouth wash and control group, according to close and short elastic chain the kin mouth wash was shows a significant difference (0.002), while splat mouthwash was shown a no significant difference. Conclusion: splat mouth wash groups showed no significant influence on the force degradation of the chain elastics tested. Kin mouthwash exhibit the highest force decay and found different significant effects.

scholarly journals Does chlorhexidine in different formulations interfere with the force of orthodontic elastics?

2012 ◽  
Vol 83 (2) ◽  
pp. 313-318 ◽  
Author(s):  
Matheus Melo Pithon ◽  
Dandara Andrade Santana ◽  
Kássio Henrique Sousa ◽  
Isa Mara Andrade Oliveira Farias
Keyword(s):  
Artificial Saliva ◽  
Initial Period ◽  
Oral Solution ◽  
Control Group ◽  
Time Intervals ◽  
Group 4 ◽  
Group 3 ◽  
Group 5 ◽  
Group 2 ◽  
Group 1

ABSTRACT Objective: To evaluate the effects of different concentrations of chlorhexidine on the decline in force of orthodontic elastics. Materials and Methods: In a laboratory study, five groups of samples were tested, with one control group represented by distilled water (group 1) and four experimental groups: 0.12% manipulated chlorhexidine (group 2), 0.2% manipulated chlorhexidine (group 3), 0.12% chlorhexidine gluconate–based oral solution (0.12% Periogard; group 4), and 0.2% Cleanform mouthwash (formula and action; group 5). The test groups were submersed in artificial saliva at 37°C. Templates were used and submerged in the chlorhexidine solutions for 30 seconds twice a day. Force was measured with a digital dynamometer at six different time intervals: 0, 1, 7, 14, 21, and 28 days. Results: No statistical differences were found among the groups in the initial period, at 24 hours, and at 7 days (P &gt; .05). There were statistical differences between groups 2 and 5 at 14 days of the experiment and between group 1 and the others at 28 days. In the initial period, the force was statistically higher than it was at any of the other periods of the experiment (P &lt; .05). Conclusion: In the present study, chlorhexidine showed no significant influence on the force degradation of the chain elastics tested.

scholarly journals Does the temperature of beverages affect the surface roughness, hardness, and color stability of a composite resin?

2013 ◽  
Vol 07 (02) ◽  
pp. 165-171 ◽  
Author(s):  
Duygu Tuncer ◽  
Emel Karaman ◽  
Esra Firat
Keyword(s):  
Surface Roughness ◽  
Composite Resin ◽  
Color Change ◽  
Artificial Saliva ◽  
Color Stability ◽  
The Other ◽  
Control Group ◽  
Baseline Values ◽  
Hardness Values ◽  
Properties Of Composites

ABSTRACT Objective: To investigate the effect of beverages′ temperature on the surface roughness, hardness, and color stability of a composite resin. Materials and Methods: Fifty specimens of the Filtek Z250 composite (3M ESPE, Dental Products, St.Paul, MN, USA) were prepared and initial roughness, microhardness, and color were measured. Then the specimens were randomly divided into five groups of 10 specimens each: Coffee at 70°C, coffee at 37°C, cola at 10°C, cola at 37°C, and artificial saliva (control). After the samples were subjected to 15 min × 3 cycles per day of exposure to the solutions for 30 days, the final measurements were recorded. Results: After immersion in beverages, the artificial saliva group showed hardness values higher than those of the other groups (P < 0.001) and the microhardness values were significantly different from the initial values in all groups except for the control group. Both cola groups showed roughness values higher than the baseline values (P < 0.05), while the other groups showed values similar to the baseline measurements. When ΔE measurements were examined, the 70°C coffee group showed the highest color change among all the groups (P < 0.05). Conclusion: High-temperature solutions caused alterations in certain properties of composites, such as increased color change, although they did not affect the hardness or roughness of the composite resin material tested.

scholarly journals Efectos de un programa de Zumba® sobre niveles de ansiedad-rasgo, ansiedad-estado y condición física en estudiantes universitarias chilenas

2020 ◽  
Vol 20 (3) ◽  
pp. 1-14
Author(s):  
Álvaro Huerta Ojeda ◽  
Guillermo Barahona-Fuentes ◽  
Sergio Galdames Maliqueo ◽  
Pablo Cáceres Serrano ◽  
Paula Ortiz Marholz
Keyword(s):  
Grip Strength ◽  
Control Group ◽  
Anxiety State ◽  
Group 12 ◽  
Anxiety Trait ◽  
Undergraduate Female ◽  
Salud Mental ◽  
Level Of Significance ◽  
And Control ◽  
Different Levels

Diversas investigaciones han determinado que la implementación de programas de actividad física mejora la salud mental. Sin embargo, aún existen dudas sobre los beneficios de los programas Zumba® en la población que lo practica. El propósito de este estudio fue determinar los efectos de un programa de ejercicio físico basado en Zumba®, sobre los niveles de ansiedad-rasgo y ansiedad-estado en estudiantes universitarias chilenas. Investigación cuantitativa cuasi-experimental, con una muestra de 22 estudiantes mujeres de pregrado (grupo experimental = 10 y grupo control = 12). Las variables fueron: ansiedad-rasgo (A-R) y ansiedad-estado (A-E), además de variables físicas como antropometría, consumo máximo de oxígeno (VO2máx) y fuerza prensil. El análisis estadístico se realizó a través de un ANOVA mixto para todas las variables. En nivel de significancia fue de p < 0,05. Los resultados evidenciaron cambios no significativos en los distintos niveles de A-R ni A-E luego de la aplicación del programa de Zumba® (p > 0,05), tampoco hubo cambios en las otras variables de estudio (p > 0,05). Al término de la intervención, no se observaron efectos del programa de Zumba® sobre los distintos niveles de A-R y A-E, como tampoco sobre variables antropométricas, VO2máx ni fuerza prensil. Several investigations have specified that the implementation of physical activity programs improve mental health. However, there are still doubts about the benefits on the population taking part in Zumba® programs. The purpose of this study was to determine the effects of a Zumba® based working out program on the levels of anxiety-trait and anxiety-state in Chilean university students. It was a quantitative, cuasi-experimental study with a sample of 22 undergraduate female students (experimental group = 10 and control group = 12). The variables were anxiety-trait (A-T) and anxiety-state (A-S), in addition to physical variables, such as anthropometry, maximum oxygen consumption (VO2max) and grip strength. A statistical analysis was performed through a mixed ANOVA. The level of significance for all analyses was p < 0.05. The results showed no significant changes in the different levels of A-T or A-S (p > 0.05), there were also no changes in the other variables (p > 0.05). At the end of the intervention, no effects of the Zumba® program were observed on the different levels of A-T and A-S, nor on anthropometric variables, VO2max or grip strength. Várias investigações determinaram que a implementação de programas de atividade física melhora a saúde mental. No entanto, ainda existem dúvidas sobre os benefícios dos programas Zumba® na população que pratica. O objetivo deste estudo foi determinar os efeitos de um programa de exercícios físicos baseado no Zumba®, sobre níveis de Ansiedade-Traço e Ansiedade-Estado em estudantes universitários chilenos. Pesquisa quantitativa quase experimental, com uma amostra de 22 estudantes do sexo feminino (grupo experimental [GE] = 10 e grupo controle [GC] = 12). As variáveis foram: Ansiedade-Traço (A-T) e Ansiedade-Estado (A-E), ambas avaliadas pelo STAI Trait State Anxiety Questionnaire, além de variáveis físicas como antropometria, consumo máximo de oxigênio (VO2máx) e força pré-trilateral. A análise estatística foi realizada através de uma ANOVA mista para todas as variáveis e uma tabela de contingência por meio do Qui-Quadrado de Pearson para os diferentes níveis de A-T e A-E. O nível de significância para todas as análises foi de p <0,05. Os resultados não mostraram alterações significativas em todas as variáveis do estudo após a aplicação do programa Zumba® (p> 0,05); também não houve diferenças nos diferentes níveis de A-T ou A-E (p> 0,05). Ao final da intervenção, não foram observados efeitos do programa Zumba® sobre diferentes níveis de A-R e A-E, nem nas variáveis antropométricas, VO2máx ou força preênsil.

scholarly journals Analysis of Chlorhexidine Modified Cement in Orthodontic Patients: A Double-Blinded, Randomized, Controlled Trial

2021 ◽  
Author(s):  
José Lucas dos Santos Araújo ◽  
Mariana Massi Afonso Alvim ◽  
Márcio José da Silva Campos ◽  
Ana Carolina Morais Apolônio ◽  
Fabíola Galbiatti Carvalho ◽  
...  
Keyword(s):  
Tooth Enamel ◽  
Controlled Trial ◽  
Glass Ionomer Cement ◽  
Color Stability ◽  
High Rate ◽  
Control Group ◽  
Time Intervals ◽  
Significant Difference ◽  
Salivary Ph ◽  
Orthodontic Patients

Abstract Objectives The aim of this study was to evaluate the microbiological and mechanical properties of glass ionomer cement (GIC) modified by chlorhexidine (CLX) for the purpose of cementing bands to the teeth of orthodontic patients. Materials and Methods Ten patients, between the ages of 19 and 33 years, in the initial stage of orthodontic treatment, were randomly designated to two groups using the split-mouth design (n = 10). One group (GICEX) had bands cemented with GIC modified by CLX and a Control group (GIC), evaluated at time intervals before (T0), 3 months (T3), and 6 months (T6) after cementation. Total microbiological counts were performed, and color stability of tooth enamel, salivary pH, and the adhesive remnant index (ARI) were evaluated. Statistical Analysis The Friedman and Dunn’s tests, Mann–Whitney, one-way analysis of variance, and Tukey, and paired and non-paired t-tests (p< 0.05) were used. Results In T3, there was evidence of significant reduction in the quantity of colony forming unit (CFU) in GICEX group in comparison with the Control (p = 0.041). In T6, the quantity of CFU was similar to the quantity in T3 and significantly different to control (p = 0.045); Control group demonstrated a similar quantity of CFU between the experimental time intervals (p = 0.066). Salivary pH demonstrated significant difference only between the time intervals T0 and T6 (p = 0.022). The tooth enamel color (p = 0.366) and ARI (p = 0.343) values demonstrated no significant changes. Conclusion The incorporation of CLX into GIC demonstrated effective antibacterial action, allowed a good bond of the cement to the enamel, a high rate of survival of the bands, did not change the color of the tooth enamel, and maintained the salivary pH at physiological levels.

scholarly journals New Method to Calculate the Level of Consistency of the Pauli & Kraepelin Tests

2018 ◽  
Author(s):  
Sigit Haryadi ◽  
Salma Huda California
Keyword(s):  
Mean Value ◽  
The Other ◽  
New Method ◽  
Other Hand ◽  
The Mean ◽  
Different Levels ◽  
Made In

In this paper, we proposed a modification of the measurement of the personality consistency level of the Pauli &amp; Kraepelin Test in the field of psychology, using the formula made in April 2016, by Sigit Haryadi, and named "the Harmony in Gradation" or “the Haryadi Index”. The purpose of this proposal is because the existing formula uses only the mean value of the deviation, which leads to the possibility that the result of consistency measurement on people whose facts are different levels of consistency will be considered to have the same consistency level, on the other hand, the proposed method will be more accurate and precise in terms of providing an assessment of the level of personality consistency of a person.

scholarly journals Role of enamel deminerlization and remineralization on microtensile bond strength of resin composite

2016 ◽  
Vol 10 (03) ◽  
pp. 376-380 ◽  
Author(s):  
Abbas Rizvi ◽  
Muhammad S. Zafar ◽  
Yasser Al-Wasifi ◽  
Wamiq Fareed ◽  
Zohaib Khurshid
Keyword(s):  
Bond Strength ◽  
Tooth Enamel ◽  
Resin Composite ◽  
Artificial Saliva ◽  
Testing Machine ◽  
Polarized Light ◽  
Study Groups ◽  
Control Group ◽  
Microtensile Bond Strength ◽  
Time Intervals

ABSTRACT Objective: This study is aimed to establish the microtensile bond strength of enamel following exposure to an aerated drink at various time intervals with/without application of remineralization agent. In addition, degree of remineralization and demineralization of tooth enamel has been assessed using polarized light microscopy. Materials and Methods: Seventy extracted human incisors split into two halves were immersed in aerated beverage (cola drink) for 5 min and stored in saliva until the time of microtensile bond testing. Prepared specimens were divided randomly into two study groups; remineralizing group (n = 70): specimens were treated for remineralization using casein phosphopeptides and amorphous calcium phosphate (CPP-ACP) remineralization agent (Recaldent™; GC Europe) and control group (n = 70): no remineralization treatment; specimens were kept in artificial saliva. All specimens were tested for microtensile bond strength at regular intervals (1 h, 1 days, 2 days, 1 week, and 2 weeks) using a universal testing machine. The results statistically analyzed (P = 0.05) using two-way ANOVA test. Results: Results showed statistically significant increase in bond strength in CPP-ACP tested group (P < 0.05) at all-time intervals. The bond strength of remineralizing group samples at 2 days (~13.64 megapascals [MPa]) is comparable to that of control group after 1 week (~12.44 MPa). Conclusions: CPP-ACP treatment of teeth exposed to an aerated drink provided significant increase in bond strength at a shorter interval compared to teeth exposed to saliva alone.

The Environmental Influence of Light Coke™, Phosphoric Acid, and Citric Acid on Elastomeric Chains

2008 ◽  
Vol 9 (7) ◽  
pp. 17-24 ◽  
Author(s):  
Leandro Teixeira ◽  
Betina do Rosário Pereira ◽  
Thais Gelatti Bortoly ◽  
João Armando Brancher ◽  
Odilon Guariza-Filho
Keyword(s):  
Citric Acid ◽  
Phosphoric Acid ◽  
Tooth Movement ◽  
Environmental Influence ◽  
Artificial Saliva ◽  
Decay Rates ◽  
Control Group ◽  
Force Decay ◽  
Significant Difference ◽  
Elastomeric Chains

Abstract Aim The purpose of this study was to evaluate the in vitro effect of Light Coke™, phosphoric acid, and citric acid on the force decline pattern of two types of elastomeric chains. Methods and Materials One hundred sixty gray colored elastomeric chain modules, 80 Chainette (GAC) and 80 Sunburst™ (GAC) chains, were divided into four groups for immersion into Light Coke, phosphoric acid, citric acid, and artificial saliva. The initial stretched force of the elastomeric chains ranged from 220gf to 250gf. During the experiment, all elastomeric chains were kept immersed in artificial saliva at 37°C (pH≈6.24) to simulate the oral environment. To simulate daily consumption of Light Coke, the elastomeric chains were immersed in the solutions twice a day for 15 minutes. The control group was kept immersed in artificial saliva continuously with no further treatment. Force (gf) was measured with a Dial-Type dynamometer (Dentaurum®), initially (baseline), 24 hours, 7, 14, and 21 days. Data were analyzed using the Tukey test at a 5% level of probability. Results A statistically significant reduction on the force produced by the elastomeric chains was seen at different time points. The greatest reduction in force occurred in the first 24 hours (p=0.01). Conclusion Force decay of the Chainette elastomeric chains were lower than the Sunburst™ chain (p<0.05). The immersion treatments caused no statistically significant difference in force for either chain module (p>0.05). Clinical Significance Good elastomeric chain properties are necessary for effective tooth movement, and knowledge of force-decay rates is an important factor in achieving the best orthodontic outcome. Citation Teixeira L, Pereira BP, Bortoly TG, Brancher JA, Tanaka OM, Guariza-Filho O. The Environmental Influence of Light Coke™, Phosphoric Acid, and Citric Acid on Elastomeric Chains. J Contemp Dent Pract 2008 November; (9)7:017-024.

Influence of Different Thickness of Zirconia Core on the Flexural Strength of Bilayered Ceramics in Artificial Saliva

2014 ◽  
Vol 602-603 ◽  
pp. 606-609
Author(s):  
Yan Li Zhang ◽  
Ruo Yu Liu ◽  
Xiao Li Feng ◽  
Liang Jiao Chen ◽  
Yao Kun Zhang ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Test Data ◽  
Artificial Saliva ◽  
Multiple Comparisons ◽  
The Other ◽  
Bending Test ◽  
Core Thickness ◽  
Different Thickness ◽  
One Way Anova ◽  
Made In

To study the effect of different core thickness on the flexural strength of zirconia and feldspathic ceramics. Bilayered zirconia-feldspathic samples of three commercial brands were made in three different thickness(n=10): 0.5 mm, 0.8 mm and 1.0 mm respectively. On zirconia core specimens of each thickness, feldspathic dentin porcelain was added to reach a total crown thickness of 2 mm. Samples were stored in artificial saliva with neutral pH for 10 days at 37°C. Flexural strength was conducted with 3-point bending test. Data were analyzed by one-way ANOVA, and multiple comparisons were performed using Student-Newman-Keuls test(α=0.05). The measurement of 1.0 mm group was higher than the other groups, and 0.5 mm group was the lowest(P＜0.05), regardless of any commercial brand. Commercial dental zirconia blocks had varied flexural strength, Zirkonzahn expressed highest value in any thickness group compared with the other materials. Moreover, the fracture mode of zirconia bilayered composites was different in this study, 0.5 mm and 0.8 mm groups exhibited higher number of fragments and appeared to delamination compared with 1.0 mm group. So we infer that the thickness of core can have an effect on the flexural strength of bilayered zirconia-feldspathic crown, as well as different kinds of materials.

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