Abstract: A bonded retainer configured to stabilize a plurality of teeth in a jaw, the bonded retainer including a contact surface that is aligned overall with a parabolic curvature of the jaw in a longitudinal direction of the bonded retainer and that is aligned locally with a lingual surface contour of the teeth; a lingual surface that extends lingually in parallel with the contact surface, and retentions that extend from the lingual surface transversal to the longitudinal direction.

Abstract: A protective device for the needle tube of a syringe, including a housing which can be pivoted on a support base which has an open housing side in the pivot plane, so that the needle tube can be pivoted into the housing after being used for injection and wherein on the housing side, a retaining device is provided for the needle tube which has been pivoted inwards. The invention proposes that in addition to the connection of a film hinge in order to form a pivot axis, the support base and the pivotable housing are additionally connected together via a predetermined breaking point and wherein after being used for injection, the housing can be pivoted back over the destroyed predetermined breaking point.

Abstract: A method for producing a current state model of teeth of a patient from a scan of the teeth, the method including providing an old model of the teeth including first surface elements wherein each of the first surface elements is associated with precisely one tooth of the teeth to form a segmented old model of the teeth; initially bringing the scan and the old model into a coarse alignment; thereafter determining a bounding volume of at least one of the teeth in the old model; thereafter determining second surface elements in the scan of the teeth arranged within the bounding volume; thereafter copying copies of the first surface elements associated with the at least one of the teeth from the old model into a current state model; thereafter aligning the copies in the current state model with a minimum deviation from the second surface elements.

Abstract: A retainer for stabilizing a position of teeth of a human dentition, the retainer comprising: an arc that has a parabolic curvature overall so that the retainer is applicable to teeth of an upper jaw or lower jaw of a patient to be treated, wherein the retainer includes a plurality of local shapes that are arranged along a center line of the retainer and that are oriented perpendicular to the center line, wherein the local shapes are respectively adapted to cooperate with interdental spaces between adjacent teeth, wherein the retainer is integrally provided in one piece from a thermoplastic synthetic material which is configured to be processed by a SD pressure method.

Abstract: A method for producing an aligner for teeth of a patient, the method including initially capturing a virtual current model of the teeth with a current position of the teeth: segmenting the teeth in the virtual current model and interpolating interdental surfaces of the teeth; generating a virtual nominal model of the teeth including undercut portions from the virtual current model; automatically determining the undercut portions in the virtual nominal model; automatically removing all surface elements that are associated with the undercuts from the virtual nominal model; subsequently closing gaps in the virtual nominal model created by removing the surface elements wherein closing the gaps is performed by interpolation for blocking out; automatically blocking out the undercut portions in the virtual nominal model to produce a blocked out virtual nominal model; producing a real model of the teeth based on the blocked out virtual nominal model; applying a synthetic material foil to the real model by a deep draw