Abstract：
:Posterior short-segment instrumentation for thoracolumbar burst fracture is known for a high implant failure rate because of the lack of anterior support. Anterior body augmentation by transpedicular bone grafting has been developed as an alternative to overcome this failure. However, the efficacy of transpedicular bone grafting remains debatable. Between August 2002 and August 2006, 31 patients with a single-level thoracolumbar fracture underwent insertion of posterior short-segment pedicle screws and transpedicular bone grafting. Twenty-one men and 10 women had a mean age of 39.7 years at the time of surgery. All patients were followed up for at least 2 years; the mean follow-up period was 52.7 months. Preoperative computed tomography showed that the mean canal encroachment was 48.1%. The kyphotic angle improved from 20.9 degrees to 3.7 degrees immediately postoperatively. Loss of kyphosis correction was 2.7 degrees before implant removal and 6.2 degrees at final follow-up. The anterior body height was corrected from 50.9% to 86.9% by surgery, but collapsed to 82.2% before implant removal and became 78.1% at final follow-up. The failure of the surgery was defined as an increase of >10 degrees in local kyphosis and/or implant breakage. At last follow-up, no implants had failed, but 3 patients had a loss of correction >10 degrees ; the failure rate was 9.7%. According to the Dennis functional scales, the mean pain score was 1.7, and the mean work score was 2.2 at final follow-up. All 8 patients with partial neurological deficit initially had improvement. Analysis of the results indicated that this technique effectively corrects deformities, restores vertebral height, prevents early implant failure, and provides satisfactory clinical results.
journal_name
Orthopedicsjournal_title
Orthopedicsauthors
Liao JC,Fan KF,Chen WJ,Chen LH,Kao HKdoi
10.3928/01477447-20090527-11subject
Has Abstractpub_date
2009-07-01 00:00:00pages
493issue
7eissn
0147-7447issn
1938-2367pii
orthopedics.41032journal_volume
32pub_type
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