Abstract: The mastication enhancing device of the instant invention includes a hardened cusp for providing a hardened occlusal surface in a tooth, and means for retaining the hardened cusp in a predetermined pattern in a tooth. A major portion of a hardened cusp is embedded in the tooth. Cusps may be arranged in an opposing, offset pattern in upper and lower teeth to provide a point-contact between occlusal surfaces of upper and lower teeth.

Abstract: A ladder locking device designed for attachment to a frame-mounted ladder. The ladder lock includes a panel dimensioned to cover the front side of the ladder over an area including a plurality of ladder rungs. The upper edge of the panel is bent to form a lip engageable with an upper ladder rung. Attached to a lower portion of the panel is a lock operable to position a locking member into engagement or disengagement with a lower ladder rung, whereby the device is locked to or released from the ladder.