scholarly journals Trunnion design and femoral head diameter increase corrosion at the taper interface in retrieved large-diameter metal-on-metal total hip arthroplasty

2012 ◽  
Vol 10 (8) ◽  
pp. S55
Author(s):  
Adam Hexter ◽  
Anna Panagiotidou ◽  
Gordon Blunn ◽  
John Skinner ◽  
Alister Hart
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Large Diameter ◽  
Head Diameter ◽  
Total Hip ◽  
Femoral Head Diameter ◽  
Metal On Metal

scholarly journals Does Choice of Head Size and Neck Geometry Affect Stem Migration in Modular Large-Diameter Metal-on-Metal Total Hip Arthroplasty? A Preliminary Analysis

2012 ◽  
Vol 6 (1) ◽  
pp. 593-600 ◽  
Author(s):  
CS Georgiou ◽  
KG Evangelou ◽  
EG Theodorou ◽  
CG Provatidis ◽  
PD Megas
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Large Diameter ◽  
Head Diameter ◽  
Total Hip ◽  
Modular Stem ◽  
Metal On Metal ◽  
Distal Migration ◽  
Femoral Heads ◽  
Stem Migration

Due to their theoretical advantages, hip systems combining modular necks and large diameter femoral heads have gradually gained popularity. However, among others, concerns regarding changes in the load transfer patterns were raised. Recent stress analyses have indeed shown that the use of modular necks and big femoral heads causes significant changes in the strain distribution along the femur. Our original hypothesis was that these changes may affect early distal migration of a modular stem. We examined the effect of head diameter and neck geometry on migration at two years of follow-up in a case series of 116 patients (125 hips), who have undergone primary Metal-on-Metal total hip arthroplasty with the modular grit-blasted Profemur®E stem combined with large-diameter heads (>36 mm). We found that choice of neck geometry and head diameter has no effect on stem migration. A multivariate regression analysis including the potential confounding variables of the body mass index, bone quality, canal fill and stem positioning revealed only a negative correlation between subsidence and canal fill in midstem area. Statistical analysis, despite its limitations, did not confirm our hypothesis that choice of neck geometry and/or head diameter affects early distal migration of a modular stem. However, the importance of correct stem sizing was revealed.

Influence of femoral head diameter on intraoperative range of motion in total hip arthroplasty

2019 ◽  
Vol 6 (3) ◽  
pp. 175-179
Author(s):  
Nobuhiro Kaku ◽  
Hiroaki Tagomori ◽  
Hiroya Akase ◽  
Shouhei Noda ◽  
Masashi Kataoka ◽  
...  
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Range Of Motion ◽  
Hip Arthroplasty ◽  
Head Diameter ◽  
Total Hip ◽  
Femoral Head Diameter
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