# US 2026/0272601 A1 · System and method for augmented reality surgical planning and guidance with dynamic registration, bone resection visualization, and gap balancing

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- Number: US 2026/0272601 A1
- Document ID: US20260272601A1
- Status: Published application
- Kind: A1
- Application number: 19/430,227
- Filed: 2025-12-22
- Published: 2026-09-17
- Earliest claimed: 2024-12-22
- Assignees: Provision Surgical Inc.
- Applicants: Provision Surgical Inc.
- Inventors: ABDULLAH ADNAN BAHOUR; EN-HUA WANG; KEVIN WOO PARK; VINCENT MICHAEL CLAYTON; HENRY ROBERT BOUCHER; ABDURHMAN ADNAN BAHOUR
- Web page: https://patentgrep.com/patent/US20260272601A1

## CPC

- A61B 90/37: {Surgical systems with images on a monitor during operation}
- A61B 34/10: Computer-aided planning, simulation or modelling of surgical operations
- A61B 34/20: Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
- A61B 34/25: {User interfaces for surgical systems}
- A61B 90/36: {Image-producing devices or illumination devices not otherwise provided for}
- A61B 90/361: {Image-producing devices, e.g. surgical cameras}
- G06T 15/08: Volume rendering
- G06T 19/006: {Mixed reality (object pose determination, tracking or camera calibration for mixed reality G06T7/00)}
- G09B 9/00: Simulators for teaching or training purposes (for the use of weapons F41; computing aspects G06; {protocols for games, networked simulations or virtual reality H04L67/131})
- A61B 2034/101: {Computer-aided simulation of surgical operations}
- A61B 2034/102: {Modelling of surgical devices, implants or prosthesis}
- A61B 2034/104: {Modelling the effect of the tool, e.g. the effect of an implanted prosthesis or for predicting the effect of ablation or burring}
- A61B 2034/105: {Modelling of the patient, e.g. for ligaments or bones}
- A61B 2034/107: {Visualisation of planned trajectories or target regions}
- A61B 2034/108: {Computer aided selection or customisation of medical implants or cutting guides}
- A61B 2034/2048: {using an accelerometer or inertia sensor}
- A61B 2034/2051: {Electromagnetic tracking systems}
- A61B 2034/2055: {Optical tracking systems}
- A61B 2034/2057: {Details of tracking cameras}
- A61B 2034/2065: {Tracking using image or pattern recognition}
- A61B 2034/2068: {using pointers, e.g. pointers having reference marks for determining coordinates of body points}
- A61B 2034/2074: {Interface software}
- A61B 2034/252: {indicating steps of a surgical procedure}
- A61B 2034/254: {being adapted depending on the stage of the surgical procedure}
- A61B 2034/256: {having a database of accessory information, e.g. including context sensitive help or scientific articles}
- A61B 2034/258: {providing specific settings for specific users}
- A61B 2090/365: {augmented reality, i.e. correlating a live optical image with another image}
- A61B 2090/368: {changing the image on a display according to the operator's position}
- A61B 2090/371: {with simultaneous use of two cameras}
- A61B 2090/372: {Details of monitor hardware}
- A61B 2090/376: {using X-rays, e.g. fluoroscopy}
- A61B 2090/3762: {using computed tomography systems [CT]}
- A61B 2090/3983: {Reference marker arrangements for use with image guided surgery}
- G06T 2210/41: Medical
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G09B: EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS (devices for psychotechnics or for testing reaction times A61B5/16; games, sports, amusements A63; projectors, projector screens G03B)

## Abstract

A system for augmented reality surgical navigation may comprise an augmented reality surgical interface configured to be worn by a user and comprising a head-mounted display device with integrated cameras and sensors. A bone resection visualization module may generate real-time three-dimensional displays of resected areas and removed anatomy during surgical procedures. A gap balancing module may calculate flexion and extension gaps and provide automatic adjustment recommendations based on patient-specific biomechanical parameters. Imaging sensors may be positioned to monitor a surgical field and track changes in bone geometry during resection procedures. A processor may integrate visualization data from the bone resection visualization module and gap balancing calculations from the gap balancing module for coordinated display via the augmented reality surgical interface. The bone resection visualization module may generate volumetric representations of removed bone tissue with precise spatial positioning relative to remaining anatomical structures.

## Claims

### Claim 1

A system for augmented reality surgical navigation comprising:
an augmented reality surgical interface configured to be worn by a user and comprising a head-mounted display device with integrated cameras and sensors;
a bone resection visualization module configured to generate real-time three-dimensional displays of resected areas and removed anatomy during surgical procedures;
a gap balancing module configured to calculate flexion and extension gaps and provide automatic adjustment recommendations based on patient-specific biomechanical parameters;
imaging sensors positioned to monitor a surgical field and track changes in bone geometry during resection procedures; and
a processor configured to integrate visualization data from the bone resection visualization module and gap balancing calculations from the gap balancing module for coordinated display via the augmented reality surgical interface.

### Claim 2 (depends on 1)

The system of claim 1, wherein the bone resection visualization module is configured to generate volumetric representations of removed bone tissue with precise spatial positioning relative to remaining anatomical structures.

### Claim 3 (depends on 1)

The system of claim 1, wherein the gap balancing module incorporates force sensors configured to measure gap distances and ligament tension during joint manipulation.

### Claim 4 (depends on 1)

The system of claim 1, wherein the imaging sensors comprise depth cameras, structured light projectors, laser scanners, or combinations thereof.

### Claim 5 (depends on 1)

The system of claim 1, wherein the bone resection visualization module provides enhanced visibility controls allowing selective display of original anatomy, current bone state, removed tissue volumes, and planned resection guides.

### Claim 6 (depends on 1)

The system of claim 1, wherein the gap balancing module is configured to calculate optimal resection depths for femoral and tibial surfaces to achieve target gap measurements in both flexion and extension positions.

### Claim 7 (depends on 1)

The system of claim 1, wherein the processor is configured to provide real-time volume calculations quantifying bone tissue removed during procedures.

### Claim 8 (depends on 1)

The system of claim 1, wherein the augmented reality surgical interface supports multiple viewing modes comprising wireframe representations, solid surface rendering, and hybrid displays combining virtual and physical elements.

### Claim 9 (depends on 1)

The system of claim 1, wherein the gap balancing module is configured to model effects of different resection depths and angles on gap measurements and provide predictive analysis of proposed resection modifications.

### Claim 10 (depends on 1)

The system of claim 1, further comprising a surgical training module configured to provide immersive educational experiences using the integrated visualization and gap balancing capabilities.

### Claim 11

A method for augmented reality surgical navigation comprising:
displaying, via an augmented reality surgical interface worn by a user, real-time three-dimensional visualizations of a surgical field;
generating, via a bone resection visualization module, displays of resected areas and removed anatomy during surgical procedures;
calculating, via a gap balancing module, flexion and extension gaps based on patient-specific biomechanical parameters;
monitoring, via imaging sensors, the surgical field to track changes in bone geometry during resection procedures;
providing automatic adjustment recommendations based on the calculated gaps; and
integrating, via a processor, the visualization data and gap balancing calculations for coordinated display via the augmented reality surgical interface.

### Claim 12 (depends on 11)

The method of claim 11, further comprising generating volumetric representations of removed bone tissue with spatial positioning relative to remaining anatomical structures.

### Claim 13 (depends on 11)

The method of claim 11, further comprising measuring gap distances and ligament tension during joint manipulation using force sensors.

### Claim 14 (depends on 11)

The method of claim 11, further comprising providing enhanced visibility controls for selective display of original anatomy, current bone state, removed tissue volumes, and planned resection guides.

### Claim 15 (depends on 11)

The method of claim 11, further comprising calculating optimal resection depths for femoral and tibial surfaces to achieve target gap measurements in both flexion and extension positions.

### Claim 16 (depends on 11)

The method of claim 11, further comprising providing real-time volume calculations quantifying bone tissue removed during procedures.

### Claim 17 (depends on 11)

The method of claim 11, further comprising modeling effects of different resection depths and angles on gap measurements and providing predictive analysis of proposed resection modifications.

### Claim 18

A non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to:
control an augmented reality surgical interface to display real-time three-dimensional visualizations of a surgical field;
generate, via a bone resection visualization module, displays of resected areas and removed anatomy during surgical procedures;
calculate, via a gap balancing module, flexion and extension gaps based on patient-specific biomechanical parameters;
process data from imaging sensors monitoring the surgical field to track changes in bone geometry during resection procedures;
provide automatic adjustment recommendations based on the calculated gaps; and
integrate the visualization data and gap balancing calculations for coordinated display via the augmented reality surgical interface.

### Claim 19 (depends on 18)

The non-transitory computer-readable medium of claim 18, wherein the instructions further cause the processor to generate volumetric representations of removed bone tissue with spatial positioning relative to remaining anatomical structures.

### Claim 20 (depends on 18)

The non-transitory computer-readable medium of claim 18, wherein the instructions further cause the processor to calculate optimal resection depths for femoral and tibial surfaces to achieve target gap measurements in both flexion and extension positions.