RESUMEN
[Objective]To explore the feasibility and effect of modified minimally invasive percutaneous pedicle screws osteosynthesis for the treatment of thoraco-lumbar vertebra compression fracture.[Method]Twelve cases of thoraco-lumbar fracture without neural impairment were enrolled who did not need laminotomy decompression from June 2005 to June 2007.With the help of C-arm image intensifier,the pedicle screws were inserted through four small longitudinal incisions(1-1.5 cm)and modified surgical instruments.Perioperative parameter,postoperative imaging index,visual analog scale(VAS)and Oswestry Disability Index(ODI)were compared with the treatment of conventional open pedicle screws osteosynthesis in other 18 cases.[Result]All cases were followed up from 8 to 25 months(mean 13.2 months).The operation time and length of stay in minimal invasive group were significantly shorter than that in conventional group,the amount of operative bleeding and drainage of postoperation decreased obviously(P