large femoral heads
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2020 ◽  
Vol 35 (4) ◽  
pp. 1064-1068 ◽  
Author(s):  
E. Grant Sutter ◽  
Faisal Akram ◽  
Adam Miller ◽  
Wayne G. Paprosky ◽  
Richard A. Berger ◽  
...  

2018 ◽  
Vol 29 (1) ◽  
pp. 83-88 ◽  
Author(s):  
Bradford S Waddell ◽  
Chelsea Koch ◽  
Myra Trivellas ◽  
Jayme C Burket ◽  
Timothy Wright ◽  
...  

Background: Prosthetic impingement is implicated in dislocation after total hip arthroplasty (THA). While use of larger diameter femoral heads reduces the incidence of dislocation, the effect of larger heads upon impingement rate is unknown. We assessed retrieved THA components for evidence of impingement to determine if large femoral heads reduced the rate of impingement in primary THA and what factors might influence impingement. Methods: Liners from 97 primary THAs retrieved at revision arthroplasty were scored for evidence of impingement, defined as wear or deformation on the rim of the component. Component inclination and version were measured from anteroposterior and cross-table lateral radiographs. Results: Independent of revision diagnosis, 77% of liners demonstrated evidence of impingement. Impingement was less prevalent and less severe as head size increased. Severe impingement was observed in 50% of the liners with 28-mm heads, 15% of liners with 32-mm heads, and 21% of liners with 36-mm heads. Regardless of head size, 76% of liners revised for instability demonstrated impingement. Decreased head-neck ratio, use of an elevated liner, increased length of implantation, and increased version were associated with increased severity of impingement. Discussion: We showed that larger head sizes are associated with decreased incidence of impingement on retrieved acetabular liners when compared to smaller head sizes. Larger heads have reduced but not eliminated impingement, which remains a potential source of instability.


2017 ◽  
Vol 32 (10) ◽  
pp. 3071-3075 ◽  
Author(s):  
Brian P. Chalmers ◽  
Kevin I. Perry ◽  
Arlen D. Hanssen ◽  
Mark W. Pagnano ◽  
Matthew P. Abdel

2016 ◽  
Vol 0 (1) ◽  
pp. 15
Author(s):  
Alon Grundshtein ◽  
Ofir Chechik ◽  
Ran Schwarzkopf ◽  
Ely Steinberg ◽  
Oleg Dolkart ◽  
...  

Hip & Pelvis ◽  
2016 ◽  
Vol 28 (3) ◽  
pp. 134 ◽  
Author(s):  
Myung-Rae Cho ◽  
Won Kee Choi ◽  
Jae Jung Kim

2015 ◽  
Vol 26 (1) ◽  
pp. 28-33
Author(s):  
Kartik Mangudi Varadarajan ◽  
Thomas Zumbrunn ◽  
Michael P. Duffy ◽  
Rajan Patel ◽  
Harry E. Rubash ◽  
...  

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
David Morley ◽  
Ian Starks ◽  
Justin Lim

We report the first case of a fracture of the standard C-stem in combination with a large metal-on-metal articulation. This occurred at the head-neck junction. Analysis of the fractured stem showed evidence of fatigue failure with possible corrosion. The use of large femoral heads with neck adaptors and narrow tapers should be used with caution, especially in heavy, active patients.


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