论文部分内容阅读
氩离子激光(488nm)发青绿色光,它照射牙釉质和牙本质后发黄色光。其黄光如用滤过装置把从牙齿反射的青绿光消除后,即可看到,并能拍摄下来。从横断面看,照射后通常是牙本质比牙釉质暗。在牙釉质明亮部分同样可见到初龋区比周围照射区明显的发暗。这较其他临床法更容易发现小裂沟窝及颊侧龋坏的初期变化,多数情况下甚至也能诊断初期邻面龋坏,用酸化凝胶使牙釉质人工脱钙,激光照射后也能观察到同样的暗改变区。应用显微X线照像术,可以确认,用激光所观察到的牙釉质暗区与龋坏脱钙的特征是一致的,并发现牙釉质形成中,各阶段呈
Argon-ion laser (488nm) emits a greenish-blue light, which emits yellow light upon irradiation of enamel and dentin. The yellow light, such as filter device to eliminate the green light reflected from the teeth, you can see, and can shoot down. In cross-section, the dentin is usually darker than enamel after irradiation. In the bright part of the enamel can also be seen early dental caries than the surrounding area was significantly darker. This is more than other clinical methods found more likely to find small fissure fossa and buccal caries initial change, in most cases even diagnosed early adjacent caries, with artificial gelatin enamel artificial decalcification, the laser can also be irradiated The same dark area of change was observed. Using microscopic radiography, it was confirmed that the dark area of enamel observed with laser was consistent with the characteristics of carious decalcification and found that in all stages of enamel formation