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BACKGROUND Sternoclavicular joint (SCJ) instability is relatively rare. Surgical treatment may be considered for severely displaced dislocations or symptomatic recurrent anterior instability. The purpose of this study was to describe an SCJ ligament reconstruction technique and retrospectively evaluate its safety and effectiveness for treating anterior SCJ(More)
BACKGROUND The risk of tear of the intact anterior cruciate ligament in the contralateral knee after anterior cruciate ligament reconstruction of the opposite knee and the incidence of rupturing the anterior cruciate ligament graft during the first 2 years after surgery have not been extensively studied in a prospective manner. Clinicians have hypothesized(More)
CONTEXT Total hip arthroplasty is a common surgical procedure but little is known about longitudinal trends. OBJECTIVE To examine demographics and outcomes of patients undergoing primary and revision total hip arthroplasty. DESIGN, SETTING, AND PARTICIPANTS Observational cohort of 1,453,493 Medicare Part A beneficiaries who underwent primary total hip(More)
The number of people participating in sports continues to increase. The relationship between sports participation, joint injury, and subsequent osteoarthritis is complex. A history of joint injury and participation in high joint loading sports increases the risk of subsequent osteoarthritis changes in affected joints. The impact of osteoarthritis on sports(More)
CONTEXT Total knee arthroplasty (TKA) is one of the most common and costly surgical procedures performed in the United States. OBJECTIVE To examine longitudinal trends in volume, utilization, and outcomes for primary and revision TKA between 1991 and 2010 in the US Medicare population. DESIGN, SETTING, AND PARTICIPANTS Observational cohort of 3,271,851(More)
Anterior cruciate ligament (ACL) reconstruction is a common surgical knee procedure that requires intensive postoperative rehabilitation by the patient. A variety of randomized controlled trials have investigated aspects of ACL reconstruction rehabilitation. A systematic review of English language level 1 and 2 studies identified 54 appropriate randomized(More)
Despite the popularity of surgical repair of rotator cuff tears, literature regarding the indications for and timing of surgery are sparse. We performed a systematic review of the literature to investigate factors influencing the decision to surgically repair symptomatic, full-thickness rotator cuff tears. Specifically, how do demographic variables,(More)
BACKGROUND Total hip arthroplasty is a common surgical procedure, but little is known about longitudinal trends in associated adverse outcomes. Our objective was to describe long-term trends in demographics, comorbidities, and adverse outcomes for older patients who underwent primary and revision total hip arthroplasty. METHODS We identified a(More)
Anterior cruciate ligament (ACL) reconstruction is a common surgical knee procedure that requires intensive postoperative rehabilitation by the patient. A variety of randomized controlled trials have investigated aspects of ACL reconstruction rehabilitation. A systematic review of English language level 1 and 2 studies identified 54 appropriate randomized(More)
Neuronal connectivity is established by the axo-dendritic polarity, correct guidance and targeting of neurons. Unlike for axons, the mechanisms responsible for directed outgrowth of dendrites are not well understood. Using single-cell labeling, we describe specific guidance defects in dendrites of identified neurons in frazzled, robo, netrin and(More)