Femoral internal torsion greater than twenty-five degrees and/or external tibial torsion greater than thirty degrees as measured by computed tomography are threshold values for axial alignment correction in patellofemoral instability.

Objectives: Patellofemoral instability (PFI) has multiple predisposing anatomic factors, including ligamentous hyperlaxity, coronal and axial malalignment, patella alta, trochlea dysplasia, excessive lateral patellar tilt, and excessive lateral Q vector. Yet, few studies have analyzed surgical thresholds for performing axial alignment corrective osteotomies in the treatment of PFI and patella maltracking. The objective of this systematic literature review was to determine if there is a threshold for axial plane alignment that triggers surgical correction for the treatment of patellar instability in the published literature.

Major complications after total hip arthroplasty with the direct anterior approach at a high-volume Ontario tertiary care centre.

Background: The rate of major surgical complications for high-volume orthopedic surgeons using the direct anterior approach (DAA) in Ontario, Canada, is not known. The purpose of this study was to investigate the rate of major surgical complications after total hip arthroplasty (THA) using DAA performed by experienced orthopedic surgeons at a high-volume tertiary care centre in Ontario.

Methods: We conducted a retrospective cohort review of primary THA through DAA performed by 2 experienced fellowship-trained surgeons at an academic hospital in London, Ontario, between Jan.

Botox Injections in Paraspinal Muscles Result in Low Maximal Specific Force and Shortening Velocity in Fast but Not Slow Skinned Muscle Fibers.

Study Design: Basic science, experimental animal study.

Objective: To determine the effects of Botulinum toxin type A (BTX-A) injections on the mechanical properties of skinned muscle fibers (cells) of rabbit paraspinal muscles.

Summary Of Background Data: BTX-A has been widely used in the treatment of disorders of muscle hyperactivity, such as spasticity, dystonia, and back pain.

Force properties of skinned cardiac muscle following increasing volumes of aerobic exercise in rats.

The positive effects of chronic endurance exercise training on health and performance have been well documented. These positive effects have been evaluated primarily at the structural level, and work has begun to evaluate mechanical adaptations of the myocardium. However, it remains poorly understood how the volume of exercise training affects cardiac adaptation.

Quantifying the Effects of Different Treadmill Training Speeds and Durations on the Health of Rat Knee Joints.

Background: Walking and running provide cyclical loading to the knee which is thought essential for joint health within a physiological window. However, exercising outside the physiological window, e.g.

A clinic-supported group exercise program for head and neck cancer survivors: managing cancer and treatment side effects to improve quality of life.

Purpose: The purpose of the evaluation of this clinic-supported 12-week progressive strength-training program was to assess the feasibility and impact of an exercise intervention for head and neck cancer (HNC) survivors.

Methods: Recruitment and adherence feasibility, as well as health-related fitness measures and patient-reported symptom management were assessed on the 21 HNC survivors in the exercise program.

Results: Overall, this program was feasible, as indicated by recruitment, adherence, and safety outcomes.