Polyethylene Acetabular Component Insertion During Total Hip Arthroplasty by Dr. Chitranjan Ranawat
Submitted by: Your Practice Online
(OPENPRESS) February 6, 2008 -- Dr. Chitranjan Ranawat and his team members designed polyethylene acetabular component used in total hip arthroplasties with cemented expansion acetabular component for advanced osteonecrosis of the femoral head.
After the study on orthopaedic patients who have gone through total hip arthroplasty with polyethylene acetabular components insertion having less wear of 0.075 mm per year, says Dr. Ranawat. Study reports that the use of a cemented stem and cemented cup combination has more advantage than other insertions. The study group consisted of 80 males and 100 females, mean age 73.5 years (range: 62-85 years), and mean weight 155 lb (range: 104-230 lb). The mean follow-up was 8 years. Only 1 stem was revised in this series and 1 hip experienced dislocation. A patient questionnaire revealed significantly reduced pain, less use of a cane, and a lower incidence of limp vs uncemented total hip outcomes.
The Ranawat/Burstein® Total Hip System offers a wide variety of components to address the diverse needs of today's orthopedic surgeon. Porous cobalt chromium femoral stems, Interlok® cobalt chromium cemented femoral stems, porous and all-polyethylene acetabular components, and cobalt chromium and zirconia ceramic modular heads combine to provide optimum surgeon versatility. Ranawat/Burstein Total Hip System is a registered trademark of the Hospital for Special Surgery, New York, NY.
Biomet, as the manufacturer of this device, does not practice medicine and does not recommend this or any other surgical technique for use on a specific patient. The surgeon who performs only implant procedure is responsible for determining and utilizing the appropriate techniques for implanting the prosthesis in each individual patient.
Dr. Ranawat is fascinated of new highly cross-linked polyethylenes, but he needed to perform independent wear testing. His results demonstrated that highly cross-linked polyethylene can reduce acetabular wear to about 0.025 mm per year. Contact Dr. Ranawat to know more on polyethylene acetabular component insertion during total hip arthroplasty.