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Article: Variation in bone mineral density of the sacrum in young adults and its significance for sacral fixation

TitleVariation in bone mineral density of the sacrum in young adults and its significance for sacral fixation
Authors
Issue Date2000
PublisherLippincott, Williams & Wilkins. The Journal's web site is located at http://www.spinejournal.com
Citation
Spine, 2000, v. 25 n. 3, p. 353-357 How to Cite?
AbstractStudy Design. Bone mineral density variations throughout the sacrum were measured and correlated with sacral screw insertion torque. Objective. To quantify bone mineral density variations within the S1 body and ala of young human specimens, especially along the pathways of sacral screws, and to examine the relation between sacral screw fixation and bone mineral density. Summary of Background Data. Vertebral bone quality is an essential factor in anterior or posterior screw fixation of the spine. Several studies have been conducted regarding bone mineral density variations in the cervical and thoracolumbar spine. However, such variations in bone mineral density in the sacrum have not been well documented. Methods. The bone mineral density of 13 sacral specimens from young male cadavers (mean age, 31 years) was measured using highly accurate quantitative computed tomography. Variations in bone mineral density were measured in five transverse layers and seven vertical columns within the S1 body, and in four transverse layers and six vertical columns within the ala. The sacral screw insertion torque was measured (unicortical and bicortical), and the correlation with bone mineral density was calculated. Results. The mean bone mineral density of the S1 body was 381.9 ± 59 mg/cm3, which was 31.9% higher than that of the sacral ala (mean, 296.9 ± 86 mg/cm3) (P<0.05). Bone mineral density of the superior sacral end-plate was higher than that of any other transverse layer. Columns near the lateral posterior and lateral anterior of the S1 body had the highest bone mineral density. In the ala, bone mineral density values of the internal columns (pedicle) were the highest. Screw insertion torque for bicortical purchase along the S1 pedicle correlated well with the bone mineral density of the S1 body (r = 0.67, P<0.05). Conclusion. This study quantified the volumetric bone mineral density variations within the S1 body and ala, and a significant linear correlation between the screw insertion torque and bone mineral density was found. Optimal sacral screw insertion pathways were also outlined based on bone mineral density values.
Persistent Identifierhttp://hdl.handle.net/10722/79574
ISSN
2015 Impact Factor: 2.439
2015 SCImago Journal Rankings: 1.459
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZheng, Yen_HK
dc.contributor.authorLu, WWen_HK
dc.contributor.authorZhu, Qen_HK
dc.contributor.authorQin, Len_HK
dc.contributor.authorZhong, Sen_HK
dc.contributor.authorLeong, JCYen_HK
dc.date.accessioned2010-09-06T07:56:12Z-
dc.date.available2010-09-06T07:56:12Z-
dc.date.issued2000en_HK
dc.identifier.citationSpine, 2000, v. 25 n. 3, p. 353-357en_HK
dc.identifier.issn0362-2436en_HK
dc.identifier.urihttp://hdl.handle.net/10722/79574-
dc.description.abstractStudy Design. Bone mineral density variations throughout the sacrum were measured and correlated with sacral screw insertion torque. Objective. To quantify bone mineral density variations within the S1 body and ala of young human specimens, especially along the pathways of sacral screws, and to examine the relation between sacral screw fixation and bone mineral density. Summary of Background Data. Vertebral bone quality is an essential factor in anterior or posterior screw fixation of the spine. Several studies have been conducted regarding bone mineral density variations in the cervical and thoracolumbar spine. However, such variations in bone mineral density in the sacrum have not been well documented. Methods. The bone mineral density of 13 sacral specimens from young male cadavers (mean age, 31 years) was measured using highly accurate quantitative computed tomography. Variations in bone mineral density were measured in five transverse layers and seven vertical columns within the S1 body, and in four transverse layers and six vertical columns within the ala. The sacral screw insertion torque was measured (unicortical and bicortical), and the correlation with bone mineral density was calculated. Results. The mean bone mineral density of the S1 body was 381.9 ± 59 mg/cm3, which was 31.9% higher than that of the sacral ala (mean, 296.9 ± 86 mg/cm3) (P<0.05). Bone mineral density of the superior sacral end-plate was higher than that of any other transverse layer. Columns near the lateral posterior and lateral anterior of the S1 body had the highest bone mineral density. In the ala, bone mineral density values of the internal columns (pedicle) were the highest. Screw insertion torque for bicortical purchase along the S1 pedicle correlated well with the bone mineral density of the S1 body (r = 0.67, P<0.05). Conclusion. This study quantified the volumetric bone mineral density variations within the S1 body and ala, and a significant linear correlation between the screw insertion torque and bone mineral density was found. Optimal sacral screw insertion pathways were also outlined based on bone mineral density values.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.subject.meshAdulten_HK
dc.subject.meshBone Densityen_HK
dc.subject.meshBone Screwsen_HK
dc.subject.meshHumansen_HK
dc.subject.meshMaleen_HK
dc.subject.meshSacrum - chemistry - surgeryen_HK
dc.subject.meshSpinal Fusionen_HK
dc.subject.meshTorqueen_HK
dc.titleVariation in bone mineral density of the sacrum in young adults and its significance for sacral fixationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0887-9869&volume=25&issue=3&spage=353&epage=357&date=2000&atitle=Variation+in+bone+mineral+density+of+the+sacrum+in+young+adults+and+its+significance+for+sacral+fixationen_HK
dc.identifier.emailLu, WW:wwlu@hku.hken_HK
dc.identifier.authorityLu, WW=rp00411en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1097/00007632-200002010-00016en_HK
dc.identifier.pmid10703109-
dc.identifier.scopuseid_2-s2.0-0033951314en_HK
dc.identifier.hkuros52150en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0033951314&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume25en_HK
dc.identifier.issue3en_HK
dc.identifier.spage353en_HK
dc.identifier.epage357en_HK
dc.identifier.isiWOS:000085275100017-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZheng, Y=7404836971en_HK
dc.identifier.scopusauthoridLu, WW=7404215221en_HK
dc.identifier.scopusauthoridZhu, Q=7403313141en_HK
dc.identifier.scopusauthoridQin, L=24449633900en_HK
dc.identifier.scopusauthoridZhong, S=8243008000en_HK
dc.identifier.scopusauthoridLeong, JCY=35560782200en_HK

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