There is evidence supporting that OSAS is an independent risk factor for cardiovascular and cerebrovascular diseases such as hypertension, congestive heart failure, myocardial infarction, cardiac-arrhythmia, and stroke.Gender, age, smoking, obesity and diabetes, which are risk factors for periodontitis,It is also common in OSAS at the same time.In addition to common risk factors, both OSAS and periodontitis have been shown to be associated with increased cystic inflammation.It has been reported that elevated inflammatory markers in OSAS patients may be associated with periodontal inflammation, although the mechanism of OSAS to systemic inflammation has not yet been clarified.