Impingement and stability of total hip arthroplasty versus femoral head resurfacing using a cadaveric robotics model

We identified and compared the impingent‐free range of motion (ROM) and subluxation potential for native hip, femoral head resurfacing (FHR), and total hip arthroplasty (THA). These constructs were also compared both with and without soft tissue to elucidate the role of the soft tissue. Five fresh‐f...

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Bibliographic Details
Published in:Journal of orthopaedic research 2013-07, Vol.31 (7), p.1108-1115
Main Authors: Colbrunn, R.W., Bottros, J.J., Butler, R.S., Klika, A.K., Bonner, T.F., Greeson, C., van den Bogert, A.J., Barsoum, W.K.
Format: Article
Language:English
Subjects:
Aged
Arthroplasty, Replacement, Hip - methods
Cadaver
femoral head resurfacing
Femur Head - surgery
Hip Joint - surgery
Hip Prosthesis
Humans
impingement
Incidence
Joint Dislocations - epidemiology
Joint Instability - epidemiology
Male
Middle Aged
Prosthesis Design
Range of Motion, Articular
Robotics - methods
soft tissue
stability
total hip arthroplasty
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Summary:We identified and compared the impingent‐free range of motion (ROM) and subluxation potential for native hip, femoral head resurfacing (FHR), and total hip arthroplasty (THA). These constructs were also compared both with and without soft tissue to elucidate the role of the soft tissue. Five fresh‐frozen bilateral hip specimens were mounted to a six‐degree of freedom robotic manipulator. Under load‐control parameters, in vivo mechanics were recreated to evaluate impingement free ROM, and the subluxation potential in two “at risk” positions for native hip, FHR, and THA. Impingement‐free ROM of the skeletonized THA was greater than FHR for the anterior subluxation position. For skeletonized posterior subluxations, stability for THA and FHR constructs were similar, while a different pattern was observed for specimens with soft tissues intact. FHR constructs were more stable than THA constructs for both anterior and posterior subluxations. When the femoral neck is intact the joint has an earlier impingement profile placing the hip at risk for subluxation. However, FHR design was shown to be more stable than THA only when soft tissues were intact. © 2013 Orthopaedic Research Society Published by Wiley Periodicals, Inc. J Orthop Res 31:1108–1115, 2013
ISSN:0736-0266
1554-527X
DOI:10.1002/jor.22342