Complications associated with pedicle screws.

摘要: Background: The safety and the effectiveness of pedicle-screw instrumentation in spine have been questioned despite its use worldwide to enhance stabilization spine. This review was performed answer questions about technique insertion nature etiology complications directly attributable screws. Methods: We a retrospective all procedures that were done by us from January 1, 1984, December 31, 1993. inserted 4790 screws during 915 operative on 875 patients; 668 (76.3 percent) patients had lumbosacral arthrodesis. mean duration follow-up three years (range, two five years). accuracy screw placement assessed intraoperative, immediate postoperative, radiographs with developed one (F. D.); this has yet be validated determine prevalence various types error. Results: Of screws, 4548 (94.9 within pedicle vertebral body. One hundred thirty-four (2.8 perforated anterior cortex, most common type perforation. fifteen (2.4 associated could ascribed problem late-onset discomfort or pain related pseudarthrosis perhaps screws; 1102 (23.0 used 222 (24.3 procedures. symptoms necessitated removal without repair pseudarthrosis. A found forty-six (20.7 Irritation nerve root occurred after nine (1.0 caused eleven (0.2 percent); it more commonly medially placed Three residual neurological weakness Twenty-five (0.5 percent), twenty (2.2 broke. broke an early design. thirteen who broken Sixteen exploration; them solid fusion, remaining four evidence fusion no pain. Conclusions: There are few problems provided surgeon is experienced adheres principles details technique. Our revealed low rate postoperative may implants stiffness construct; however, difficult accurately identify exact etiology.