自六十年代开始，激光在口腔医学上开始应用，由于其功率较高，对牙髓、牙龈及口腔粘膜均有刺激作用而未被广泛应用。九十年代开始，以镓铝砷二级体为光源的低能量半导体激光在日本、丹麦研究成功，应用于临床效果满意。一九九四年LD──100激光牙科治疗机在我国问世，经我院研 Since the 1960s, lasers have begun to be used in stomatology and have not been widely used due to their high power and stimulating effects on dental pulp, gums and oral mucosa. Since the 1990’s, low-energy semiconductor lasers using germanium-aluminum-arsenic secondary sources as light sources have been successfully studied in Japan and Denmark, and have been used in satisfactory clinical results. In 1994, the LD-100 laser dental treatment machine was introduced in our country and developed by our institute.