Introduction of ROSA robotic-arm system for total knee arthroplasty is associated with a minimal learning curve for operative time.

Purpose: The introduction of robotics for total knee arthroplasty (TKA) into the operating theatre is often associated with a learning curve and is potentially associated with additional complications. The purpose of this study was to determine the learning curve of robotic-assisted (RA) TKA within a multi-surgeon team.

Methods: This prospective cohort study included 83 consecutive conventional jig-based TKAs compared with 53 RA TKAs using the Robotic Surgical Assistant (ROSA) system (Zimmer Biomet, Warsaw, Indiana, USA) for knee osteoarthritis performed by three high-volume (> 100 TKA per year) orthopaedic surgeons.

Getting it right first time (GIRFT): A closed loop study of hip arthroplasty documentation in a trauma and orthopaedic department.

Introduction: The objectives of this study conducted in the University Hospital of North Tees, UK were to: (i) Identify if the current hip arthroplasty documentation met good compliance with the Getting It Right First Time (GIRFT) hip arthroplasty guidance (ii) Improve current documentation with a transition from hand-written notes to an online typed personalised operative hip arthroplasty template (iii) Improve the quality of documentation and adherence to GIRFT guidance in hip arthroplasty.

Methods: We led a team of 7 doctors to review University Hospital of North Tees compliance against 24 criteria laid out by GIRFT. After examining 20 operative records retrospectively at random from a spread of orthopaedic consultants in the department, it was shown that there was poor compliance against GIRFT guidelines.

Early to medium term outcomes of osteochondral lesions of the talus treated by autologous matrix induced chondrogenesis (AMIC).

Background: The primary aim of the study is to evaluate the functional outcome following AMIC procedure in patients with osteochondral injury of the talus. The secondary aim is to evaluate if size of the lesion and patient's age influence outcome.

Materials And Methods: This is a retrospective study of 25 patients who underwent AMIC procedure of the talus treated by a single surgeon.

Aseptic lymphocyte-dominated vasculitis-associated lesions are related to changes in metal ion handling in the joint capsules of metal-on-metal hip arthroplasties.

Objectives: We have encountered patients who developed large joint fluid collections with massive elevations in chromium (Cr) and cobalt (Co) concentrations following metal-on-metal (MoM) hip arthroplasties. In some cases, retrieval analysis determined that these ion concentrations could not be explained simply by the wear rates of the components. We hypothesized that these effects may be associated with aseptic lymphocyte-dominated vasculitis-associated lesion (ALVAL).

A comparative surface topographical analysis of explanted total knee replacement prostheses: Oxidised zirconium vs cobalt chromium femoral components.

It has been proposed that an increased surface roughness of the femoral components of Total Knee Replacements (TKRs) may be a contributing factor to the accelerated wear of the polyethylene (PE) bearing and ultimately prosthesis failure. Oxidised Zirconium was introduced to the orthopaedic market in an attempt to reduce PE wear associated failures and increase the longevity of the prosthesis. In this study, non-contacting profilometry was used to measure the surface roughness of the femoral components of 6 retrieved TKRs (3 Oxidised Zirconium (OxZr) and 3 Cobalt Chromium alloy (CoCr) femoral components) and 2 as-manufactured femoral components (1 OxZr and 1 CoCr).