TY - JOUR AU - Kim, H-J; Chun, H J; Kang, K T TI - The biomechanical effect of pedicle screws' insertion angle and position on the superior adjacent segment in 1 segment lumbar fusion JO - Spine (Phila Pa 1976) IS - 19 VL - 37 PY - 2012 DO - 10.1097/BRS.0b013e31823f2115 L3 - PubMed-ID: 22089393 SP - 1637 EP - 1644 ER -