Hip replacement surgery has gone through tremendous evolution since the first procedure in 1840. In the past five decades the advances that have been made in technology, advanced and smart materials innovations, surgical techniques, robotic surgery and methods of fixations and sterilization, facilitated hip implants that undergo multiple design revolutions seeking the least problematic implants...

BACKGROUND There are concerns that metal-on-metal hip implants may cause cancer. The objective of this study was to evaluate patterns and timing of risk of cancer in patients with metal-on-metal total hip replacements (THR). METHODS In a linkage study between the English National Joint Registry (NJR) and the Clinical Practice Research Datalink (CPRD), we selected all THR surgeries (NJR) betwe...

Lubrication plays an important role in the clinical performance of the ceramic-on-ceramic (CoC) hip implant in terms of reducing wear and avoiding squeaking. All the previous lubrication analyses of CoC hip implants assumed that synovial fluid was sufficiently supplied to the contact area. The aim of this study was to investigate the lubrication performance of the CoC hip implant under starved ...

BACKGROUND The regulation of medical devices has attracted controversy recently because of problems related to metal-on-metal hip implants. There is growing evidence that metal-on-metal implants fail early and cause local and systemic complications. However, the failure associated with metal-on-metal head size is not consistently documented and needs to be communicated to patients and surgeons....

OBJECTIVE To assess the risk of cancer associated with modern primary metal-on-metal hip replacements. DESIGN Population based study. SETTING Nationwide retrospective comparative register. PARTICIPANTS 10,728 patients who underwent metal-on-metal total hip arthroplasty and 18,235 patients who underwent conventional metal-on-polyethylene, ceramic-on-polyethylene, and ceramic-on-ceramic tot...

A 71-year-old female with a history of right total hip arthroplasty presented with an enlarging pseudotumor. Pseudotumor is a known complication following metal-on-metal and metal-on-conventional polyethylene and metal-on-highly cross-linked polyethylene implants. Revision total hip arthroplasty following resection of pseudotumor has resulted in an increase in incidence of postoperative complic...

The greatest concern after metal-on-metal hip resurfacing may be the development of metallosis. Metallosis is an adverse tissue reaction to the metal debris generated by the prosthesis and can be seen with implants and joint prostheses. The reasons patients develop metallosis are multifactorial, involving patient, surgical, and implant factors. Contributing factors may include component malposi...

Aseptic loosening and periprosthetic osteolysis are major problems in artificial hip joint surgery,for which a solution has yet to be found. Biological host response to wear debris combined with cyclic mechanical loading onto the bone bed around hip prosthetic implants has been considered as mechanism responsible for implant-mediated periprosthetic osteolysis. Any type of artificial joint glidi...

Background: There has been a resurgence in the interest and use of metal-on-metal (MOM) bearing surfaces in hip arthroplasty. However, concerns remain regarding elevated metal levels in blood and urine and possible effect on the fetus of a pregnant female with a MOM bearing surface. Purpose: The purpose of this study is to compare metal concentrations in maternal and fetal serum in subjects wit...