Abstract:
The invention relates to a method for monitoring a property of the appearance of the teeth of a patient, said method including the following consecutive steps: A) acquiring, by means of a first acquisition apparatus, at least one first two-dimensional image of said teeth and of a first reference gauge, referred to as "initial image"; B) acquiring, by means of a second acquisition apparatus, at least one second two-dimensional image of said teeth and of a second reference gauge having the same appearance as the first reference gauge, referred to as "updated image"; C) standardising the initial and updated images such that the representations of the first and second reference gauges on the standardised initial and updated images have the same appearance; D) before or after step C, marking the same region of the teeth on the initial and updated images; and E) comparing the appearance of said region in the standardised initial and updated images.
Abstract:
The invention relates to a method for optimising initial discriminating information extracted from a two-dimensional image of the dental arches of a patient, referred to as "acquired image", by means of a three-dimensional digital reference model of at least one portion of an arch of the patient, said method including the following steps: C1. assessing the quality of the initial discriminating information and a quality threshold, filtering so as to keep only the initial discriminating information that has quality higher than the quality threshold, and defining "the discriminating information to be tested" as being the initial discriminating information selected; C2. testing a consistency between the discriminating information to be tested and said reference model; C3. assessing the result of the test and, in accordance with said assessment: adding discriminating information that was not kept to the discriminating information to be tested and/or deleting discriminating information from the discriminating information to be tested, and then returning to step C2. or; defining the optimal discriminating information as being the discriminating information to be tested.
Abstract:
The invention relates to a method for monitoring the shape of the teeth of a patient, including the following steps: a) producing a three-dimensional digital model of at least one portion of an arch of the patient, preferably of the arches of the patient, or "initial reference model"; b) acquiring at least one two-dimensional image of the arches of the patient, referred to as "updated image", under actual acquisition conditions; c) analysing each updated image and producing, for each updated image, an updated map relating to a piece of discriminating information; d) optionally determining, for each updated image, rough virtual acquisition conditions that approximate said actual acquisition conditions; e) searching each updated image for a final reference model corresponding to the shape of the teeth, and optionally to the positioning of the teeth, during the acquisition of the updated image; and f) comparing the shapes of the initial reference model and of the reference model obtained at the end of the preceding steps, referred to as "final reference model", in order to determine the deformation and/or the movement of the teeth between steps a) and b).
Abstract:
Système de prédiction d'une situation dentaire future pour un patient actuel, comportant: - une base de données informatiques, sur laquelle des données historiques sont enregistrées; - des moyens d'acquisition de données pour l'acquisition, à un instant actuel, de données relatives à une situation dentaire vécue par ledit patient actuel; - un programme d'ordinateur comprenant des instructions qui conduise celui-ci à mettre en œuvre les étapes suivantes : construction d'un modèle prédictif permettant de prédire comment une valeur d'un paramètre de positionnement de dents va évoluer, détermination de deux courbes (T max , T min ) fournissant l'évolution temporelle dudit paramètre de positionnement jusqu'à un instant futur objectif (t f ) et définissant des limites minimale et maximale considérées comme acceptables pour ledit paramètre de positionnement, représentation des deux courbes sur un même graphique.
Abstract:
L'invention concerne un procédé de contrôle du positionnement de dents d'un patient, ledit procédé comportant les étapes suivantes : a) moins de 3 mois après le début d'un traitement orthodontique, réalisation d'un modèle de référence initial des arcades du patient, et, pour chaque dent, définition, à partir du modèle de référence initial, d'un modèle de dent ; b) acquisition d'au moins une image actualisée desdites arcades, dans des conditions d'acquisition réelles ; c) analyse de chaque image actualisée et réalisation, pour chaque image actualisée, d'une carte actualisée relative à une information discriminante ; d) optionnellement, détermination, pour chaque image actualisée, de conditions d'acquisition virtuelles grossières approximant lesdites conditions d'acquisition réelles ; e) recherche, pour chaque image actualisée, d'un modèle de référence final correspondant au positionnement des dents lors de l'acquisition de l'image actualisée, et ; f) pour chaque modèle de dent, comparaison des positionnements dudit modèle de dent dans le modèle de référence initial et dans le modèle de référence obtenu à l'issue des étapes précédentes, afin de déterminer le déplacement des dents entre les étapes a) et b).
Abstract:
The invention relates to a method for monitoring the positioning of the teeth of a patient, said method including the following steps: a) less than three months after the end of an orthodontic treatment, producing an initial reference model of the arches of the patient, and, for each tooth, defining, from the initial reference model, a tooth model; b) acquiring at least one updated image of said arches, under actual acquisition conditions; c) analysing each updated image and producing, for each updated image, an updated map relative to a piece of discriminating information; d) optionally determining, for each updated image, rough virtual acquisition conditions that approximate said actual acquisition conditions; e) searching each updated image for a final reference model corresponding to the positioning of the teeth during the acquisition of the updated image, and; f) for each tooth model, comparing the positions of said tooth model in the initial reference model and in the reference model obtained at the end of the preceding steps, in order to determine the movement of the teeth between steps a) and b).