3D Shoulder Planning With Scapulothoracic Kinematics
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Solution Overview
Problem
Existing surgical planning systems fail to adequately account for the scapulothoracic joint kinematics in determining the range of motion and positioning of implants during orthopedic procedures, leading to suboptimal surgical outcomes.
Innovation Solution
A surgical planning system that utilizes three-dimensional bone models of the humerus, scapula, and thorax to determine the scapulothoracic contribution to the shoulder joint's range of motion, incorporating humeroscapular and scapulothoracic movements to establish a surgical plan, and includes a planning environment to position implants relative to the shoulder joint model, determining a numerical relationship between these contributions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional surgical planning systems are used that focus only on the shoulder joint, then the surgical planning process is simpler and faster, but the accuracy of range of motion determination is insufficient
Solution Approach 1:
The surgical planning system divides the kinematic analysis into two distinct segments: humeroscapular movement (shoulder joint) and scapulothoracic movement (scapula relative to thorax). This segmentation allows the system to independently model and analyze each joint's contribution to overall shoulder range of motion, improving measurement precision while managing complexity through modular analysis
Solution Approach 2:
The system transitions from traditional two-dimensional shoulder joint analysis to three-dimensional kinematic modeling that incorporates the scapulothoracic joint. By adding this spatial dimension and considering the scapula's movement relative to the thorax, the system achieves more accurate range of motion determination without excessive complexity increase
2Manufacturing precision
If implant positioning is determined without considering scapulothoracic kinematics, then the surgical planning process is more straightforward, but implant positioning accuracy is suboptimal
Solution Approach 1:
The system performs preliminary kinematic analysis of both humeroscapular and scapulothoracic movements before finalizing implant positioning. By pre-calculating the combined range of motion contributions and identifying optimal implant positions that accommodate both joint movements, the system achieves accurate implant positioning while managing complexity through advance planning
Solution Approach 2:
The system creates virtual three-dimensional models (copies) of the patient's humerus, scapula, and thorax based on imaging data. These digital copies allow for iterative positioning and testing of implant configurations in the virtual model before final surgical execution, improving positioning accuracy while reducing the complexity of physical trial-and-error procedures
3Reliability
If the surgical plan does not account for scapulothoracic movement, then planning time is reduced, but surgical outcomes are suboptimal
Solution Approach 1:
The system replaces manual, experience-based surgical planning with automated computer-based kinematic analysis. The computational system automatically calculates humeroscapular and scapulothoracic movement contributions and determines optimal implant positioning, improving surgical outcome reliability while reducing the time burden on surgeons by automating complex calculations
Data Source
AI summary
Improved surgical planning systems and methods are provided for planning orthopaedic procedures, including pre-operatively, intra-operatively, and/or post-operatively to create, edit, execute, and/or review surgical plans. The surgical planning systems and methods may be utilized for planning and implementing orthopaedic procedures to restore functionality to a joint. A scapulothoracic contribution to a range of motion may be determined. Range of motion simulations may be performed on a shoulder joint based on the scapulothoracic contribution.