Adjustable Crown Remover With Vertical Prongs And Horizontal Projections

Solution Overview

Problem

Conventional crown removal methods often result in damage to the existing crown or underlying tooth, requiring great skill and care to avoid injury.

Innovation Solution

A crown remover with a tray having buccal and palatal side vertical prongs, adjustable screws, and horizontal projections for secure grip and minimal pressure, allowing for safe removal of crowns with minimal damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional crown removers (clamps) are used to grip and pull the crown, then the crown can be removed, but the risk of damaging the crown or underlying tooth increases due to undue pressure and slippage

Engineering Contradiction:
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The crown remover is divided into multiple functional components: a tray with vertical prongs for positioning, horizontal projections for gripping, and a handle for applying controlled force. This segmentation allows each component to perform its specific function, distributing the removal force evenly and reducing the risk of concentrated pressure damage to the crown or tooth.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The horizontal projections act as intermediaries between the vertical prongs and the crown. These projections provide a secure gripping surface that distributes pressure evenly across the crown structure, preventing slippage and reducing the risk of damage during removal.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If great skill and care are exercised during crown removal to prevent damage, then the risk of injury is reduced, but the time and complexity of the procedure increase

Engineering Contradiction:
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The crown remover is designed to be self-aligning through its vertical prongs that fit into predetermined positions on the crown. This self-service feature reduces the need for complex manual positioning and manipulation by the dentist, simplifying the procedure while maintaining safety.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The vertical prongs are designed to be positioned and secured before the actual removal force is applied. This preliminary positioning and locking action prepares the device for safe force application, reducing the need for complex real-time adjustments during the removal process.

Inventive Principle:
Principle #10Preliminary action

3Productivity

If conventional drilling or cutting techniques are used to loosen the crown, then the crown can be removed, but the underlying tooth structure may be damaged

Engineering Contradiction:
Core Design Contradiction:
ProductivityVSManufacturing precision

Solution Approach 1:

The invention replaces the conventional drilling and cutting mechanical systems with a direct mechanical leverage system. The tray and vertical prongs provide stable positioning, while the handle allows application of controlled leverage forces to loosen and remove the crown without the need for invasive drilling or cutting that could damage tooth structure.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS12268568B1Crown remover
Publication Date: 2025.04.08
  • US12268568B1 patent drawing
  • US12268568B1 patent drawing
  • US12268568B1 patent drawing

AI summary

A crown remover is provided. The crown remover is a crown removing dental appliance including a tray having a base, a buccal side vertical prong extending along an entire first side of the tray, and a palatal side vertical prong extending along an entire second side of the tray located opposite the first side. A buccal side vertical prong screw allows for adjustability of the buccal side vertical prong and a palatal side vertical prong screw allowing for adjustability of the palatal side vertical prong. A buccal side horizontal projection is located on the buccal side vertical prong and protrudes toward the center of the tray. A palatal side horizontal projection is located on the palatal side vertical prong and protrudes toward the center of the tray. A handle protrudes from the base.