US 12,226,108 B2Granted

Arthroplasty balance and gap gauge and cutting guidance

AssigneeOptimotion Implants LLC

InventorsVuong Binh Nguyen, Dinesh V. Koka

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Abstract

A gap gauge is disclosed for facilitating an arthroplasty procedure on a first bone and a second bone of a patient. The gap gauge may include a first plate positionable in contact with the first bone, a second plate positionable in contact with the second bone. The second plate may be displaced from the first plate by a displacement. The gap gauge may further include a separator connected to the first plate and the second plate, a separation indicator coupled to the separator and configured to indicate the displacement, and a balance indicator connected to at least one of the first plate and the second plate. The balance indicator may indicate a balance status between the first plate and the second plate. The separator can be actuated to adjust the displacement.

Claims4

Dependent claims

A method for measuring a gap between a femur and a tibia of a patient, the method comprising:

inserting a first plate and a second plate of a gap gauge between the femur and the tibia;
actuating the first plate and the second plate apart such that the first plate is in contact with a resected surface of the femur and the second plate is in contact with a resected surface of the tibia;
reading a separation indicator of the gap gauge to obtain a displacement between the femur and the tibia;
reading a balance indicator of the gap gauge to obtain a balance status between the femur and the tibia;
and
adjusting a tension applied to the femur and the tibia by one or more of a medial collateral ligament and a lateral collateral ligament;
and
reading the balance indicator of the gap gauge to obtain an adjusted balance status between the femur and the tibia in response to adjusting the tension;
wherein adjusting the tension further comprises:
removing the gap gauge from between the femur and the tibia;
resecting one or more of the resected surface of the femur and the resected surface of the tibia;
re-inserting the first plate and the second plate of the gap gauge between the femur and the tibia;
actuating the first plate and the second plate apart such that the first plate is in contact with the resected surface of the femur and the second plate is in contact with the resected surface of the tibia;
reading the separation indicator of the gap gauge to obtain the displacement between the femur and the tibia;
and
reading the balance indicator of the gap gauge to obtain the balance status between the femur and the tibia.

13 more elements

A method for measuring and correcting imbalance for an arthroplasty procedure on a femur and a tibia of a patient, the method comprising:

inserting a first plate and a second plate of a gap gauge between the femur and the tibia of a knee joint of a patient;
actuating the first plate and the second plate apart such that the first plate is in contact with a resected surface of the femur and the second plate is in contact with a resected surface of the tibia;
reading a balance indicator of the gap gauge to obtain a balance status between the femur and the tibia;
inserting a first pin through a pin guide of the gap gauge;
securing the first pin to one of the femur and the tibia;
coupling a cutting guide to the one of the femur and the tibia using the first pin;
and
using the cutting guide to guide resection of one of the femur and the tibia to counter a nonparallel orientation of the first plate relative to the second plate;
and
adjusting a tension applied to the femur and the tibia by one or more of a medial collateral ligament and a lateral collateral ligament;
and
reading the balance indicator of the gap gauge to obtain an adjusted balance status between the femur and the tibia in response to adjusting the tension;
wherein adjusting the tension further comprises:
removing the gap gauge from between the femur and the tibia;
resecting one or more of the resected surface of the femur and the resected surface of the tibia;
re-inserting the first plate and the second plate of the gap gauge between the femur and the tibia;
actuating the first plate and the second plate apart such that the first plate is in contact with the resected surface of the femur and the second plate is in contact with the resected surface of the tibia;
reading a separation indicator of the gap gauge to obtain a displacement between the femur and the tibia;
and
reading the balance indicator of the gap gauge to obtain the balance status between the femur and the tibia.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/239,824Filed 30 Aug 2023 · continuation
Priority: 11 Jun 2021
Published: US 2023/0404597 A121 Dec 2023
Granted: 18 Feb 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

A61B 17/157
For preparing bone for knee prosthesis: cutting tibia
A61B 17/1764
Specially adapted for particular parts of the body: for the knee
A61B 17/025
For holding wounds open, e.g. retractors; Tractors: joint distractors
A61B 17/155
For preparing bone for knee prosthesis: cutting femur

Family

Application17/345,257Parent of this continuation · filed 11 Jun 2021
US 2023/0404597 A1Pre-grant publication · published 21 Dec 2023
US 11,751,884 B2Parent of this continuation
US 2022/0395282 A1Published application
US 12,226,108 B2This patent

From the US filing history. Foreign family members aren’t listed.