Abstract
The etiology includes the sum of evidences related to the
causes of a disease. Majority of all forms of periodontal diseases,
are considered as microorganisms-induced dependent. However,
it is improbable that bacteria alone cause periodontal disease.
The etiological concept of the inflammatory periodontal disease is
an exceedingly complex interaction of bacteria and predisposing
risk factors. The predisposing risk factor may be an inherent
characteristic associated with an increased rate of a subsequently
occurring disease, but does not necessarily cause the disease. In
periodontal disease, the predisposing risk factors may be defined
as local environmental factors, behavioral factors in nature and
systemic factors, which may be responsible in providing an ideal
environment for bacterial colonization and/or fragility in a
determinate tooth or teeth and adjacent periodontal tissues and/
or interference in the inflammatory process. Local environmental
factor may interfere in the fragile equilibrium of the gingival sulcus
defense by favoring microbial colonization and growth or/and
altering the local susceptibility of the periodontal tissues to be
damaged by the bacterial onslaught.
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