AKTIVITAS EXPRESSI KOLAGEN II DAN OSTEOCALSIN TULANG ALVEOL AKIBAT PRESERVASI SOKET PENCABUTAN GIGI DENGAN CAMPURAN ALOE VERA DAN GRAFT 0,5%: EXPRESSION ACTIVITY OF COLLAGEN II AND OSTEOCALCYN ALVEOLAR BONE QONSEQUENT PRESERVATION POST EXTRACTION SOCKET FILLED WITH A MIXTURE OF ALOE VERA AND GRAFT 0,5% - Utari Kresnoadi (TALENTA, 2014)