Department of Oral Biology;
Faculty of Oral and Dental Medicine;
Delta University for Science and Technology;
Mansoura 11152;
Egypt;
Department of Oral Surgery and Anesthesia;
Faculty of Oral and Dental Medicine;
Delta University for Science and Technology;
Mansoura 11152;
Egypt;
Department of Oral Biology;
Faculty of Dentistry;
Mansoura University;
Mansoura 35516;
Egypt;
Platelet-rich fibrin membrane; Bone marrow-derived stem cells; Critical-sized mandibular defects; Rats; Histological and immunohistochemical staining;