- Loose or Slipped Acetabulum Cups by Dr. Bose
- DePuy Orthopaedics Discontinuation of ULTAMET Metal-on-Metal
- Dr. Su responds to recent Lancvet Article about failoure rates
- Hip Resurfacing Problems
- Knowing the cause of resurfacing failure can ensure successful conversion to THR by Dr. Su
- I Have Bone Cysts, Can I Have a Hip Resurfacing?
- Bone Cysts by Dr. Scott Rubinstein
- Pseudotumours Risk For Hip Resurfacing Highlights
- DuPuy Reaches $2.5 Bln Deal
The issue of cup slippage in the immediate postop period is a controversial one.
While bone ingrowth takes around 6 wks. – the hydroxy apatite to bone chemical reaction can occur much more quickly.
If we surgeons feel that the cup is not perfectly tight ( press fit) during the surgery then we restrict activities for a 6 -8 wk period .This is done in the hope that no precipitating … Read the rest
DePuy Orthopaedics, Inc. Statement on
Discontinuation of ULTAMET Metal-on-Metal and
COMPLETE Ceramic-on-Metal Hip Systems
DePuy Orthopaedics, Inc., announced its decision
to discontinue sales of its ULTAMET
Metal-on-Metal Articulation and COMPLETE
Ceramic-on-Metal Acetabular Hip System
worldwide. The discontinuation will be effective
August 31, 2013. This will allow surgeons to
plan accordingly for upcoming surgeries. The
ceramic head used in COMPLETE will continue to
be available for use in other bearing surface… Read the rest
I would like to take this opportunity to comment on the Lancet article, “Failure rates of metal-on-metal hip resurfacings: analysis of data from the National Joint Registry for England and Wales”, by Professor AW Blom, published on October 2, 2012.First of all, this is an observational scientific study with valid research design and questions; however, the conclusions point out the limitations of registry
Knowing the cause of resurfacing failure can ensure successful conversion to THR by Edwin Su, MD
The shell can be retained in cases involving femoral neck fracture, femoral loosening or impingement.
Causes of failure
“The cause of failure must be carefully assessed prior to the conversion surgery in order to ensure an optimal THR outcome,” Su said. He noted that femoral neck fracture is the primary cause of
Dr. Bose – I have bone cysts, can I have a hip resurfacing?
The presence of a cysts by itself is not a contraindication for resurfacing. It does not preclude resurfacing automatically. One must keep in mind that cyst formation is a natural occurrence in osteoarthritis and is very common though the extent, quantity & location may vary.
Cysts are of course much more common and invariably present in AVN. … Read the rest
|By Dr. Rubinstein
2860 N. Broadway Suite 202
Chicago, IL 60657
|Cysts are very common in arthritic hips and can usually be
seen on x-rays. Most of the time they are not a problem with
resurfacing because they are small and in the part of the bone removed in
milling the femoral head for a resurf. Most larger ones can be filled
with a cement of
July 11, 2008As the incidence of metal-on-metal hip resurfacing has increased in recent years, especially in younger patients, research published in the Journal of Bone and Joint Surgery – British Volume (JBJS-Br) discusses occurrences of “pseudotumours” as a result. The researchers estimate that approximately 1% of patients who have metal-on-metal hip resurfacings develop pseudotumours within five years of treatment. A pseudotumour is ‘a soft-tissue mass associated with
If an HRA has failed, I try to solve the problem by revising only the acetabular component whenever possible because HRA are functionally better than THR. If only the acetabular component is revised, the patient still has a HRA. If the femoral component is revised, the patient now has a THA.
Currently revising only the acetabular component with a … Read the rest
By Dr. Koen De Smet & Dr. Alessandro Calistri
Acoustic Phenomena in Hip Resurfacing 2009 Koen De Smet, MD; Alessandro Calistri, MDAMC Ghent, Krijgslaan 181, 9000 Ghent, Belgium Background: While providing superior hardness and improved wear characteristics, hard bearings such as metal-on-metal, or ceramic-on-ceramics bearings have different lubrication properties than hard on soft (metal- or ceramic-on-poly) bearing couples. A failure in this lubrication mechanism in metal-on-metal resurfacing… Read the rest
Memo sent from Dr. Dorr to the American Association of Hip and Knee Surgeons that deals with what he feels is the cause for the hip implant failures: MEMO DATE: 4/22/08 TO: American Association of Hip and Knee Surgeons
FROM: Larry Dorr, M.D.
RE: This NOTICE is to inform you that we have had ten revisions in 165 hips and have four more that need to be revised using the