Taper corrosion at the modular junctions of total hip arthroplasty (THA) femoral stems are known to cause locally destructive adverse local tissue reaction (ALTR). However, the implants at risk remain to be fully elucidated.
We report the case of a 76-year-old woman with hip pain, abductor weakness, and sciatic nerve symptoms 2 years following metal-on-polyethylene THA. Serum cobalt levels were elevated, while chromium levels were normal. Magnetic resonance imaging demonstrated ALTR. The patient’s symptoms resolved following head and liner exchange with ceramic head and titanium sleeve.
Previous studies have reported ALTR secondary to head-neck taper corrosion in cobalt chrome alloy and titanium alloy stems used in metal-on-polyethylene (MoP) THA. The stems described above span 4 manufacturers with varying taper geometries. To our knowledge, this is the first report of ALTR due to head-neck taper corrosion in a Stryker Meridian titanium-molybdenum-zirconium-iron (TMZF) alloy stem.
Close surveillance for ALTR may be considered in patients with this prosthesis. Further investigation of the TMZF alloy and V40 taper geometry of this stem may guide future implant design.
Hip Int 2016; 26(6): e49 - e51
Article Type: CASE REPORT
AuthorsSonika Patel, Carl T. Talmo, Sumon Nandi
- • Accepted on 16/07/2016
- • Available online on 15/10/2016
- • Published online on 10/11/2016
This article is available as full text PDF.
- Patel, Sonika [PubMed] [Google Scholar] 1
- Talmo, Carl T. [PubMed] [Google Scholar] 2
- Nandi, Sumon [PubMed] [Google Scholar] 3, * Corresponding Author (email@example.com)
Tufts University School of Medicine, Boston - USA
New England Baptist Hospital, Boston - USA
Department of Orthopaedic Surgery, The University of Toledo College of Medicine and Life Sciences, Toledo - USA