Fifteen-year survival analysis of an oxidised zirconium total knee arthroplasty.

Background: Early studies have found Oxidised Zirconium (OxZr-Nb) total knee arthroplasties to have a low incidence of failure in young, high demand patients. Theoretically this is because they are low friction and hard wearing. However, there are a paucity of studies reporting on the outcome of these implants beyond ten years.

Short-Term functional comparison of three total knee arthroplasties-Journey II, Genesis II and Profix.

Aim Of The Study: To compare the outcomes of three knee arthroplasty design philosophies and surface tribology.• A zirconium-surfaced, bicruciate-stabilised implant designed to mimic kinematic movement and improve flexion and outcomes;• A cobalt-chrome surfaced, multi-radius design with built-in femoral external rotation to aid balancing and patella tracking through a deeper trochlea groove;• A zirconium-surfaced, single-radius implant designed on surface conformity, particularly within the patello-femoral joint.

Methods: 313 knee replacements - 103 103 and 107 - were statistically assessed at a minimum of 2 years using WOMAC, Oxford and SF-12 scores, and range of movement.

Validity of the International Prostate Symptoms Score in predicting urinary retention after joint replacement.

Postoperative urinary retention necessitating catheterization after major lower limb arthroplasty surgery adds to the patients' postoperative discomfort and increases the risk of urinary tract infection with potential risk of transient bacteraemia and seeding of infection to prosthetic joints. Preoperative evaluation of patients with lower urinary tract symptoms may help to identify at-risk patients and the International Prostate Symptoms Score (IPSS) has been used as a screening tool to quantify the severity of symptoms in males. A prospective cohort of 303 patients undergoing total hip or knee arthroplasty was evaluated using the IPSS.

Manipulation under anaesthetic following total knee arthroplasty: Predicting stiffness and outcome.

Purpose: A stiff total knee replacement can severely limit a patient's post-operative function, but there remain few prospective trials identifying those patients at risk, nor the efficacy of manipulation. We analysed our prospectively collected database to assess predictors of stiffness and outcomes following manipulation.

Methods: Using prospectively collected knee arthroplasty data, including preoperative and post-operative range of knee movement, SF-12 (physical and mental) and The Western Ontario and McMaster Universities Arthritis Index (WOMAC) scores, patients requiring manipulation were compared to a matched group of patients not requiring manipulation, with a detailed statistical analysis undertaken to assess potential risk factors and the post-manipulation outcome.