Patient-Specific Bone Resection Guide with Modular Alignment
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Solution Overview
Problem
Current bone resection guides are not patient-specific, leading to lengthy positioning procedures and potential imprecision during bone resection surgeries, as they require adjustments to fit different patient anatomies, which can compromise surgical precision.
Innovation Solution
A bone resection guide with a patient-specific bone-facing surface and a resection alignment guide comprising guiding bores and slots, allowing for precise alignment and secure attachment to the bone, along with a method involving preoperative computer modeling to customize the guide for each patient's anatomy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a non patient-specific resection guide is used, then the device can be universally applied to different patients, but the positioning procedure becomes lengthy and precision is compromised
Solution Approach 1:
The resection guide is designed with pre-configured alignment features (alignment pins, alignment slots, and pre-formed bone-contact surfaces) that are prepared in advance during manufacturing. These features enable rapid positioning and secure attachment to the bone without requiring lengthy intraoperative adjustments, thus reducing positioning time while maintaining precision.
2Adaptability or versatility
If a non patient-specific resection guide is used, then the device can be universally applied to different patients, but the positioning procedure becomes lengthy and precision is compromised
Solution Approach 1:
The resection guide incorporates precise geometric copies of bone anatomy through 3D-printed or milled models that replicate the patient's specific bone geometry. The guide includes patient-specific alignment features (such as custom-shaped bone-contact surfaces and uniquely positioned alignment pins) that are created by copying the patient's bone morphology from preoperative imaging, ensuring accurate positioning and measurement precision for each patient.
3Measurement precision
If patient-specific adjustments are made to adapt the resection guide to each patient, then positioning precision is improved, but the complexity of the device and procedure increases
Solution Approach 1:
The resection guide is divided into modular components including a removable alignment guide section, interchangeable bone-contact surfaces, and separate fastening mechanisms. This segmentation allows the guide to be customized for each patient by simply replacing or reconfiguring specific modules rather than redesigning the entire device, thereby maintaining precision while reducing overall complexity and adjustment difficulty during the procedure.
4Productivity
If direct cutting of the bone is performed after positioning, then the resection can be performed, but the positioning procedure must be perfectly precise which increases the difficulty of the operation
Solution Approach 1:
The alignment guide features alignment pins that fit into corresponding alignment slots on the bone, and pre-formed recesses that receive bone-contact surfaces, creating a mechanical interlocking system. This preliminary mechanical engagement secures the guide to the bone before cutting begins, making the positioning process more straightforward and less difficult while ensuring perfect precision for the subsequent resection and improving overall productivity.
Data Source
AI summary
A bone resection guide for removal of a portion of a bone of a patient. The bone resection guide includes a resecting section and a drilling section. The resecting section has a bone-facing surface, an extension engaging surface, opposed to the bone-facing surface, and at least one resecting slot extending therethrough between the bone-facing surface and the extension engaging surface. The drilling section has a connecting surface, a tool engaging surface, opposed to the connecting surface, and a plurality of guiding bores extending therethrough from the tool engaging surface to the connecting surface. The drilling section is engageable with the resecting section with the connecting surface of the drilling section facing the extension engaging surface of the resecting section and the plurality of guiding bores being aligned with the at least one resecting slot when the drilling and resecting sections are engaged and secured together.