Phân tích tư tưởng của nhân dân qua đoạn thơ: Những người vợ nhớ chồng… Những cuộc đời đã hóa sông núi ta trong Đất nước của Nguyễn Khoa Điềm
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Periodontal disease is one of the major dental pathologies that affect human populations
worldwide at high prevalence rates (Petersen, 2003). Periodontal diseases represents a
family of heterogeneous chronic inflammatory lesions that involve the periodontium, a
connective tissue protected by the epithelium, important to attach the teeth to the bone in
the jaws and to support the teeth during function (Taylor, 2003). It is well known that
periodontal diseases are caused by the interaction between periodontopathogens, almost
gram-negative bacteria that grows on the teeth, and the host immune response to the
chronic infection which results in tissue destruction (Ratcliff & Johnson, 1999; Reynolds &
Meikle, 1997)....
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