1993 年 6 巻 2 号 p. 250-258
There were many bacteria in the air floating dusts. So we tried to measure a number of the air floating dusts (0.3, 0.5, 1, 3 and 5 μm in diameter) in our clinic from 9:38 to 15:53 the 27th April,1992. We used the HEPA unit with the HEPA filter in order to decrease the air floating dusts in an enclosed room. This HEPA unit has a characteristic of taking off more than 99.97% air floating dusts (over 0.3 μm). We could expect the effect of taking off air floating dusts in the enclosed room.When we measured them there, one person was sitting in the doctor's chair and another was sitting in the dental treatment unit. From 12:53 to 12:55, two men in this room were moving about.
The results of this examination were as follows.
1. We should use the HEPA unit in an enclosed room.
2. We should use surgical clothes in this room.
3. We should switch on the clean air unit 30 minutes before the implant operation.
4. The more people were in this room, the worse was air pollution there in.
The effects of making a clean room in our dental clinic are very valuable.