Mylar Dental Matrix Band for Stable Interproximal Filling
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Solution Overview
Problem
Existing dental matrix bands face challenges such as difficulty in securing filling material within interproximal cavities, inadequate fit along teeth, and failure to align with the cementoenamel junction, leading to potential movement and voids in filling material, as well as issues with customization, durability, and aesthetics.
Innovation Solution
A custom-fit mylar matrix band with an inverted-V shape, featuring angled regions and markings for orientation, designed to securely wrap around teeth and gums, ensuring a snug fit and stable placement of filling material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard matrix band is used to retain filling material, then the filling material can be contained during curing, but the matrix band may move during the procedure causing voids or material flow outside the cavity
Solution Approach 1:
The matrix band incorporates a tapered section with a specific angle (20-45 degrees) that matches the anatomical taper of the tooth preparation. This localized geometric adaptation ensures the band fits precisely at the critical interproximal region, preventing movement while maintaining proper alignment during the filling procedure.
Solution Approach 2:
The matrix band features an asymmetric design with a tapered section on one side and a straight section on the other. This asymmetry allows the band to conform to the specific geometry of interproximal tooth preparations, providing stable retention while preventing displacement during curing.
2Manufacturing precision
If the matrix band shape matches the anatomical shape of the tooth above the gum line, then the band fits intimately along the tooth, but customization is required for each tooth type
Solution Approach 1:
The matrix band is divided into distinct functional sections: a tapered section for interproximal fit, a straight section for crown coverage, and engagement features for retention. This segmentation allows a single band design to adapt to various tooth types and preparation geometries without requiring complete customization for each case.
Solution Approach 2:
The matrix band incorporates variable geometric parameters, including a tapered section with angles ranging from 20-45 degrees and adjustable lengths of tapered versus straight sections. These parameter variations enable the same basic design to fit different tooth sizes and shapes while maintaining intimate contact with the preparation walls.
3Reliability
If the matrix band follows the cementoenamel junction anatomy, then optimal sealing and material compaction are achieved, but the band design becomes more complex
Solution Approach 1:
The matrix band features a tapered section specifically designed to follow the cementoenamel junction anatomy at the critical gingival margin. This localized geometric adaptation provides optimal sealing and material compaction at the most critical area without requiring the entire band to be complex.
Solution Approach 2:
The tapered section of the matrix band incorporates a curved, tapered geometry that naturally follows the anatomical contour of the cementoenamel junction. This curved design achieves intimate adaptation to the tooth structure, ensuring proper sealing and material placement at the gingival margin.
Data Source
AI summary
There is a mylar matrix band. The mylar matrix band has an elongated thin plastic film having an overall shape of an inverted-V with a flattened middle, and including three regions, specifically: a middle region having a primary axis along a horizontal extent thereof; a left region adjacent to the middle region and extending at a first angle from the primary axis of the middle region; and a right region adjacent to the middle region opposite the left region and extending at a second angle from the primary axis of the middle region; wherein the first and second angles are between 25-60 degrees from the primary axis and an interior length of the middle region as measured from an interior transition between each of the left region and right region is greater than 5 mm.