Hollow-Point Rotary Tool for Bone Densification With Less Force
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Solution Overview
Problem
Current osseodensification techniques, such as the socket shield method, have limited applicability and require improvements for wider use and efficiency in bone preparation for implants, particularly in terms of speed and ease of application.
Innovation Solution
A rotary tool designed to operate at high speed in both cutting and densifying directions, featuring a shank with flutes and spurs, allowing for efficient bone densification with reduced vertical force, and an integrated irrigation system for enhanced bone preparation and autografting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If traditional drilling techniques are used to prepare bone holes, then bone tissue is removed efficiently, but bone density and strength are reduced
Solution Approach 1:
The rotary tool is designed to rotate in reverse non-cutting direction to compact bone tissue outwardly from the osteotomy rather than removing it. This inversion of the traditional cutting action transforms bone removal into bone compaction, creating dense compacted bone tissue that provides stronger purchase for implants while preserving host bone.
Solution Approach 2:
The patent converts the potentially harmful effect of bone tissue disruption into a beneficial compaction process. By rotating the tool in reverse non-cutting direction, the mechanical energy that would otherwise remove bone is instead used to compact and densify bone tissue, transforming a harmful effect into a therapeutic benefit that enhances implant stability.
2Strength
If socket shield technique is used to preserve buccal plate, then bone preservation is improved, but applicability and efficiency are limited
Solution Approach 1:
The rotary tool with dual rotation capability serves multiple functions: it can cut bone when needed and compact bone when rotated in reverse non-cutting direction. This multi-functionality allows the same tool to be applied across various surgical scenarios including socket shield technique, traditional osteotomy preparation, and other bone preservation procedures, significantly expanding applicability beyond the limitations of specialized single-function tools.
Solution Approach 2:
The patent changes the operational parameters of the rotary tool by controlling rotation direction. When rotated in reverse non-cutting direction, the tool performs compaction instead of cutting. This parameter change enables the tool to adapt to different surgical requirements, making it versatile for both bone preservation techniques like socket shield and traditional bone preparation procedures.
3Strength
If high vertical force is applied during bone densification, then densification effect is improved, but ease of operation deteriorates
Solution Approach 1:
The rotary tool utilizes high-speed rotation to create dynamic mechanical action that enhances bone compaction. The rotational motion generates vibrational effects that facilitate bone tissue displacement and compaction with reduced vertical force requirements, making the procedure easier to perform while maintaining effective densification.
Solution Approach 2:
The patent replaces the traditional mechanical pressing system with a rotary mechanical system. Instead of relying solely on vertical force to compact bone, the tool uses rotational motion to generate centrifugal and vibrational forces that achieve bone densification with less vertical pressure, improving ease of operation.
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 broader applicability and faster, easier bone preparation with reduced vertical force, facilitating more efficient osseodensification and improved implant integration by creating a strong, dense bone layer for enhanced implant stability and healing.
Implementation Method 1
the majority of bone tissue is simultaneously compacted in outwardly expanding directions from the osteotomy
Implementation Method 2
When rotated at high speed in a reversed, non-cutting direction with steady external irrigation
Data Source
AI summary
A rotary tool configured for high speed condensing and/or cutting action to form a hole. The tool has a body around which is formed a plurality of flutes. Each flute has a cutting face on one side and a densifying face on the other side. A land between adjacent flutes establishes a substantially margin-less working edge along each cutting face. The working edges are configured to produce osseodensification when the tool is operated in the condensing mode. A cavity is formed inside the body with access through its apical end. A plurality of spurs rim the apical end. Each spur has a grinding edge that is offset from said longitudinal axis in the cutting direction of rotation. Some of the flutes open directly into a gullet formed between adjacent spurs. Some of the flutes open directly into leading flanks that fall away from each grinding edge.