sistem 4dPADA MATERI SISTEM PERIODIK UNSUR KELAS X SMAMA SKRIPSI Diajukan untuk Memenuhi Sebagian Syarat Guna Memperoleh Gelar Sarjana Pendidikan dalam IlmuCaries staging and activity assessment is the second essential step in the 4D-cycle for effective and personalised care. It builds on the knowledge acquired from the 1 st D. The aim is to