Dental Shaping Strip With Segmented Abrasive Base
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Solution Overview
Problem
Current techniques for shaping and smoothing the occlusal embrasure of composite resin restorations in dentistry are inadequate, often resulting in sharp edges and corners that are prone to fracture, and fail to replicate the natural 'V' shape of occlusal embrasures, leading to premature failure and oral hygiene issues.
Innovation Solution
A dental shaping strip with a non-abrasive base portion and an abrasive shaping portion, designed to shape the occlusal embrasure without damaging adjacent teeth or the restoration, featuring a flexible substrate with abrasive particles applied to one side to create a 'V' shape and rounded marginal ridges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an abrasive finishing strip is used to shape the occlusal embrasure, then the restoration can be shaped to match natural tooth contours, but the adjacent teeth may be abraded or damaged
Solution Approach 1:
The finishing strip is divided into two distinct portions: a non-abrasive base portion that contacts the adjacent teeth to protect them, and an abrasive shaping portion that contacts the restoration to shape it. This segmentation allows the tool to simultaneously shape the restoration while protecting the adjacent teeth from abrasion.
Solution Approach 2:
Different portions of the finishing strip have different surface properties: the base portion has a non-abrasive smooth surface that protects adjacent teeth, while the shaping portion has an abrasive surface that shapes the restoration. This local differentiation of surface quality enables selective action on different objects.
2Shape
If conventional abrasive techniques are used to shape posterior teeth restorations, then the restoration can be contoured, but sharp edges and corners are created that are prone to fracture
Solution Approach 1:
The non-abrasive base portion has rounded corners and edges that guide the abrasive shaping portion to create corresponding rounded contours on the restoration. This curvature principle prevents the formation of sharp edges and corners on the restoration, making it more resistant to fracture and chip.
3Shape
If the finishing strip is inserted between contact areas to shape the restoration, then the occlusal embrasure can be shaped, but the interproximal contact tightness may be compromised
Solution Approach 1:
The finishing strip is segmented into a base portion wide enough to engage between the contact areas and provide stability, and a shaping portion that extends apically to shape the occlusal embrasure. This segmentation allows the base portion to maintain contact tightness while the shaping portion creates the desired embrasure form.
Solution Approach 2:
The rounded contours of the base portion facilitate easy insertion between the contact areas without forcing the teeth apart, thereby maintaining interproximal contact tightness while allowing the shaping portion to create the desired occlusal embrasure morphology.
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 strip effectively shapes the occlusal embrasure to match natural tooth contours, preventing fracture and improving oral hygiene by avoiding sharp edges, while maintaining interproximal contact tightness and preventing food impaction.
Implementation Method 1
The shaping portion has a first shaping surface connected to the first base surface, with at least part of the first shaping surface being abrasive
Data Source
AI summary
A dental shaping strip includes a base portion and a shaping portion. The base portion has a first base surface and a second base surface facing in an opposite direction from the first base surface. The first and second base surfaces have prescribed longitudinal lengths and prescribed widths transverse to the prescribed longitudinal lengths. The shaping portion is connected to a longitudinal edge of the base portion. The shaping portion has a first shaping surface connected to the first base surface, with at least part of the first shaping surface being abrasive. The first and second base surfaces are at least partially non-abrasive. Preferably, the first shaping surface and the first base surface diverge from each other as they approach longitudinal free edges of the dental shaping strip. Preferably, the first and second base surfaces are non-abrasive along their prescribed longitudinal lengths.