Abstract: At least one embodiment of a method for a method of detecting an abnormality along a portion of a dental arch using scanning material comprising an ultrasonic periodontal probe configured for emitting ultrasound signals within at least one emitting cone and for receiving corresponding echoed ultrasound signals, the method comprising moving the probe along a portion of the dental arch, while moving the probe along the portion of the dental arch: emitting an ultrasound signal within the emitting cone; measuring echoed ultrasound signals; detecting at least one anatomical structure to be investigated; measuring at least one predetermined feature of the at least one detected anatomical structure to obtain a value of the measurement of the at least one predetermined feature characterizing the detected anatomical structure; detecting an abnormality as a function of a threshold and the value of the measurement of the predetermined feature of the at least one detected anatomical structure.

Abstract: At least one embodiment of a method for scanning material using a dental ultrasonic imaging probe comprising an ultrasonic device configured for emitting ultrasound signals within at least two emitting cones and for receiving corresponding echoed ultrasound signals, the at least two emitting cones extending in different directions, the method comprising: receiving an item of information relating to a direction for emitting an ultrasound signal; selecting one of the received corresponding echoed ultrasound signals or the ultrasound signals to be emitted as a function of the received item of information.

Abstract: At least one embodiment of an ultrasonic periodontal probe, the ultrasonic periodontal probe comprising a grip portion having a longitudinal axis, a support member comprising a part having a longitudinal axis different from the longitudinal axis of the grip portion, and an ultrasonic device fastened to the grip portion via the support member, wherein the ultrasonic device is configured for emitting ultrasound signals within at least two emitting cones and for receiving corresponding echoed ultrasound signals, the at least two emitting cones extending in opposite directions with regard to a plane comprising the longitudinal axis of the grip portion.

Abstract: An ophthalmic lens has a complex surface with a fitting cross, a progression meridian having a power addition greater than or equal to 1.5 diopters between far vision and near vision reference points. The complex surface has within a circle of radius 20 mm centered on the geometrical center of the lens, a cylinder value normalized to the addition of less than 0.8, and a rebound of the sphere quantity normalized to the addition of less than 0.04 on said circle. The surface also has a progression length less than or equal to 14 mm, defined as the vertical distance between the fitting cross and the point on the meridian for which the mean sphere reaches 85% of the addition. The lens is suited to hypermetropic wearers with a good perceptual comfort in peripheral vision and good accessibility in near vision.

Abstract: An ophthalmic lens has a complex surface with an optical centre, a fitting cross (FC) situated 4 mm above the optical centre, a meridian having a power addition between reference points in far vision (FV) and in near vision (NV). The complex surface has a mean-sphere difference normalized to the addition on the meridian, between the geometric centre of the lens and the control point in far vision, less than or equal to 0.1; a progression length less than or equal to 14 mm; a rebound of the sphere quantity normalized to the addition on a circle with a radius of 20 mm centred on the geometric centre of the lens less than 0.11, and a maximum slope of the sphere variation normalized to the addition along the meridian comprised between 0.9 and 0.11 mm?1. The lens is suited to broadened far vision with a good accessibility to near vision.

Abstract: An ophthalmic lens has a complex surface with a fitting cross, a progression meridian having a power addition greater than or equal to 1.5 diopters between far vision and near vision reference points. The complex surface has within a circle of radius 20 mm centred on the geometrical centre of the lens, a cylinder value normalized to the addition of less than 0.8, and a rebound of the sphere quantity normalized to the addition of less than 0.04 on said circle. The surface also has a progression length less than or equal to 14 mm, defined as the vertical distance between the fitting cross and the point on the meridian for which the mean sphere reaches 85% of the addition. The lens is suited to hypermetropic wearers with a good perceptual comfort in peripheral vision and good accessibility in near vision.

Abstract: An ophthalmic lens has a complex surface with an optical centre, a fitting cross (FC) situated 4 mm above the optical centre, a meridian having a power addition between reference points in far vision (FV) and in near vision (NV). The complex surface has a mean-sphere difference normalized to the addition on the meridian, between the geometric centre of the lens and the control point in far vision, less than or equal to 0.1; a progression length less than or equal to 14 mm; a rebound of the sphere quantity normalized to the addition on a circle with a radius of 20 mm centred on the geometric centre of the lens less than 0.11, and a maximum slope of the sphere variation normalized to the addition along the meridian comprised between 0.9 and 0.11 mm?1. The lens is suited to broadened far vision with a good accessibility to near vision.