title: Robot-assisted primary cementless total hip arthroplasty using surface registration techniques: a short-term clinical report.
abstract: OBJECTIVE
  The purpose of this study was to compare non-fiducial based surface registration technique (DigiMatch) with the conventional locator pin-based registration technique in performing cementless total hip arthroplasty (THA) using ROBODOC system.
  
  
  METHODS
  Eighty-one THA were performed using pin-based technique and forty-three were performed using the DigiMatch technique. The average follow-up term was 38 months.
  
  
  RESULTS
  Postoperatively, the Japanese Orthopedic Association hip scores were significantly better in the DigiMatch group than in pin-based group. The accuracy of postoperative stem alignment of the DigiMatch technique was comparable with that of pin-based method.
  
  
  CONCLUSIONS
  No need for prior pin implantation surgery and no concern for pin related knee pain were the advantages of DigiMatch technique. Short-term follow-up clinical results showed that DigiMatch ROBODOC THA was safe and effective.
authors.affiliation: Center of Arthroplasty, Kyowakai Hospital, 1-24-1 Kishibe-kita, Suita-city, Osaka, 564-0001, Japan. nnakamu@abox2.so-net.ne.jp
authors.forename: Nobuo
authors.initials: N
authors.lastname: Nakamura
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Sugano
authors.forename: Takashi
authors.initials: T
authors.lastname: Nishii
authors.forename: Hidenobu
authors.initials: H
authors.lastname: Miki
authors.forename: Akihiro
authors.initials: A
authors.lastname: Kakimoto
authors.forename: Mitsuyoshi
authors.initials: M
authors.lastname: Yamamura
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000000981:diagnostic imaging / Q000601:surgery*; D012189:Retrospective Studies; D012371:Robotics / Q000379:methods*; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome