In 1997 the FDA approved lasers that remove tooth decay and earlier this year gave the thumbs up to laser treatments for root canals and other hard-tissue procedures.

• 1997年，FDA批准激光用以切除牙齿腐烂部分。而今年早些时候，FDA又同意将激光用于治疗牙槽和其它硬组织的治疗过程中。