Abstract：
:Accurate measurement of six-degrees-of-freedom in-vivo kinematics of the total hip arthroplasty (THA) is essential in gaining insights into in-vivo THA performance. The objective of this study was to validate a novel dual fluoroscopy imaging system (DFIS) for determination of the THA kinematics using both in-vitro and in-vivo approaches. The in-vitro validation utilized cadaveric hip specimens to compare the THA motion using the DFIS technique with those measured by a radiostereometric analysis (RSA). The differences between the DFIS technique and the RSA were within 0.33±0.81 mm (mean±SD) in translation and 0.45±0.65° in rotation during dynamic motion of the hips. In the in-vivo validation, the THA kinematics of two patients during a treadmill gait was assessed for the feasibility/repeatability of the DFIS technique in measurement of THA kinematics. The poses of the THAs during the treadmill gait was measured using the DFIS technique with the maximum standard deviation of 0.35 mm in translation and of 0.55° in rotation. This study demonstrated that the DFIS technique has comparable accuracy of the RSA and is highly repeatable for measurement of dynamic THA motion, suggesting that the DFIS is a promising tool in evaluating the in-vivo THA biomechanics during functional activities.
journal_name
J Biomechjournal_title
Journal of biomechanicsauthors
Tsai TY,Li JS,Wang S,Lin H,Malchau H,Li G,Rubash H,Kwon YMdoi
10.1016/j.jbiomech.2013.02.010subject
Has Abstractpub_date
2013-04-26 00:00:00pages
1300-4issue
7eissn
0021-9290issn
1873-2380pii
S0021-9290(13)00090-0journal_volume
46pub_type
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