BACKGROUND: Identifying risk factors for inferior outcomes after anterior cruciate ligament reconstruction (ACLR) is important for prognosis and future treatment.

HYPOTHESIS: Articular cartilage lesions and meniscus tears/treatment would predict International Knee Documentation Committee (IKDC) score, Knee injury and Osteoarthritis Outcome Score (KOOS) (all 5 subscales), and Marx activity level at 6 years after ACLR.

STUDY DESIGN: Cohort study (prognosis); Level of evidence, 1.

METHODS: ...

BACKGROUND: Most surgeons believe that graft choice for anterior cruciate ligament (ACL) reconstruction is an important factor related to outcome; however, graft choice for revision may be limited due to previously used grafts.

HYPOTHESES: Autograft use would result in increased sports function, increased activity level, and decreased osteoarthritis symptoms (as measured by validated patient-reported outcome instruments). Autograft use would result in decreased graft failure and ...

BACKGROUND: At the time of anterior cruciate ligament (ACL) reconstruction, there are usually concurrent meniscal and articular cartilage injuries. It is unclear if there is a significant difference between intra-articular injuries at the time of a primary ACL reconstruction compared with revision ACL reconstruction.

PURPOSE: To compare the meniscal and articular cartilage injuries found at the time of primary and revision ACL reconstruction surgery and to determine associations between ...

BACKGROUND: Although magnetic resonance imaging (MRI) is a standard method of assessing the extent and features of rotator cuff disease, the authors are not aware of any studies that have assessed the interobserver agreement among orthopaedic surgeons reviewing MRI scans for rotator cuff disease.

HYPOTHESIS: Fellowship-trained orthopaedic shoulder surgeons will have good interobserver agreement in predicting the more salient features of rotator cuff disease such as tear type (full ...

BACKGROUND: Knee laxity in the setting of suspected anterior cruciate ligament (ACL) injury is frequently assessed through physical examination using the Lachman, pivot-shift, and anterior drawer tests. The degree of laxity noted on these examinations may influence treatment decisions and prognosis.

HYPOTHESIS: Increased preoperative knee laxity would be associated with increased risk of subsequent revision ACL reconstruction and worse patient-reported outcomes 2 years ...

Many clinicians believe that the results of revision anterior cruciate ligament (ACL) reconstruction compare unfavorably with primary ACL reconstruction. However, few prospective studies have evaluated revision ACL reconstruction using validated patient-based metrics. This study was performed to evaluate and compare the results of revision ACL reconstruction and primary ACL reconstruction. The Multicenter Orthopaedic Outcomes Network consortium is an NIH-funded, hypothesis-driven, ...

BACKGROUND: Surgeons and health care systems have received a call to action in an effort to curtail the current opioid epidemic.

PURPOSE: To (1) define the natural history of opioid demand after anterior cruciate ligament reconstruction (ACLR), (2) consider how filling preoperative opioid prescriptions affects opioid demand after ACLR, and (3) evaluate the effect of additional procedures during ACLR and patient age on postoperative opioid demand.

STUDY DESIGN: Cohort study; Level of ...

OBJECTIVE: The study was conducted to quantify activity level 2 years after anterior cruciate ligament reconstruction and identify explanatory variables measured at baseline (demographics, concomitant meniscal/articular cartilage injuries and their treatment) associated with activity level at short-term follow-up (2 years).

STUDY DESIGN: Cohort study; Level of evidence, 2.

METHODS: In 2002, the Multicenter Orthopaedic Outcomes Network (MOON) consortium began enrolling patients undergoing ...

BACKGROUND: Increased knee pain at the time of anterior cruciate ligament reconstruction may potentially predict more difficult rehabilitation, prolonged recovery, and/or be predictive of increased knee pain at 2 years.

HYPOTHESIS: A bone bruise and/or other preoperative factors are associated with more knee pain/symptoms at the time of index anterior cruciate ligament reconstruction, and the presence of a bone bruise would be associated with specific demographic and injury-related ...

BACKGROUND: Shoulder instability is a relatively common condition occurring in 2% of the population. PROMIS (Patient-Reported Outcome Measurement Information System) was developed by the National Institutes of Health in an effort to advance patient-reported outcome (PRO) instruments by developing question banks for major health domains.

PURPOSE: To compare PROMIS instruments to current PRO instruments in patients who would be undergoing operative intervention for recurrent shoulder ...

PURPOSE: To determine which patient and injury factors are associated with the detection of high-grade laxity on examination under anesthesia before anterior cruciate ligament (ACL) reconstruction.

METHODS: We identified 2,318 patients who underwent primary ACL reconstruction without associated ligament injuries. Demographic data and information regarding meniscal tears were collected. Patients with high-grade Lachman (difference from contralateral side >10 mm), pivot-shift ...

Data from large prospectively collected anterior cruciate ligament (ACL) cohorts are being utilized to address clinical questions regarding ACL injury demographics and outcomes of ACL reconstruction. These data are affected by patient and injury factors as well as surgical factors associated with the site of data collection. The aim of this article is to compare primary ACL reconstruction data from patient cohorts in the United States and Norway, demonstrating the similarities and ...

BACKGROUND: The emergence of specialty orthopaedic hospitals has generated widespread controversy, but little is known about the quality of care they deliver. Our objective was to compare the characteristics and outcomes of patients undergoing major joint replacement in specialty orthopaedic and general hospitals.

METHODS: We conducted a retrospective cohort study of 51,788 Medicare beneficiaries who underwent total hip replacement and 99,765 who underwent total knee replacement in ...

BACKGROUND: Anterior cruciate ligament (ACL) reinjury results in worse outcomes and increases the risk of posttraumatic osteoarthritis.

PURPOSE: To identify the risk factors for both ipsilateral and contralateral ACL tears after primary ACL reconstruction (ACLR).

STUDY DESIGN: Cohort study; Level of evidence, 3.

METHODS: Data from the Multicenter Orthopaedic Outcomes Network (MOON), a prospective longitudinal cohort, were used to identify risk factors for ACL retear. Subjects with ...

BACKGROUND: Knees undergoing revision anterior cruciate ligament (ACL) reconstruction typically have more intra-articular injuries than do knees undergoing primary reconstruction.

HYPOTHESIS: Previous partial meniscectomy (PM) is associated with a higher rate of chondral lesions at revision ACL reconstruction, whereas previous meniscal repair (MR) is not associated with a higher rate of chondral lesions at revision ACL reconstruction, compared with knees undergoing revision ACL with no ...