TY - RPRT TI - Vascularized bone flap for access to the maxillary sinus. AU - P H Choung AU - Y H Choung PY - 1997 DO - 10.1016/s0278-2391(97)90343-8 UR - https://pubmed.ncbi.nlm.nih.gov/9251611/ ID - 9251611 ER -