Progression of patellar tendinitis following treatment with platelet-rich plasma: case reports.

Purpose: The use of platelet-rich plasma (PRP) is becoming more attractive given its favourable side effect profile and autologous nature, leading to rapid clinical adoption in the absence of high-level evidence. We are presenting three patients who developed a progression of patellar tendinitis following treatment, which to our knowledge is the first report of worsening of patellar tendinitis following PRP therapy.

Methods: The records of three patients with symptom exacerbation of patellar tendinitis following treatment with PRP were reviewed.

Operative management of partial-thickness tears of the proximal hamstring muscles in athletes.

Background: Partial tears of the hamstring muscle origin represent a challenging clinical problem to the patient and orthopaedic surgeon. Although nonoperative treatment is frequently met with limited success, there is a paucity of data on the efficacy of surgical management for partial proximal hamstring tears in the active and athletic population.

Purpose: To evaluate the results of an anatomic repair for partial tears of the hamstring muscle origin in athletes.

Use of thermography and fluorescein angiography in the management of a Chilean flamingo with avascular necrosis of the wing.

A Chilean flamingo (Phoenicopterus chilensis) was presented to the veterinary clinic at the North Carolina Zoological Park for evaluation of acute weakness of the right wing. Results of a physical examination revealed a lack of a palpable pulse in the radial artery, which suggested occlusion or obstruction of the vessel. Radiography, thermography, and fluorescein angiography confirmed right wing injury and vascular compromise.

Combined ACL-posterolateral corner injury in a skeletally immature athlete.

Combined injury to the anterior cruciate ligament (ACL) and posterolateral structures of the knee is a rare yet increasingly recognized clinical entity. In children or adolescents with open growth plates, this injury pattern is considered to be even more rare than in adults. Because knee ligaments are felt to be stronger than the adjacent physeal plates, the energy of pathologic translational and rotatory stress commonly results in fracture or avulsion injuries rather than ligamentous injury.

ACL graft healing and biologics.

Operative reconstruction of a torn anterior cruciate ligament (ACL) has become the most broadly accepted treatment. An important, but underreported, outcome of ACL reconstruction is graft failure, which poses a challenge for the orthopedic surgeon. An understanding of the tendon-bone healing and the intra-articular ligamentization process is crucial for orthopedic surgeons to make appropriate graft choices and to be able to initiate optimal rehabilitation protocols after surgical ACL reconstruction.

Magnetic resonance imaging of acute patellar dislocation in children: patterns of injury and risk factors for recurrence.

Background: Acute patellar dislocation is a common traumatic condition of the knee seen in the active adolescent. The patterns of injury to the ligamentous and chondral surfaces following dislocation have not been well defined in the pediatric population. The purpose of this study was to characterize the patterns of medial patellofemoral ligament (MPFL), vastus medialis obliqus (VMO), and osteochondral injury on magnetic resonance imaging (MRI) following first-time acute lateral patellar dislocation in pediatric patients.

Anatomy and biomechanics of the posterior cruciate ligament, medial and lateral sides of the knee.

The evaluation and management of posterior cruciate ligament (PCL) injuries presents a clinical challenge to even the most experienced orthopedic surgeons. Increasing emphasis has also been placed on the diagnosis of associated ligamentous and cartilaginous injuries that may contribute to patterns of instability not solely attributed to the PCL deficiency. Although a uniformly accepted surgical technique to restore the anatomy and biomechanics of the multiligament injured knee does not exist, careful identification and management of additional ligamentous injuries are critical in achieving optimum results and avoid further insult or degradation of the knee joint owing to continued instability.

A clinically relevant review of hip biomechanics.

The hip is a complex anatomic structure composed of osseous, ligamentous, and muscular structures responsible for transferring the weight of the body from the axial skeleton into the lower extremities. This must be accomplished while allowing for dynamic loading during activities such as gait and balance. The evaluation of hip pain and periarticular pathology can be challenging because of the complex local anatomy and broad differential diagnosis.

Nandrolone decanoate and load increase remodeling and strength in human supraspinatus bioartificial tendons.

Background: To date, no studies document the effect of anabolic steroids on rotator cuff tendons.

Study Design: Controlled laboratory study.

Hypothesis: Anabolic steroids enhance remodeling and improve the biomechanical properties of bioartificially engineered human supraspinatus tendons.