title: Computer-integrated revision total hip replacement surgery: concept and preliminary results.
abstract: This paper describes an ongoing project to develop a computer-integrated system to assist surgeons in revision total hip replacement (RTHR) surgery. In RTHR surgery, a failing orthopedic hip implant, typically cemented, is replaced with a new one by removing the old implant, removing the cement and fitting a new implant into an enlarged canal broached in the femur. RTHR surgery is a difficult procedure fraught with technical challenges and a high incidence of complications. The goals of the computer-based system are the significant reduction of cement removal labor and time, the elimination of cortical wall penetration and femur fracture, the improved positioning and fit of the new implant resulting from precise, high-quality canal milling and the reduction of bone sacrificed to fit the new implant. Our starting points are the ROBODOC system for primary hip replacement surgery and the manual RTHR surgical protocol. We first discuss the main difficulties of computer-integrated RTHR surgery and identify key issues and possible solutions. We then describe possible system architectures and protocols for preoperative planning and intraoperative execution. We present a summary of methods and preliminary results in CT image metal artifact removal, interactive cement cut-volume definition and cement machining, anatomy-based registration using fluoroscopic X-ray images and clinical trials using an extended RTHR version of ROBODOC. We conclude with a summary of lessons learned and a discussion of current and future work.
authors.affiliation: Computer Science Department, The Johns Hopkins University, Baltimore, MD, USA. rht@cs.jhu.edu
authors.forename: R H
authors.initials: RH
authors.lastname: Taylor
authors.forename: L
authors.initials: L
authors.lastname: Joskowicz
authors.forename: B
authors.initials: B
authors.lastname: Williamson
authors.forename: A
authors.initials: A
authors.lastname: Guéziec
authors.forename: A
authors.initials: A
authors.lastname: Kalvin
authors.forename: P
authors.initials: P
authors.lastname: Kazanzides
authors.forename: R
authors.initials: R
authors.lastname: Van Vorhis
authors.forename: J
authors.initials: J
authors.lastname: Yao
authors.forename: R
authors.initials: R
authors.lastname: Kumar
authors.forename: A
authors.initials: A
authors.lastname: Bzostek
authors.forename: A
authors.initials: A
authors.lastname: Sahay
authors.forename: M
authors.initials: M
authors.lastname: Börner
authors.forename: A
authors.initials: A
authors.lastname: Lahmer
mesh_terms: D000465:Algorithms; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D016477:Artifacts; D001843:Bone Cements; D002138:Calibration; D005471:Fluoroscopy / Q000379:methods; D006621:Hip Joint / Q000000981:diagnostic imaging* / Q000601:surgery*; D006801:Humans; D007432:Intraoperative Period; D011300:Preoperative Care; D011475:Prosthesis Failure; D011856:Radiographic Image Enhancement / Q000379:methods*; D012086:Reoperation; D015203:Reproducibility of Results; D012371:Robotics; D013499:Surface Properties; D013813:Therapy, Computer-Assisted; D014057:Tomography, X-Ray Computed
chemical_list: D001843:Bone Cements