Patient-Specific Surgical Guide for Glenoid Augment Production
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Solution Overview
Problem
During orthopedic shoulder arthroplasty, surgeons face challenges in accommodating deformed glenoids with standard implants, leading to complex intra-operative procedures and potential complications, especially for those less experienced, as they often need to create custom augments on the fly, which can compromise implant longevity and lead to unwanted complications.
Innovation Solution
A patient-specific surgical guide system that includes a base fixture and a customizable cutting guide to intra-operatively create a patient-specific augment, tailored to the individual's anatomy, allowing for precise shaping of an augment to fit between the bone and prosthetic implant, enabling a personalized fit and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a standard glenoid implant is used without customization, then the surgical procedure is simpler and faster, but the implant cannot accommodate deformed glenoids properly leading to compromised fit and longevity
Solution Approach 1:
The surgical guide is pre-customized based on patient-specific imaging and planning before surgery. The guide includes pre-designed cutting paths and augmentation surfaces that are calculated in advance to accommodate the patient's unique glenoid anatomy, eliminating the need for intra-operative customization while ensuring proper implant fit
Solution Approach 2:
A patient-specific surgical guide acts as an intermediary between the standardized implant and the unique patient anatomy. The guide translates the patient's 3D anatomical data into physical cutting instructions, enabling precise adaptation of the standard implant to accommodate deformed glenoids without requiring complex intra-operative modifications
2Reliability
If an intra-operative augment is created to accommodate deformed glenoid, then the implant can be properly fitted to unique anatomy, but the surgical complexity and time increase significantly
Solution Approach 1:
The augment design is predetermined through virtual surgical planning using patient imaging. The surgical guide includes pre-calculated cutting paths and augmentation geometries that are optimized before surgery, eliminating the need for real-time intra-operative augmentation creation and reducing surgical complexity
Solution Approach 2:
The surgical guide creates a physical copy of the patient's unique glenoid anatomy through 3D scanning and digital modeling. This digital twin is then used to generate the surgical guide's cutting surfaces, which replicate the patient's anatomical features without requiring complex intra-operative measurements or custom fabrication
3Reliability
If a patient-specific surgical guide is used to create custom augments, then the augment fit and implant longevity improve, but the manufacturing and setup time increase
Solution Approach 1:
The surgical guide is manufactured and prepared before surgery using pre-planned cutting paths derived from patient imaging. This advance preparation eliminates time-consuming intra-operative measurements and custom fabrication, allowing the guide to be ready for immediate use during the surgical procedure
Data Source
AI summary
A patient-specific surgical guide for intra-operatively producing a patient-specific augment and a method for producing same are provided. The method includes planning a patient-specific augment using obtained patient imagery of a bone adapted to receive a prosthesis to determine a size and shape of the patient-specific augment corresponding to the bone, creating a model of the patient-specific augment having the determined size and shape, and providing a patient-specific surgical guide having cutting guide surfaces which are customized in position and orientation and configured to guide a surgical implement to form the patient-specific augment corresponding to the 3D model. The patient-specific surgical guide is then used intra-operatively create the augment corresponding to the 3D model.