Method for preparing a dental prosthesis based on electronically determined image and color/shade data and based on telephone communication

• US 7,682,150 B2
• Filed: 08/25/2006
• Issued: 03/23/2010
• Est. Priority Date: 01/02/1996
• Status: Expired due to Fees

• Current Assignee: RPX Corporation
• Original Assignee: JJL Technologies, L.L.C.
• Inventors: Jung, Wayne D., Loudermilk, Alan R., Jung, Russell W.
• Primary Examiner(s): MAI, HAO D
• Application Number:
  US11/510,494
• Publication Number:
  US 20070054242A1
• Time in Patent Office: 1,306 Days
• Field of Search: 433/26, 433/29, 433/203.1, 433/215, 356/405
• US Class Current: 433/26
• CPC Class Codes: A61B 2560/0233 Optical standards
• CPC Class Codes: A61B 2562/247 Hygienic covers, i.e. for covering the sensor or apparatus during use
• CPC Class Codes: A61B 5/0088 for oral or dental tissue
• CPC Class Codes: A61B 5/061 Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body A61B1/00158 takes precedence
• CPC Class Codes: A61B 5/4547 Evaluating teeth
• CPC Class Codes: A61C 19/04 Measuring instruments specially adapted for dentistry A61C5/44 takes precedence; testing vitality of teeth A61B5/0534; radiation diagnosis specially adapted for dentistry A61B6/51
• CPC Class Codes: A61C 19/10 Supports for artificial teeth for transport or for comparison of the colour
• CPC Class Codes: G01J 3/02 Details
• CPC Class Codes: G01J 3/0218 using optical fibers
• CPC Class Codes: G01J 3/0278 Control or determination of height or angle information for sensors or receivers
• CPC Class Codes: G01J 3/0291 Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements
• CPC Class Codes: G01J 3/50 using electric radiation detectors
• CPC Class Codes: G01J 3/508 measuring the colour of teeth
• CPC Class Codes: G01J 3/51 using colour filters
• CPC Class Codes: G01J 3/513 having fixed filter-detector pairs
• CPC Class Codes: G01J 3/52 using colour charts

Abstract

A method for preparing a dental prosthesis based on electronically determined image and color/shade data of a patient'"'"'s tooth is disclosed. The image data and the color/shade data are displayed on a display device in the dental office. The image data and color/shade data are transmitted to a computing device at a remote location over a data communication channel. A telephone communication is established between a dental professional in a location proximate to the dental office and a dental technician or ceramist in a location proximate to the remote location while the dental professional and the dental technician or ceramist are commonly viewing the image and color/shade data. The dental prosthesis is prepared at the remote location based on the electronically transmitted image and color/shade data. Color/shade data of the dental prosthesis is electronically determined and the dental prosthesis is selectively modified prior to installing the dental prosthesis in the patient.

Claims

1. A method for preparing a dental prosthesis based on electronically determined color/shade data indicative of a color or shade of at least one patient'"'"'s tooth, comprising the steps of:

generating image data for an image of the at least one patient'"'"'s tooth in a dental office;

electronically determining the color/shade data in the dental office;

visually outputting the image data and the color/shade data on a display device in the dental office;

transmitting the image data and color/shade data to a computing device at a remote location over a data communication channel, wherein the remote location is remote from the dental office;

establishing a telephone communication between a dental professional in a location proximate to the dental office and a dental technician or ceramist in a location proximate to the remote location, wherein the telephone communication occurs while the dental professional and the dental technician or ceramist are commonly viewing the image and color/shade data transmitted to the computing device at the remote location;

preparing the dental prosthesis at the remote location based on the electronically transmitted image and color/shade data; and

electronically determining color/shade data of the dental prosthesis, and based on the electronically determined color/shade data of the dental prosthesis selectively modifying the dental prosthesis prior to installing the dental prosthesis in the patient.

2. The method of claim 1, wherein the color/shade data are electronically determined via positioning of a probe positioned in relative proximity to the patient'"'"'s tooth, wherein the probe provides light to the patient'"'"'s tooth and receives light returned from the patient'"'"'s tooth, wherein the light received from the patient'"'"'s tooth is analyzed in a plurality of spectral bands.

3. The method of claim 2, wherein the probe includes at least one light source and at least one light receiver, wherein the light source and the light receiver define a minimal height between the probe and a surface of the patient'"'"'s tooth below which no light from the light source that is specularly reflected from the patient'"'"'s tooth is received and propagated by the light receiver, wherein at least one measurement is taken with the probe positioned a distance from the tooth that is less than the minimal height, wherein the color/shade data are electronically determined based on the at least one measurement.

4. The method of claim 1, wherein the color/shade data are electronically determined based on the image data.

5. The method of claim 4, wherein the color/shade data are electronically determined based on the data indicative of the image of the patient'"'"'s tooth and data indicative of a reference standard of at least one known optical property.

6. The method of claim 5, wherein an image is captured of the patient'"'"'s tooth and the reference standard when the patient'"'"'s tooth and the reference standard are concurrently in the field of view of a imaging implement.

7. The method of claim 6, wherein the imaging implement comprises a camera.

8. The method of claim 1, wherein, based on at least the color/shade data information is output indicative of one or more closest match of one or more stored shade guide values.

9. The method of claim 8, wherein information is output indicative of a confidence level or degree of closeness of the one or more closest match.

10. The method of claim 1, wherein, based on at least the color/shade data, information is output indicative of one or more materials for preparation of the dental prosthesis.

11. The method of claim 1, wherein, based on at least the color/shade data, information is output indicative of at least a thickness of a layer of material for preparation of the dental prosthesis.

12. The method of claim 1, wherein, based on at least the color/shade data, information is output indicative of instructions for preparation of the dental prosthesis.

13. The method of claim 1, wherein translucence data indicative of translucence are electronically determined.

14. The method of claim 13, wherein the dental prosthesis is prepared based on color/shade and translucence characteristics of the patient'"'"'s tooth.

15. The method of claim 1, wherein based on the image data software determines areas of the patient'"'"'s tooth of a common optical property.

16. The method of claim 1, wherein the image data and the color/shade data are stored in a database, wherein the database includes a plurality of database records for a plurality of patients.

17. The method of claim 1, wherein the image is displayed with the color/shade data concurrently displayed.

18. The method of claim 17, wherein the color/shade data is displayed in an overlaid manner over the image of the patient'"'"'s tooth.

19. The method of claim 1, further comprising the step of electronically determining color/shade characteristics of the prepared dental prosthesis prior to installation of the dental prosthesis.

20. The method of claim 19, wherein the color/shade characteristics of the prepared dental prosthesis are electronically determined at the remote location.