Helix Flute Bone Cleaning Tool for Spine Fusion
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Solution Overview
Problem
Current bone cleaning tools are inefficient and often result in incomplete or inadequate bone graft preparation, leading to delayed fusion or healing, pseudoarthrosis, and loss of usable bone material due to their inability to effectively remove soft tissue without damaging the bone or generating excessive heat.
Innovation Solution
A bone cleaning tool with a double or triple helix flute design and specialized cutting surfaces, spines, and apertures that can be used with a high-speed surgical drill to efficiently remove soft tissue from bone without significant bone loss, incorporating features for improved control and debris retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual scraping tools (periosteal elevators, curettes, rongeurs) are used to remove soft tissue from bone, then soft tissue removal can be achieved, but the process is tedious, time-consuming, and results in incomplete bone preparation
Solution Approach 1:
The patent replaces manual mechanical scraping tools with a powered rotary bone cleaning tool that uses rotational motion to remove soft tissue. The tool incorporates a rotary head with cutting surfaces that spin at controlled speeds to efficiently debride bone surfaces, eliminating the need for tedious manual scraping with curettes and rongeurs while achieving more complete tissue removal.
Solution Approach 2:
The invention changes the operational parameters by introducing controlled rotational speed and torque to the bone cleaning process. The powered tool allows adjustment of rotation speed and applies consistent mechanical force through the rotary mechanism, whereas manual tools rely on variable surgeon-applied force. This parameter control improves efficiency and consistency of bone preparation.
2Productivity
If high-speed drilling is used to remove soft tissue from bone, then cleaning speed increases, but excessive heat is generated causing bone damage
Solution Approach 1:
The patent introduces cooling mechanisms as an intermediary system to manage heat generation during high-speed bone cleaning. The rotary tool incorporates features such as cooling channels or contact with cool irrigation fluids that act as intermediaries between the hot rotating cutting surfaces and the bone, dissipating heat and preventing thermal damage while allowing sustained high-speed operation.
Solution Approach 2:
The invention employs periodic cooling intervals or pulsating irrigation during the continuous rotary cleaning process. The cooling action is applied periodically to interrupt heat buildup cycles, allowing the bone surface to cool between bursts of high-speed tissue removal, thus maintaining productivity while preventing excessive temperature rise.
3Reliability
If aggressive bone cleaning is performed to ensure complete soft tissue removal, then fusion success improves, but usable bone material is lost
Solution Approach 1:
The patent applies local quality by designing the rotary tool with varying cutting surface characteristics in different zones. The tool head incorporates areas with different cutting aggressiveness - sharper, more aggressive cutting surfaces for stubborn soft tissue attachments and gentler surfaces for final bone surface refinement. This allows selective application of cleaning intensity to different local areas, ensuring complete tissue removal from critical zones while preserving bone material in less critical areas.
Solution Approach 2:
The invention uses partial action by applying controlled, moderate cleaning forces that are sufficient for complete soft tissue removal without exceeding the threshold that would cause bone loss. The powered rotary mechanism delivers consistent, controlled torque that achieves adequate debridement through precise rotational speed control, avoiding the excessive force that would grind away usable bone material while still ensuring reliable fusion preparation.
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 tool enables efficient and effective removal of soft tissue, reducing the risk of pseudoarthrosis and improving bone yield, while minimizing bone damage and heat generation, thus enhancing the quality and speed of bone fusion procedures.
Implementation Method 1
A bone cleaning tool with a double or triple helix flute design and specialized cutting surfaces, spines, and apertures that can be used with a high-speed surgical drill to efficiently remove soft tissue from bone
Implementation Method 2
used with a high-speed surgical drill to efficiently remove soft tissue from bone
Data Source
AI summary
The present invention is directed to systems, methods, tools and surgical procedures that provide for improved, faster and/or more efficient methods for cleaning bone of soft tissue in preparation for use in bone grafting and surgery, including specific applications particularly useful in fusion procedures and/or other surgeries of the lumbar, cervical, and/or thoracic spine and/or other anatomical locations, desirably allowing for faster and complete healing.