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STUDY DESIGN In vitro study to determine occupational radiation exposure during lumbar fluoroscopy. OBJECTIVES To assess radiation exposure to the spine surgeon during fluoroscopically assisted thoracolumbar pedicle screw placement. SUMMARY OF BACKGROUND DATA Occupational radiation exposure during a variety of fluoroscopically assisted musculoskeletal(More)
BACKGROUND The incidence of shoulder and elbow injuries in adolescent baseball players is rapidly increasing. One leading theory about this increase is that breaking pitches (such as the curveball) place increased moments on the dominant arm and thereby increase the risk of injury. HYPOTHESIS There is no difference in the moments at the shoulder and elbow(More)
STUDY DESIGN Retrospective. OBJECTIVE To demonstrate a relationship between adolescent idiopathic scoliosis Cobb angle measurements obtained with standing plain radiographs and standard supine magnetic resonance (MR) images. SUMMARY OF BACKGROUND DATA Patients with adolescent idiopathic scoliosis are exposed to repeated doses of ionizing radiation(More)
BACKGROUND Baseball professionals believe that pitching from a mound can increase the stresses placed on the body. HYPOTHESIS There is no difference in kinematics or kinetics in pitching from a mound versus flat-ground conditions in adolescent baseball pitchers. STUDY DESIGN Laboratory investigation. METHODS The fastball pitching motions of 15(More)
BACKGROUND The incidence of upper extremity injuries in baseball pitchers is increasing. Over the past decade there has been a great deal of research attempting to elucidate the cause of these injuries, focusing mainly on the mechanics of the pitching arm with no examination of other key segments, such as the trunk. This is surprising, as coaches will often(More)
A better understanding of gait dysfunction for children and youth with Charcot-Marie-Tooth (CMT) will assist in developing appropriate treatments and understanding prognosis for ambulation. The purpose of this retrospective study was to document the typical gait patterns in children and youth (12±4 years) with CMT using motion analysis and relate these(More)
Documentation of the lower extremity motion patterns of adolescent pitchers is an important part of understanding the pitching motion and the implication of lower extremity technique on upper extremity loads, injury and performance. The purpose of this study was to take the initial step in this process by documenting the biomechanics of the lower(More)
BACKGROUND/AIMS Multilevel surgical intervention is a common approach for the correction of gait abnormalities in children with cerebral palsy (CP). The short-term outcomes for the combination of rectus femoris transfer, hamstring lengthening and gastrocnemius lengthening have been well documented using three-dimensional motion analysis. However, the impact(More)
PURPOSE The purpose of our study was to investigate the relation between posterior tibial slope and anterior cruciate ligament (ACL) rupture in patients with open physes. METHODS A retrospective case-control study was performed comparing skeletally immature patients with an ACL rupture with an age-matched control group. Posterior tibial slope was measured(More)
STUDY DESIGN Prospective study. OBJECTIVE Evaluate the impact of the distal fusion level on overall spine motion in patients with adolescent idiopathic scoliosis. SUMMARY OF BACKGROUND DATA In the surgical treatment of adolescent idiopathic scoliosis, the impact of incorporating a single additional distal lumbar fusion level on residual spinal motion is(More)