Orthodontic Bracket Positioning Guide Using Photo-Polymerizable Resin
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Solution Overview
Problem
Existing orthodontic bracket installation methods, such as indirect bonding, face challenges in accurately positioning brackets due to deviations during installation and require removal of resin cores, which can damage teeth and limit operation time.
Innovation Solution
A production method involving a positioning guide for orthodontic brackets, where a first dental photopolymerizable composition is coated on the bracket, a second composition with adhesive properties is applied to fill gaps, and a third composition easily abraded under occlusal pressure is used to create a guide on the bracket's surface, allowing accurate installation without thick core parts and minimizing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a thick core part is formed to match the tooth surface shape, then the bracket can be positioned accurately, but the core part must be removed after installation which consumes time and may damage teeth
Solution Approach 1:
The invention extracts only the necessary positioning function from the thick core part. Instead of forming a thick core that matches the entire tooth surface, a thin positioning guide is formed that provides sufficient positioning accuracy while eliminating the need for removal. The positioning guide is integrated with the bracket and automatically removed when the bracket is installed.
Solution Approach 2:
The positioning guide is formed in advance on the bracket before installation. This preliminary formation of the positioning guide eliminates the need for subsequent removal operations, as the guide structure is designed to be automatically removed or integrated during the bracket installation process itself.
2Manufacturing precision
If a thick core part is formed to ensure proper bracket installation, then positioning accuracy is improved, but the installation process becomes more complex and time-consuming
Solution Approach 1:
The invention extracts only the essential positioning function from the complex thick core part structure. A simplified thin positioning guide is formed that provides the necessary positioning accuracy without requiring complex formation or removal procedures, thereby reducing installation process complexity.
Solution Approach 2:
The positioning guide is preliminarily formed on the bracket before installation, integrating the positioning function into the bracket itself. This eliminates the need for separate core part formation and removal steps, simplifying the overall installation process while maintaining positioning accuracy.
3Ease of manufacture
If normal temperature polymerizing resin is used to form the positioning guide, then the material is easy to handle, but the operation time is limited
Solution Approach 1:
The invention replaces the chemical polymerization process with a photo-polymerization process using light-curing resin. This substitution allows the positioning guide to be formed quickly under light irradiation without being constrained by the limited working time of normal temperature polymerizing resins, while still maintaining ease of handling during the application phase.
4Ease of operation
If residual resin remains after core part removal, then the installation process is simplified, but the resin may damage tooth cut edges or occlusal surfaces
Solution Approach 1:
The invention extracts only the necessary positioning function with a thin guide structure that minimizes material volume. This thin positioning guide can be completely removed or integrated during bracket installation without leaving residual resin that could damage tooth surfaces, eliminating the harmful effect while maintaining operational simplicity.
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
Enables stable and accurate bracket installation without the need for removing resin cores, preventing damage to teeth and allowing sufficient operation time, with the third composition being easily removable if occlusion becomes unsmooth.
Implementation Method 1
a first dental photopolymerizable composition as a base material is thinly coated on a bonding surface of each orthodontic bracket... the first dental photopolymerizable composition and the second dental photopolymerizable composition are polymerized/cured by irradiating light
Data Source
AI summary
An orthodontic bracket with a positioning guide is produced by thinly coating a first dental photopolymerizable composition 1 on a bonding surface of each orthodontic bracket B, building a second dental photopolymerizable composition 2 adhesive to the first composition 1 on the bonding surface, adhering it to a tooth surface of a dentition gypsum model 3 reproducing a patient's dentition, a separating material being previously coated on the tooth surface of the gypsum model 3, polymerizing/curing the first and second compositions 1 and 2 by irradiating light, thinly coating a third dental photopolymerizable composition 4 on a tongue side and/or a cheek side entire surface around the orthodontic bracket B on the gypsum model 3, the third composition 4 being easily abraded when an occlusal pressure is acted, and polymerizing/curing the third composition 4 by irradiating light to be integrated with at least the second composition 2.