Abstract: Dental contrast formulations (“fillers”) of tailorable X-Ray radiopacity and methods for their use are provided. The disclosed fillers include mixtures of solid particles suspended in a biocompatible fluid. The solid particles contain one or more X-ray radiopaque materials. The biocompatible fluid can also contain one or more soluble X-ray radiopaque components. By controlling the composition of the solid particles, the composition of the biocompatible fluid, and the loading of the solid particles in the biocompatible fluid, the X-ray radiopacity and stability of the filler can be tailored to allow for improved discrimination of the filler within periodontal pockets, relative to adjacent soft tissue and teeth, so that the 3-D shape, volume, and depth of the pocket can be precisely and rapidly determined by X-Ray imaging.

Abstract: Dental contrast formulations (“fillers”) of tailorable X-Ray radiopacity and methods for their use are provided. The disclosed fillers include mixtures of solid particles suspended in a biocompatible fluid. The solid particles contain one or more X-ray radiopaque materials. The biocompatible fluid can also contain one or more soluble X-ray radiopaque components. By controlling the composition of the solid particles, the composition of the biocompatible fluid, and the loading of the solid particles in the biocompatible fluid, the X-ray radiopacity and stability of the filler can be tailored to allow for improved discrimination of the filler within periodontal pockets, relative to adjacent soft tissue and teeth, so that the 3-D shape, volume, and depth of the pocket can be precisely and rapidly determined by X-Ray imaging.

Abstract: A gas sensor comprises a cavity for containing a gas, means for generating radiation which is transmitted through the cavity and includes one or more wavelengths which is absorbed in use by a gas to be detected; and a detector for detecting radiation which has passed through the cavity. The walls of the cavity are sufficiently reflective to the radiation that the cavity is substantially uniformally illuminated with the radiation.

Abstract: An optical measuring device having multiple optical paths between one or more light emitters and one or more light detectors and/or providing at least two sets of wavelength of light along at least one path, with a final measurement being produced as a combination of measurements of the sets of wavelengths of light taken along one or more of the optical paths.

Abstract: A fetal heart rate electrode assembly, a connector for use therewith and a cable assembly including a housing assembly configured for engagement with the connector. The electrode assembly includes a drive knob configured and located for selective extension of a fetal scalp electrode beyond a distal end thereof. The connector comprises a rotationally omnidirectional contact assembly disposed within a dielectric housing including an annular groove on the exterior thereof. The housing assembly includes longitudinally resiliently biased pin contacts for end face contact with the contacts of the connector disposed within an inner housing of the housing assembly having an O-ring and an annular retention element positioned to respectively wipe the exterior of the connector housing and grasp the connector housing at the annular groove when the connector is inserted thereinto. A system and methods of use are also disclosed.