Surgical Tool Protection Device for Gentle Bone Extraction
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Solution Overview
Problem
Current surgical methods for bone extraction in oral surgery, such as using trephine mills, require multiple cuts and significant force, posing challenges for both surgeons and patients, and risk injury to surrounding tissues.
Innovation Solution
A hand-held surgical device with a protective device that encompasses the distal edge of a hollow cylindrical tool, allowing for bone extraction using a single breaking point and minimizing force, with a circular arc functional region for gentle bone piece removal, and adjustable dimensions to prevent nerve injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple cuts are made with trephine mills to extract bone pieces, then bone extraction is achieved, but the operation requires significant force and multiple steps, increasing complexity and patient discomfort
Solution Approach 1:
The distal edge of the hollow cylinder head is segmented into a functional region with teeth for bone engagement and a non-functional region covered by the protective device. This segmentation allows the tool to extract bone pieces in a single peeling motion rather than requiring multiple cuts, thereby improving productivity while maintaining manageable device complexity
Solution Approach 2:
The protective device is pre-positioned on the hollow cylinder head before the extraction procedure begins. This preliminary action defines the functional region in advance, allowing the surgeon to immediately perform the peeling extraction without needing to make multiple preliminary cuts, thus reducing the number of steps and patient discomfort
2Area of stationary object
If the entire distal edge of the hollow cylinder is used as functional region, then maximum bone contact is achieved, but surrounding soft tissue is at risk of injury
Solution Approach 1:
The protective device creates a local distinction on the hollow cylinder head by covering the non-functional portions of the distal edge while leaving the functional region with teeth exposed. This local quality modification ensures that only the intended functional area contacts the bone, maximizing effective bone contact while the protective device simultaneously shields surrounding soft tissue from injury
Solution Approach 2:
The protective device acts as an intermediary element between the hollow cylinder head and the surrounding environment. It mediates the interaction by selectively exposing the functional region for bone contact while protecting the non-functional regions and surrounding soft tissue, thus achieving both maximum safe bone contact and tissue protection
3Productivity
If forceful hammering is used to break out bone blocks, then bone extraction is achieved, but patient discomfort increases and surgeon skill requirements increase
Solution Approach 1:
The invention replaces the traditional mechanical hammering system with a rotating peeling system. The hollow cylinder head with teeth on its distal edge rotates to peel bone pieces off the bone surface in a controlled manner, substituting the forceful impact mechanics of hammering with the controlled shearing mechanics of rotation, thereby achieving bone extraction with less force and lower skill requirements
Solution Approach 2:
The invention changes the operational parameters from high-force impact (hammering) to low-force rotation (peeling). By transforming the extraction mechanism from a high-energy impact process to a controlled rotational process, the operation becomes easier to perform with reduced skill requirements while maintaining effective bone extraction capability
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
Enables reliable, gentle bone extraction with reduced patient load and enhanced tissue protection, allowing for simpler handling and effective bone regeneration for dental implants.
Implementation Method 1
Teeth for machining bones are formed on the distal edge of the head. Trephine mills are used, for example, for preparing implant beds
Implementation Method 2
such a tool can be used to 'peel off' the necessary bone pieces or bone segments from the bone
Data Source
AI summary
A hand-held surgical device, particularly for use in oral surgery, includes a rotatable tool, a head of the tool having a hollow-cylindrical design, and an active region, particularly for machining bones, being arranged at a distal edge of the head. A protection device is arranged which partially surrounds the distal edge of the tool and in some sections extends in the axial direction beyond the distal edge such that only a circular arc of the distal edge serves as the active region. The protection device may have a connecting element for detachably securing to the hand-held surgical device.