Case series [Neurosurgery Wiki]

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====Case series====

Few studies have reported direct comparative data of [[lumbar spine]] angles between [[direct lateral interbody fusion]] ([[DLIF]]) and [[oblique lateral interbody fusion]] ([[OLIF]]). The purpose of the study of Ko et al., was to investigate the clinical and radiological [[outcome]]s of DLIF and OLIF, and determine influential factors.

The same surgeon performed DLIF from May 2011 to August 2014 (n=201) and OLIF from September 2014 to September 2016 (n=142). Radiological parameters, [[cage height]], [[cage angle]] (CA), [[cage width]] (CW), and [[cage location]] were assessed. They checked the cage location as the distance (mm) from the anterior margin of the [[disc space]] to the anterior [[metallic indicator]] of the cage in lateral images.

There were significant differences in [[intervertebral foramen height]] (FH; 22.0±2.4 vs. 21.0±2.1 mm, p<0.001) and [[sagittal disc angle]] (SDA; 8.7±3.3 vs. 11.3±3.2˚, p<0.001) between the DLIF and OLIF groups at 7 days [[postoperative]]ly. CA (9.6±3.0 vs. 8.1±2.9˚, p<0.001) and CW (21.2±1.6 vs. 19.2±1.9 mm, p<0.001) were significantly larger in the OLIF group compared to the DLIF group. The cage location of the OLIF group was significantly more anterior than the DLIF group (6.7±3.0 vs. 9.1±3.6 mm, p<0.001). [[Cage subsidence]] at 1 year postoperatively was significantly worse in the DLIF group compared to the OLIF group (1.0±1.5 vs. 0.4±1.1 mm, p=0.001). Cage location was significantly correlated with postoperative FH (β=0.273, p<0.001) and postoperative SDA (β=-0.358, p<0.001). CA was significantly correlated with postoperative FH (β=-0.139, p=0.044) and postoperative SDA (β=0.236, p=0.001). Cage location (β=0.293, p<0.001) and CW (β=-0.225, p<0.001) were significantly correlated with cage subsidence.

The cage location, CA, and CW seem to be important factors which result in the different-radiological outcomes between DLIF and OLIF
((Ko MJ, Park SW, Kim YB. Effect of Cage in Radiological Differences between
Direct and Oblique Lateral Interbody Fusion Techniques. J Korean Neurosurg Soc.
2019 May 8. doi: 10.3340/jkns.2018.0142. [Epub ahead of print] PubMed PMID:
31064045.
)).