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Conference Paper: How much apical derotation occurs as a result of coronal curve correction in AIS assessment using the fulcrum bending radiograph

TitleHow much apical derotation occurs as a result of coronal curve correction in AIS assessment using the fulcrum bending radiograph
Authors
Issue Date2010
Citation
The 7th SICOT/SIROT Annual International Conference combined meeting with the Swedish Orthopaedic Association (SOF), Gothenburg, Sweden, 31 August-3 September 2010. How to Cite?
AbstractINTRODUCTION: Various studies have reported vertebral derotational effects with different implant constructs and surgical techniques. However none of them has considered the spontaneous coupling effect on vertebral derotation produced by correction of coronal deformity. METHOD: Patients aged between 10 to 20 years who suffered from Lenke type 1 idiopathic scoliosis with Cobb angles more than 45° and underwent posterior spinal fusion were prospectively included. Scoliosis Cobb angles and apical vertebral rotations in standing, supine and fulcrum bending positions before surgery, and in supine position after surgery, were measured on x-rays and CT scans. They were compared using paired t-test. RESULTS: Eighteen patients were included. The mean age at surgery was 15.5yr. The Cobb angles and apical vertebral rotations in standing, supine and fulcrum bending positions before surgery and in supine position after surgery were 54°,26°; 40°,19° ; 17°,10°; and 14°,8° respectively. The differences in Cobb angles and apical vertebral rotation between standing, supine and fulcrum bending positions were statistically significant. The differences in Cobb angle and apical vertebral rotation between fulcrum bending position and postoperation were statistically insignificant. DISCUSSION AND CONCLUSION: Our study demonstrated that spontaneous apical derotation occurred concomittently with correction of the coronal deformity. The amount of vertebral derotation achievable under fulcrum bending may predict the post-operative vertebral rotation correction. Apical rotation was corrected by 27% on supine and 62% on fulcrum bending positions. Such spontaneous derotation effect should be considered when assessing the effects with different implants and surgical strategies.
DescriptionPoster Session - Spine: abstract no. 24291
Persistent Identifierhttp://hdl.handle.net/10722/142860

 

DC FieldValueLanguage
dc.contributor.authorLuk, KDKen_US
dc.contributor.authorCheung, WYen_US
dc.contributor.authorCheung, KMCen_US
dc.contributor.authorWong, YWen_US
dc.date.accessioned2011-10-28T02:57:33Z-
dc.date.available2011-10-28T02:57:33Z-
dc.date.issued2010en_US
dc.identifier.citationThe 7th SICOT/SIROT Annual International Conference combined meeting with the Swedish Orthopaedic Association (SOF), Gothenburg, Sweden, 31 August-3 September 2010.en_US
dc.identifier.urihttp://hdl.handle.net/10722/142860-
dc.descriptionPoster Session - Spine: abstract no. 24291-
dc.description.abstractINTRODUCTION: Various studies have reported vertebral derotational effects with different implant constructs and surgical techniques. However none of them has considered the spontaneous coupling effect on vertebral derotation produced by correction of coronal deformity. METHOD: Patients aged between 10 to 20 years who suffered from Lenke type 1 idiopathic scoliosis with Cobb angles more than 45° and underwent posterior spinal fusion were prospectively included. Scoliosis Cobb angles and apical vertebral rotations in standing, supine and fulcrum bending positions before surgery, and in supine position after surgery, were measured on x-rays and CT scans. They were compared using paired t-test. RESULTS: Eighteen patients were included. The mean age at surgery was 15.5yr. The Cobb angles and apical vertebral rotations in standing, supine and fulcrum bending positions before surgery and in supine position after surgery were 54°,26°; 40°,19° ; 17°,10°; and 14°,8° respectively. The differences in Cobb angles and apical vertebral rotation between standing, supine and fulcrum bending positions were statistically significant. The differences in Cobb angle and apical vertebral rotation between fulcrum bending position and postoperation were statistically insignificant. DISCUSSION AND CONCLUSION: Our study demonstrated that spontaneous apical derotation occurred concomittently with correction of the coronal deformity. The amount of vertebral derotation achievable under fulcrum bending may predict the post-operative vertebral rotation correction. Apical rotation was corrected by 27% on supine and 62% on fulcrum bending positions. Such spontaneous derotation effect should be considered when assessing the effects with different implants and surgical strategies.-
dc.languageengen_US
dc.relation.ispartofSICOT/SIROT Annual International Conferenceen_US
dc.titleHow much apical derotation occurs as a result of coronal curve correction in AIS assessment using the fulcrum bending radiographen_US
dc.typeConference_Paperen_US
dc.identifier.emailLuk, KDK: hcm21000@hku.hken_US
dc.identifier.emailCheung, WY: lcheung@hkucc.hku.hken_US
dc.identifier.emailCheung, KMC: cheungmc@hku.hken_US
dc.identifier.emailWong, YW: yatwa@hkucc.hku.hken_US
dc.identifier.authorityLuk, KDK=rp00333en_US
dc.identifier.hkuros197027en_US
dc.description.otherThe 7th SICOT/SIROT Annual International Conference combined meeting with the Swedish Orthopaedic Association (SOF), Gothenburg, Sweden, 31 August-3 September 2010.-

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