Buccal Fat Pad Reinforce Buccal Advancement Flap Vs Rotational Palatal Flap in Chronic Oroantral Fistula Treatment Research Authors MM Elshamaa, SA Elborolsy, H Mahran Research Date Fri, 1 Jan 2021 - 12:00 Research Department Department of General Surgery Research Journal Egyptian Dental Journal 67 (4), 3013-3021 Research Member Hamada Abdel-Hay Hamid Mahran