ID 55304
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Fujii, Yosuke Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Fujiwara, Kazuo Department of Intelligent Orthopaedic System Development, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Tetsunaga, Tomonori Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Miyake, Takamasa Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Yamada, Kazuki Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Endo, Hirosuke Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Abe, Nobuhiro Department of Orthopaedic Surgery, Kawasaki Medical school
Sugita, Naohiko Department of Mechanical Engineering, School of Engineering, The University of Tokyo
Mitsuishi, Mamoru Department of Mechanical Engineering, School of Engineering, The University of Tokyo
Inoue, Takayuki TEIJIN NAKASHIMA MEDICAL CO., LTD
Nakashima, Yoshio TEIJIN NAKASHIMA MEDICAL CO., LTD
Ozaki, Toshifumi Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Abstract
We developed a surface matching-type computed tomography (CT)-based navigation system for total hip arthroplasty (the N-navi; TEIJIN NAKASHIMA MEDICAL, Okayama, Japan). In the registration step, surface matching was performed with digitizing points on the pelvic bone surface after coarse paired matching. In the present study, we made model bones from the CT data of patients whose acetabular shapes had various deformities. We measured the distances and angles after surface matching from the fiducial points and evaluated the ability to correct surface-matching registration on each pelvic form, using several areas and numbers of points. When the surface-matching points were taken on the superior area of the acetabulum, the correction was easy for the external direction, but it was difficult to correct for the anterior and proximal directions. The correction was difficult for external and proximal directions on the posterior area. Each area of surface-matching points has particular directions that are easily corrected and other directions that are difficult to correct. The shape of the pelvis also affected the correction ability. Our present findings suggest that checking the position after coarse paired matching and choosing the surface-matching area and points that are optimal to correct will improve the accuracy of total hip arthroplasty and reduce surgical times.
Keywords
total hip arthroplasty
CT-based navigation system
surface matching
Amo Type
Original Article
Published Date
2017-08
Publication Title
Acta Medica Okayama
Volume
volume71
Issue
issue4
Publisher
Okayama University Medical School
Start Page
279
End Page
289
ISSN
0386-300X
NCID
AA00508441
Content Type
Journal Article
language
英語
Copyright Holders
CopyrightⒸ 2017 by Okayama University Medical School
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publisher
Refereed
True
PubMed ID