Abstract: A pre-printed semifinished product (130) to make an individual impression tray for obtaining an impression of a dental arch. The pre-printed semifinished product is substantially U-shaped and has a recess (101) on one side arranged to receive an impression material (80) in a thermoformable material and a protrusion (102) on the opposite side. The pre-printed semifinished product has at least one externally protruding wing (36) arranged to be used by a dentist (60) as manoeuvring grip for removing the impression tray with the impression material hardened inside. On the pre-printed semifinished product (130) a retention element (135) is arranged having a grip portion for the impression material. The grip portion remains visible in the pre-printed semifinished product (130) and is arranged to retain the impression material (80) during the removal of the impression tray from the dental arch of the patient.

Abstract: A kit to make an individual impression tray for dental use, the kit having a standard model reproducing a dental arch, a semifinished product of thermoformable material, for example, a plate member, and a container for a heat exchange liquid. The first step that is carried out by the dentist to obtain the individual impression tray provides the insertion of the model in the container. Then, next to dental arch of the model a plate member is arranged and hereafter a certain amount of a liquid is put, for example, water, in the container up to covering plate member. The liquid is then heated by a source of thermal power, for example, a microwave oven, stopping heating when the temperature of the liquid achieves a value T* higher than the temperature for softening the thermoformable material of the plate member.

Abstract: A dental instrument (1) for oral hygiene comprises a handpiece (10) having motor means (15) that is adapted to wheel a drive shaft (20) about a rotation axis (21). The dental instrument (1) comprises, furthermore, a cleaning element (40), in particular, with elongated shape and flexible, that is adapted for cleaning the dental surface and interdental spaces of a patient (100). Means for transmitting the movement (70) transmit the movement of the drive shaft (20) to the elongated cleaning element (40). The means for transmitting the movement (70) comprises an eccentric portion (75), whose axis (76) is arranged at a distance (?) from the axis (21) of the drive shaft (20). Therefore, during the rotation of the drive shaft (20) about its axis (21), the eccentric portion (75) oscillates with a desired oscillation amplitude (2?). To the eccentric portion (75), furthermore, a support (60) is pivotally connected [FIG. 7].

Abstract: A kit (1) to make an individual impression tray for dental use comprising essentially a standard model (20) reproducing a dental arch (24), a semifinished product of thermoformable material, for example a plate member (30), and a container (10) for a heat exchange liquid. The first step that is carried out by the dentist (60) to obtain the individual impression tray (100) provides the insertion of the model (20) in the container (10). Then, next to dental arch of the model (20) a plate member (30) is arranged and hereafter a certain amount of a liquid is put (15), for example water, in the container (10) up to covering plate member (30). The liquid (15) is then heated by a source of thermal power, for example a microwave oven (40) stopping heating when the temperature of the liquid (15) achieves a value T* higher than the temperature for softening the thermoformable material of the plate member (30).