| 摘要 |
<p>The process comprises use of clamps to assemble a heater system and a sensor, and temp., time and alarm controls. Ultraviolet and laser radiation and ultrasound are applied for catalytic discoloration. The tooth crowns are covered with a container mould incorporating in its absorbent material the discolouration agent made up of hydrogen peroxide, ammonia 30, 50 or 70%, ether, etc.</p> |
