Abstract: A method for recording a mandibular kinematics of an individual comprises: attaching a first marker comprising a plurality of reflective patches or beads to an attachment device fixed to a mandibular arch of the individual, wherein the first marker comprises an inner face provided with two attachment lugs and the attachment device comprises: an intra-oral portion having a general U shape coming into contact with an outer face of teeth of the mandibular arch, an extra-oral portion comprising two recesses each adapted for receiving a respective lug of the first marker, said recesses being separated by a tab adapted for being elastically deformed when one of the lugs is engaged in a respective recess so as to exert a pressure force on said lug, and a connecting portion connecting the intra-oral portion and the extra-oral portion, attaching a second marker provided with a plurality of reflective patches or beads to a forehead of the individual, and recording relative displacements of said first and second m

Abstract: A device for attaching a localization marker to the lower jaw of an individual. The marker includes an inner face provided with two attachment lugs including an intra-oral portion having a general U-shape adapted for coming into contact with the outer face of the teeth of the lower jaw, an extra-oral portion including an attachment element for the marker, a connecting portion connecting the intra-oral portion and the extra-oral portion. The attachment element includes two recesses each adapted for receiving a respective lug of the marker, the recesses being separated by a tab adapted for being elastically deformed when one of the lugs is engaged in a respective recess so as to exert a pressure force on the lug.

Abstract: The invention relates to a method for registering non-radiographic virtual models of a mandibular arch and a maxillary arch of an individual with a non-radiographic digital model of the face of said individual, comprising: fastening a mandibular marker rigidly on the mandibular arch of the individual, said mandibular marker defining a first frame of reference, providing a non-radiographic virtual model of the mandibular arch and a non-radiographic virtual model of the maxillary arch, digitising at least one portion of the surface of the teeth or a prosthetic device integral with said arch and at least one rigid portion of said marker by means of an intra or extra-oral camera, so as to produce a digital recording of said portions of the mandibular arch and the marker in a same second frame of reference, from said recording and the virtual models of the mandibular arch and the mandibular marker, matching the digital model of the mandibular marker with the marker, and the virtual model of the mandibular arch

Abstract: The invention relates to a method for animating models of the mandibular and maxillary arches of a patient in a corrected intermaxillary relationship, comprising: —providing three-dimensional numerical models (MD, MX) of the mandibular and maxillary arches of the patient; —providing a recording of the mandibular motion of the patient, said recording comprising a plurality of relative positions of the mandible of the patient with respect to the maxilla; —selecting, from said positions, a reference position (X) of the mandible with respect to the maxilla of the patient; —determining a target position (Y) for the mandible with respect to the maxilla, said target position defining a corrected intermaxillary relationship for the patient; —determining a rigid transformation between the reference position (X) and the target position (Y); —applying said rigid transformation (i) to the recording of the mandibular motion of the patient in order to animate the three-dimensional numerical models of the mandibular and max

Abstract: A device for attaching a localization marker to the lower jaw of an individual. The marker includes an inner face provided with two attachment lugs including an intra-oral portion having a general U-shape adapted for coming into contact with the outer face of the teeth of the lower jaw, an extra-oral portion including an attachment element for the marker, a connecting portion connecting the intra-oral portion and the extra-oral portion. The attachment element includes two recesses each adapted for receiving a respective lug of the marker, the recesses being separated by a tab adapted for being elastically deformed when one of the lugs is engaged in a respective recess so as to exert a pressure force on the lug.

Abstract: The invention relates to a method for determining a mapping of the contacts and/or distances between the teeth of the maxillary arch and the mandibular arch of a patient, characterised in that it comprises the following steps: obtaining the mandibular kinematics recorded on the patient; obtaining surface meshes of the maxillary arch and the mandibular arch and registering said meshes relative to one another; creating a reduced mesh of at least one of said arches, comprising the selection, in the mesh of said arch, of the cells in which the nodes are located at a distance of less than 1 cm from the mesh of the opposite arch; creating, for each cell of said reduced mesh, a bounding box comprising a plurality of voxels surrounding said cell; using the mandibular kinematics, calculating a network of contacts comprising, for each voxel of the bounding box, information on the existence of a contact between said voxel and a node of the mesh of the opposite arch during a relative movement of the mandibular arch in

Abstract: The invention relates to a method for modeling the mandibular kinematics of a patient, comprising: acquiring at least one stereoscopic image of the face of the patient by means of a stereoscopic camera, constructing, from said stereoscopic image, a three-dimensional surface model of the face of the patient, identifying characteristic elements of the face of the patient on said stereoscopic image or on said three-dimensional surface model of the face of the patient, from said characteristic elements, determining, on said stereoscopic image, respectively said three-dimensional surface model of the face of the patient, reference points, axes and planes of the face of the patient, obtaining a three-dimensional model of the maxillary dental arch and a three-dimensional model of the mandibular dental arch of the patient, registering the three-dimensional models of the dental arches with respect to the reference planes of the three-dimensional surface model of the patient, recording the mandibular kinematics o

Abstract: The invention relates to a method for determining a mapping of the contacts and/or distances between the teeth of the maxillary arch and the mandibular arch of a patient, characterised in that it comprises the following steps: obtaining the mandibular kinematics recorded on the patient; obtaining surface meshes of the maxillary arch and the mandibular arch and registering said meshes relative to one another; creating a reduced mesh of at least one of said arches, comprising the selection, in the mesh of said arch, of the cells in which the nodes are located at a distance of less than 1 cm from the mesh of the opposite arch; creating, for each cell of said reduced mesh, a bounding box comprising a plurality of voxels surrounding said cell; using the mandibular kinematics, calculating a network of contacts comprising, for each voxel of the bounding box, information on the existence of a contact between said voxel and a node of the mesh of the opposite arch during a relative movement of the mandibular arch in

Abstract: The invention relates to a method for designing a dental appliance for a facial skeleton including dental crowns and the roots corresponding thereto, said method including the following steps: producing a volumetric image of the facial skeleton, in the form an initial digital file, using medical imaging; modifying said volumetric image by means of the computer processing of said initial digital file, and obtaining a modified digital file, said modification including at least one tooth movement with a view to implementing a desired correction of the dentition; designing said dental appliance using said initial digital file and said modified digital file, and producing a file capable of being used by digitally controlled machines capable of manufacturing a dental appliance.

Abstract: The invention relates to a method for modeling the mandibular kinematics of a patient, comprising: acquiring at least one stereoscopic image of the face of the patient by means of a stereoscopic camera, constructing, from said stereoscopic image, a three-dimensional surface model of the face of the patient, identifying characteristic elements of the face of the patient on said stereoscopic image or on said three-dimensional surface model of the face of the patient, from said characteristic elements, determining, on said stereoscopic image, respectively said three-dimensional surface model of the face of the patient, reference points, axes and planes of the face of the patient, obtaining a three-dimensional model of the maxillary dental arch and a three-dimensional model of the mandibular dental arch of the patient, registering the three-dimensional models of the dental arches with respect to the reference planes of the three-dimensional surface model of the patient, recording the mandibular kinematics of t

Abstract: The invention relates to a method for designing a dental appliance for a facial skeleton including dental crowns and the roots corresponding thereto, said method including the following steps: producing a volumetric image of the facial skeleton, in the form an initial digital file, using medical imaging; modifying said volumetric image by means of the computer processing of said initial digital file, and obtaining a modified digital file, said modification including at least one tooth movement with a view to implementing a desired correction of the dentition; designing said dental appliance using said initial digital file and said modified digital file, and producing a file capable of being used by digitally controlled machines capable of manufacturing a dental appliance.