TY - CPAPER TI - Study on pilot hole preparation and tapping on pullout pedicular screw resistan PY - 2007 AU - Defino, Helton Luiz Aparecido AU - Shimano, Antonio Carlos AU - Vendrame, José Roberto Benites AU - Kandziora, Frank T2 - Annual Meeting of The International Society for The Study of The Lumbar Spine J2 - Abstracts PP - Toronto PB - ISSLS ER -