# US 12,594,029 B2 · Implant stability sensor system and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,594,029 B2 - Document ID: US12594029B2 - Status: Granted - Kind: B2 - Application number: 18/790,455 - Filed: 2024-07-31 - Published: 2025-02-06 - Granted: 2026-04-07 - Earliest claimed: 2023-07-31 - Assignees: OrthoIQ, LLC - Applicants: OrthoIQ, LLC - Inventors: Donald Eugene Rea; Phillip Ormond Merritt; Sahil Kashyap; Alan Aaron Davidner; Randall Carl Danta; Kimberly Elasky - Web page: https://patentgrep.com/patent/US12594029B2 ## CPC - A61B 5/4851: {Prosthesis assessment or monitoring} - A61B 1/317: for bones or joints, e.g. osteoscopes or arthroscopes - A61B 5/0077: {Devices for viewing the surface of the body, e.g. camera, magnifying lens} - A61B 5/1127: {using markers} - A61B 5/4884: {inducing physiological or psychological stress, e.g. applications for stress testing} - A61B 5/686: {Permanently implanted devices, e.g. pacemakers, other stimulators, biochips (A61B5/6861 takes precedence)} - A61B 34/20: Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis - A61F 2/4657: {Measuring instruments used for implanting artificial joints (for surgical instruments A61B90/06)} - A61B 5/4887: {Locating particular structures in or on the body} - A61B 2034/2055: {Optical tracking systems} - A61B 2034/2065: {Tracking using image or pattern recognition} - A61B 2090/3916: {Bone tissue} - A61B 2090/3937: {Visible markers} - A61F 2002/4633: {for selection of endoprosthetic joints or for pre-operative planning} - A61F 2002/4666: {for measuring force, pressure or mechanical tension} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract A system for detecting motion between an implant and a bone that can optionally include: a bone locator means configured to be coupled to the bone, an implant attachment means configured to be coupled to the implant, and a data analysis means. The implant attachment means includes a detection means, and the implant attachment means defines one or more apertures or surfaces for receiving a force from a force inducing means. ## Claims ### Claim 1 A system for detecting motion between an implant and a bone, the system comprising: a bone locator configured to be coupled to the bone; an implant attachment configured to be coupled to the implant, wherein: the implant attachment comprises a detector, and the implant attachment defines one or more apertures or surfaces for receiving a force from a force inducer, wherein the detector includes a motion detector that is removably attached to the implant attachment and monitors the implant for movement between the bone and the implant when the implant is at rest and when the implant is under force; and a data analyzer for determining the motion between the implant and the bone when the implant is at rest and when the implant is under force. ### Claim 2 (depends on 1) The system of claim 1, wherein the bone locator comprises a marking pin configured to reside in a drilled hole in the bone. ### Claim 3 (depends on 1) The system of claim 1, wherein the motion detector comprises a machine vision camera configured to generate a plurality of images showing a location of the bone locator. ### Claim 4 (depends on 1) The system of claim 1, wherein the data analyzer comprises: a processor coupled to a memory and the motion detector, wherein the memory comprises computer-readable instructions stored thereon that, when executed by the processor, cause the processor to perform operations comprising: receiving, from the motion detector, a first image of the bone locator coupled to the bone; determining a first location of the bone locator in the first image of a field of view of the motion detector; receiving, from a sensor removably coupled to the implant attachment and communicatively coupled to the processor, force signals indicative of forces the force induced on the implant being coupled to the bone; receiving, from the motion detector, a second image of the bone locator coupled to the bone; determining a second location of the bone locator in the second image of the field of view of the motion detector; determining a relative motion between the implant and the bone based on a difference between the second location and the first location; and outputting an indication of implant movement based on the determined relative motion. ### Claim 5 (depends on 4) The system of claim 4, wherein the determining the first location of the bone locator in the first image occurs when the implant is at rest. ### Claim 6 (depends on 4) The system of claim 4, wherein the determining the second location of the bone locator in the second image occurs when the implant is under the force. ### Claim 7 (depends on 4) The system of claim 4, wherein the instructions, when executed by the processor, further cause the processor to perform the operations comprising outputting a measurement of implant stability. ### Claim 8 (depends on 7) The system of claim 7, wherein the instructions, when executed by the processor, further cause the processor to perform the operations comprising outputting a recommendation of whether the implant should be cemented or cementless. ### Claim 9 (depends on 8) The system of claim 8, wherein the outputting of the recommendation that the implant should be cemented occurs when the relative motion is determined to be more than about 50 microns; and wherein the outputting of the recommendation of that the implant should be cementless occurs when the relative motion is determined to be less than or equal to about 50 microns. ### Claim 10 (depends on 4) The system of claim 4, wherein the relative motion is determined to be either be more than about 50 microns or less than or equal to about 50 microns. ### Claim 11 A computer-implemented method of measuring implant stability, the method comprising: receiving, from a camera to recognize position of a bone locator in a field of view of the camera, a first image of the bone locator affixed to a bone, wherein the camera is removably attached to an implant; determining a first location of the bone locator in the first image of the field of view of the camera; receiving, from a sensor removably coupled to an implant attachment attached to the implant, force signals indicative of forces induced on an implant being coupled to the bone; receiving, from the camera, a second image of the bone locator affixed to the bone; determining a second location of the bone locator in the second image of the field of view of the camera; determining a relative motion between the implant and the bone based on a difference between the second location when the implant is under force and the first location when the implant is at rest; and outputting an indication of the implant stability based on the determined relative motion of the motion between the implant and the bone. ### Claim 12 (depends on 11) The method of claim 11, further comprising outputting the measurement of the implant stability. ### Claim 13 (depends on 12) The method of claim 12, further comprising outputting a recommendation of whether the implant should be cemented or cementless. ### Claim 14 (depends on 13) The method of claim 13, wherein the outputting of the recommendation that the implant should be cemented occurs when the relative motion is determined to be more than about 50 microns; and wherein the outputting of the recommendation of that the implant should be cementless occurs when the relative motion is determined to be less than or equal to about 50 microns. ### Claim 15 (depends on 11) The method of claim 11, wherein the relative motion is determined to be either be more than about 50 microns or less than or equal to about 50 microns. ### Claim 16 (depends on 11) The method of claim 11, wherein the camera comprises a machine vision camera. ### Claim 17 (depends on 11) The method of claim 11, wherein the sensor comprises a strain gauge. ### Claim 18 A non-transitory computer-readable medium comprising computer-readable instructions, wherein the computer-readable instructions, when executed by a processor, cause the processor to perform operations comprising: receiving, from a machine vision camera, a first image of a bone locator affixed to a bone; determining a first location of the bone locator in the first image of a field of view of the machine vision camera; receiving, from a sensor removably coupled to an implant attachment attached to the implant, force signals indicative of forces induced on an implant being coupled to the bone, wherein the machine vision camera is removably attached to the implant attachment, and the implant attachment receives a force from a force inducer driving the forces on the implant; receiving, from the machine vision camera, a second image of the bone locator affixed to the bone; determining a second location of the bone locator in the second image of the field of view of the machine vision camera; determining a relative motion between the implant and the bone based on a difference between the second location when the implant is under force and the first location when the implant is at rest; and outputting an indication of implant movement based on the determined relative motion. ### Claim 19 (depends on 18) The non-transitory computer-readable medium of claim 18, wherein the force inducer comprises the sensor. ### Claim 20 (depends on 18) The non-transitory computer-readable medium of claim 18, wherein the force inducer comprises a torque wrench.