Bone cutting method for alignment relative to a mechanical axis

a technology of mechanical axis and bone cutting, which is applied in the field of medical and surgical procedures, can solve the problems of inability to predict the longevity of the prosthesis, the inability to accurately determine the orientation of the implant, and the cycle of trial and error of the orthopaedic alignment currently involved, and achieves the effects of improving the patient's comfort, reducing the risk of fracture, and improving the quality of li

Inactive Publication Date: 2014-09-18
ORTHOSENSOR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Orthopedic alignment currently involves cycles of trial and error.
Even with mechanical jigs, trialing, and advanced prosthetic components, outcomes including functional efficacy, patient comfort, and longevity of the prosthesis may not always be highly predictable, especially if procedures are performed by physicians and surgeons with different levels of skill, experience, and frequency of repeating an individual procedure.
Accurately determining and aligning an implant orientation is a difficult process requiring expensive equipment.

Method used

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  • Bone cutting method for alignment relative to a mechanical axis
  • Bone cutting method for alignment relative to a mechanical axis
  • Bone cutting method for alignment relative to a mechanical axis

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Embodiment Construction

[0080]The following description of embodiment(s) is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0081]For simplicity and clarity of the illustration(s), elements in the figures are not necessarily to scale, are only schematic and are non-limiting, and the same reference numbers in different figures denote the same elements, unless stated otherwise. Additionally, descriptions and details of well-known steps and elements are omitted for simplicity of the description. Notice that once an item is defined in one figure, it may not be discussed or further defined in the following figures.

[0082]It will be appreciated by those skilled in the art that the words “during”, “while”, and “when” as used herein relating to circuit operation are not exact terms that mean an action takes place instantly upon an initiating action but that there may be some small but reasonable delay, such as a propagation delay, between the reaction that is...

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Abstract

A method is disclosed herein for aligning a bone cutting jig for a bone cut relative to a mechanical axis. The method utilizes a three-axis accelerometer in a device to measure position, rotation, and tilt. The device is coupled to a bone-cutting jig. The bone-cutting jig is coupled to a bone. A joint of the bone is placed in a predetermined flexion. The joint end of the bone is rotated between a first point and a second point. As the joint rotates it pivots off a pivot point related to the mechanical axis. The joint rotation is monitored on a remote system. The device transmits data related to an arc made by the joint as it is rotated. The alignment of the bone relative to the mechanical axis is calculated from the three-axis accelerometer data. The bone-cutting jig is positioned to cut the bone based on the alignment measurement.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. provisional patent application No. 61 / 803,078 filed 18 Mar. 2013. The disclosure of which is incorporated herein by reference in its entirety.FIELD OF THE INVENTION[0002]The invention relates in general to medical and surgical procedures and more particularly to aligning medical devices to precise locations on or within a patient's body.BACKGROUND OF THE INVENTION[0003]Orthopedic alignment currently involves cycles of trial and error. For example, leg alignment requires a technique that approximates alignment in which the surgeon makes one of the distal femoral cut and the proximal tibial cut based on experience, mechanical jigs, and visual alignment. Typically, the proximal tibial cut is made so as to remove the least amount of the proximal tibia, while ensuring sufficient removal of diseased or otherwise undesirable bone. The remaining femoral cuts are made to complete shaping of the femur to ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B17/17A61F2/46
CPCA61F2/461A61B17/1764A61B5/1072A61B5/4571A61B5/4585A61B5/4887A61F2/38A61F2/4684A61B17/155A61B17/157A61B2034/104A61B5/1036A61B34/20A61B90/37A61B5/1121A61B5/4528A61B5/4851A61F2/4657A61B5/686A61B17/154A61B34/25A61F2002/4668A61F2002/4658A61B5/45A61B5/103A61F2/3836A61B34/10A61B2034/102A61B2034/105G06F3/0481
Inventor STEIN, MARCROCHE, MARTIN
Owner ORTHOSENSOR
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