Surgical Bone Preparation Instrument with Single-Hand Depth Control
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Solution Overview
Problem
Current surgical bone preparation techniques require additional instruments to ensure precise reaming depth during bone preparation for surgical articulation replacement operations, which can be cumbersome and inefficient.
Innovation Solution
A surgical bone preparation instrument featuring a cutting depth control ring that is adjustable by a single hand, allowing for precise control of reaming depth through a simple blocking mechanism, eliminating the need for additional instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a stop member mounted on a reaming instrument is used to control reaming depth, then reaming depth control is achieved, but additional instruments or components are required increasing device complexity
Solution Approach 1:
The patent combines the depth control function directly into the reaming instrument by integrating a control ring with an abutment surface that limits the stroke of the reaming head. This merging of functions eliminates the need for separate stop members or additional instruments, thereby maintaining precise reaming depth control while reducing overall device complexity
Solution Approach 2:
The reaming instrument is designed to be self-regulating through the control ring mechanism that automatically limits the reaming depth based on the abutment between the control ring and the reference surface on the bone. The instrument controls itself without requiring external devices or complex adjustment mechanisms
2Manufacturing precision
If multiple instruments are used to ensure precise reaming depth, then reaming depth accuracy is improved, but ease of operation deteriorates due to cumbersome procedures
Solution Approach 1:
By integrating the depth control function directly into the reaming instrument through the control ring and abutment surface mechanism, the patent eliminates the need for multiple separate instruments. This single integrated tool maintains precise depth accuracy while significantly improving ease of operation by reducing the number of components the surgeon must manage
3Manufacturing precision
If a control mechanism limiting relative translation of main body and sliding body is implemented, then reaming depth control is achieved, but device complexity increases
Solution Approach 1:
The control ring with abutment surface creates a self-limiting mechanism where the geometry of the control ring itself defines the maximum travel distance of the sliding body relative to the main body. This self-service approach achieves precise cutting depth control through simple geometric constraints rather than complex active control systems
Solution Approach 2:
The control ring is pre-configured with a specific abutment surface geometry that determines the desired cutting depth before the reaming operation begins. This preliminary configuration eliminates the need for complex real-time control mechanisms during the procedure
Data Source
AI summary
This surgical bone preparation instrument (1) comprises a main body (5) terminated by a contacting surface (50) adapted to abut on a bone (B), and a sliding body (7) equipped with a cutting element (3) and which is movable in translation with respect to the main body (5). The bone preparation instrument (1) includes a cutting depth control ring (11) that is adjustable by a single hand, which forms an abutment surface (110) against the movement of one of the main body (5) and the sliding body (7) when the sliding body (7) reaches an adjusted cutting depth (D) corresponding to an adjustment position of the control ring (11).