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Patient‐specific assessment of dysmorphism of the femoral head–neck junction: a statistical shape model approach
Author(s) -
Khanduja Vikas,
Baelde Nick,
Dobbelaere Andreas,
Van Houcke Jan,
Li Hao,
Pattyn Christophe,
Audenaert Emmanuel A.
Publication year - 2016
Publication title -
the international journal of medical robotics and computer assisted surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 53
eISSN - 1478-596X
pISSN - 1478-5951
DOI - 10.1002/rcs.1726
Subject(s) - femoral head , medicine , head and neck , anatomy , femur , orthodontics , surgery
Background Objective quantification of anatomical variations about the femur head–neck junction in pre‐operative planning for surgical intervention in femoro‐acetabular impingement is problematic, as no clear definition of average normal anatomy for a specific subject exists. Methods We have defined the normal‐equivalent of a subject's anatomy by using a statistical shape model and geometric shape optimization for finding correspondences, while excluding the femoral head–neck junction during the fitting procedure. The presented technique was evaluated on a cohort of 20 patients. Results Difference in α ‐angle measurement between the actual morphology and the predicted normal‐equivalent, averaged 1.3° (SD 1.7°) in the control group versus 8° (SD 7.3°) in the patient group (p < 0.05). Conclusions Defining normal equivalent anatomy is effective in quantifying anatomical dysmorphism of the femoral head–neck junction and as such can improve presurgical analysis of patients diagnosed with femoro‐acetabular impingement. Copyright © 2016 John Wiley & Sons, Ltd.