“Safety and performance of biodegradable magnesium-based implants in children and adolescents.”

Injury ◽  
2022 ◽  
Author(s):  
Andreas Rehm ◽  
Luke Granger ◽  
C.Y. Joshua ◽  
Elizabeth Ashby
Injury ◽  
2021 ◽  
Author(s):  
Julian Stürznickel ◽  
Maximilian M. Delsmann ◽  
Oliver D. Jungesblut ◽  
Ralf Stücker ◽  
Christian Knorr ◽  
...  

PLoS ONE ◽  
2013 ◽  
Vol 8 (12) ◽  
pp. e85168 ◽  
Author(s):  
Karen Lidzba ◽  
Kathina Ebner ◽  
Till-Karsten Hauser ◽  
Marko Wilke

1996 ◽  
Vol 13 (3) ◽  
pp. 157-170 ◽  
Author(s):  
Margaret K. Warren ◽  
Thomas H. Ollendick ◽  
Neville J. King

A large sample of children and adolescents were screened for test anxiety using the Test Attitude Inventory (Spielberger, 1980). Subjects with low and high test anxiety were then compared on self-report measures of trait anxiety, depression, and fear and then asked to report their thoughts and level of distress following an imagined test. Academic grades and performance on standardised achievement and ability tests were also obtained. High test-anxious children and adolescents reported higher levels of trait anxiety, depression, and fear as well as greater distress and cognitive interference during the imagined test. They also obtained lower grades and performed more poorly on the standardised measures. Age effects moderated these findings. Discussion focuses on the clinical and developmental implications of the findings.


PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0254899
Author(s):  
Yasuaki Kusumoto ◽  
Kenji Takaki ◽  
Tadamitsu Matsuda ◽  
Osamu Nitta

Objective Manual ability is considered one of the factors that can predict functional independence in activities of daily living. For evaluating personal tasks such as self-care, the Pediatric Evaluation of Disability Inventory (PEDI) comprises/introduces/offers a set of useful measures that assist in enhancing the capability for self-care among children and adolescents with cerebral palsy (CP). The aim of this study was to investigate the relevant factors of self-care capability and performance in children and adolescents with spastic CP. Methods This was a cross-sectional study. Seventy-six children and adolescents with spastic CP (between 5 and 18 years of age), representing levels I to IV of the Gross Motor Function Classification System-Expanded & Revised version (GMFCS), were analyzed. Multiple linear regression analysis with forward stepwise selection was conducted to examine which determinants were related to self-care capability and performance. Independent variables were age, CP type, GMFCS, Manual Ability Classification System, Box and Block Test, and grip strength in the dominant and non-dominant hands. Dependent variables were scores for the PEDI Functional Skills Scale and the PEDI Caregiver Assistance Scale. Results Results of the multiple regression analysis showed that the PEDI Functional Skills scale scores were correlated with the Box and Block Test in the dominant hand and GMFCS (Adjusted R2 = 0.69). The PEDI Caregiver Assistance Scale scores were correlated with the Box and Block Test in the dominant hand, GMFCS, and age (adjusted R2 = 0.71). Conclusion When considering self-care of children and adolescents with spastic CP, it is necessary to consider the evaluation of upper limb dysfunction in addition to GMFCS.


2020 ◽  
Vol 28 (4) ◽  
pp. 507-517
Author(s):  
Volker Scheer ◽  
Stefania Di Gangi ◽  
Elias Villiger ◽  
Pantelis T. Nikolaidis ◽  
Thomas Rosemann ◽  
...  

2021 ◽  
pp. 194173812110560
Author(s):  
Kyle C. Pierce ◽  
W. Guy Hornsby ◽  
Michael H. Stone

The involvement of youth in the sport of weightlifting and the use of weightlifting methods as part of training for youth sport performance appears to be increasing. Weightlifting for children and adolescents has been criticized in some circles and is a controversial aspect of resistance training for young people. Although injuries can occur during weightlifting and related activities, the incidence and rate of injury appear to be relatively low and severe injury is uncommon. A number of performance, physical, and physiological variables, such as body composition, strength, and power, are improved by weightlifting training in children, adolescents, and young athletes. Manipulating program variables, when appropriate, can have a substantial and profound influence on the psychological, physiological, physical, and performance aspects of weightlifters. An understanding of the sport, scientific training principles, and musculoskeletal growth development is necessary to properly construct a reasonable and appropriate training program. A scientific background aids in providing an evidenced basis and sound rationale in selecting appropriate methods and directing adaptations toward more specific goals and enables the coach to make choices about training and competition that might not otherwise be possible. If weightlifting training and competition are age group appropriate and are properly supervised, the sport can be substantially safe and efficacious.


Author(s):  
Volker Scheer ◽  
Stefania Di Gangi ◽  
Elias Villiger ◽  
Thomas Rosemann ◽  
Pantelis T. Nikolaidis ◽  
...  

Ultra-endurance running is of increasing popularity in the adult population, mainly due to master runners older than 35 years of age. However, youth runners younger than 19 years of age are also competing in ultra-endurance events, and an increase has been observed in distance-limited events, but no data is available on time-limited ultra-endurance events in this age group. This study investigated participation and performance trends in time-limited ultra-endurance races, including multi-day events, in runners younger than 19 years of age. Between the period 1990 and 2018, the most popular events recorded a total of 214 finishes (from 166 unique finishers (UF)) for 6-h events, 247 (212 UF) for 12-h events, and 805 (582 UF) for 24-h events, respectively. The majority of athletes originated from Europe and North America. Only a minority participated in multi-day events. Overall, speed increased with age, but the overall performance speed decreased across calendar years for 6- and 24-h events as participation numbers grew. In summary, in youth ultra-endurance runners, differences were observed regarding participation and performance across the different time-limited events, the age of the athletes and their country of origin


Coatings ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 8
Author(s):  
Taolei Wang ◽  
Chao Lin ◽  
Dan Batalu ◽  
Jingzhou Hu ◽  
Wei Lu

Hydroxyapatite coatings have been widely used to improve the corrosion resistance of biodegradable magnesium alloys. In this paper, in order to manufacture the ideal hydroxyapatite (HA) coating on the ZK60 magnesium substrate by hydrothermal method, formation mechanism of enhanced hydroxyapatite (HA) coatings, influence of pH values of the precursor solution on the HA morphology, corrosion resistance and cytotoxicity of HA coatings have been investigated. Results show that the growth pattern of the HA is influenced by the local pH value. HA has a preferential c-axis and higher crystallinity in the alkaline environment developing a nanorod-like structure, while in acid and neutral environments it has a preferential growth along the a(b)-plane with a lower crystallinity, developing a nanosheet-like structure. The different morphology and microstructure lead to different degradation behavior and performance of HA coatings. Immersion and electrochemical tests show that the neutral environment promote formation of HA coatings with high corrosion resistance. The cell culture experiments confirm that the enhanced corrosion resistance assure the biocompatibility of the substrate-coating system. In general, the HA coating prepared in neutral environment shows great potential in surface modification of magnesium alloys.


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