| Summary: | 碩士 === 高雄醫學大學 === 公共衛生學研究所 === 89 === The objectives of this study is to measure the air concentration of volatile organic compounds（VOCS） during dental service and evaluate the influences of indoor air quality (IAQ) human health.
The widespread uses of VOC’s in prosthodontic dentistry were selected as our study subjects. The IAQ was measured by automatic sampling method (ASM).The measured items consist of CO、CO2、PM10、temperature (T)、wind speed (V) and indoor RH. Meanwhile, the multi-point sampling with indoor average points of HCHO、CO2 and TVOC. And the sampling process was continuously monitored in 7 days, 24 hours per day. Besides, the in-site air change rate（ACH） was measured.
In workday (8:00-18:00) the results of HCHO reached around 0.54 (0.20) ppm , higher than 0.1ppm standards.CO2 was 1265.10（183）、1299.08（344.24）ppm higher than 1000ppm standard. TVOC was 5.44ppm (2.10), higher than 3ppm standards. Besides, And （ACH）was 1.48 times per hour.
To base on the result of two evaluate method, we selected the time period of indoor air quality was less than the normal level（15：30∼17：30；Monday）, use TO-15 to measure the qualitative and quantitative analysis of volatility organic matter. All the data received indicated that the concentration of MMA（about 2.8ppm） is the highest in all analyzed volatility organic matter. According to the Hazard Index, the HI=16.4＞1, exhibit that the indoor worker may have the chronic occupational risks of no carcinogenic.
According to investigation the dentist and workers obviously were exposed in substandard workroom. TVOC、HCHO and CO2 individual higher than standards 1.2times、1.8time and 0.45 time , therefore it is recommended to install local vacuum devices. At least the（ACH）should add 6 times per hour to improve local ventilation conform to standard.
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