Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Spine
Abstract number: 24358
OSTEOPOROTIC VERTEBRAL FRACTURE FOLLOWING INSTRUMENTED
ARTHRODESIS FOR DEGENERATIVE LUMBAR DISORDERS
Yongsoo CHOI, Woojong KOOK, Kwanwoo KIM
Kwangju Christian Hospital, Gwangju (KOREA)
The objective is to investigate the influence of instrumented lumbar arthrodesis on
the osteoporotic vertebral fracture. 25 patients with thoracolumbar vertebral fracture
following instrumented arthrodesis for degenerative lumbar disorders (study group)
were investigated. The bone mineral density (BMD) of the femoral neck in the study
group was compared with that of 28 patients (control group) who undergone simple
osteoporotic vertebral fracture. The fracture following instrumented arthrodesis is
diagnosed after mean 47(7~100) months. Clinically diagnosed vertebral fracture was
associated with slip down in 16 cases and aggravation of back pain without trauma in
19 cases. There is a relatively better BMD in study group, 0.67±0.12g/cm2 as
compared to control group, 0.60±0.13g/cm2 (p=0.013). VAS of back pain have
improved from a mean of 7.5±1.0 at the time of fracture to a mean of 4.9±2.0 at 1
year after the fracture (p=0.001). But 12 (48%) patients complained of severe back
pain at 1 year after the fracture on comparison of the pre-fracture state. There was
negative correlation between the BMD and the back pain at the last follow up (R= -
0.455, p=0.022). Lumbar instrumented arthrodesis is a risk factor of osteoporotic
vertebral fracture. The osteoporotic vertebral fracture following instrumented
arthrodesis contributes to aggravation of the back pain in addition to final outcome of
degenerative lumbar disorders.
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