Obstructive sleep apnea (OSA) is an underdiagnosed sleeprelated breathing disorder. Not only does it lack public awareness, but even clinicians and dentists may have had underestimated the seriousness of the condition to keep us alert in actively diagnosing them. In Hong Kong, the prevalence were 4.1% (1) and 2.1% (2) among middle-aged men and women respectively, which is similar worldwide.Male gender, old age, obesity, increased neck circumference and snoring are typical risk factors associated with OSA (3,4). OSA has been shown to be associated with multiple cardiovascular diseases (CVD) including hypertension, myocardial infarction, angina, heart failure, and stroke, as well as other metabolic diseases such as diabetes (5,6). Epilepsy was also found to be related to OSA, possibly resulting from hypoxaemia-mediated brain damage (7). In addition, research showed associations between OSA and