Dataset Information

Comparison of the Force Released by Intermaxillary Elastics Used for Different Time Periods.

ABSTRACT: Objective:The objective of the present study was to compare the strength degradation of the force of intermaxillary elastic used for different periods. Methods:The sample included intermaxillary elastics used for 20 adult patients with bilateral Class II or III malocclusion in orthodontic treatment with fixed appliances, with a mean age of 27.25 years. Latex orthodontic elastics with 3/16 inch of diameter were used, with an average stretching of three times its diameter. The elastics were used in the same patient bilaterally for different periods, with each pair of elastics used for 1, 12, 24, and 48h. Thus, the sample consisted of 200 elastics, with 40 being used in each period (one pair used by each patient) and 40 new elastics without use tested as control. Elastics were tested using a universal testing machine, stretched with a velocity of 30 mm/min, and the force was evaluated in stretches of 15, 20, 25, and 30 mm. The degradation force was compared in the four different times of use and control by one-way ANOVA (analysis of variance) and Tukey tests. Results:There were significant differences among the groups in all evaluated stretches (15, 20, 25, and 30 mm). The control elastics presented higher average forces numerically and statistically significant for all tested times, except for the elastic used for 1h. The elastics used for 1, 12, and 24h had similar forces among them, with a significant difference to the elastics used for 48h. Conclusion:It is recommended to change the intermaxillary elastics after 24 h of use.

SUBMITTER: Nitrini ATL

PROVIDER: S-EPMC7018489 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Comparison of the Force Released by Intermaxillary Elastics Used for Different Time Periods.

Nitrini Andressa Tribulato Lopes ATL Chagas Adenilson Silva AS Freitas Karina Maria Salvatore KMS Valarelli Fabrício Pinelli FP Cançado Rodrigo Hermont RH de Oliveira Renata Cristina Gobbi RCG de Oliveira Ricardo Cesar Gobbi RCG

Turkish journal of orthodontics 20191201 4

<h4>Objective</h4>The objective of the present study was to compare the strength degradation of the force of intermaxillary elastic used for different periods.<h4>Methods</h4>The sample included intermaxillary elastics used for 20 adult patients with bilateral Class II or III malocclusion in orthodontic treatment with fixed appliances, with a mean age of 27.25 years. Latex orthodontic elastics with 3/16 inch of diameter were used, with an average stretching of three times its diameter. The elast ...[more]

PMID: 32110462

Similar Datasets

Project description:BackgroundThe high cost of training and the relatively long period of training for physicians make it beneficial to stimulate physicians to retire later. Therefore, a better understanding of the link between the factors influencing the decision to retire and actual turnover would benefit policies designed to encourage later retirement. This study focuses on actual GP turnover and the determining factors for this in the Netherlands. The period 2003-2007 saw fewer GPs retiring from general practice than the period 1998-2002. In addition, GPs' retirement age was higher in 2003-2007. For these two periods, we analysed work perception, objective workload and reasons for leaving, and related these with the probability that GPs would leave general practice at an early age.MethodsIn 2003, a first retrospective survey was sent to 520 self-employed GPs who had retired between 1998 and 2002. In 2008, the same survey was sent to 405 GPs who had retired between 2003 and 2007. The response rates were 60% and 54%, respectively. Analyses were done to compare work perception, objective workload, external factors and personal reasons for retiring.ResultsFor both male and female GPs, work perception was different in the periods under scrutiny: both groups reported greater job satisfaction and a lower degree of emotional exhaustion in the later period, although there was no notable difference in subjective workload. The objective workload was lower in the second period. Moreover, most external factors and personal reasons that may contribute to the decision to retire were reported as less important in the second period. There was a stronger decrease in the probability that female GPs leave general practice within one year than for male GPs. This underscores the gender differences and the need for disaggregated data collection.ConclusionsThe results of this study suggest that the decrease in the probability of GPs leaving general practice within one year and the increasing retirement age are caused by a decrease in the objective workload, a change in GPs' work perception, external factors and personal reasons. Based on the results of this study, we consider workload reduction policies are the most useful instruments to control retention and retirement.

Dataset Information

Comparison of the Force Released by Intermaxillary Elastics Used for Different Time Periods.

Publications

Comparison of the Force Released by Intermaxillary Elastics Used for Different Time Periods.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets