Patient-Specific Guide Establishing Alpha Plane for Bone Preparation
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Solution Overview
Problem
Current methods for preparing bone for joint replacement surgeries are challenging due to difficulties in accurately exposing the bone and tissue, leading to errors in executing surgical procedures, especially for low-volume surgeons, as they rely on hand-guided tools and direct intraoperative vision without a reliable reference plane.
Innovation Solution
A method and system that utilize a patient-specific guide to establish a static Alpha plane by placing pins in the bone, allowing surgical tools to reference this plane for precise bone preparation, using optical arrays to correlate the cutting tool's position and execute a preoperative plan for optimal implant placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hand-guided tools and direct intraoperative vision are used for bone preparation, then surgeon control and flexibility are maintained, but surgical accuracy and precision deteriorate due to lack of reliable reference plane
Solution Approach 1:
A patient-specific guide is designed and manufactured before surgery based on preoperative imaging data. This guide incorporates pre-determined bore locations and orientations that correspond to optimal pin placement for establishing the Alpha plane, eliminating the need for complex intraoperative measurements and reference system setup while ensuring accurate bone preparation.
2Measurement precision
If multiple pins and complex reference systems are used to establish alignment, then measurement accuracy improves, but device complexity and surgical time increase
Solution Approach 1:
The invention extracts and eliminates unnecessary components from traditional alignment systems. Instead of using multiple pins and complex reference systems, the patient-specific guide directly establishes the Alpha plane through strategically positioned bores that accept pins in predetermined locations and orientations, simplifying the instrumentation while maintaining alignment accuracy.
3Reliability
If traditional bone preparation methods are used, then surgical flexibility is maintained, but errors increase due to difficulty in accurately exposing bone and tissue
Solution Approach 1:
The patient-specific guide acts as an intermediary device between the surgeon and the bone. It provides a stable, pre-planned reference framework that guides pin placement and bone preparation, reducing surgical errors by eliminating the need for complex intraoperative measurements and reference system setup while maintaining surgical flexibility.
Data Source
AI summary
A method of performing arthroplasty of an anatomical joint for receipt of an implant is disclosed. The method includes developing a preoperative plan, designing a patient specific guide based on the preoperative plan, obtaining the patient specific guide, placing the patient specific guide relative to the identified bone, fixing a pair of pins into the bone to establish an Alpha plane and executing the preoperative plan while referencing the Alpha plane. A desired amount of remaining first bone is determined based on a condition of the anatomical joint and a desired orientation of the implant. The patient specific guide includes a pair of bores defined therein and located in positions to accept a complementary pair of pins. The bores are arranged at locations on the patient specific guide to orient the respective pins in a direction optimized for surgeon access to the first bone and to establish the Alpha plane.