Pedicle screw instrumentation constructs have become a cornerstone in the treatment of adult spinal deformity and instability. They are known to provide greater rigidity and enhanced ability to correct and maintain spinal alignment. Biomechanical data, however, demonstrate that increased construct stiffness is associated with increased loading within adjacent segments [1– 9]. Increasingly stiff...

PURPOSE OF THE STUDY Decompression surgery with or without fusion is the gold standard treatment of lumbar spinal stenosis, but adjacent segment degeneration has been reported as a long-term complication after fusion. This led to the development of dynamic implants like the interspinous devices. They are supposed to limit extension and expand the spinal canal at the symptomatic level, but with ...

BACKGROUND There were higher numbers of tertiary blast injuries from terrorist bombing in southern Thailand. There was no previous report about spinal trauma in tertiary blast injury. MATERIAL AND METHOD Between January 2007 and December 2007, there were 100 Thai military personnel injured in combat and 18 cases were classified to tertiary blast injury (type III). Six patients with spine and ...

PURPOSE Standard thoracotomy for anterior instrumentation and fusion of the thoracic spine in idiopathic scoliosis may have detrimental effects on pulmonary function. In this study we describe a less invasive anterior surgical technique and show the pre- and postoperative pulmonary function with a minimum follow-up of 2 years. METHODS Twenty patients with Lenke type 1 adolescent thoracic idio...

BACKGROUND CONTEXT Spinal implants are occasionally removed due to infection or soft tissue irritation secondary to prominence. Several studies have reported loss of scoliotic curve correction after implant removal. However, further review of the literature reveals no similar cases of rapid curve progression following implant removal in patients with adolescent idiopathic scoliosis (AIS) necess...

BACKGROUND The use of intrasacral rods has been previously reported for posterior lumbosacral fixation. However, problems associated with this technique include poor stability of the rod in the sacrum, difficulty in contouring the rod to fit the lateral sacral mass, and the complicated assembly procedure for the rod and pedicle screws in the thoracolumbar segments after insertion of the rod int...

there have been a number of developments in screw design and implantation techniques over recent years, including proposal of an alternative trajectory entitled as cortical bone trajectory (cbt). cortical bone trajectory has been investigated in recent medical treatments as an alternative for screw fixation aimed at increasing purchase of pedicle screws in higher density bone. cbt screw inserti...

IntroductionNumerous studies have sought to quantify the biomechanical effects of posterior spinal fusion and disc arthroplasty; however, the results from these studies are conflicting. Additionally, the variety of techniques utilized during biomechanical testing complicates comparing results of instrumentation studies. Two distinct methods of experimental loading protocols have emerged to test...

OBJECT The authors undertook a retrospective single-institution review of 261 patients who underwent anterior cervical corpectomy, reconstruction with allograft fibula, and placement of an anterior plating system for the treatment of cervical spinal stenosis to assess fusion rates and procedure-related complications. METHODS Between October 1989 and June 1995, 261 patients with cervical steno...