Method and device for determining the contour of a recess in a piece of material
First Claim
1. Method for determining the contour of a recess in a piece of material, which is worked into the material by means of a tool, in particular in a piece of bone, wherein the position of the piece of material in space is established by a navigation system, the position of the tool in space is established by a navigation system, the respective position of the tool in relation to the piece of material is determined from the position data obtained in this manner, during the machining of the piece of material with the tool, the relative positions of the tool in relation to the piece of material are stored and the prepared contour on the piece of material is determined from extreme values of these relative positions with respect to a fixed reference position of the piece of material.
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0 Petitions
Accused Products
Abstract
To enable the contour of a recess in a piece of material, which is worked into the material by means of a tool, in particular in a piece of bone, to also be determined without a direct view of the machining region with a method for determining this contour, it is proposed that the position of the piece of material in space is established by a navigation system, that the position of the tool in space is established by a navigation system, that the respective position of the tool in relation to the piece of material is determined from the position data obtained in this manner, that during the machining of the piece of material with the tool, the relative positions of the tool in relation to the piece of material are stored and that the prepared contour on the piece of material is determined from extreme values of these relative positions with respect to a fixed reference position of the piece of material. A device for performing this method is also specified.
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Citations
18 Claims
- 1. Method for determining the contour of a recess in a piece of material, which is worked into the material by means of a tool, in particular in a piece of bone, wherein the position of the piece of material in space is established by a navigation system, the position of the tool in space is established by a navigation system, the respective position of the tool in relation to the piece of material is determined from the position data obtained in this manner, during the machining of the piece of material with the tool, the relative positions of the tool in relation to the piece of material are stored and the prepared contour on the piece of material is determined from extreme values of these relative positions with respect to a fixed reference position of the piece of material.
- 10. Device for determining the contour of a recess in a piece of material with a tool for working the contour into the piece of material, wherein the piece of material and the tool are respectively firmly connected to a marking element a stationary navigation system is provided, which establishes the position of the two marking elements and thus the position of the piece of material and the tool in space, an arithmetic unit with memory is provided, which from the position data obtained in this manner determines the respective position of the tool in relation to the piece of material, stores the relative positions of the tool in relation to the piece of material during machining of the piece of material by the tool, and determines the prepared contour on the piece of material from extreme values of these relative positions with respect to a fixed reference position of the piece of material.
Specification