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. 2013 Dec;10(4):232-6.
doi: 10.14245/kjs.2013.10.4.232. Epub 2013 Dec 31.

Slip Reduction Rate between Minimal Invasive and Conventional Unilateral Transforaminal Interbody Fusion in Patients with Low-Grade Isthmic Spondylolisthesis

Chang Hyun Oh  1 , Gyu Yeul Ji  2 , Jae Kyun Jeon  1 , Junho Lee  1 , Seung Hwan Yoon  3 , Dong Keun Hyun  3
Affiliations

Slip Reduction Rate between Minimal Invasive and Conventional Unilateral Transforaminal Interbody Fusion in Patients with Low-Grade Isthmic Spondylolisthesis

Chang Hyun Oh et al. Korean J Spine. 2013 Dec.

Abstract

Objective: To compare the slip reduction rate and clinical outcomes between unilateral conventional transforaminal lumbar interbody fusion (conventional TLIF) and unilateral minimal invasive TLIF (minimal TLIF) with pedicle screw fixation for treatment of one level low-grade symptomatic isthmic spondylolisthesis.

Methods: Between February 2008 and April 2012, 25 patients with low-grade isthmic spondylolisthesis underwent conventional TLIF (12 patients) and minimal TLIF (13 patients) in single university hospital by a single surgeon. Lateral radiographs of lumbar spine were taken 12 months after surgery to analyze the degree of slip reduction and the clinical outcome. All measurements were performed by a single observer.

Results: The demographic data between conventional TLIF and minimal TLIF were not different. Slip percentage was reduced from 15.00% to 8.33% in conventional TLIF, and from 14.15% to 9.62% in minimal TLIF. In both groups, slip percentage was significantly improved postoperatively (p=0.002), but no significant intergroup differences of slip percentage in preoperative and postoperative were found. The reduction rate also not different between conventional TLIF (45.41±28.80%) and minimal TLIF (32.91±32.12%, p=0.318).

Conclusion: Conventional TLIF and minimal TLIF with pedicle screw fixation showed good slip reduction in patients with one level low-grade symptomatic isthmic spondylolisthesis. The slip percentage and reduction rate were similar in the conventional TLIF and minimal TLIF.

Keywords: Conventional; Minimal invasive; Reduction rate; Slip percentage; Transforamenal lumbar interbody fusion.

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Figures

Fig. 1
Fig. 1
Slip percentage measured by a percentage of distance from the posterior border of the caudal to the posterior border of the rostral vertebra: slip percentage was decreased from 26.7% to 17.9% in conventional TLIF (A and B) and was decreased from 27.6% to 21.8% in minimal TLIF (C and D)
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