Abstract: A probe for measuring distances of clincal interest in a patient undergoing dental treatment has an end which is placed adjacent a first point and a tip which is extendable to a second point. A measurement apparatus in the housing, provides an output signal representative of the distance between the two points. An analyzer responsive to the output signal determines the distance. A friction mechanism assures that no more than a predetermined amount offorce is applied to the probe, making repetitive measurements accurate and avoiding damage to tissues. A microcomputer and printer analyze the data and present the data in a useful format. The tip of the probe is provided with storage apertures for use in delivering medication via the probe member. The probe is provided with an optical fibre cable and an optical encoder which is supported for rotary motion within the housing for eliminating cable twist evolved during manipulation.

Abstract: An apparatus for measuring the distance between two points in a patient undergoing dental diagnosis or treatment which includes a housing having an end which is placeable adjacent a first of said points. A distance measurement apparatus is coupled to the housing and provides an output signal representative of the distance between the two points. An analyzer responsive to the output signal determines the distance. The distance measurement apparatus may include an elongate probe slidably mounted in the housing so as to be extendable from one point to the other when the end of the housing is placed adjacent one said point. A probe actuator causes the probe to slide in the housing. A motion detector is responsive to motion of the probe with respect to the housing and provides an output which is useful for determining the position of the probe with respect to the housing. The probe actuator may be manually activated.

Abstract: A writing prosthesis includes a base adapted to be secured to the forearm of the user and includes a transparent extending portion to which a writing implement may be mounted. The base is supported for universal movement relative to a surface to be inscribed upon.

Abstract: A folding support constructed from arrays of interdigitated elongated members. The interdigitated elongated members are not hinged or joined together in any way, but rather are free to slide with respect to each other. The elongated members are joined to end pieces to form the arrays. A seat extends between the end pieces and rods or flexible members may be used to define the angular position between the arrays.