caa a22 4500 477108504 CHVBK 20180405111602.0 cr unu---uuuuu 170330e19960201xx s 000 0 eng 10.1007/BF01411356 doi (NATIONALLICENCE)springer-10.1007/BF01411356 Chen I. Department of Neurosurgery, Taipei Municipal Chung-Hsiao Hospital, and National Yang-Ming University School of Medicine, Taipei, Taiwan, Republic of China aut Biomechanical evaluation of subcortical versus bicortical screw purchase in anterior cervical plating [Elektronische Daten] [I. Chen] Summary: The purpose of this in vitro study is to compare the stabilities provided by anterior cervical H-plating with screws purchased either subcortically or bicortically on porcine cervical spines. Nine porcine cervical spines (C3-C4) were challenged by 12 Nm in extension followed by 6 Nm in flexion in 6 consecutive steps, i.e., (1) when disc was intact, (2) after discectomy. Subsequently, a tricortical bone graft was inserted to simulate interbody fusion. Each specimen was tested again (3) when plated with 16 mm screws to purchase subcortically and (4) after cyclic loading (f=0.5 Hz, n=1000), (5) when plated with 30 mm screws to purchase bicortically and (6) after cyclic loading. Neutral zone and range of motion were parameters normalized for comparison. The results showed comparable stability in constructs plated with screws purchased either subcortically or bicortically before cyclic loading. Cyclic loading deteriorated construct-bone relation in both groups, yet bicortically purchased screws rendered additional stability in anterior cervical plating. Springer-Verlag, 1996 Anterior cervical fusion nationallicence biomechanics nationallicence cervical plating nationallicence Acta Neurochirurgica Springer-Verlag 138/2(1996-02-01), 167-173 0001-6268 138:2<167 1996 138 701 https://doi.org/10.1007/BF01411356 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01411356 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Chen I. Department of Neurosurgery, Taipei Municipal Chung-Hsiao Hospital, and National Yang-Ming University School of Medicine, Taipei, Taiwan, Republic of China aut NATIONALLICENCE 773 0- Acta Neurochirurgica Springer-Verlag 138/2(1996-02-01), 167-173 0001-6268 138:2<167 1996 138 701 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer