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KMID : 1001920040350050483
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Journal of Korean Neurosurgical Society
2004 Volume.35 No. 5 p.483 ~ p.486
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Effect of PDN^(®) (Prosthetic Disc Nucleus) on the Mobility and Height of thelntervertebral Disc
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Lee Sang-Ho
Kim Dong-Yun
Sim Chan-Shic
Choi Won-Chul
Choi Gun
Lee Ho-Yeon
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Abstract
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Objective : The purpose of the current study is to investigate the effect of the prosthetic disc nucleus replacement on the mobility and height of the intervertebral disc and adjacent segments.
Methods : Thirteen patients who underwent L4-L5 prosthetic disc nucleus replacement were included in this study. A retrospective review of clinical and radiological data was conducted. The L4-L5 disc height and sagittal rotation angle of 1-3-1-4, 1-4-1-5, L5-S1 were measured in the static and dynamic lateral radiographs pre- and postoperatively.
Results : There were seven men and six women whose mean age was 37 years (range, 24-49 years). The mean follow-up period was nine months (range, 6-14 months). In all cases the L4-1-5 motion segment demonstrated angular motion between flexion and extension with a mean of 4(2.3) of sagittal rotation angle. The disc height increased from preoperative levels by 117%. There was no difference in angular motion of adjacent segments between pre- and postoperative data.
Conclusion : The prosthetic disc nucleus replacement after discectomy is shown to restore the disc height and maintain segmental mobility.
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KEYWORD
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Lumbar spine, Degenerative disc disease, Prosthetic disc nucleus
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