Simulated Cam Morphology of the Hip Changes Sacroiliac Motion During Hip Motion and Loading in a Cadaveric Model.

Purpose: To determine the relationship between cam morphology of the hip and ipsilateral sacroiliac motion compared to the native hip in a cadaveric model.

Methods: A simulated cam state was created using a 3-dimensional printed cam secured to the head-neck junction of 5 cadaveric hips. Hips were studied using a computed tomography-based optic metrology system and a 6 degree-of-freedom robot to exert an internal rotation torque at 3 different torque levels (6 N-m, 12 N-m, 18 N-m).

Early adverse outcomes remain challenging to prevent in morbidly obese patients undergoing total hip arthroplasty.

Aims: The prevalence of obesity is increasing substantially around the world. Elevated BMI increases the risk of complications following total hip arthroplasty (THA). We sought to evaluate trends in BMI and complication rates of obese patients undergoing primary THA over the last 30 years.

Outcomes of Obese Patients Undergoing Primary Total Knee Arthroplasty: Trends Over 30 Years.

Background: The rates of obesity among patients undergoing total knee arthroplasty (TKA) have substantially increased. In addition, obesity is a well-established risk factor for complications after TKA. The purpose of this study was to analyze trends in body mass index (BMI) and complication risk among obese patients undergoing primary TKA treated at a single institution over 3 decades.

Osteochondritis Dissecans of the Capitellum of the Elbow: Improved Outcomes in Surgically Treated Versus Nonoperatively Treated Patients at Long-Term Follow-up.

Purpose: To (1) report the long-term outcomes associated with both operative and nonoperative management of capitellar osteochondritis dissecans (OCD), (2) identify factors associated with failure of nonoperative management, and (3) determine whether delay in surgery affects final outcomes.

Methods: All patients who received a diagnosis of capitellar OCD from 1995-2020 within a geographic cohort were included. Medical records, imaging studies, and operative reports were manually reviewed to record demographic data, treatment strategies, and outcomes.

The Association Between Preoperative International Normalized Ratio Values and Postoperative Outcomes including Mortality in Geriatric Femoral Neck Fractures Treated With Hemiarthroplasty.

Objectives: To evaluate the association between preoperative international normalized ratio (INR) and postoperative mortality and other outcomes after hemiarthroplasty for geriatric femoral neck fractures.

Design: Retrospective cohort study.

Setting: A single Level-I trauma center.

Incidence and Epidemiology of Symptomatic Capitellar Osteochondritis Dissecans of the Elbow: A United States Population-Based Study Over a 25-Year Period.

Background: There are limited data on the incidence of capitellar osteochondritis dissecans (OCD) in the United States (US) population.

Purpose: To determine the incidence of symptomatic capitellar OCD in a representative US subpopulation and identify changes in its incidence over time and to investigate the relationship between the incidence of capitellar OCD and patient sex and age.

Study Design: Descriptive epidemiology study.

Recent Antibiotic Treatment Impacts Serum and Synovial Laboratory Values in Early Periprosthetic Joint Infection Workup.

Background: Accurately detecting early postoperative periprosthetic joint infection (PJI) following total hip arthroplasty (THA) and total knee arthroplasty (TKA) remains challenging. The purpose of our study was to determine the impact of antibiotics given prior to laboratory evaluation on the reliability of serologic and synovial fluid tests to identify PJI in the early postoperative period.

Methods: We identified 49,861 primary total hip arthroplasties and total knee arthroplasties performed between 2000 and 2019.

Outcomes of Intramedullary Nail Fixation for Metastatic Disease: Impending and Pathologic Fractures.

Background/aim: Intramedullary nail (IMN) fixation has become a treatment mean for impending and pathologic femur fractures. Currently there continues to be a lack of data examining functional outcomes, complications, and survivorship of patients treated with IMNs for metastatic disease of the femur.

Patients And Methods: We retrospectively identified 183 IMNs placed for impending (n=145) or pathologic (n=38) metastatic fractures from 2010 to 2018.

Laboratory Value Effectiveness in Predicting Early Postoperative Periprosthetic Joint Infection After Total Hip Arthroplasty.

Background: Diagnosing early periprosthetic joint infection (PJI) after primary total hip arthroplasty (THA) remains challenging. We sought to validate optimal laboratory value cutoffs for detecting early PJIs in a series of primary THAs from one institution.

Methods: We retrospectively identified 22,795 primary THAs performed between 2000 and 2019.

The effectiveness of laboratory tests to predict early postoperative periprosthetic infection after total knee arthroplasty.

Aims: It remains difficult to diagnose early postoperative periprosthetic joint infection (PJI) following total knee arthroplasty (TKA). We aimed to validate the optimal cutoff values of ESR, CRP, and synovial fluid analysis for detecting early postoperative PJI in a large series of primary TKAs.

Methods: We retrospectively identified 27,066 primary TKAs performed between 2000 and 2019.

Prevalence of postamputation pain and its subtypes: a meta-analysis with meta-regression.

Introduction: The inconsistent use of standardized approaches for classifying postamputation pain (PAP) has been a barrier to establishing its prevalence.

Objectives: The primary objective of this systematic review and meta-analysis is to determine the prevalence of nontraumatic lower-extremity PAP using an established taxonomy. The secondary objective is to determine the prevalence of PAP subtypes, including phantom limb pain and residual limb pain (RLP).

Low-Dose vs Regular-Dose Aspirin for Venous Thromboembolism Prophylaxis in Primary Total Joint Arthroplasty.

Background: Consensus on whether low-dose (81 mg) or regular-dose (325 mg) aspirin (ASA) is more effective for venous thromboembolism (VTE) chemoprophylaxis in primary total joint arthroplasties (TJAs) is not reached. The goal of this study is to evaluate the efficacy of low-dose and regular-dose ASA for VTE chemoprophylaxis in primary total hip arthroplasties and total knee arthroplasties.

Methods: We retrospectively identified 3512 primary TJAs (2344 total hip arthroplasties and 1168 total knee arthroplasties) with ASA used as VTE chemoprophylaxis between 2000 and 2019.

A 16-Year-Old Male with Thoracic Compression following Posterior Spinal Instrumentation and Fusion for Marfan-Associated Syndromic Scoliosis.

Introduction: Marfan syndrome is an autosomal dominant disorder caused by a mutation in the gene which affects connective tissue. The features of Marfan syndrome include many musculoskeletal abnormalities which require orthopaedic surgical intervention. Given the expansive phenotypic variations and comorbidities associated with Marfan syndrome, knowledge of perioperative risk factors and potential complications is essential.

Initiation of Postpartum Contraception by 90 Days at a Midwest Academic Center.

Introduction: Contraception is a critical component of addressing the health needs of women in the postpartum period. We assessed contraception initiation by 90 days postpartum at a large, academic medical center in the Midwest.

Methods: In this retrospective cohort study, 299 charts were randomly sampled and 231 were analyzed from deliveries between May 1 to July 5, 2018.

Treatment of type III supracondylar humerus fractures: adherence and limitations of American Academy of Orthopedic Surgeons Appropriate Use Criteria App.

The American Academy of Orthopedic Surgeons (AAOS) published Appropriate Use Criteria (AUC) in 2014 to aid physicians in the management of pediatric supracondylar humerus fractures. AUC should be evaluated in real practice, and if necessary modified based on identified problems. This study compares AAOS AUC recommendations with actual treatment performed in a cohort of patients treated for type III supracondylar humerus fractures.

Patterns of Pain in Adolescents with Slipped Capital Femoral Epiphysis.

Objective: To prospectively characterize pain locations in slipped capital femoral epiphysis (SCFE) and evaluate pain locations as predictors of a delay in diagnosis.

Study Design: This was an institutional review board approved prospective study of 110 children who underwent surgery for SCFE at a tertiary children's hospital between 2009 and 2015. Standardized pain diagrams were completed by 107 children.

Do Heavier Patients With Adolescent Idiopathic Scoliosis Have More Preserved Thoracic Kyphosis and Pulmonary Function?

Study Design: Retrospective.

Objectives: We aimed to determine if heavier patients with adolescent idiopathic scoliosis (AIS) had more preserved thoracic kyphosis (TK), and as a result, more preserved pulmonary function.

Summary Of Background Data: Some believe that childhood weight is predictive of adult sagittal plane parameters, with heavier children having greater TK as adults.