Implant installation strength evaluation method, implant installation strength evaluation device, and program

Patent metadata

Field	Value
Publication number	US-11737705-B2
Application number	US-201816647069-A
Country	US
Kind code	B2
Filing date	Sep 13, 2018
Priority date	Sep 14, 2017
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

An implant installation strength evaluation method includes a step of vibrating an implant, a step of measuring time series data of the number of vibrations and vibration strengths of the implant vibrated in the vibrating step, and a step of deriving information indicating an index of an installation strength of the implant based on the time series data of the number of vibrations and vibration strengths of the implant.

First claim

The invention claimed is:

1. An implant installation strength evaluation method comprising:
a step of vibrating an implant when the implant is irradiated with a laser beam;
a step of measuring time series data of the number of vibrations and vibration strengths of the implant vibrated in the vibrating step; and
a step of deriving information indicating an index of an installation strength of the implant based on the time series data of the number of vibrations and the vibration strengths of the implant.

2. The implant installation strength evaluation method according to claim 1 further comprising:
a step of acquiring an evaluation result of the installation strength of the implant based on the information indicating the index of the installation strength.

3. The implant installation strength evaluation method according to claim 1 ,
wherein in the deriving step, a relationship between a frequency, the number of vibrations, and a vibration strength is obtained based on the time series data of the number of vibrations and the vibration strengths of the implant; a frequency corresponding to a predetermined number of vibrations and a predetermined vibration strength is obtained from the obtained relationship between a frequency, the number of vibrations, and a vibration strength; and the information indicating the index of the installation strength of the implant associated with the obtained frequency is obtained from association between the frequency and the information indicating the index of the installation strength of the implant.

4. The implant installation strength evaluation method according to claim 1 ,
wherein at least one of the steps is controlled and executed by a computer.

5. The implant installation strength evaluation method according to claim 3 ,
wherein the information indicating the index of the installation strength of the implant is an embedding torque indicating a resistance generated in a bone when the implant is embedded in the bone.

6. The implant installation strength evaluation method according to claim 3 ,
wherein the information indicating the index of the installation strength of the implant is a pulling force that is a force acting when an artificial joint cup is detached from a bone in a case in which an installation rod is attached to the artificial joint cup attached to the bone and the installation rod is pulled.

7. The implant installation strength evaluation method according to claim 1 ,
wherein in the measuring step, the time series data of the number of vibrations and vibration strengths of the implant vibrated in the vibrating step is measured using an acceleration sensor.

8. The implant installation strength evaluation method according to claim 1 ,
wherein in the measuring step, the time series data of the number of vibrations and vibration strengths of the implant vibrated in the vibrating step is measured based on a generated sound.

9. The implant installation strength evaluation method according to claim 1 ,
wherein in the vibrating step, the implant is vibrated when the implant is irradiated with a first laser beam, and
wherein in the measuring step, the implant is irradiated with a second laser beam, and the time series data of the number of vibrations and vibration strengths of the implant is measured based on the second laser beam reflected by the implant.

10. The implant installation strength evaluation method according to claim 1 ,
wherein in the vibrating step, the implant is vibrated by applying a water stream to the implant, and
wherein in the measuring step, the time series data of vibration strengths of the implant is measured by applying a water stream to the implant based on a generated sound.

11. The implant installation strength evaluation method according to claim 1
wherein the measuring step is executed by an implant installation strength evaluation device and is executed in a non-contact manner utilizing a laser beam.

12. An implant installation strength evaluation device acquiring data using the implant installation strength evaluation method according to claim 1 , the device comprising:
a vibration induction unit that vibrates an implant when the implant is irradiated with a laser beam;
a measurement unit that measures time series data of the number of vibrations and vibration strengths of the implant vibrated by the vibration induction unit; and
a deriving unit that derives information indicating an index of an installation strength of the implant based on the time series data of the number of vibrations and the vibration strengths of the implant measured by the measurement unit.

13. An implant installation strength evaluation device according to claim 12 , wherein the measurement unit performs an action in a non-contact manner utilizing a laser beam.

14. A program for acquiring data using the implant installation strength evaluation device according to claim 12 by causing a computer to execute
a step of vibrating an implant when the implant is irradiated with a laser beam,
a step of measuring time series data of the number of vibrations and vibration strengths of the implant vibrated in the vibrating step, and
a step of deriving information indicating an index of an installation strength of the implant based on the time series data of the number of vibrations and the vibration strengths of the implant,
wherein both or any one of the vibrating step and the measuring step is executed in a non-contact manner utilizing a laser beam.

15. The implant installation strength evaluation method according to claim 1 , wherein irradiation energy of the laser beam be set within a range of 1 mJ to 50 mJ.

16. The implant installation strength evaluation method according to claim 1 , wherein the distance between the implant and the tip of the optical fiber that irradiates the laser beam is set within a range of 10 mm to 50 mm when a condensing optical element is mounted at the tip of the optical fiber.

17. The implant installation strength evaluation method according to claim 1 , wherein the distance between the implant and the tip of the optical fiber that irradiates the laser beam is set within a range of 0.1 mm to 2 mm.

Assignees

• Univ Keio
• National Institutes For Quantum And Radiological Science And Tech

Inventors

• Nakashima Daisuke
• Nagura Takeo
• Nishikino Masaharu
• Hasegawa Noboru
• Mikami Katsuhiro
• Kitamura Toshiyuki
• Kondo Shuji
• Okada Hajime
• Shimada Yoshinori

Classifications

• A61B5/4851 Primary

  Prosthesis assessment or monitoring · CPC title

• A61B5/0051

  by applying vibrations · CPC title

• A61B5/0088

  for oral or dental tissue · CPC title

• A61C8/009

  for selecting the right implanting element, e.g. templates · CPC title

• A61F2/4657

  Measuring instruments used for implanting artificial joints (for surgical instruments A61B90/06) · CPC title