Method for producing a drill assistance device for a tooth implant

• US 6,319,006 B1
• Filed: 10/31/2000
• Issued: 11/20/2001
• Est. Priority Date: 11/03/1999
• Status: Expired due to Term

• Current Assignee: Sirona Dental Systems GmbH (Sirona Dental Systems Incorporated)
• Original Assignee: Sirona Dental Systems GmbH (Sirona Dental Systems Incorporated)
• Inventors: Scherer, Franz, Pfeiffer, Joachim
• Primary Examiner(s): WEHNER, CARY ELLEN
• Application Number:
  US09/699,363
• Time in Patent Office: 385 Days
• Field of Search: 433/75, 433/76, 433/173, 433/214, 433/215
• US Class Current: 433/215
• CPC Class Codes: A61B 6/506 for diagnosis of nerves
• CPC Class Codes: A61C 1/084 of implanting tools

Abstract

A method for producing a drill assistance device for a tooth implant includes the process steps of, initially the taking of an x-ray picture of the jaw and the compilation of a corresponding measured data record; then a three-dimensional, optical measurement of the visible surfaces of the jaw and of the teeth and the compilation of a corresponding measured data record. The measured data records from the x-ray picture and the measured data records from the three-dimensional, optical image are correlated with each other. Based on the information that is now available the type and position of the implant relative to the adjacent teeth is planned and a drill template is produced which is attached to the neighboring teeth, thus making the exact drilling of the implant pilot hole possible.

Claims

1. Method for producing a drill assistance device for a tooth implant in a person'"'"'s jaw, comprising the following process steps:

taking an x-ray picture of the jaw and compiling a corresponding measured data record,

carrying out a three-dimensional optical measuring of the visible surfaces of the jaw and of the teeth and compiling a corresponding measured data record,

correlating the measured data records from the x-ray picture and from the measured data records of the three-dimensional optical measuring,

determinating the optimal bore hole for the implant, based on the x-ray picture, and

determinating a pilot hole in a drill template relative to surfaces of the neighboring teeth based on the x-ray picture and optical measurement.

2. The method according to claim 1, wherein the x-ray picture is one of a panoramic tomography image, a tomosynthetic image or a computer tomography image.

3. The method according to claim 1, wherein the three-dimensional, measured, visible surfaces are the occlusal surfaces of neighboring teeth located on the jaw.

4. The method according to claim 1, wherein the correlation of the measured data records from the x-ray picture and from the three-dimensional optical image is carried out by the provision of markers attached to the teeth.

5. The method according to claim 4, wherein the marker comprises a ball shaped body.

6. The method according to claim 1, wherein the measured data records of the three-dimensional measurement are converted to a pseudo-x-ray picture, assuming standard x-ray absorption values and the generation theory of the respective x-ray image.

7. The method according to claim 6, wherein the x-ray picture and the pseudo-x-ray picture are superimposed from several directions.

8. The method according to claim 7, wherein the x-ray picture comprises at least two individual panoramic images showing longitudinal and transverse sections of the jaw.

9. The method according to claim 1, wherein the drill assistance device is ground out from a dimension-stable material, and said material represents the form of occlusal surfaces of neighboring teeth as a negative with respect to an implant position.

10. The method according to claim 9, wherein the drill assistance device contains a bore hole position that serves as a guide for the drill.