Biomechanical Evaluation of the Effect of Varying Humeral Implant Length in Total Elbow Replacement: A Finite Element Analysis.

Background: Total elbow arthroplasty (TEA) is increasingly used for expanding indications but complications like aseptic loosening and periprosthetic fractures persist. Our objective is to examine the biomechanical behavior of the total elbow implant in response to varying implant lengths by investigating the stresses and the stress shielding effect in the bone-implant assembly using finite element (FE) modelling.

Methods: A fourth-generation synthetic humerus sawbone and its corresponding digital model were used in this study.

Quantifying the Positional Deviation Between the True Flexion-Extension and Epicondylar Axes of the Elbow: A 3D Computational Study.

Background and objective The epicondyles are commonly used surgical reference landmarks for elbow arthroplasty and external fixator application. This study aimed to investigate whether the epicondylar axis differed from the elbow's true flexion-extension (F-E) axis in terms of both rotational difference and translational offset. Methods Three-dimensional (3D) models of 15 cadaver elbows were created.

A Review of Authorship Inflation and Multicenter Collaboration Trends in Orthopedic, Medical, and Surgical Journals Over the Last 60 Years.

Over the past six decades, authorship numbers in academic publications have increased significantly, a phenomenon known as authorship inflation. This study aims to analyze comparative authorship trends and the influence of multicenter collaborations across major orthopedic, medical, and surgical journals. We reviewed metadata from (NEJM), (AS), and (JBJS) from January 1, 1960, to December 31, 2019.

Predictors of 10-year Mortality After Hip Fracture Surgery in a Pre-Pandemic Cohort.

Introduction: Though hip fractures are associated with significant mortality and morbidity, increasing life expectancy in developed countries necessitates an analysis of mortality trends and factors predicting long term survival. The aim of this study is to identify the predictors of 10-year mortality as well as assess the correlation of Age-adjusted Charlson comorbidity index (ACCI) with 10-year mortality in a surgically treated Asian geriatric hip fracture population.

Materials And Methods: From January 1, 2007 to December 31, 2009, 766 patients who underwent surgery for hip fracture with a minimum follow up of 10-years were recruited to the study (92% follow-up rate).

Systems modelling as an approach for eliciting the mechanisms for hip fracture recovery among older adults in a participatory stakeholder engagement setting.

Introduction: Due to an aging population, the rising prevalence and incidence of hip fractures and the associated health and economic burden present a challenge to healthcare systems worldwide. Studies have shown that a complex interplay of physiological, psychological, and social factors often affects the recovery trajectories of older adults with hip fractures, often complicating the recovery process.

Methods: This research aims to actively engage stakeholders (including doctors, physiotherapists, hip fracture patients, and caregivers) using the systems modeling methodology of Group Model Building (GMB) to elicit the factors that promote or inhibit hip fracture recovery, incorporating a feedback perspective to inform system-wide interventions.

A year of COVID-19: effects of a global pandemic on a hip fracture bundled care protocol.

Introduction: Our aim was to analyse how the coronavirus disease 2019 (COVID-19) pandemic affects a hip fracture bundled care protocol. We hypothesised that key performance indicators, but not short-term outcomes, may be adversely affected.

Methods: Patients admitted under a hip fracture bundled care protocol were divided into two arms: 'COVID' group included patients admitted in 2020 during the COVID-19 pandemic and 'PRE-COVID' group included patients admitted in 2019.

Incomplete Periprosthetic Atypical Femoral Fracture With Concomitant Hip and Knee Arthroplasties: A Case Report.

Case: We present a case of an incomplete periprosthetic femoral fracture at the mid-distal third of the femoral stem after 11 months of bisphosphonate use. It is 1 of 4 cases of mid-distal periprosthetic atypical femoral fractures (PAFFs) found in our literature review. She was treated with protected weight-bearing, cessation of bisphosphonates, and teriparatide.

Preoperative Oswestry Disability Index Cannot Reliably Predict Patient Satisfaction After Single and Double Level Lumbar Transforaminal Interbody Fusion Surgery.

Introduction: The role of patient-reported outcomes in preoperative assessment is not well studied. There is recent interest in studying whether Patient-reported outcomes scores can be used either independently, or in conjunction with clinical findings, in the assessment of patients for surgery.

Aims: To investigate if improvement in clinically significant scores correlate with post-operative patient satisfaction in 1-2 level transforaminal lumbar interbody fusion (TLIF) surgery.

Reduction of geometric misfit in straight antegrade humeral nailing by evaluating the effect of entry point angulation using a three-dimensional computational analysis.

Background: Straight antegrade intramedullary nails are generally inserted utilising the apex as the surgical entry point in accordance with the mechanical axis of the bone. Our objective is to optimise the bone-nail fit in intramedullary nailing by subjecting the surgical entry point to varying angulations in both the mediolateral and anterior-posterior directions via a quantitative fit assessment in each configuration to identify the optimal angulation, defined as the angulation with the lowest occurrence of thin-out to improve nail fitting within the humerus.

Methods: Computed tomography (CT) scans from 10 cadaveric humeri models were used to generate three-dimensional bone models.

Factors affecting healing and progression of conservatively treated incomplete atypical femoral fractures: retrospective observational study.

Introduction: Incomplete atypical femoral fractures (iAFF) may occur with prolonged bisphosphonate usage. Factors influencing iAFF healing and progression are not well understood. This study of conservatively managed iAFF assessed factors influencing iAFF healing and progression including the effects of bisphosphonates and teriparatide use.

Lower socioeconomic status is associated with increased co-morbidity burden and independently associated with time to surgery, length of hospitalisation, and readmission rates of hip fracture patients.

Unlabelled: This study examines the relationship between socioeconomic status, comorbidities, and clinical outcomes of hip fracture patients. Lower socioeconomic status is not only associated with poorer comorbidities but is also independently impacting surgical access and outcomes. This can be considered a "double setback" in the management of hip fractures.

Effect of implant length variations on stress shielding in proximal humeral replacement after tumor excision under torsion: Finite element study.

The proximal humerus is the most common site of occurrence of primary bone tumors in the upper limb. Endoprosthetic replacement is deemed as the preferred reconstructive option following primary resection of bone tumors. However, it has been also associated with complications such as stress shielding and aseptic loosening compromising prosthetic survival.

Whole Exome Sequencing in Two Southeast Asian Families With Atypical Femur Fractures.

Atypical femur fractures (AFFs) are rare complications of anti-resorptive therapy. Devastating to the affected individual, they pose a public health concern because of reduced uptake of an effective treatment for osteoporosis due to patient concern. The risk of AFF is increased sixfold to sevenfold in patients of Asian ethnicity compared with Europeans.

End stage renal disease patients undergoing hip fracture surgery have increased length of stay, acute hospital bill size, and reduced survivorship-implications on a bundled care program.

Unlabelled: End stage renal disease (ESRD) is an independent risk factor for the development of hip fractures and is associated with a higher mortality and complication rates. As these patients significantly skew healthcare financing in a bundled care payment (BCP) program, a risk stratified approach to BCPs could be done to take into account the difference in resources required.

Introduction: End stage renal disease (ESRD) is an independent risk factor for the development of hip fractures and is associated with a higher mortality and complication rate.

Developing a Simpler Prognosticating Tool: Comparing the Combined Assessment of Risk Encountered in Surgery Score with Deyo-Charlson Comorbidity Index and The American Society of Anesthesiologists Physical Status Score in Predicting 2 years Mortality after Hip Fracture Surgery.

The use of risk stratification tools in identifying high-risk hip fracture patients plays an important role during treatment. The aim of this study was to compare our locally derived Combined Assessment of Risk Encountered in Surgery (CARES) score with the the American Society of Anesthesiologists physical status (ASA-PS) score and the Deyo-Charlson Comorbidity Index (D-CCI) in predicting 2-year mortality after hip fracture surgery. A retrospective study was conducted on surgically treated hip fracture patients in a large tertiary hospital from Jan 2013 through Dec 2015.

Higher Charlson Comorbidity Index Increases 90-Day Readmission Rate with Poorer Functional Outcomes in Surgically Treated Hip Fracture Patients.

Introduction: The associated mortality and morbidity in hip fracture patients pose a major healthcare burden for ageing populations worldwide. We aim to analyse how an individual's comorbidity profile based on age-adjusted Charlson Comorbidity Index (CCI) may impact on functional outcomes and 90-day readmission rates after hip fracture surgery.

Materials And Methods: Surgically treated hip fracture patients between 2013 and 2016 were followed up for 1-year and assessed using Parker Mobility Score (PMS), EuroQol-5D (EQ-5D) and Physical and Mental Component Scores (PCS and MCS, respectively) of Short Form-36 (SF-36).

Ultrasonic Percutaneous Tenotomy for Recalcitrant Lateral Elbow Tendinopathy: Clinical and Sonographic Results at 90 Months.

Background: In a study from our institution, ultrasonic percutaneous tenotomy of the brevis and the common extensor tendon for recalcitrant lateral elbow tendinopathy showed excellent safety profiles, high tolerability, efficiency, sustained pain relief, functional improvement, and sonographic evidence of tissue healing in 20 patients at 3 years' follow-up.

Purpose: To explore the long-term clinical and sonographic results of ultrasonic percutaneous tenotomy of the brevis and the common extensor tendon.

Study Design: Case series; Level of evidence, 4.

Early Postoperative Pain After Total Knee Arthroplasty Is Associated With Subsequent Poorer Functional Outcomes and Lower Satisfaction.

Background: There are few studies investigating the effects of acute postoperative pain on functional outcomes after total knee arthroplasty (TKA). The aims of this study are to identify perioperative factors associated with increased early postoperative pain and investigate the effects of acute postoperative day 1 and 2 pain on outcomes at 6 months and 2 years post-TKA.

Methods: 1041 unilateral TKA patients were included in this retrospective cohort study.

Studies of the criteria for determining optimal location of medial patellofemoral ligament attachment sites.

Identifying appropriate attachment sites is important in the planning of medial patellofemoral ligament (MPFL) reconstruction. Two criteria are advanced to describe normal MPFL function, namely isometric criterion and desired pattern criterion. Subsequently, computational methods have applied these criteria to determine optimal attachment sites.

Ensuring Business Continuity of Musculoskeletal Care During the COVID-19 Pandemic: Experience of a Tertiary Orthopaedic Surgery Department in Singapore.

On February 8, 2020, Singapore raised its Disease Outbreak Response System Condition (DORSCON) level to Orange, indicating that coronavirus 2019 (COVID-19) was a severe disease with high human transmissibility. Using lessons learned from the severe acute respiratory syndrome (SARS) outbreak in 2003, the orthopaedic surgery department at Singapore General Hospital, a tertiary-level referral center, was prepared to handle this pandemic through business-continuity planning. The business that we are referring to is the "business" of orthopaedic surgery, encompassing clinical care, education, research, and administration.

From "business continuity" to "back to business" for orthopaedic surgeons during the COVID-19 pandemic.

The coronavirus disease 2019 (COVID-19) pandemic has led to unprecedented challenges to healthcare systems worldwide. Orthopaedic departments have adopted business continuity models and guidelines for essential and non-essential surgeries to preserve hospital resources as well as protect patients and staff. These guidelines broadly encompass reduction of ambulatory care with a move towards telemedicine, redeployment of orthopaedic surgeons/residents to the frontline battle against COVID-19, continuation of education and research through web-based means, and cancellation of non-essential elective procedures.

Isolated Synovial Osteochondromatosis in a Completely Enclosed Suprapatellar Pouch: A Rare Case Report.

Introduction: A complete suprapatellar plica of the knee is a rare condition that separates the suprapatellar pouch from the rest of the knee cavity. Synovial osteochondromatosis is a rare benign monoarticular arthropathy affecting synovial joints that are clinically manifested as intra-articular multiple loose bodies. Isolated synovial osteochondromatosis within a concealed suprapatellar pouch caused by complete suprapatellar plica is an exceptionally rare occurrence.

Bipolar Hemiarthroplasty and Parathyroidectomy at the Same Setting for Fragility Fractures Secondary to Renal Bone Disease.

Background: From 1980s to the new millennium, the number of patients surviving with end stage renal disease (ESRD) has increased by 3 fold. This is driven by early detection of primordial and primary risk factors, state of the art renal replacement therapy and ease of public access to healthcare. Renal osteodystrophy (RO) is a metabolic bone disease causing significant morbidity in patients with ESRD, in particular fragility fractures.