Method (100, 200) of estimating and displaying a result of a dental treatment plan, which comprises: - a step of positioning retractors in a patient's mouth; - a step of reconstructing, in a first three-dimensional virtual space, the shape of the patient's face, comprising: - a first step of capturing, by an RGB-D sensor, at least one image of the patient's face, and - a first step of approximating the shape of at least one portion of the patient's face in relation to a parametric face shape model based on at least one captured image of the face; - a step of reconstructing, in a second three-dimensional virtual space, a patient's dentition, comprising: - a step of capturing, by a sensor, an image of the patient's dentition, - a step of calculating a probabilistic map of contours of at least one tooth of the dentition based on at least one captured image, and - a step of modelling the three-dimensional shape of at least one tooth based on a probable position of at least one contour; - a step of assembling the reconstructed shape of the face and the reconstructed dentition in a shared three-dimensional virtual space; - a step of removing the retractors from the patient's mouth; - a second step of capturing an image of the shape of the patient's face; - a second step of approximating, in a three-dimensional space, the shape of the patient's face in relation to a parametric face shape model based on at least one image of the face captured during the second capture step; - a step of positioning the modelled dentition in the three-dimensional virtual space of the face shape approximated during the second approximation step; - a step of determining at least one dental treatment plan based on both the dentition and face shape that have been modelled; - a step of selecting a dental treatment plan from among all the treatment plans determined; - a step of calculating an image of the patient's face after dental treatment, based on the image of the patient's face captured during the second capture step and the treatment plan selected; and - a step of displaying the image calculated. - a step of positioning retractors in a patient's mouth; - a step of reconstructing, in a first three-dimensional virtual space, the shape of the patient's face, comprising: - a first step of capturing, by an RGB-D sensor, at least one image of the patient's face, and - a first step of approximating the shape of at least one portion of the patient's face in relation to a parametric face shape model based on at least one captured image of the face; - a first step of capturing, by an RGB-D sensor, at least one image of the patient's face, and - a first step of approximating the shape of at least one portion of the patient's face in relation to a parametric face shape model based on at least one captured image of the face; - a step of reconstructing, in a second three-dimensional virtual space, a patient's dentition, comprising: - a step of capturing, by a sensor, an image of the patient's dentition, - a step of calculating a probabilistic map of contours of at least one tooth of the dentition based on at least one captured image, and - a step of modelling the three-dimensional shape of at least one tooth based on a probable position of at least one contour; - a step of capturing, by a sensor, an image of the patient's dentition, - a step of calculating a probabilistic map of contours of at least one tooth of the dentition based on at least one captured image, and - a step of modelling the three-dimensional shape of at least one tooth based on a probable position of at least one contour; - a step of assembling the reconstructed shape of the face and the reconstructed dentition in a shared three-dimensional virtual space; - a step of removing the retractors from the patient's mouth; - a second step of capturing an image of the shape of the patient's face; - a second step of approximating, in a three-dimensional space, the shape of the patient's face in relation to a parametric face shape model based on at least one image of the face captured during the second capture step; - a step of positioning the modelled dentition in the three-dimensional virtual space of the face shape approximated during the second approximation step; - a step of determining at least one dental treatment plan based on both the dentition and face shape that have been modelled; - a step of selecting a dental treatment plan from among all the treatment plans determined; - a step of calculating an image of the patient's face after dental treatment, based on the image of the patient's face captured during the second capture step and the treatment plan selected; and - a step of displaying the image calculated.