日本东京一家医疗机械厂制成一种可诊断早期龋齿的激光探测仪。该探测仪采用10Ｗ钇铝榴石激光器,照射01～02ｓ以后,再用高速温度探头测定牙齿温度。健全牙齿的表面温度为23～24°Ｃ,而有龋齿部分则升到30～32°Ｃ。另外,观察从侧面照射牙齿后的漏光,正常牙齿和龋齿也有很大区别 Tokyo, Japan, a medical machinery factory made of a diagnosis of early dental caries laser detector. The detector using 10W yttrium aluminum garnet laser, irradiation 01 ~ 02s later, and then use the high-speed temperature probe to determine the tooth temperature. The surface temperature of healthy teeth ranged from 23 to 24 ° C, while those with carious portions rose to 30 to 32 ° C. In addition, the observation of the light leakage from the side after irradiation of the tooth, the normal tooth and the tooth decay is also very different