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Article: Sagittal pelvic mal-rotation and positioning of the acetabular component in total hip arthroplasty: Three-dimensional computer model analysis

TitleSagittal pelvic mal-rotation and positioning of the acetabular component in total hip arthroplasty: Three-dimensional computer model analysis
Authors
KeywordsAcetabular component
Arthroplasty
Hip
Pelvic rotation
Positioning
Issue Date2007
PublisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www.elsevier.com/locate/orthres
Citation
Journal Of Orthopaedic Research, 2007, v. 25 n. 6, p. 766-771 How to Cite?
AbstractMal-rotation of pelvis on the sagittal plane, which is common in patients with fixed spinal kyhposis, for example, ankylosing spondylitis, can cause error in cup positioning when hip arthroplasty is performed. The present study was performed to quantify the effects of sagittal pelvic mal-rotation on the final cup position and to evaluate different methods of cup positioning to compensate for the mal-rotation. Three-dimensional reconstruction of computer tomograms of 15 sets of full pelvi was performed. Two methods of cup insertion were simulated and compared: a method mimicking genuine surgery (anatomical positioning) and one that compensates for the sagittal pelvic mal-rotation (functional positioning). Sagittal pelvic mal-rotation of more than 20°, if ignored, resulted in a cup with an anterversion of more than 30° and an inclination of more than 55°. Half of the cup surface was not in contact with host bone when the cup position was maintained at 20° anteversion and 45° inclination in a patient with 50° sagittal pelvic mal-rotation. The usual method of cup positioning may need to be modified in patients with sagittal pelvic mal-rotation in order to maintain the desired cup position. For each 10° of sagittal pelvic mal-rotation beyond 20° of mal-rotation, the cup needs to be put in such that it is 5° less inclined and anteverted. © 2007 Orthopaedic Research Society. Published by Wiley Periodicals, Inc.
Persistent Identifierhttp://hdl.handle.net/10722/79606
ISSN
2015 Impact Factor: 2.807
2015 SCImago Journal Rankings: 1.464
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTang, WMen_HK
dc.contributor.authorChiu, KYen_HK
dc.contributor.authorKwan, MFYen_HK
dc.contributor.authorNg, TPen_HK
dc.date.accessioned2010-09-06T07:56:33Z-
dc.date.available2010-09-06T07:56:33Z-
dc.date.issued2007en_HK
dc.identifier.citationJournal Of Orthopaedic Research, 2007, v. 25 n. 6, p. 766-771en_HK
dc.identifier.issn0736-0266en_HK
dc.identifier.urihttp://hdl.handle.net/10722/79606-
dc.description.abstractMal-rotation of pelvis on the sagittal plane, which is common in patients with fixed spinal kyhposis, for example, ankylosing spondylitis, can cause error in cup positioning when hip arthroplasty is performed. The present study was performed to quantify the effects of sagittal pelvic mal-rotation on the final cup position and to evaluate different methods of cup positioning to compensate for the mal-rotation. Three-dimensional reconstruction of computer tomograms of 15 sets of full pelvi was performed. Two methods of cup insertion were simulated and compared: a method mimicking genuine surgery (anatomical positioning) and one that compensates for the sagittal pelvic mal-rotation (functional positioning). Sagittal pelvic mal-rotation of more than 20°, if ignored, resulted in a cup with an anterversion of more than 30° and an inclination of more than 55°. Half of the cup surface was not in contact with host bone when the cup position was maintained at 20° anteversion and 45° inclination in a patient with 50° sagittal pelvic mal-rotation. The usual method of cup positioning may need to be modified in patients with sagittal pelvic mal-rotation in order to maintain the desired cup position. For each 10° of sagittal pelvic mal-rotation beyond 20° of mal-rotation, the cup needs to be put in such that it is 5° less inclined and anteverted. © 2007 Orthopaedic Research Society. Published by Wiley Periodicals, Inc.en_HK
dc.languageengen_HK
dc.publisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www.elsevier.com/locate/orthresen_HK
dc.relation.ispartofJournal of Orthopaedic Researchen_HK
dc.rightsJournal of Orthopaedic Research. Copyright © John Wiley & Sons, Inc.en_HK
dc.subjectAcetabular componenten_HK
dc.subjectArthroplastyen_HK
dc.subjectHipen_HK
dc.subjectPelvic rotationen_HK
dc.subjectPositioningen_HK
dc.titleSagittal pelvic mal-rotation and positioning of the acetabular component in total hip arthroplasty: Three-dimensional computer model analysisen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0736-0266&volume=25&issue=6&spage=766&epage=771&date=2007&atitle=Sagittal+pelvic+mal-rotation+and+positioning+of+the+acetabular+component+in+total+hip+arthroplasty:+three-dimensional+computer+model+analysisen_HK
dc.identifier.emailChiu, KY:pkychiu@hkucc.hku.hken_HK
dc.identifier.authorityChiu, KY=rp00379en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/jor.20225en_HK
dc.identifier.pmid17343279-
dc.identifier.scopuseid_2-s2.0-34249748966en_HK
dc.identifier.hkuros129728en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34249748966&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume25en_HK
dc.identifier.issue6en_HK
dc.identifier.spage766en_HK
dc.identifier.epage771en_HK
dc.identifier.isiWOS:000246541300008-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridTang, WM=7403430820en_HK
dc.identifier.scopusauthoridChiu, KY=7202988127en_HK
dc.identifier.scopusauthoridKwan, MFY=7005364440en_HK
dc.identifier.scopusauthoridNg, TP=24438193400en_HK

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