OBJECTIVES This in-vitro study aimed at evaluating the effect of three debonding sequences on the shear bond strength (SBS) of new stainless steel (SS) brackets. MATERIALS AND METHODS Stainless steel twin brackets (0.022-inch, American Orthodontics, Sheboygan, WI, USA) were bonded with light cure adhesive (Transbond XT, 3M Unitek, St. Paul, MN, USA) to 80 newly extracted human premolars after...

Post-activation potentiation (PAP) has been shown to acutely amplify muscular power output and may be advantageous for athletes looking to improve performance. PAP may have an acute window of effectiveness between 2 to 20 min. With correct timing and implementation it may be possible to induce PAP in competitive situations. The purpose of this study was to examine the time frame of potentiation...

Abstract Introduction: Regular physical activity is very effective in preventing or delaying chronic diseases and premature death in the elderly. Objective: This study aimed to compare the effect of face-to-face education and e-learning methods on the physical activity of the elderly. Materials and Methods: This is a quasi-experimental study conducted in Karaj, Iran in 2018. The participants...

background: primary dysmenorrhea is the most common cyclic pelvic pain and is also the most common gynecological problem worldwide and affects quality of life. the present study aimed to investigate the effect of isometric exercises on intensity and duration of pain and level of anxiety in the students with primary dysmenorrhea. materials and methods : in this randomized controlled clinical tri...

Background and aims. Different materials have been used for root-end filling during surgical endodontic treatment. The aim of this in vitro study was to evaluate the dye penetration in different thicknesses of calcium enriched mixture (CEM) cement as root-end filling material. Materials and methods. Following root canal filling in 70 extracted human single-rooted premolar teeth, the apical 3 mm...

the aim of the present study was to investigate the manipulation of senses and speed on the performance of bimanual dynamic coordination. thus, 15 physical education students of shahid beheshti university with age range of 18-25 years performed in-phase and anti-phase patterns from slow to fast speed in five different sensory conditions. to investigate two motor patterns anova with repeated mea...

The aim of the study was to compare maximal and submaximal cardiorespiratory responses between progressive tests on a treadmill on land (TRE), and stationary running on land (SRL) and in water (SRW), while also comparing two methods of determining the second turn point (ST) (ventilatory curve and heart rate deflection point). The study sample consisted of nine active women (23 ± 1.94 years) tha...

the aim of this study was to survey the effect of arousal by the presence of audience and music and their comparison on learning and performance of basketball dribbling. subjects were 36 healthy and non-athlete girls (mean and sd of age 21.8±2.23 years, height 163.4±6.19cm and weight 57.5±10.13kg) were divided into three groups of audience (n=12), music (n = 12) and control (n = 12) randomly. t...