CORPUS CHRISTI, Texas, Oct. 12 -- American Medical Technologies Inc. has received 510(k) FDA clearance to market its new CaviLase Erbium:YAG hard-tissue dental laser. The CaviLase is cleared for all classes of cavity preparations, and most treatments can be done without anesthesia. The device uses variable pulsewidth technology to produce long pulses for hard tissue and short pulses for soft tissue. According to American Medical, this allows it to double the pulse rate of existing erbium units for smoother, better soft-tissue cutting.