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Method for generating patient-specific implants

  • US 6,932,842 B1
  • Filed: 05/10/2000
  • Issued: 08/23/2005
  • Est. Priority Date: 05/11/1999
  • Status: Expired due to Fees
First Claim
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1. Method for manufacturing a patient-specific implant, comprising:

  • obtaining medical two-dimensional image data of a defect area in a patient requiring an implant and an environment thereof for a patient by a method selected from the group consisting of computer tomography (CT) and nuclear magnetic resonance (NMR) tomography;

    using a mathematical image processing algorithm to form a surface using the two-dimensional image data;

    performing a segmentation to detect bones and hard tissue ranges;

    generating a virtual three-dimensional model from the image data of at least the defect area in the patient requiring an implant and the environment thereof;

    comparing the virtual three-dimensional model to real medical reference data;

    selecting from the real medical reference data a set of said reference data best suited for the patient and forming a three-dimensional reference model object therefrom, the step of selecting the set of said reference data best suited for the patient and forming a reference model object therefrom comprising;

    first selecting a plurality of sets of the reference data and forming a corresponding plurality of three-dimensional reference model objects therefrom most resembling the patient considering mathematical, functional, medical and aesthetic parameters; and

    then selecting one of said plurality of three-dimensional reference model objects best suited for the patient;

    generating a virtual implant model from said selected one of said plurality of three-dimensional reference model objects by superimposing said selected one of said plurality of three-dimensional reference model objects with the virtual three-dimensional model; and

    manufacturing the implant by computer numeric control based on data from the virtual implant model.

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