Tsuyoshi Koyama Nobuhiko Sugano Hidenobu Miki Takashi Nishii Yoshinobu Sato Hideki Yoshikawa Shinichi Tamura Takahiro Ochi Computer-Assisted Minimally Invasive Curettage and Reinforcement of Femoral Head Osteonecrosis with a Novel, Expandable Blade Tool. 169-175 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3217&spage=169 2004 conf/miccai/2004-2 MICCAI (2) db/conf/miccai/miccai2004-2.html#KoyamaSMNSYTO04