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Vet Comp Orthop Traumatol 2008; 21(04): 382-384
DOI: 10.3415/VCOT-07-01-0003
Brief Communication
Schattauer GmbH

Lumbar interbody expanding cage

A preliminary study on an animal model
M. L. Manunta
1   Department of Surgery, School of Veterinary Medicine
,
G. M. Careddu
1   Department of Surgery, School of Veterinary Medicine
,
G. Masala
1   Department of Surgery, School of Veterinary Medicine
,
N. Columbano
1   Department of Surgery, School of Veterinary Medicine
,
C. Doria
3   San Francesco Hospital, Nuoro, Italy
,
L. Crissantu
3   San Francesco Hospital, Nuoro, Italy
,
E. Sanna Passino
1   Department of Surgery, School of Veterinary Medicine
› Author Affiliations
Further Information

Publication History

Received: 04 January 2007

Accepted 17 February 2007

Publication Date:
19 December 2017 (online)

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Summary

Interbody fusion devices are used in human medicine for treating degenerative diseases of the spine. Currently, there is not a universally accepted assessment tool for determining fusion, and the definitive criteria for diagnosing a successful interbody fusion remain controversial. The aim of this study was to describe microscopic and helical computed tomography (CT) imaging in the assessment of lumbar interbody fusion using cylindrical threaded titanium expanding cage in sheep. One cylindrical threaded expanding titanium cage (Proconcept – SA, Orange, France) was inserted through a transperitoneal approach after radical discectomy and packed with cancellous bone autograft in five adult sheep. The subjects were euthanatized after three, six, 12, 18 and 24 months. CT images revealed lumbar fusion at 12 months post operation, whereas microscopic evaluations indicated the presence of lumbar fusion at 18 months. CT and histological grades were the same in 65% of the cases observed. There were not a significant difference between CT, histological and micro radiographic grades. Helical CT scanning can be considered to be a suitable method for the monitoring of lumbar fusion as it enables observation of the deposition of bony bridging within the cage.

Keywords

Threaded expanding cage - lumbar spine - vertebral fusion - arthrodesis - animal model
 

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