Comparison of Existing and New Total Knee Arthroplasty Implant Systems From the Same Manufacturer: A Prospective, Multicenter Study.

Introduction: This study evaluated total knee arthroplasty (TKA) outcomes for an Existing-TKA versus New-TKA from the same manufacturer.

Methods: TKA outcomes for 752 with Existing-TKA versus 1129 subjects with New-TKA were followed through 2 years using patient-reported outcome measures (PROMs). Responders were assessed per Outcome Measures in Rheumatology-Osteoarthritis Research Society International criteria.

Revision total knee arthroplasty versus primary total knee arthroplasty: a matched cohort study.

Introduction: The primary aim of this study was to describe a baseline comparison of early knee-specific functional outcomes following revision total knee arthroplasty (TKA) using metaphyseal sleeves with a matched cohort of patients undergoing primary TKA. The secondary aim was to compare incidence of complications and length of stay (LOS) between the two groups.

Methods: Patients undergoing revision TKA for all diagnoses between 2009 and 2016 had patient-reported outcome measures (PROMs) collected prospectively.

Excellent Survival and Good Outcomes at 15 Years Using the Press-Fit Condylar Sigma Total Knee Arthroplasty.

Background: We report 15-year survival, clinical, and radiographic follow-up data for the Press-Fit Condylar Sigma total knee arthroplasty.

Methods: Between October 1998 and October 1999, 235 consecutive TKAs were performed in 203 patients. Patients were reviewed at a specialist nurse-led clinic before surgery and at 5, 8-10, and 15 years postoperatively.

Body mass index, hip function and surgeon volume are independent predictors of dislocation: an analysis of 4334 total hip replacements.

The aim of this study was to identify pre-operative and intra-operative factors that are predictive of dislocation following primary total hip replacement (THR). Data were prospectively collected for a consecutive series of 4334 THRs undertaken over a 14-year period. Ninety-eight (2.

Range of movement correlates with the Oxford knee score after total knee replacement: A prediction model and validation.

Background: Patient reported outcome measures are widely used in the evaluation of outcomes after Total Knee Replacement (TKR) in joint registries and large studies. The aim of this study was to assess the relationship between the Oxford knee score (OKS) and range of motion (ROM) after TKR, and to construct and validate prediction models of ROM from the measured OKS.

Methods: Eight hundred sixty patients reviewed five years postoperatively and 273 patients reviewed nine to 10 years postoperatively completed an OKS.

Metaphyseal Sleeves for Revision Total Knee Arthroplasty: Good Short-Term Outcomes.

Metaphyseal sleeve prostheses have shown promising results in the management of bone defects at revision TKA. We present a study of their use in aseptic revision TKA. Thirty-five revisions were included in 34 patients with wear or aseptic loosening indicated in 71% of cases.

Predictors of excellent early outcome after total hip arthroplasty.

Background: Not all patients gain the same degree of improvement from total hip replacement and the reasons for this are not clear. Many investigators have assessed predictors of general outcome after hip surgery. This study is unique in its quest for the predictors of the best possible early outcome.

Outlier analysis in orthopaedics: use of CUSUM: the Scottish Arthroplasty Project: shouldering the burden of improvement.

National joint registries have become well established across the world. Most registries track implant survival so that poorly performing implants can be removed from the market. The Scottish Arthroplasty Project was established in 1999 with the aim of encouraging continual improvement in the quality of care provided to joint replacement patients in Scotland.

Abnormal human chondrocyte morphology is related to increased levels of cell-associated IL-1β and disruption to pericellular collagen type VI.

Early osteoarthritis (OA) is poorly understood, but abnormal chondrocyte morphology might be important. We studied IL-1β and pericellular collagen type VI in morphologically normal and abnormal chondrocytes. In situ chondrocytes within explants from nondegenerate (grade 0/1) areas of human tibial plateaus (n = 21) were fluorescently labeled and visualized [2-photon laser scanning microscopy (2PLSM)].

Incidence of knee arthroscopy in patients over 60 years of age in Scotland.

Arthroscopy has been utilised in the management of knee osteoarthritis for over 70 years but in recent years there has been growing debate about the efficacy of such treatment. We reviewed data from a national register, the Scottish Arthroplasty Project. We analysed 8897 knee arthroscopies performed in patients aged over 60 in Scotland between 1997 and 2006.

The complication rate and medium-term functional outcome after total hip replacement in smokers.

We aimed to study the effect of smoking on the complication rate and medium-term functional outcome after total hip replacement. 1767 patients undergoing a cemented THR in one hospital were followed up prospectively at 6, 18, 36, and 60 months. Harris Hip Scores, SF-36 scores and complications were recorded.

Economic evaluation of dabigatran etexilate for the prevention of venous thromboembolism after total knee and hip replacement surgery.

Objective: This was an evaluation of the cost-effectiveness of oral dabigatran etexilate compared with subcutaneous low-molecular-weight heparin (enoxaparin) for the prevention of venous thromboembolism (VTE) after total knee replacement (TKR) and total hip replacement (THR) surgery from the perspective of the UK National Health Service.

Methods: Dabigatran etexilate (220 mg once daily) was compared with enoxaparin (40 mg once daily) in patients undergoing TKR (duration of prophylaxis, 6-10 days) and THR (duration of prophylaxis, 28-35 days). The 10-week acute postsurgical phase was modeled using a decision tree.

Infection after knee arthroplasty a prospective study of 1509 cases.

We report a prospective study of 1509 consecutive total knee arthroplasties looking at risk factors for infection in modern surgical practice. The overall deep infection rate was 1%. A further 51 patients had a superficial infection (3.

Predicting pain after total knee arthroplasty.

Six hundred twenty-two primary total knee arthroplasties were studied prospectively in 512 patients. A group with no pain and one with severe pain at 5 years were statistically compared. The following were significant predictors of poor pain outcomes: age below 60 (17%) compared with above 60 (7%, P < .

Five-year results of the Sigma total knee arthroplasty.

The DePuy Sigma total knee arthroplasty (TKA) was introduced in 1997 as a modification of the Press Fit Condylar Knee (PFC) TKA and has been used extensively in the United Kingdom and worldwide. It is the most commonly used TKA in England and Wales, where it accounts for 36% of all primary TKA. The PFC was well established, with reported 10-year survival rates of 93-97%, but this study reports the first 5-year clinical and radiographic follow-up data for the Sigma TKA.

Unicompartmental or total knee arthroplasty?: Results from a matched study.

There are few direct comparative studies evaluating results after unicompartmental knee arthroplasty and total knee arthroplasty. We determined the active range of motion, Knee Society score, and 5-year survivorship rate after 54 consecutive unilateral unicompartmental knee arthroplasties compared with a matched group of 54 unilateral total knee arthroplasties. The two groups of patients were matched for age, gender, body mass index, preoperative active range of movement, and preoperative Knee Society scores.

Clinical and radiologic outcome of total hip arthroplasty performed by trainee compared with consultant orthopedic surgeons.

Data were prospectively collected on 139 total hip arthroplasties (THAs) performed by supervised specialist registrars (residents) and 397 THAs performed by consultants. The Harris Hip Score and data on comorbidity, blood loss, transfusion requirements, re-operation, dislocation, and death were recorded. Radiologic assessment of acetabular and femoral component alignment and cementation was made using 114 trainee radiographs that were available for review at 6 months.