Method of orthopedic treatment

Patent metadata

Field	Value
Publication number	US-12471999-B2
Application number	US-202318236486-A
Country	US
Kind code	B2
Filing date	Aug 22, 2023
Priority date	Aug 23, 2022
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A method of orthopedic treatment includes steps of: by using a computer aided design (CAD) tool based on profile data that is related to a to-be-treated part of a bone of a patient, obtaining a model of a preliminary instrument that substantially fits the to-be-treated part; by using the CAD tool, obtaining a model of a patient specific instrument (PSI) based on the model of the preliminary instrument; producing the PSI based on the model of the PSI, the PSI being adjustable; performing medical operation on the to-be-treated part, and then attaching the PSI to the to-be-treated part; after attaching the PSI to the to-be-treated part, adjusting the PSI such that the PSI is adapted to real conditions of the to-be-treated part.

First claim

What is claimed is:

1 . A method of orthopedic treatment on a to-be-treated part of a bone of a patient, comprising steps of:
obtaining, by using a computer aided design (CAD) tool based on profile data that is related to the to-be-treated part, a model of a preliminary instrument that substantially fits the to-be-treated part; obtaining, by using the CAD tool, a model of a patient specific instrument (PSI) based on the model of the preliminary instrument, the model of the PSI being adjustable to adapt to real conditions of the to-be-treated part; producing the PSI based on the model of the PSI; performing medical operation on the to-be-treated part, and then attaching the PSI to the to-be-treated part; and after attaching the PSI to the to-be-treated part, adjusting the PSI such that the PSI is adapted to the real conditions of the to-be-treated part; before attaching the PSI to the to-be-treated part, placing a pressure sensor on the to-be-treated part to detect pressure, and obtaining a parameter that is related to the pressure, wherein the step of adjusting the PSI is to adjust the PSI based on the parameter; wherein: the orthopedic treatment is total knee arthroplasty (TKA), and the to-be-treated part is a medial femoral condyle of a femur, a lateral femoral condyle of the femur and a proximal tibia of a tibia of a lower limb of the patient; in the step of placing a pressure sensor is to place a flexible pressure sensor on the to-be-treated part to detect a first pressure related to the medial condyle and a second pressure related to the lateral condyle of the lower limb of the patient; the step of producing the PSI is to produce the PSI to include a frame having a plurality of through holes and at least one pin; the method further comprises, before the step of attaching the PSI to the to-be-treated part, steps of:
placing a first pad on the to-be-treated part such that the first pressure and the second pressure are balanced when the femur and the tibia of the lower limb of the patient are positioned in an extension state, and
placing a second pad on the to-be-treated part such that the first pressure and the second pressure are balanced when the femur and the tibia of the lower limb of the patient are positioned in a flexion state;
the step of adjusting the PSI includes selecting, based on the parameter that includes a thickness of the first pad and a thickness of the second pad, at least one of the through holes and inserting the at least one pin respectively into the at least one of the through holes, the at least one pin inserted into the at least one of the through holes being fastened to the to-be-treated part; and the method further comprises, after the step of adjusting the PSI, a step of mounting a cutting guide on the to-be-treated part according to a position of the at least one pin fastened to the to-be-treated part.

2 . The method as claimed in claim 1 , wherein the step of producing the PSI is to produce the PSI by using 3D printing techniques.

Assignees

• Chang Gung Memorial Hospital Linkou
• Univ Nat Taiwan Science & Technology

Inventors

• Chen Alvin Chao-Yu
• Chan Yi-Sheng
• Hsu Chi-Pin
• Lin Shang-Chih
• Wu Chin-Ju
• Jeng Jeng-Ywan

Classifications

• A61B2090/064

  for measuring force, pressure or mechanical tension · CPC title

• A61B2017/00526

  Methods of manufacturing · CPC title

• A61B2034/108

  Computer aided selection or customisation of medical implants or cutting guides · CPC title

• A61B2017/568

  produced with shape and dimensions specific for an individual patient · CPC title

• A61B2017/564

  Methods for bone or joint treatment · CPC title