Matrix Band Shaping Device with Male Female Head Components
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Solution Overview
Problem
Existing dental matrix bands with concaved contours create unstable rounded points of contact with adjacent teeth, leading to potential breakage and the need for future restoration.
Innovation Solution
A dental device featuring a pair of pliers-like mechanism with a male and female head component, allowing for the shaping of matrix bands to form a customized, broad, flat surface that mimics the inner sidewall contours, providing increased stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a concaved contour is formed on the matrix band using traditional pliers, then the matrix band can be shaped to fit the tooth cavity, but the contact point with the adjacent tooth becomes rounded and unstable, leading to potential breakage
Solution Approach 1:
The shaping device creates different surface characteristics at different locations on the matrix band: a concaved contour along the curvature to fit the tooth cavity, and a flattened surface at the contact point with the adjacent tooth. This local differentiation allows the matrix band to simultaneously achieve proper fit and stable contact.
Solution Approach 2:
The device pre-forms the matrix band with the correct contour and flattened contact surface before placement on the tooth. By shaping the matrix band in advance with the precise geometry needed, the device ensures that when the matrix band is placed, it immediately provides both proper cavity fit and stable contact with the adjacent tooth.
2Ease of manufacture
If a flat matrix band is used, then the matrix band is simple to manufacture and apply, but it lacks the concaved contour needed to properly restore anatomic contours of the tooth
Solution Approach 1:
The shaping device segments the shaping process into distinct zones: one zone creates the concaved contour along the curvature to fit the tooth cavity, while another zone creates the flattened surface at the contact point. This segmentation allows each region of the matrix band to have the specific shape needed for its function.
Solution Approach 2:
The device changes the geometric parameters of the matrix band surface: it applies concavity along the curvature to match the tooth anatomy, while maintaining a flattened surface at the contact point. These parameter changes transform a simple flat band into a precisely contoured restoration component.
3Device complexity
If traditional pliers are used to shape the matrix band, then the device structure is simple, but the shaping precision and consistency are insufficient to create the required flattened contact surface
Solution Approach 1:
The shaping device uses a male head component with a predetermined contour that serves as a template or copy of the desired matrix band shape. When the matrix band is pressed against this male component, it automatically acquires the precise contour and flattened contact surface, ensuring consistent and accurate shaping with each use.
Data Source
AI summary
A dental device for shaping matrix bands. The device has a first arm pivotally connected to a second arm. A male head component having a curved, convex inner sidewall with a flattened surface centrally disposed thereon is connected to a bar portion of the first arm. A female head component having a curved, concave inner sidewall with a flattened surface centrally disposed thereon is connected to a bar portion of the second arm. When a handle portion of the first arm is pivoted towards a handle portion of the second arm, the first bar portion pivots toward the second bar portion. The male head component mates with the female head component such that the inner sidewall of the male head component interfaces with the inner sidewall of the female head component, and the flattened surface of the male head component interfaces with the flattened surface of the female head component.