Multi-Angle AR Interfaces for Dental Surgical Alignment
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Solution Overview
Problem
Augmented reality (AR) systems in surgery face issues such as parallax errors and occlusions due to tool or patient movement, and surgeons' inability to reference a screen and operative site simultaneously.
Innovation Solution
A system utilizing multiple AR interfaces positioned at different angles to overlay a spatial virtual surgical treatment plan (SVSTP) on a surgical site, exchanging coordinate information to prevent parallax and occlusion errors, allowing surgeons to guide surgical instruments without looking away.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a single AR interface is used to overlay the surgical treatment plan, then the surgeon can view virtual and real images simultaneously, but parallax errors and occlusions occur due to tool or patient movement
Solution Approach 1:
The system divides a single AR interface into multiple AR interfaces (first ARI, second ARI, etc.) positioned at different angles. Each ARI displays the surgical treatment plan from its specific viewpoint, allowing the surgeon to select the most appropriate view for each surgical step, thereby eliminating parallax errors and occlusions while maintaining complete visual information
Solution Approach 2:
The system adds the dimension of multiple viewing angles by positioning AR interfaces at different spatial orientations. This allows the surgical treatment plan to be displayed from various perspectives simultaneously, enabling the surgeon to eliminate parallax errors by selecting the optimal viewpoint for each surgical instrument alignment task
2Loss of information
If the surgeon references a screen to view the surgical plan, then detailed treatment information is available, but the surgeon cannot simultaneously observe the operative site
Solution Approach 1:
The system merges the surgical treatment plan display with the operative site view by overlaying virtual images onto the real surgical field through AR interfaces. The surgeon can view both the detailed treatment plan and the actual surgical site simultaneously through the same AR interface, eliminating the need to switch between screen and operative site observation
Solution Approach 2:
By providing multiple AR interfaces at different angles, the system allows the surgeon to segment the viewing experience - each ARI can be optimized for specific viewing needs (e.g., one for overall orientation, another for detailed alignment), enabling simultaneous access to both surgical plan information and operative site without compromising either
3Measurement precision
If multiple AR interfaces are positioned at different angles, then parallax and occlusion errors are reduced, but system complexity increases
Solution Approach 1:
Each AR interface is designed to be multi-functional, capable of displaying the surgical treatment plan from its specific angle and serving multiple surgical tasks. This universality reduces the need for highly specialized, complex interfaces for each specific function, simplifying the overall system while maintaining precision through multiple viewpoints
Data Source
AI summary
Systems and methods of the present disclosure relate to augmented reality (AR) assisted surgery. A system comprises a spatial virtual surgical treatment plan (SVSTP) for mixed or virtual reality; multiple AR interfaces (ARIs), each ARI configured to overlay the SVSTP onto a surgical site, wherein the ARIs are positioned at different angles to provide an unobstructed view of the surgical site and reduce parallax and occlusion errors during surgery, wherein the ARIs are configured to exchange coordinate and orientation information with each other such that the SVSTP viewed from each ARI is overlaid upon the surgical site and superimposed with each other to guide a surgical instrument.