Human umbilical cord mesenchymal stem cells induction in peri-implantitis Rattus norvegicus accelerates and enhances osteogenesis activity and implant osseointegration oleh Nike Hendrijantini, Mefina Kuntjoro, Bambang Agustono, Ratri Maya Sitalaksmi, Muhammad Dimas Aditya Ari, Marcella Theodora, Rudy Effendi, Ivan Setiawan Djuarsa, Jennifer Widjaja, Agung Sosiawan, Guang Hong