Journal List > J Korean Soc Spine Surg > v.15(3) > 1035805

Park, Shim, and Yang: Anterior Decompression and Fusion in the Treatment of Single-level Cervical Disc Herniation - Plate Fixation vs Cage -

Abstract

Study Design

This is a retrospective study.

Objectives

We analyzed the radiological and clinical results to verify the efficacy of anterior interbody fusion with using cages gradually increases in the treatment of cervical radiculopathy.

Summary of the Literature Review

Anterior cervical decompression and fusion is well accepted treatments for cervical radiculopathy. Performing anterior interbody fusion using cages has recently gradually increased to minimize the extent of surgery. While there are numerous reports on the primary stabilizing effects of the cervical cages, little is known about the subsidence behavior of such cages in vivo.

Materials and Methods

We retrospectively analyzed 38 patients with cervical disc herniation who underwent anterior decompression and interbody fusion with autoiliac bone graft and plate fixation (Group I, 21 patients) or who underwent with standalone cage (Group II, 17 patients). We statistically analyzed the changes of the cervical lordosis, the segmental lordosis, the vertebral body height, the fusion rate on the plain x-ray and the clinical results with using a pain visual analogue scale.

Results

All the cases were fused by 11.2±2.7 weeks after operation. The changes of the cervical lordosis and segmental lordosis show no statistically significant difference between the two groups (p=0.07, 0.66). The anterior and posterior vertebral heights of the fused segments of group II were more decreased than those of group I, but there was no statistically difference between the two groups (p=0.06, 0.30). The clinical results were not statistically difference between the two groups (p=0.64, 0.45).

Conclusions

Implantation of autoiliac cancellous bone impacted standalone cages or on a tricortical iliac crest autograft after anterior decompression was safe and reliable options for the treatment of cervical disc herniation that causes single level radiculopathy. Both procedures produced equally satisfying clinical and radiological results, leading to a high fusion rate and they maintained the intervertebral height.

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Fig. 1.
36-years-old female with cervical disc herniation on C3-4. (A) Preoperative lateral roentgenogram. (B)Lateral radiograph, immediately after surgery, shows anterior cervical fusion with autogenous iliac bone and cervical locking plate. (C) Lateral radiograph, 6years after surgery, shows the solid union of grafted bone. (D) Lateral roentgenogram of flexion/extention view that shows no motion at fused level. (E) Sagittal MRI, 6years after surgery, shows the solid union at fused level.
jkss-15-140f1.tif
Fig. 2.
43-years-old female with cervical disc herniation on C4-5. (A) Preoperative lateral roentgenogram. (B), (C) T1 weighted sagittal and axial MRI image show a C4-5 disc herniation. (D) Lateral radiograph, immediately after surgery, show anterior cervical fusion with Solis PEEK cage that packed with cancellous iliac bone. (E) Lateral radiograph, 16 months after surgery, shows the solid union at fused level but disc height is decreased slightly than after surgery.
jkss-15-140f2.tif
Fig. 3.
Radiograph showing linear and angular measurement.
jkss-15-140f3.tif
Table 1.
Demography of sampling errors
    Plate group (n=21) Cage group (n=17) P-value
Age (years)   46.4±5.2 47.2±6.8 0.833
Sex (M/F)   12/9 10/7 0.498
Smoking   6 5 0.531
Follow-up (months)   16.4±5.6 15.9±1.9 0.273
  C4-5 5 4  
Fusion level C5-6 11 9 0.841
  C6-7 5 4  
Table 2.
Radiological comparison between two groups
    Plate group (n=21) Cage group (n=17) P-value
Lordotic angle (®) Preoperation 13.7±7.4 12.5±8.0 0.658
  Postoperation 8.5±5.3 11.9±6.4 0.090
  Last Follow-up 12.6±4.7 12.7±6.4 0.935
  Δ(Last f/u-Post op) 4.1±5.4 0.9±4.7 0.073
Disc angle (®) Preoperation 3.2±2.7 4.1±3.3 0.344
  Postoperation 5.8±4.3 4.2±3.1 0.256
  Last Follow-up 3.6±2.9 2.7±3.6 0.384
  Δ(Last f/u-Post op) -2.1±3.8 -1.6±3.8 0.658
Anterior body height (ABH, %) Preoperation 259.6±61.2 234.5±47.8 0.221
  Postoperation 284.9±59.9 256.8±48.9 0.148
  Last Follow-up 277.2±55.9 236.9±36.6 0.022
  Δ(Last f/u-Post op)® -2.3±8.0 -7.1±6.4 0.064
Posterior body height (PBH∗, %) Preoperation 260.9±62.5 231.6±48.4 0.143
  Postoperation 275.0±57.6 247.4±44.3 0.134
  Last Follow-up 270.4±56.7 235.5±37.5 0.048
  Δ(Last f/u-Post op)® -1.3±9.2 -4.4±7.0 0.297

ABH= Anteriorvertebral height (A) ×100, Control height (C)

® Δ(LastF/U-Post op.) ABH (%) = Last F/U ABH-Post op ABH ×100, Post op. ABH Δ(LastF/U-Post op.) PBH (%) = Last F/U PBH-Post op PBH ×100 Post op. PBH ∗PBH= Posteriorvertebral height (P) ×100 Control height (C)

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