Triceps surae muscle-tendon unit mechanical property changes during 10 minutes of streching.

OBJECTIVE: To verify the effect of 10-min static stretching on the triceps surae mechanical properties. DESIGN: Quasi-experimental one-group pre test-post test study compared the time points of before, after, and minute by minute of one session of triceps surae passive static stretching. METHODS: 15 participants performed a 10-min plantar flexor passive static stretching on the isokinetic dynamometer. We evaluated passive torque and myotendinous junction (MTJ) displacement before, minute by minute, and after the intervention. In contrast, we evaluated the range of motion (ROM), passive torque, MTJ displacement, and hysteresis before and after the intervention. Paired t-test compared pre and post-intervention time points. Passive torque and MTJ displacement in the minute-by-minute evaluations were compared by repeated measures one-way ANOVA with a Bonferroni post-hoc test. RESULTS: ROM increased (effect size d = 0.56) and passive torque and muscle-tendon unit stiffness decreased (effect size d = 0.65 and d = 0.73, respectively) post-stretching. There was a reduction only in passive torque in the minute-by-minute evaluation, mainly at minutes five and seven. CONCLUSIONS: passive torque decreased over a 10-min static stretching session of the ankle plantar flexors, followed by a ROM increase and muscle-tendon unit, a stiffness decrease.

Uso do endoactivator no tratamento endodôntico / Use of the endoactivator in endodontic treatment

Introdução: a irrigação é uma das etapas essenciais no preparo biomecânico e, buscando aumentar a eficiência desta, novos métodos vem sendo empregados no intuito de melhorar a ação e o alcance das soluções irrigadoras. Objetivo: analisar a eficácia do sistema EndoActivator em várias etapas do tratamento endodôntico. Resultados e discussão: apesar de diferenças de metodologias na literatura, o EndoActivator apresentou bons resultados em comparação com a irrigação convencional quando empregado em diferentes fases do tratamento endodôntico. Conclusão: o sistema EndoActivator é seguro e eficaz durante o preparo biomecânico, porém, assim como outros dispositivos de agitação mecânica da solução irrigante, não é capaz de promover completa limpeza dos canais radiculares.

Introduction: the irrigation is an essential part of biomechanical preparation and seeking increase the efficiency of this, new methods have been used in order to expand the effect of irrigating solutions, and promote the reach for areas with difficult access. Objective: the objective of this literature review was to analyze the effectiveness of the EndoActivator system in several stages of endodontic treatment. Results and Discussion: despite differences in methodologies in the literature, the EndoActivator presented good results in comparison to conventional irrigation when used in different phases of endodontic treatment. Conclusion: the EndoActivator system is safe and effective during biomechanical preparation, but, like other mechanical agitation devices of the irrigating solution, it is not able to promote complete cleaning to root canals.