Lightning Podiums: Cervical Degenerative - Room 802A

Presented by: J.-M. Jung

Author(s):

J.-M. Jung(1), T.-A. Jahng(2), K.-J. Kim(1), S.-J. Hyun(3)

(1) Seoul National University Hospital, Seoul, Korea, Republic of
(2) Seoul National University College of Medicine, Neurological Surgery, Jongno-Gu, Seoul, Korea, Republic of
(3) Seoul National University College of Medicine, Bundang Hospital, Neurosurgery, Seongnam, Korea, Republic of

Abstract

Background: Open-door and double-door laminoplasty (ODL and DDL, respectively) have been widely used for the treatment of CSM or OPLL. However, the comparison of post-operative spinal canal expansion between the two techniques relative to the pre-operative lamina angle has not been investigated.

Objective: The purpose of this study was to compare the increase in SCD and SCA according to PLA using simulation model between ODL and DDL.

Methods: The GeoGebra software was used to simulate ODL and DDL. The validation of the simulation model was analyzed by comparing the clinical data and simulation results of the 64 patients who had undergone C3-C6 laminoplasty (43 patients with ODL and 21 patients with DDL). ODL and DDL were simulated to compare the increase in SCD and SCA according to PLA using the anatomic data of patients who actually underwent surgery.

Results: A comparison of the data obtained by clinical investigation and simulation showed no significant difference (p > 0.05) and a very high degree of correlation (p < 0.001). The increase in SCD gradually increased following ODL and DDL with increasing LOS in the same PLA. However, when the PLA increased from 28° to 32° in the same LOS, the increase in SCD after ODL and DDL decreased steadily. When the PLA increased from 28° to 32° in the same LOS, increase in SCA after ODL was constant and the increase in SCA after DDL decreased. The increase of SCA after ODL and DDL showed no significant difference (p < 0.05) regardless of LOS or PLA.

Conclusion: There is no significant difference in the increase in SCA after ODL and DDL regardless of LOS size when the PLA is between 28° and 32° (p > 0.05).