TY - GEN AU - Meffert,R M TI - Periodontics: past and present SN - 1042-2722 PY - 1998///0422 KW - Alveolar Bone Loss KW - surgery KW - Bone Regeneration KW - Guided Tissue Regeneration, Periodontal KW - Humans KW - Periodontics KW - trends N1 - Publication Type: News ER -