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dc.contributor.author Lee, Seongpung -
dc.contributor.author Kim, Jun Young -
dc.contributor.author Hong, Jaesung -
dc.contributor.author Baek, Seung Hoon -
dc.contributor.author Kim, Shin Yoon -
dc.date.accessioned 2018-08-06T07:08:38Z -
dc.date.available 2018-08-06T07:08:38Z -
dc.date.created 2018-07-25 -
dc.date.issued 2018-08 -
dc.identifier.issn 0513-5796 -
dc.identifier.uri http://hdl.handle.net/20.500.11750/9042 -
dc.description.abstract Purpose: The intraoperative version of the femoral component is usually determined by visual appraisal of the stem position relative to the distal femoral condylar axis. However, several studies have suggested that a surgeon’s visual assessment of the stem position has a high probability of misinterpretation. We developed a computed tomography (CT)-based navigation system with a patient-specific instrument (PSI) capable of three-dimensional (3D) printing and investigated its accuracy and consistency in comparison to the conventional technique of visual assessment of the stem position. Materials and Methods: A CT scan of a femur sawbone model was performed, and pre-experimental planning was completed. We conducted 30 femoral neck osteotomies using the conventional technique and another 30 femoral neck osteotomies using the proposed technique. The femoral medullary canals were identified in both groups using a box chisel. Results: For the absolute deviation between the measured and planned values, the mean two-dimensional anteversions of the proposed and conventional techniques were 1.41° and 4.78°, while their mean 3D anteversions were 1.15° and 3.31°. The mean θ1, θ2, θ3, and d, all of which are parameters for evaluating femoral neck osteotomy, were 2.93°, 1.96°, 5.29°, and 0.48 mm for the proposed technique and 4.26°, 3.17°, 4.43°, and 3.15 mm for the conventional technique, respectively. Conclusion: The CT-based navigation system with PSI was more accurate and consistent than the conventional technique for assessment of stem position. Therefore, it can be used to reduce the frequency of incorrect assessments of the stem position among surgeons and to help with accurate determination of stem anteversion. © Yonsei University College of Medicine 2018. -
dc.language English -
dc.publisher Yonsei University College of Medicine -
dc.title CT-based Navigation System Using a Patient-Specific Instrument for Femoral Component Positioning: An Experimental in vitro Study with a Sawbone Model -
dc.type Article -
dc.identifier.doi 10.3349/ymj.2018.59.6.769 -
dc.identifier.scopusid 2-s2.0-85050113787 -
dc.identifier.bibliographicCitation Yonsei Medical Journal, v.59, no.6, pp.769 - 780 -
dc.identifier.kciid ART002369771 -
dc.description.isOpenAccess TRUE -
dc.subject.keywordAuthor Total hip replacement -
dc.subject.keywordAuthor computer-assisted surgery -
dc.subject.keywordAuthor 3D printing -
dc.subject.keywordPlus TOTAL HIP-ARTHROPLASTY -
dc.subject.keywordPlus COMPUTED-TOMOGRAPHY MEASUREMENT -
dc.subject.keywordPlus STEM ANTEVERSION -
dc.subject.keywordPlus INTRAOPERATIVE ESTIMATION -
dc.subject.keywordPlus ORIENTATION -
dc.subject.keywordPlus SURGERY -
dc.subject.keywordPlus VALIDATION -
dc.subject.keywordPlus PLACEMENT -
dc.subject.keywordPlus TEMPLATE -
dc.subject.keywordPlus ACCURACY -
dc.citation.endPage 780 -
dc.citation.number 6 -
dc.citation.startPage 769 -
dc.citation.title Yonsei Medical Journal -
dc.citation.volume 59 -
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Department of Robotics and Mechatronics Engineering Surgical Robotics & Augmented Reality Lab 1. Journal Articles

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