Evaluasi Implantasi Eksosom Sel Punca Asal Jaringan Adiposa dan PRF (Platelet-Rich Fibrin) pada Defek Kritis Tulang Panjang di Tikus Sprague-Dawley = Evaluation of Adipose-derived Stem Cells (ASCs) Exosome Implantation and Platelet-Rich Fibrin (PRF) on Critical Long Bone Defects in Sprague-Dawley Rats