Abstract: A retractor for use in lingual frenotomy has a tapered hollow shield, having a closed distal end and an open proximal rim, a groove opening through the distal end to seat over the lingual frenulum, and a handle extending from the proximal rim in line with the groove.

Abstract: A retractor for use in lingual frenotomy has a tapered hollow shield, having a closed distal end and an open proximal rim, a groove opening through the distal end to seat over the lingual frenulum, and a handle extending from the proximal rim in line with the groove.

Abstract: The invention provides a high-speed buffer that may used at the input of an integrated circuit, such as an input buffer. This buffer may be configured for use as a standard buffer with a single switching threshold, such as a TTL-to-CMOS buffer, or used as a Schmitt trigger with hysteresis, which as at least two switching thresholds. The integrated circuit may be a programmable logic device (PLD) or field programmable gate array (FPGA), but in other embodiments, the integrated circuit may be other types of devices such a microprocessors, ASICs, or memories.