Open AccessNovel Acetabular Cup for Revision THA Improves Hip Center of Rotation: A Radiographic Evaluation
Author(s) -
Anton Khlopas,
Morad Chughtai,
Randa K. Elmallah,
David Hip-Flores,
Arthur L. Malkani,
Steven F. Harwin,
Michael A. Mont,
Michael D. Ries
Publication year - 2018
Publication title -
clinical orthopaedics and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.178
H-Index - 204
eISSN - 1528-1132
pISSN - 0009-921X
DOI - 10.1007/s11999.0000000000000034
Subject(s) - medicine , acetabulum , radiography , instant centre of rotation , fixation (population genetics) , orthodontics , surgery , biomechanics , orthopedic surgery , displacement (psychology) , rotation (mathematics) , anatomy , population , geometry , mathematics , environmental health , psychology , psychotherapist
Bone loss in patients undergoing revision THA poses a considerable challenge for orthopaedic surgeons. Often, to achieve better fixation in remaining bone, larger diameter acetabular components and reaming superiorly may be necessary. However, this is likely to raise the hip center of rotation, which may lead to altered biomechanics, specifically, insufficiency of the abductor muscles, altered gait, and increased risk of dislocation from impingement. More recently, a newer acetabular shell has been designed to more closely replicate the native hip center of rotation in these circumstances while maintaining adequate fixation.