Method for recording a mandibular kinematics of an individual

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 markers during mandibular movements made by the individual with the infrared camera.

1 . A method for recording a mandibular kinematics of an individual, comprising:
 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 markers during mandibular movements made by the individual with the infrared camera.   
     
     
         2 . The method of  claim 1 , wherein attaching the first marker on the attachment device comprises:
 presenting the inner face of the marker provided with the two attachment lugs facing the extra-oral portion of the attachment device, and   engaging a first lug in a first recess then a second lug in a second recess while elastically deforming the tab such that said tab exerts a pressure force on the second lug.   
     
     
         3 . The method of  claim 2 , wherein the extra-oral portion further comprises two lateral fins and wherein attaching the first marker on the attachment device comprises deforming elastically each lateral fin when each lug is engaged in a respective recess so as to exert a pressure force on the inner face of the marker. 
     
     
         4 . The method of  claim 1 , wherein a face of the intra-oral portion oriented towards the teeth comprises at least one notch engaging in a relief of the teeth of the mandibular ach. 
     
     
         5 . The method of  claim 1 , wherein the intra-oral portion does not extend beyond a plane formed by an upper surface of the teeth of the mandibular arch. 
     
     
         6 . The method of  claim 1 , wherein the extra-oral portion is situated below a plane of the individual's lips. 
     
     
         7 . The method of  claim 1 , wherein the intra-oral portion comprises two ends with divisible segments, the method further comprising cutting at least one divisible segment to adjust a size of the intra-oral portion to a size of the mandibular arch. 
     
     
         8 . The method of  claim 1 , wherein the first marker is releasably attached to the attachment device. 
     
     
         9 . A method for recording a mandibular kinematics of an individual, comprising:
 attaching a first marker comprising a plurality of reflective patches or beads to a first 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 first 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 comprising a plurality of reflective patches or beads to a second attachment device fixed to a maxillar arch of the individual, wherein the second marker comprises an inner face provided with two attachment lugs and the second attachment device comprises:
 an intra-oral portion having a general U shape coming into contact with an outer face of teeth of the maxillar arch, 
 an extra-oral portion comprising two recesses each adapted for receiving a respective lug of the second 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, 
   recording relative displacements of said first and second markers during mandibular movements made by the individual with the infrared camera.   
     
     
         10 . The method of  claim 9 , wherein attaching the first or second marker on the first or second attachment device comprises:
 presenting the inner face of the first or second marker provided with the two attachment lugs facing the extra-oral portion of the respective first or second attachment device, and   engaging a first lug in a first recess then a second lug in a second recess while elastically deforming the tab such that said tab exerts a pressure force on the second lug.   
     
     
         11 . The method of  claim 10 , wherein the extra-oral portion of the first or second attachment device further comprises two lateral fins and wherein attaching the first or second marker on the first or second attachment device comprises deforming elastically each lateral fin when each lug is engaged in a respective recess so as to exert a pressure force on the inner face of the first or second marker. 
     
     
         12 . The method of  claim 9 , wherein the intra-oral portion of the first or second attachment device comprises two ends with divisible segments, the method further comprising cutting at least one divisible segment to adjust a size of the intra-oral portion to a size of the mandibular or maxillar arch. 
     
     
         13 . The method of  claim 9 , wherein at least one of the first and the second marker is releasably attached to the respective first or second attachment device. 
     
     
         14 . A method for recording a mandibular kinematics of an individual, comprising:
 attaching a first marker 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 to a forehead of the individual, 
   wherein the first and second markers each comprise at least one of: a chart formed of a two-coloured pattern of known geometry, a diode, an electromagnetic coil, an inertial measurement unit, an accelerometer and a gyroscope, and   recording relative displacements of said first and second markers during mandibular movements made by the individual.   
     
     
         15 . The method of  claim 14 , wherein attaching the first marker on the attachment device comprises:
 presenting the inner face of the marker provided with the two attachment lugs facing the extra-oral portion of the attachment device, and   engaging a first lug in a first recess then a second lug in a second recess while elastically deforming the tab such that said tab exerts a pressure force on the second lug.   
     
     
         16 . The method of  claim 15 , wherein the extra-oral portion further comprises two lateral fins and wherein attaching the first marker on the attachment device comprises deforming elastically each lateral fin when each lug is engaged in a respective recess so as to exert a pressure force on the inner face of the marker. 
     
     
         17 . The method of  claim 14 , wherein a face of the intra-oral portion oriented towards the teeth comprises at least one notch engaging in a relief of the teeth of the mandibular ach. 
     
     
         18 . The method of  claim 14 , wherein the intra-oral portion does not extend beyond a plane formed by an upper surface of the teeth of the mandibular arch. 
     
     
         19 . The method of  claim 14 , wherein the extra-oral portion is situated below a plane of the individual's lips. 
     
     
         20 . The method of  claim 14 , wherein the intra-oral portion comprises two ends with divisible segments, the method further comprising cutting at least one divisible segment to adjust a size of the intra-oral portion to a size of the mandibular arch. 
     
     
         21 . The method of  claim 14 , wherein the first marker is releasably attached to the attachment device. 
     
     
         22 . A method for recording a mandibular kinematics of an individual, comprising:
 attaching a first marker to a first 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 first 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 to a second attachment device fixed to a maxillar arch of the individual, wherein the second marker comprises an inner face provided with two attachment lugs and the second attachment device comprises:
 an intra-oral portion having a general U shape coming into contact with an outer face of teeth of the maxillar arch, 
 an extra-oral portion comprising two recesses each adapted for receiving a respective lug of the second 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, 
   wherein the first and second markers each comprise at least one of: a chart formed of a two-coloured pattern of known geometry, a diode, an electromagnetic coil, an inertial measurement unit, an accelerometer and a gyroscope,   recording relative displacements of said first and second markers during mandibular movements made by the individual.