Apophyseal Injuries

Avulsion injuries are common among skeletally immature athletes because of the inherent weakness across the open apophysis 1 . The incidence of avulsion fractures is increasing, especially among 14 to 17 year olds, as a result of the growth in competitive sports participation. Avulsion fractures results from indirect trauma caused by sudden, violent, or unbalanced muscle contraction, and are most commonly associated with sports such as soccer, rugby, ice hockey, gymnastics, and sprinting, that...

Patient And Activityrelated Factors

Patients can return to an active lifestyle after successful THR, and these benefits extend beyond recreational pursuit. In one study 5 , many patients who were not previously active presurgically developed a healthy habit postoperatively of walking, cycling, swimming, or cross-country skiing. Ries and colleagues 6 noted an improvement in cardiovascular fitness 2 years after surgery, with an increase in maximum workload and oxygen metabolism. Macnicol and coworkers 7 reported improved gait...

Labral Tears

Hip Labrum Blood Supply

The etiology for labral tears can be from traumatic and degenerative causes, structural abnormalities from femoroacetabular impingement (cam and pincer Fig. 2. Limited blood supply to the labrum at the labrocapsular junction. Arthroscopic view of a hyperemic labrum. Fig. 2. Limited blood supply to the labrum at the labrocapsular junction. Arthroscopic view of a hyperemic labrum. Fig. 3. Arthroscopic view showing degenerative changes within the labrum. Fig. 3. Arthroscopic view showing...

Sportspecific Mechanisms Of Hip Injuries In The Athlete

As arthroscopic treatments of the hip continue to evolve, there is an increasing need to understand the basic performance biomechanics of the hip joint. This information is important, as it can provide the foundation by which joint function, pathology, and therapeutic modalities can be evaluated. There are a number of recent studies that have applied different approaches to study the hip biomechanics, particularity in THR. However, there is clearly a void in the amount of literature related to...

Radiologic Evaluation And Modality Overview

Piriformis Muscle Radiology

Plain film radiography remains the primary screening tool because it is widely available, simple, and relatively inexpensive but it must be done properly. In the past, a typical screening radiographic series for hip pain often included a nonweight-bearing anteroposterior (AP) and frogleg lateral view of the affected hip with or without a supine AP view of the pelvis. The goal of the screening test was to detect obvious sources of pathology such as advanced arthrosis, tumor, fracture, and...

Radiographic Evaluation And Measurements Of The

Ossicle Hip Ray

To identify more recently described findings of FAI, our radiographic hip protocol deviates from common past screening hip radiographs. The AP weight-bearing view of the pelvis and AP view of the hip provides multiple measure ments to assess acetabular coverage and orientation 1,20,21 . Radiographic measurements should be performed after a thorough assessment for subtle fractures or tumors, soft tissue, and intrapelvic anomalies, as well as sacroiliac, pubic symphyseal, and lower lumbar...

Electromyography Of Hip Musculature

EMG is a technique used to measure the electrical input excitation of a specific muscle. Considerable literature regarding EMG of the hip musculature for walking, climbing stairs, and various sporting motions has been reported. Due to space limitations and the completeness of data content, only the EMG of hip muscles during gait are presented below. Although EMG studies are valuable in determining which and when individual muscles are active, it is important to note that EMG cannot provide...