Details

Autor(en) / Beteiligte

• Kao, Y. Julia, MD
• Koch, Chelsea, BS
• Wright, Timothy, PhD
• Padgett, Douglas, MD

Titel

Flexural Rigidity, Taper Angle, and Contact Length Affect Fretting of the Femoral Stem Trunnion in Total Hip Arthroplasty

Ist Teil von

• The Journal of arthroplasty, 2016-09, Vol.31 (9), p.254-258

Ort / Verlag

United States: Elsevier Inc

Erscheinungsjahr

2016

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• Abstract Background Modularity at the head-neck junction in total hip arthroplasty (THA) allows for intraoperative adjustments, but may be a source of metallic debris. We determined how flexural rigidity, taper angle, contact length, and lever arm affect fretting and corrosion at this junction. Methods 77 metal-on-polyethylene THAs retrieved over a 10-year period at a single institution were obtained. Head tapers and stem trunnions were graded for fretting and corrosion. Results Stem fretting was inversely related to rigidity and taper angle, while positively correlated to contact length. Head fretting and head and stem corrosion were not associated with any of these parameters. Conclusion Design and assembly factors at the modular head-neck connection affected stem fretting among the retrieved components, suggesting that these parameters are important to consider when choosing a modular system.