STUDY DESIGN Prospective clinical study with postoperative radiologic control of pedicle screw placement in the cervical spine. OBJECTIVES To evaluate whether cervical pedicle screws can be placed safely in a conventional technique when using cannulated screws and separate stab incisions. Also, to evaluate if accuracy and safety of pedicle screw placement can be improved using a computer-assi...

OBJECTIVE We wanted to analyze the factors affecting the results of multiple cannulated screws fixation in patients less than 60 years old with femoral neck fracture (FNF). METHODS We reviewed 52 patients (30 males, 22 females) who were treated with multiple cannulated screws fixation for FNFs. They were followed up for more than one year during January 2002 to December 2012. They were classi...

INTRODUCTION Early-stage pullout is a common problem for surgeons during the fixation of osteoporotic bones. Poor bone quality limits the use of pedicle screws for patients with osteoporosis. In this study, the researchers investigated the effects of hole and gap position and type on the pullout strength of cannulated screws. METHODS Seven different designs were tested, including a control gr...

The purpose of this study was to determine the change of fixation strength after adjusting the height of polymethylmethacrylate (PMMA)-augmented pedicle screws.Cement-augmented cannulated pedicle screws with or without PMMA augmentation with a radial hole in the distal third of the screw thread were inserted into synthetic bone blocks used to model osteoporosis. Screws were left unchanged (in s...

PURPOSE To review the outcome of 9 adolescents treated with 2 to 3 cannulated cancellous screws for type-1 capitellum fractures. METHODS Records of 8 boys and one girl aged 12 to 14 (mean, 14) years with type-1 capitellum fractures were reviewed. The mechanism of injury was a fall on the flexed elbow. No patient had associated injuries or neurovascular compromise. In 2 patients, the fracture ...