View clinical trials related to Hip Replacement Arthroplasty.
Filter by:The purpose of the Trident® II project is to introduce a cup system that modernizes and streamlines Stryker's acetabular shell portfolio. The Trident® II Clusterhole HA Shell combines the history of Stryker's Trident® shells with plasma spray CpTi with HA coating. Plasma spray coating and HA is considered to be the gold standard in orthopaedics today. This coating will help the cup to achieve early stability and long term fixation. One of the causes for implant failure is loosening and osteolysis. Osteolysis can be triggered when metal or polyethylene wear particles from the implant or bearing surfaces migrate between implant and surrounding host bone tissue. With the development of sequential irradiated and annealed highly crosslinked polyethylene (X3) wear rates (mean proximal, 2-dimensional and 3-dimensional) have been substantially reduced to 0.001 mm/y, calculated between 1 year and 5 years. The Trident® II Clusterhole HA shells have a plasma sprayed CpTi coating compared to the arc-deposition CpTi coating on legacy Trident® shells, both designed to allow bone ongrowth. With this study the investigators want to prove equivalent implant fixation of both type of cups. The primary objective is the assessment of prosthetic fixation and migration results after two years of the Trident® II Clusterhole HA shell compared to the legacy Trident® Hemi HA shell by means of RSA. It is hypothesized that they will perform equally. The secondary outcome measure will be long-term (10-year) survival based on the two-year migration patterns combined with clinical factors and radiographic aspects. In order to identify other clinical parameters besides the fixation of the prosthesis components, clinical scores and radiographic aspects will be correlated with the RSA outcome. The 10-year results will be used to verify the predicted long-term survival results.
The purpose of this study is to evaluate radiological performance of the cementless femoral stem AMIStem H at 1 and 5-year follow-up. All the patients operated at the investigational sites between April 2009 and April 2012 will be reviewed at 1, 5 and 10 year according to standard practice
Primary objectives: 1. To measure serum metal ion levels (blood Chromium (Cr) and Cobalt (Co) ion concentration) in patients that received the Ceramic on Metal arthroplasty of hip and who have well functioning primary total hip arthroplasties during short and medium- term follow up time points. 2. To compare blood ion levels of patient that received COM arthroplasty with the blood ion levels of patient receiving non-COM standard total hip arthroplasty (a Metal on polyethylene or ceramic on polyethylene total hip arthroplasty) at short- term and medium-term follow up time points . Secondary Objective: 1) To determine whether these blood levels correlate with any device specific factors such as: component position, size and type, wear rate and/or patient specific factors such as gender, body mass index, age and activity level.
Stimulating catheters have been introduced to reduce the incidence of secondary failure after continuous peripheral nerve blocks, but they effectiveness over traditional nonstimulating catheters is still controversial. The aim of this prospective, randomized, blinded study is to detect if stimulating catheters improve postoperative compared with conventional non-stimulating catheters.
The goal of the study is the analysis of metal ion serum concentrations and of the cytokine production in the blood of patients with a conventional cementless total hip replacement. The rationale is that a) the bearing wear releases particles respectively metal ions into the joint and the blood which will differ in quantity and composition; b) the cytokine production of peripheral blood mononuclear cells (PBMC) might be influenced to a varying degree by the metal and the ceramic particles. The patients from whom the respective samples will be analyzed are randomized in one of the following three groups: metal-on-metal, ceramic-on-ceramic or ceramic-on-metal. A 36mm bearing is used in all patients. In this separate study, follow-up data of the clinical and radiographic examinations of the patients are available.
Currently the most use solution to volemic reposition in hip replacement arthroplasty is the crystalloid solution. This trial intends to compare two different volemic replacements: HES and Ringer's lactate. This research has been analyzing hemodynamic parameters and the coagulation status before and after the pre-expansion with the solutions above mentioned.