View clinical trials related to Implants.
Filter by:Aim of the study is to examine the feasibility of dental implant insertion in patients receiving high, adjuvant and low dose > 4 years.
The purpose of this study is to evaluate the diagnostic performance of a new ABUS system among 4 different population: Population A: women undergoing screening for familial or genetic predisposition for breast cancer. Population B: women with newly diagnosed breast cancer. ABUS performance will be compared to breast MRI in the pre-operative assessment of breast cancer extent. Population C: women with BI-RADS 3 or 4 lesions in a routine breast imaging examination. ABUS will be evaluate as a problem-solving tool. Population D: women undergoing breast MRI for the assessment of breast implants integrity. ABUS performance will be compared to breast MRI.
The investigators aim to determine the cause of failure of orthopaedic implants using multi-disciplinary analysis of data from patients who have undergone revision.
Metal-on-metal total hip replacement (MoM THR) has been targeted at younger patients with anticipated long-term survival since the bearing surfaces wear less than the traditional metal-on-plastic (MoP) replacements. However, the production of metal ions as a result of the wear is a concern because of the possible toxicity to cells. In Norwich England a number of different metal-on-metal implants have been trialed of which one, the Ultima TPS, has had very poor results. A total of 545 patients have had 652 MoM THRs with the Ultima TPS of whom more than 20% have now been revised. There is an ongoing MHRA program to screen for problems using MRI scans with a technique developed in Norwich. Investigations so far show massive corrosion in the implants with a catastrophic immune response causing death of cells. This may include death of bone leading to fracture. In a third of patients revised there has been pain but normal plain X-rays. In some patients without pain who have been screened there are abnormal changes on an MRI scan. We wish to investigate the immune cells in patients to find out why this has happened. The study will include patients coming for a new hip to act as a comparator, as well as those with a MoM THR and patients being revised with MoM THRs, and MoP THRs. We shall also investigate patients with other MoM THRs opportunistically.