Bone Anchor Receiving Part for Multi-Instrument Attachment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing receiving parts for bone anchoring devices lack versatility in accommodating different instruments, leading to interference during attachment and increased inventory costs.
Innovation Solution
A receiving part with a U-shaped recess and circumferential grooves and recesses at the same axial height, allowing safe and reproducible attachment of different instruments, reducing interference and inventory costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a receiving part is designed with a single engagement structure for one specific instrument, then the attachment is simple and reliable, but the versatility to accommodate different instruments is limited
Solution Approach 1:
The receiving part is designed with multiple engagement structures (first circumferential groove, second circumferential groove, and circumferential recess) that can accommodate different instrument types. Each structure is optimized for specific instrument geometries, allowing a single receiving part to universally engage various instruments without requiring multiple specialized receiving parts
Solution Approach 2:
The engagement structure is divided into multiple independent circumferential features (grooves and recesses) positioned at different axial heights. Each segment can independently engage with corresponding features on different instruments, allowing selective engagement based on instrument type while maintaining overall structural integrity
2Adaptability or versatility
If multiple engagement structures are provided at different axial heights, then different instruments can be accommodated, but interference between structures may occur during attachment
Solution Approach 1:
Each circumferential engagement structure (first groove, second groove, recess) is positioned at a specific axial height and has locally optimized dimensions and shapes tailored to specific instrument types. This local customization ensures that each structure engages its corresponding instrument feature without interfering with other structures, as each location is optimized for its specific function
3Quantity of substance
If different instruments are supported with the same receiving part, then inventory costs are reduced, but the attachment position reproducibility may be compromised
Solution Approach 1:
The receiving part is pre-configured with multiple circumferential engagement structures at predetermined axial heights, each designed to receive specific instrument features. This preliminary arrangement ensures that when instruments are attached, they automatically engage at the correct axial positions, maintaining reproducible attachment positions across different instrument types without requiring complex adjustment procedures
Data Source
Figure 1~2
Figure 3~7
Figure 8~11
AI summary
A receiving part of a bone anchoring device comprises a first end (5a), a second end (5b) opposite to the first end (5a), a central axis (C) extending through the first end (5a) and the second end (5b), and a substantially U-shaped-recess (54) adjacent to the first end (5a) for receiving a rod (10), wherein the substantially U-shaped recess (54) forms two free legs (55a, 55b). A circumferential groove (57a, 57b) is provided in an outer surface (56) of at least one of the legs (55a, 55b), the groove (57a, 57b) being delimited in the direction of the central axis (C) by an upper surface (571) and a lower surface (572), and a recess (58a, 58b) is provided in the outer surface (56) of the at least one leg, the recess (58a, 58b) being delimited in the direction of the central axis (C) by an upper surface (581) and a lower surface (582). At the outer surface (56) of the receiving part (5), the lower surface (582) of the recess (58a, 58b) and the lower surface (572) of the groove (57a, 57b) are provided at substantially the same distance (d1) from the first end (5a) of the receiving part (5).