Orthodontic Cap Engagement Mechanism for Bracket Retention
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Solution Overview
Problem
Conventional orthodontic devices face challenges with the ease of mounting and removing orthodontic caps, which can cause frictional resistance issues and require multiple tools, leading to increased treatment time and patient discomfort.
Innovation Solution
An orthodontic device with an engaging portion on the archwire slot and a cap that covers the entire slot, allowing for easy engagement and removal using a removing device, reducing frictional resistance and providing an aesthetic appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional elastomeric ring is used to retain the archwire, then the archwire can be secured in the archwire slot, but the material deteriorates and loses elasticity under intraoral conditions, requiring frequent replacement
Solution Approach 1:
The patent employs a ligature wire made of durable metal material that can be retained on the bracket for extended periods without deteriorating like elastomeric rings. The metal ligature wire maintains its mechanical properties throughout the treatment period, eliminating the need for frequent replacements while providing reliable archwire retention.
Solution Approach 2:
The patent changes the material parameter from elastomeric polymer to metal alloy, fundamentally altering the durability and degradation characteristics. This material substitution transforms the retention mechanism from a short-lived elastic component to a long-lasting metallic ligature that resists intraoral degradation.
2Reliability
If a ligature wire is used to retain the archwire, then the archwire can be secured, but the degree of ligation is difficult to control, increasing frictional resistance and extending treatment period
Solution Approach 1:
The patent applies different local qualities to different parts of the ligature wire system. The ligature wire is designed with specific local characteristics: a ligation portion that can be controlled to appropriate tightness, and a tail portion that extends outward. This allows the doctor to ligate the archwire securely without excessive friction, and then trim the excess tail to prevent mucosal damage.
Solution Approach 2:
The patent introduces a dynamic element through the adjustable ligation process. The ligature wire can be tightened to the desired degree, secured, and then the excess length can be trimmed. This dynamic adjustment allows optimization of the ligation force to minimize frictional resistance while maintaining secure retention, thereby reducing treatment period.
3Reliability
If the ligature wire is ligated too tight, then the archwire is securely retained, but frictional resistance between the archwire and archwire slot increases, failing to obtain desired correcting force
Solution Approach 1:
The patent applies partial ligation rather than excessive tightening. The ligature wire is wrapped around the archwire and bracket just enough to secure retention, leaving the archwire slot partially open. This partial ligation approach provides sufficient retention while maintaining low frictional resistance, allowing the archwire to exert its full correcting force on the teeth.
4Shape
If an orthodontic bracket cap is used to cover the entire surface of the bracket, then aesthetic appearance is improved, but the cap is hard to mount onto the attachment
Solution Approach 1:
The patent segments the bracket system into distinct functional components: the bracket body, the archwire slot, and the ligature wire. Instead of using a single integrated cap that covers the entire bracket surface, the ligature wire serves as a separate component that provides both retention function and aesthetic coverage. This segmentation allows easy mounting by simply placing the ligature wire on the bracket without complex assembly procedures.
5Adaptability or versatility
If multiple ligating tools of different sizes are used for respective portions of the attachment, then each portion can be properly ligated, but it takes time and labor for the doctor to distinguish them
Solution Approach 1:
The patent employs a universal ligature wire that can be used on all brackets regardless of size or position. The single ligature wire design provides multi-functionality, serving as both the retention mechanism and the aesthetic cover for all bracket types. This eliminates the need for doctors to distinguish between multiple specialized tools, significantly reducing mounting time and labor while maintaining adaptability to different bracket portions.
6Ease of operation
If the ligating tool is structured to be removed by cutting with a cutter, then the tool can be detached, but it requires a troublesome operation
Solution Approach 1:
The patent extracts the excess ligature wire tail after ligation and secures it by trimming with scissors or cutters. This extraction approach removes the troublesome portion (excess wire) while maintaining the functional portion (ligated archwire). The procedure is simpler than removing an entire ligating tool, as it only requires trimming the excess tail rather than cutting through a structured ligating device.
Data Source
AI summary
An orthodontic device (10) according to the invention having an orthodontic attachment (11) which includes an engaging portion (17) formed in a side portion of an archwire slot (16), and an orthodontic cap (13) mounted on the orthodontic attachment (11) while covering the whole of the archwire slot (16) and includes an engaging/receiving portion (22) extending in a direction perpendicular to a mesiodistal direction of the archwire (12) and engageable with the engaging portion (17). A method for mounting and removing an orthodontic cap which to facilitate the mounting and removing of the orthodontic cap with respect to the orthodontic attachment.