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Article: Radiographic assessment of pedicle hook placement

TitleRadiographic assessment of pedicle hook placement
Authors
KeywordsPedicle anatomy and radiology
Pedicle hook
Scoliosis surgery
Issue Date1997
PublisherLippincott, Williams & Wilkins. The Journal's web site is located at http://www.spinejournal.com
Citation
Spine, 1997, v. 22 n. 18, p. 2106-2111 How to Cite?
AbstractStudy Design. A cadaveric study of the changes in the radiographic morphology of the thoracic pedicle with vertebral rotation. Objective. To study the effect of vertebral rotation on the assessment of pedicle hook placement by determining the radiographic anatomy of the pedicle and its relation to the pedicle hook. Summary and Background Data. It is commonly assumed that the oval pedicle shadow, seen on spine radiographs is formed by the waist of the pedicle. The postoperative assessment of pedicle hook position is based on this assumption. Methods. Thoracic cadaveric vertebrate between T5 and T8 were studied; with wire markers placed at the waist, the pedicle facet junction, and the pedicle body junction. Thoracic pedicle hooks were placed in the correct position and offset to one side. Radiographs of the vertebral body were taken from 0°to 30°of rotation with reference to the sagittal plane. Results. The radiographic morphology of the pedicle changes with vertebral rotation; it also differs between the concave and the convex side of a scoliotic spine. With rotation of less than 20°, the pedicle shadow is formed by the waist on both sides. With 30°of rotation, the concave pedicle shadow is formed by the pedicle facet junction, whereas on the convex side, it is over lapped by the transverse process shadow. A laterally misplaced hook on the convex side and a medially misplaced hook on the concave side can appear correctly located with vertebral rotation. Conclusion. The oval pedicle shadow is not simply represented by the waist of the pedicle. An understanding of the changes in radiographic morphology with rotation is necessary for the assessment of thoracic pedicle hook location after surgery.
Persistent Identifierhttp://hdl.handle.net/10722/79340
ISSN
2015 Impact Factor: 2.439
2015 SCImago Journal Rankings: 1.459
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCheung, KMCen_HK
dc.contributor.authorLuk, KDKen_HK
dc.contributor.authorLeong, JCYen_HK
dc.date.accessioned2010-09-06T07:53:34Z-
dc.date.available2010-09-06T07:53:34Z-
dc.date.issued1997en_HK
dc.identifier.citationSpine, 1997, v. 22 n. 18, p. 2106-2111en_HK
dc.identifier.issn0362-2436en_HK
dc.identifier.urihttp://hdl.handle.net/10722/79340-
dc.description.abstractStudy Design. A cadaveric study of the changes in the radiographic morphology of the thoracic pedicle with vertebral rotation. Objective. To study the effect of vertebral rotation on the assessment of pedicle hook placement by determining the radiographic anatomy of the pedicle and its relation to the pedicle hook. Summary and Background Data. It is commonly assumed that the oval pedicle shadow, seen on spine radiographs is formed by the waist of the pedicle. The postoperative assessment of pedicle hook position is based on this assumption. Methods. Thoracic cadaveric vertebrate between T5 and T8 were studied; with wire markers placed at the waist, the pedicle facet junction, and the pedicle body junction. Thoracic pedicle hooks were placed in the correct position and offset to one side. Radiographs of the vertebral body were taken from 0°to 30°of rotation with reference to the sagittal plane. Results. The radiographic morphology of the pedicle changes with vertebral rotation; it also differs between the concave and the convex side of a scoliotic spine. With rotation of less than 20°, the pedicle shadow is formed by the waist on both sides. With 30°of rotation, the concave pedicle shadow is formed by the pedicle facet junction, whereas on the convex side, it is over lapped by the transverse process shadow. A laterally misplaced hook on the convex side and a medially misplaced hook on the concave side can appear correctly located with vertebral rotation. Conclusion. The oval pedicle shadow is not simply represented by the waist of the pedicle. An understanding of the changes in radiographic morphology with rotation is necessary for the assessment of thoracic pedicle hook location after surgery.en_HK
dc.languageengen_HK
dc.publisherLippincott, Williams & Wilkins. The Journal's web site is located at http://www.spinejournal.comen_HK
dc.relation.ispartofSpineen_HK
dc.subjectPedicle anatomy and radiologyen_HK
dc.subjectPedicle hooken_HK
dc.subjectScoliosis surgeryen_HK
dc.titleRadiographic assessment of pedicle hook placementen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0887-9869&volume=22&issue=18&spage=2106&epage=2111&date=1997&atitle=Radiographic+assessment+of+pedicle+hook+placementen_HK
dc.identifier.emailCheung, KMC:cheungmc@hku.hken_HK
dc.identifier.emailLuk, KDK:hcm21000@hku.hken_HK
dc.identifier.authorityCheung, KMC=rp00387en_HK
dc.identifier.authorityLuk, KDK=rp00333en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1097/00007632-199709150-00008en_HK
dc.identifier.pmid9322322-
dc.identifier.scopuseid_2-s2.0-0031429136en_HK
dc.identifier.hkuros34900en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0031429136&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume22en_HK
dc.identifier.issue18en_HK
dc.identifier.spage2106en_HK
dc.identifier.epage2111en_HK
dc.identifier.isiWOS:A1997XX08300008-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridCheung, KMC=7402406754en_HK
dc.identifier.scopusauthoridLuk, KDK=7201921573en_HK
dc.identifier.scopusauthoridLeong, JCY=35560782200en_HK

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