Patient-Specific Acetabular Guide for Precise Bone Defect Preparation
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Solution Overview
Problem
Current methods for partial acetabular socket replacement lack precision and accuracy in preparing the acetabulum for implants, often resulting in suboptimal fit and excessive tissue removal, which can lead to complications and prolonged recovery times.
Innovation Solution
A patient-specific acetabular guide is designed preoperatively using medical scans to guide a cutting tool for precise removal of damaged tissue and preparation of a custom implantation slot, ensuring a precise fit for a patient-specific partial acetabular implant, utilizing computer-assisted image methods and biocompatible materials like metals and polymers for the guide and implant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used for partial acetabular socket replacement, then the surgical procedure can be performed, but precision and accuracy in preparing the acetabulum are insufficient, resulting in suboptimal fit and excessive tissue removal
Solution Approach 1:
The patent applies preliminary action by creating a patient-specific acetabular guide preoperatively using medical scans and computer-assisted image methods. The guide is custom-designed to match the patient's unique acetabulum anatomy before surgery, allowing precise pre-planning of the implantation slot location and dimensions. This preliminary customization ensures accurate tissue removal only where needed, preventing excessive tissue removal while maintaining high precision in acetabular preparation.
Solution Approach 2:
The patent uses copying by creating a physical acetabular guide that replicates the patient's unique acetabulum geometry. The guide is manufactured from medical scan data (CT scans, MRI scans, or X-rays) to create an exact anatomical copy, which then serves as a template during surgery. This copy allows the surgeon to precisely reproduce the correct implantation slot dimensions and orientation, ensuring optimal fit while minimizing unnecessary tissue removal.
2Manufacturing precision
If conventional methods are used for partial acetabular socket replacement, then the surgical procedure can be performed, but the fit of the implant is suboptimal
Solution Approach 1:
The patent applies preliminary action by performing complete preoperative planning before surgery. Medical scans are processed to create a 3D model of the patient's acetabulum, and the acetabular guide is designed and manufactured in advance. This preliminary preparation includes determining the exact location, size, and shape of the implantation slot, ensuring the implant will fit perfectly when installed. The guide is prepared with precise guiding formations that will guide the cutting tool to create the optimal implantation cavity.
Solution Approach 2:
The patent uses an intermediary approach by introducing the patient-specific acetabular guide as a mediator between the surgical procedure and the implant. The guide acts as a template that translates the planned implant design into precise physical measurements during surgery. It provides guiding formations that control the cutting tool's path and depth, ensuring the implantation slot matches the guide's precise dimensions. This intermediary device simplifies the surgical operation by providing clear, pre-determined guidance while ensuring optimal implant fit.
3Loss of time
If conventional methods are used for partial acetabular socket replacement, then the surgical procedure can be performed, but recovery times are prolonged
Solution Approach 1:
The patent applies local quality by customizing the acetabular guide to match the specific anatomical requirements of each patient's acetabulum. The guide is designed with precise guiding formations that create an implantation slot tailored to the patient's unique bone structure and defect location. This localized customization ensures that only the minimum necessary tissue is removed to accommodate the implant, preserving healthy tissue and reducing damage. The precise fit minimizes postoperative complications and accelerates healing, thereby shortening recovery time.
Solution Approach 2:
The patent applies preliminary action by completing all planning and guide preparation before surgery. The acetabular guide is manufactured in advance using medical scan data, eliminating the need for intraoperative measurements or adjustments. This preoperative preparation ensures the surgical procedure follows a precise, pre-planned path that minimizes tissue damage and maximizes implant fit. By avoiding intraoperative trial and error and unnecessary tissue removal, the procedure reduces harmful effects on the acetabulum and accelerates the patient's recovery process.
Data Source
AI summary
A device for partial acetabular replacement includes a patient-specific acetabular guide. The acetabular guide has a first surface configured to nestingly mate in only one position to the patient's acetabulum. The acetabular guide includes a patient-specific guiding formation configured to guide a cutting tool to remove damaged tissue from a defect of the patient's acetabulum and prepare a patient-specific implantation slot corresponding to the defect after removal of the damaged tissue. A patient-specific partial acetabular implant can be configured to nestingly mate with the patient-specific implantation slot.