Active clinical trials for "Osteoarthritis, Hip"

This study aims to objectively evaluate the implications of physiotherapeutic rehabilitation in the Assistance Protocol of Total Hip Arthroplasty (THA), by assessing the motor performance and testing the quality of life of patients undergoing THA surgery, to improve rehabilitation strategies for this population.

This study was initiated to investigate the impact of the computer based image free navigation on the precision of the cup implantation. The implantation of the acetabular component (cup) is known to be a critical step in hip endoprosthetics. The cup position influences significantly the function, the absence of pain and the longevity of the artificial hip joint. The image free navigation system OrthoPilot is used to control the positioning of the cup during surgery.

The purpose of this study is to establish whether or not there is a clinical advantage to the use of Aquamantys® System from Medtronic Advanced Energy (formerly Salient Surgical Technologies) in patients undergoing primary total hip arthroplasty via the anterior supine intermuscular surgical approach in terms of blood loss, transfusion and wound healing. Wound healing will be assessed by a blinded observer and based upon a simple and subjective criteria: a) as expected, b) better than expected or c) worse than expected. The blinded observer is experienced in the care of the surgical patient and wound evaluation.

Background Recently published studies confirm that preheating of femoral component enhances shear strength of implant-cement interface. Both Iesaka et al 2003 and Jafri et al 2004 showed reduction in cement porosity on cement-implant interface with preheated femur components. We will use the radiostereometry analysis (RSA) to investigate how the preheating of femur component influence on prosthesis survivorship. There are no clinical controlled studies performed to the date. The aim of the study Comparison of the migration rates between preheated and non-preheated femur components, analyzed with RSA. Methods Randomization of 80 patients into 2 groups with 40 in each. All patients will undergo standard hybrid total hip replacement. In group one the femur component (Bi-Metric, Interlock Biomet) will be preheated to 40 degrees of Celsius before cementation. In group two: the control group, the femur component will be of room temperature. We will measure the temperature at cement bone interface during the operation with use of thermocouple electrodes inserted through separate drill hole in the femur. The measurements will be recorded every 10 seconds. The patients will follow the standard postoperative rehabilitation program. The RSA analysis will be performed the first day after the operation and at 3, 12, 24 months postoperatively. The Dual-energy X-ray absorptiometry scanning (DEXA) of the femur will be performed at the first week after the operation and at 12 and 24 months postoperatively. The patients will be followed both clinically and radiologically at 1 and 2 years after the operation (Harris Hip Score). The results will be expressed as mean + SD (in mm). ANOVA statistical analysis will be used to confirm the differences between the groups.

Methods to reduce the revision rate of total hip arthroplasties (THAs) because of wear-related issues are important to examine, particularly because younger patients have a disproportionately high risk of revision. The investigators hoped to follow up patients and see if long-term Harris hip scores and WOMAC scores better in younger patients with a ceramic-on-ceramic (COC) THA compared with those with a ceramic-on-highly-cross-linked polyethylene (COP) THA.

Patients will be randomised to either operation with a Corail stem or a SP-CL stem. The groups are examined with RSA, conventional x-rays, PROM-data and DXA. First evaluation will be done at two years.

The purpose of this study is to determine if there is a difference in stress shielding and bone resorption of the proximal femur in two anatomical stem total hip designs.

The purpose of this research is to determine if post-operative cognition will be better if the general anesthesia for surgery is done with an inhaled (gas through a breathing tube) or intravenous (medicine injected in the IV) general anesthetic technique.

Goal of the research To check the viability of "Operating Table Position Simulating Radiographs", while positioned on the contralateral side. To determine whether knowledge about the angles displayed on this radiograph (pelvic tilt) influences the accurate positioning of the acetabular cup during the Total Hip Replacement procedure.

The purpose of this study is to compare the articular surface replacement (ASR) prosthesis placed by the conventional positioning method and the ASR prosthesis placed by 'computer assisted surgery' (CAS) in variation between pre planned position of the femoral component and the actual position of the femoral component of the prosthesis. The hypothesis is that this variation is larger with the conventional positioning method than when CAS is used.