U-Shaped Double-Bladed Dental Elevator Resists Tip Bending

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Solution Overview

Problem

Existing dental instruments with thin, pointed tips, such as the 'Diamond-V' and '779 Iwaki patent, are prone to bending and breaking under force, particularly when twisted during use, leading to deformation or breakage.

Innovation Solution

A dental instrument with squared-off, flat blade tips designed to engage shallowly, featuring a U-shaped end that enhances strength and resilience, allowing for effective tooth extraction without deep penetration into the periodontal ligament space.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If thin, pointed tips are used to penetrate deep into the bone or periodontal ligament space, then the ability to engage deeply is improved, but the tips become prone to bending and breaking under force

Engineering Contradiction:

Improvepenetration depthVSAvoidtip strength

Core Design Contradiction:

Length of moving objectVSStrength

Solution Approach 1:

The patent changes the geometric parameters of the tip from thin and pointed to squared-off and flat, while maintaining the ability to engage with bone and periodontal ligament. This parameter change increases the moment of inertia and cross-sectional area, thereby improving strength without sacrificing penetration capability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

Instead of using pointed tips that concentrate force at a small area, the patent inverts the approach by using squared-off flat tips that distribute force across a broader area. This inversion of the traditional tip geometry resolves the contradiction between penetration depth and tip strength

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If the handle is twisted during use to apply lateral force, then the extraction effectiveness is improved, but the thin tips deform or break due to lateral force

Engineering Contradiction:

Improveextraction effectivenessVSAvoidtip durability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent introduces curvature in the shaft design with different curvatures (first, second, and third curvatures) that allow the instrument to navigate anatomical structures while the squared-off tips maintain their structural integrity during twisting motions, enabling effective extraction without tip failure

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Strength

If squared-off flat blade tips are used instead of thin pointed tips, then tip strength and resistance to breaking are improved, but the penetration depth into the periodontal ligament space is reduced

Engineering Contradiction:

Improvetip strengthVSAvoidpenetration depth

Core Design Contradiction:

StrengthVSLength of moving object

Solution Approach 1:

The patent segments the shaft into multiple sections with different curvatures and characteristics, allowing the squared-off tips to engage effectively with bone and periodontal ligament structures at various depths and angles, compensating for the reduced penetration depth of individual tips

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250241729A1Double Bladed Dental Elevator

Publication Date: 2025.07.31 FYFFE DAVID

AI summary

The invention prescribes a dental tooth elevator for dental use, one embodiment of which exhibits a doubled bladed instrument formed by a U-shaped notch which resists bending for extracted teeth and gum line when embedded to expand and loosen teeth between tooth and bone both mesio-distal (backward) and bucco-lingual (side-to-side) as said elevator is twisted by operator increasing tooth movement while, unlike traditional straight elevators, the flat tipped doubled blades further resists slippage during tooth extraction.