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  • Journal of Neurosurgery: Spine x
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Satoshi Tani, Hiroyasu Nagashima, Akira Isoshima, Masahiko Akiyama, Hiroki Ohashi, Satoru Tochigi and Toshiaki Abe

N o devices commercially available have a potent distraction action of the disc space during ACDF. To perform interbody distraction and to obtain spine curvature correction during ACDF, in 2006 we adopted a new stand-alone device, a DFDD (Kisco DIR Co.) ( Fig. 1 ). In this preliminary report we discuss short-term clinical and radiological results associated with the DFDD's positive benefit on the disc space. F ig . 1. Photographs showing the configurations of the DFDD: anterior (a) , posterior (b) , lateral (c) , superior (d) views. Methods

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Tsutomu Ohnishi, Masashi Neo, Mutsumi Matsushita, Masashi Komeda, Tadaaki Koyama and Takashi Nakamura

since then, perhaps because the surgical techniques and implant designs have been improved. We report the case of delayed aortic rupture caused by an SRK device (AcroMed, Raynham, MA). The complication in the present case differs from those described in previous reports in that it was caused by a refined anterior spinal instrument and that it occurred after a much longer time (20 months postoperatively). Case Report History This 53-year-old man fell from a roof on May 1, 1998; he suffered severe back pain, progressive bilateral sensory disturbance, and

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Ronald H. M. A. Bartels

Object Interspinous process decompression (IPD) theoretically relieves narrowing of the spinal canal and neural foramen in extension and thus reduces the symptoms of neurogenic intermittent claudication (NIC). The purpose of this study was to compare the efficacy of IPD with nonoperative treatment in patients with NIC secondary to degenerative spondylolisthesis. Methods The authors conducted a randomized controlled study in patients with NIC; they compared the results obtained in patients treated with the X STOP IPD device with those acquired in

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Masahiro Kanayama, Bryan W. Cunningham, Charles J. Haggerty, Kuniyoshi Abumi, Kiyoshi Kaneda and Paul C. McAfee

collapse or dislodgment of the donor bone. 8, 13, 15 As a key to reduce or eliminate these complications, interbody fusion implants have recently been gaining acceptance as a method for ensuring lumbar interbody arthrodesis. Interbody fusion devices provide anterior structural support of the operative segment and eliminate the need for harvesting tricortical bone block from the iliac crest. Recently, various types of interbody fusion devices have been developed and have produced successful clinical outcomes. 1, 12, 14, 18 To our knowledge, however, few comparative

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Masashi Neo, Mutsumi Matsushita, Tadashi Yasuda, Takeshi Sakamoto and Takashi Nakamura

posteromedial direction to the vertebral groove. 10 Therefore, we designed an aiming device that enables us to insert a guide wire along this course. In the present study, we successfully used this device and a flexible screw-inserting system in 10 patients. Clinical Material and Methods The Device The instruments consist of a specially designed aiming device ( Fig. 1 upper left and right ) and the Reunion Bone Screw System (Surgical Dynamics Inc., Norwalk, CT). The latter is composed of guide wires, a flexible cannulated drill, a tap, a hex screwdriver, and

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Federica Anasetti, Fabio Galbusera, Hadi N. Aziz, Chiara M. Bellini, Alessandro Addis, Tomaso Villa, Marco Teli, Alessio Lovi and Marco Brayda-Bruno

Interspinous devices are widely used in Europe for the treatment of lumbar stenosis. The purposes of these devices are to provide some stabilization after decompression, to restore foraminal height, and to unload the facet joints. 22 They allow for the preservation of a ROM in the implanted segment, thus avoiding or limiting possible overloading and early degeneration of the adjacent segments as induced by fusion, 10 as confirmed in a previous FE study. 3 The DIAM spinal stabilization system (Medtronic, Ltd.) is an interspinous implant made of silicone, covered with a

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Jee Soo Jang, Won Bok Lee and Hansen A. Yuan

I n terms of providing stability transpedicular screw fixation has been identified as a superior method compared with that conferred by anterior instrumentation and posterior hook/rod devices when used in an unstable spine. 1, 7 Several investigators have studied and characterized the anatomical measurements of the thoracic vertebrae to assess possibilities for proper screw insertion into the pedicle with minimal complications. 2–5, 11–16, 18 Pedicle screw insertion in the thoracic spine is a technically challenging procedure because of the small pedicle

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Chien-Jen Hsu, Yi-Wen Chang, Wen-Ying Chou, Chou-Ping Chiou, Wei-Ning Chang and Chi-Yin Wong

measure the ROM in healthy adults using an electromagnetic tracking device. We also analyze the relative contribution of the thoracic spine, the lumbar spine, and the hip to trunk movements. Clinical Material and Methods Mathematical Model A 3D kinematic trunk model with an electromagnetic tracking device was developed for this study. The functional segments of the cervical, thoracic, and lumbar spine and the hip were defined. There were 4 coordinate systems, including 1 for the thoracic spine, lumbar spine, hip, and thigh. Because the standing position was

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Jee Soo Jang, Sang Ho Lee and Sang Rak Lim

T he authors of several biomechanical studies have demonstrated that anterior cage-assisted stabilization alone does not ensure solid fixation especially in extension and axial rotation. 2, 8, 9 Supplementary posterior fixation, such as that provided by translaminar or pedicle screws after ALIF, is needed for solid fixation. We introduce a new, minimally invasive procedure for the percutaneous insertion of PTFSs following ALIF in which a specially designed guide device is used. The object of this study was to evaluate the accuracy and efficacy of this method

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Paul A. Anderson, Cliff B. Tribus and Scott H. Kitchel

significant improvement in symptom severity and physical function in 58 and 55% of patients, respectively. Furthermore, 71% of the patients were satisfied with the treatment. In a biomechanical study in cadaveric spines, Richards, et al., 25 found that the X STOP IPD device significantly increased the canal area by 18%, the canal diameter by 10%, the foraminal area by 25%, and the foraminal width by 41%. We hypothesized that the X STOP IPD device would improve function in patients with NIC due to spinal stenosis and degenerative spondylolisthesis. The purpose of this