title: Evaluation of contact characteristics of a patient-specific artificial dysplastic hip joint.
abstract: This study addresses the results of the experimental measurements for the contact surface areas and contact pressure distributions of a dysplastic hip joint. The hip joint consists of pelvis, proximal femur and artificial cartilages for both acetabulum and femoral head. The dysplastic hip joint is modeled in three dimensional (3D) form using the computerized tomography (CT) images obtained in vivo of an adult female patient. The modeled hip joint components are manufactured as a non-natural dysplastic hip joint using different materials and manufacturing processes. The dysplastic hip joint produced is subjected to compression forces experimentally to measure the contact surface area and contact pressure distributions between the femoral head and acetabulum using the pressure sensitive Fuji film. Different types of specific fixtures and molds are designed and manufactured to produce the dysplastic hip joint components and perform the experimental studies. The measured results using a non-natural dysplastic hip joint are compared with relevant results reported in current literature considering the peak and mean contact pressure values. Therefore, the obtained results showed that the non-natural dysplastic hip models can be generated and replaced to determine the contact characteristics for an elusive cadaveric model. In conclusion, the artificial models might be useful to understand the contact pressure distributions and potential changes in surface pressure contours and their effects on the stress distributions.
authors.affiliation: Department of Biomedical Engineering, Kocaeli University, Kocaeli, Turkey.
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Mutlu
authors.affiliation: Department of Automotive, Technical Science Vocational School, Amasya University, Amasya, Turkey.
authors.forename: Levent
authors.initials: L
authors.lastname: Ugur
authors.affiliation: Department of Biomedical Engineering, Kocaeli University, Kocaeli, Turkey.
authors.forename: Talip
authors.initials: T
authors.lastname: Celik
authors.affiliation: Department of Orthopaedics and Traumatology, Kocaeli University, Kocaeli, Turkey.
authors.forename: Levent
authors.initials: L
authors.lastname: Buluc
authors.affiliation: Department of Orthopaedics and Traumatology, Kocaeli University, Kocaeli, Turkey.
authors.forename: Umit Sefa
authors.initials: US
authors.lastname: Muezzinoglu
authors.affiliation: Department of Biomedical Engineering, Kocaeli University, Kocaeli, Turkey.
authors.forename: Yasin
authors.initials: Y
authors.lastname: Kisioglu
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D002138:Calibration; D002356:Cartilage / Q000473:pathology; D005260:Female; D005269:Femur / Q000473:pathology / Q000503:physiopathology; D006618:Hip Dislocation, Congenital / Q000503:physiopathology*; D006621:Hip Joint / Q000503:physiopathology*; D006622:Hip Prosthesis; D006801:Humans; D008953:Models, Anatomic; D011312:Pressure; D013314:Stress, Mechanical; D013718:Tensile Strength