Total knee arthroplasty (TKA) is one of the most common orthopaedic procedures performed, and is projected to exponentially increase over the next 20 years. As primary TKA cases increase, so does the frequency of revisions. The primary goals for all TKA cases include alleviating pain and improving overall knee function. The objective of this study was to evaluate the change in outcomes as measured by the Knee Society Score (KSS) between primary and revision TKA systems. This data was collected as part of three prospective, post-market, multicenter studies comparing preoperative to 6-week data. Patients were stratified into two groups based on type of single radius knee device; Posteriorly Stabilized (PS) group and Total Stabilizer (TS) group. Early clinical outcomes based on the KSS and operative data were used to compare groups.1) INTRODUCTION
2) METHODS
Revision total knee arthroplasty (TKA) can be very complex in nature with difficulties/obstacles involving bone and soft tissue deficits, visualization and exposure, as well as alignment and fixation. Auxiliary devices such as augmentation and offset adapters help address these issues; however they increase the complexity of the reconstruction. The objective of this study was to show that use of a single radius revision TKA system allowing for minimal auxiliary revision devices can yield positive early clinical outcomes. This data was collected as part of a prospective, post-market, multicenter study. One hundred and twenty-five single radius revision TKA cases were evaluated. Surgical details were reviewed and cases were grouped based on type of auxiliary devices used. Group 1 included cases that used only femoral and/or tibial augments. Group 2 used femoral and/or tibial augments in conjunction with femoral and/or tibial offset adapters. Early clinical outcomes, operative data and radiographic findings were used to compare cases.Introduction:
Methods:
Deep infection is a potentially catastrophic complication of joint replacement surgery. Early intervention in suspected prosthetic joint infection in the form of aggressive Debridement and targeted Antibiotics can lead to successful Implant Retention (DAIR). In our centre, we adopt an aggressive approach to suspected prosthetic joint infection, working in a multi-disciplinary team with microbiologists and an infection surveillance team to identify and treat suspected infected cases at the earliest opportunity. To evaluate the efficacy of the treatment of prosthetic joint infection with DAIR.INTRODUCTION
OBJECTIVES
To compare a variety of commercially available bone graft substitutes (BGS) in terms of promoting adherence, proliferation and differentiation of osteoprogenitor cells. A fixed number of porcine mononuclear cells obtained from cancellous bone of the proximal femur was mixed with a standard volume of BGS and then cultured for one week in media followed by two weeks in osteogenic media. BGS included commercially available β-Tricalcium Phosphate (□-TCP), highly porous β-TCP, Hydroxyapatite/Tricalcium phosphate composite, calcium sulphate (CS), Hydroxyapatite (HA), Demineralised bone matrix (DBM), polygraft, and polymers (PGA, PLGA). Staining for live/dead cells as well as scanning electron microscopy (SEM) were carried out on all samples to determine viability and cellular binding. Further outcome measures included alkaline phosphatase assays with normalisation for DNA content to quantify osteogenic potential. Negative (BGS without cells) and positive (culture expanded osteoprogenitors) control experiments were carried out in parallel to validate the results.Aim
Materials and methods
Available AP weight bearing radiographs of the knee taken at 8 months and 5 years postoperatively were examined in a random order twice by each of two surgeons who were blinded to the patient details and length of follow up. The severity of arthritis was graded using the classifications of Ahlback and Altman, giving a measure of arthritis progression.
