Clear Aligner Attachment Composite Selection for Abrasion Resistance
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Solution Overview
Problem
Existing clear aligner therapy attachments suffer from rapid wear due to friction and brushing, affecting the orthodontic process negatively.
Innovation Solution
A method using a toothbrush simulator to test the abrasion resistance of composite materials by simulating the wear caused by aligner friction and brushing, identifying the least worn material for attachment manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If clear aligners are removed and re-worn frequently for eating and brushing, then patient compliance and oral hygiene are improved, but attachment wear increases rapidly
Solution Approach 1:
The patent changes the material parameters of the attachment by using composite materials with different formulations. Specifically, it compares conventional composite materials with experimental composite materials that have optimized resin matrix composition and filler content, thereby altering the material's wear resistance properties to withstand frequent removal and re-wearing of aligners
Solution Approach 2:
The patent employs composite materials consisting of resin matrix and inorganic fillers in specific ratios. The experimental composite material uses a combination of bis-GMA, TEGDMA, and UDMA resins with 60-80 wt% inorganic filler content, creating a multi-phase composite structure that provides both bonding capability and enhanced abrasion resistance against aligner friction
2Ease of manufacture
If toothpaste with abrasive material is used for brushing teeth, then oral hygiene is improved, but attachment surface wear increases
Solution Approach 1:
The patent modifies the surface properties of the attachment material by changing the composite formulation. The experimental material has higher inorganic filler content (60-80 wt%) and optimized resin composition, which alters the surface hardness and abrasion resistance parameters, making the attachment more resistant to toothpaste-induced wear while maintaining bonding effectiveness
Solution Approach 2:
The patent applies a protective approach by selecting composite materials with inherent high wear resistance before the brushing process begins. The experimental composite material is designed with superior mechanical properties that preemptively protect against the harmful abrasive effects of toothpaste, cushioning the attachment surface against degradation before exposure to brushing occurs
3Reliability
If attachment material composition is kept secret by manufacturers, then proprietary information is protected, but material comparison and selection become difficult
Solution Approach 1:
The patent creates a testing system that uses copies or replicas of attachment materials for evaluation. Instead of requiring access to proprietary manufacturing processes, the invention uses composite material samples with known formulations that replicate the functional properties of commercial attachments, allowing standardized wear testing and performance comparison without revealing trade secrets
Solution Approach 2:
The patent develops a universal testing methodology that can evaluate different composite materials using standardized protocols. The wear testing apparatus and procedures create a common platform for comparing various attachment materials, enabling objective performance assessment across different manufacturers' products while respecting their proprietary formulations through indirect comparison methods
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
Identifies a composite material with superior abrasion resistance for attachments, ensuring effective and prolonged orthodontic treatment.
Implementation Method 1
the repetitive removal and re-wearing of a clear aligner over an extended period of time causes wear on the attachment(s) due to the friction (or rubbing) that results between the aligner and the attachment(s)
Implementation Method 2
the process of brushing one's teeth will likely cause further wear on the attachment(s) since toothpaste typically contains fine abrasive material
Data Source
AI summary
An orthodontic method includes forming a plurality of abrasive objects, each abrasive object including material usable for forming clear dental aligners. The plurality of abrasive objects can be rubbed against a plurality of composite objects, each composite object being made of a composite material usable for forming attachments on teeth in dental clear aligner therapy. An amount of wear on the plurality of composite objects as a result of the rubbing step can be determined. A composite object with a least amount of wear from among the plurality of rubbed composite objects can be identified. The composite material of the composite object identified as having the least amount of wear can be utilized to make an attachment for a tooth of a clear dental aligner therapy patient. The attachment can be affixed to a tooth of the dental patient.