KONSTANTINOS KAFCHITSAS

Asklepios Orthopaedic Clinic Lindenlohe, Lindenlohe, Germany

Publications

• Research Article
  The impact of the reduction and tightening procedure for the screw-rod assembly on pedicle screw anchorage: A biomechanical study
  Author(s): KONSTANTINOS KAFCHITSAS*, PHILIPP DREES, PHILIPP KOBBE and DAVID C. NORIEGA
  
  Introduction: In posterior thoracolumbar instrumentation, reduction and tightening of the rods are mechanically critical processes that may lead to overloading of the construct and surrounding tissues, possibly resulting in screw loosening, breakage, or disassembly of the implants. Study Objective: To investigate the impact of the reduction and tightening procedure to the pedicle screw-bone anchorage. Material and Methods: Two human cadaver specimens (T5-S1) fixed with pedicle screw-rod systems of different fixation philosophies, direct side-by-side comparison: Neo Pedicle Screw System™, controlled fixation and CD Horizon™ Solera™, standard fixation. Insertion torques and, after assembly and locking of the construct, extraction torques are recorded. The influence of the reduction and tightening procedure is demonstrated by comparing the difference.. Read More»