Back-Drilling Ancillary with Grooved Reamer for Bone Housing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing back-drilling ancillaries for forming housing in bones are complex, expensive, and prone to component failures, particularly with movable blades and mechanisms, leading to unreliable bone recess formation during orthopedic surgeries like ligament reconstruction.
Innovation Solution
A simplified back-drilling ancillary with a cutting tool and integral rod, featuring a reamer with a longitudinal groove at the proximal end, allowing the cutting part to protrude and be fixed relative to the rod, reducing component count and enhancing reliability, and a guide pin for easy manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If movable blades and moving mechanisms are used in the back-drilling ancillary, then the cutting functionality is improved, but the device complexity increases and reliability decreases
Solution Approach 1:
The patent extracts the movable blades and moving mechanisms from the back-drilling ancillary, replacing them with a fixed cutting tool that has a cutting part mounted on the rod. This eliminates the complexity and reliability issues associated with movable components while maintaining the essential cutting functionality through the fixed cutting part that engages with the bone during the back-drilling operation.
2Adaptability or versatility
If movable blades and moving mechanisms are used in the back-drilling ancillary, then the cutting functionality is improved, but the manufacturing cost increases
Solution Approach 1:
By removing the movable blades and complex moving mechanisms, the patent significantly simplifies the manufacturing process. The fixed cutting tool with a cutting part mounted on the rod is much easier and less expensive to manufacture, eliminating the need for precision mechanisms and reducing assembly complexity.
3Reliability
If the cutting part protrudes out of the longitudinal groove when the rod is guided in the channel, then the reliability is improved, but the device structure becomes more specific
Solution Approach 1:
The cutting part is pre-positioned on the rod and configured to automatically protrude from the longitudinal groove when the rod is inserted into the reamer channel. This preliminary positioning ensures that the cutting part is ready for immediate use upon insertion, eliminating the need for deployment mechanisms and improving reliability through a simple, fail-safe design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a reliable, cost-effective, and efficient method for forming a recess in bones with fewer components, ensuring successful housing creation for graft placement during surgeries, minimizing tissue damage, and facilitating easy handling.
Implementation Method 1
a cutting part configured to cut bone so as to form the housing
Data Source
Figure 1~4
Figure 5~9
Figure 8~12
AI summary
This backdrilling ancillary (1) comprises: - a cutting tool (2) including a cutting portion (6) fixed relative to a stem (8), and - a reamer (4) having a channel configured to at least partially house and guide the stem (8) in translation along a longitudinal direction (X10). The reamer (4) has a longitudinal groove (12) opening onto the channel (10) and at a proximal end of the reamer (4), the cutting tool being introduced into the reamer through this proximal end. The cutting portion (6) protrudes from the longitudinal groove (12) when the stem (8) is guided in the channel along the longitudinal direction (X10). The invention can be applied to backdrilling a socket to house a graft during a ligament reconstruction or replacement operation, for example, for the knee.