Orthodontic Screw Radial Insertion for Stable CAD/CAM Connection
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Solution Overview
Problem
Existing orthodontic screws lack mechanical stability and require complex assembly due to non-standardized connection methods, making it difficult to effectively and securely attach connecting arms to the dental arch using CAD/CAM manufactured appliances.
Innovation Solution
An orthodontic screw design featuring two bodies connected by positioning means with orthogonal seats that allow for easy insertion and stable fixation of connecting arms, enabling secure attachment to the dental arch through a CAD/CAM process, using open seats for arm insertion and welding along the entire seat length for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If existing orthodontic screws with axial holes are used for connecting arms, then the connection can be made with simple structure, but the mechanical stability is poor and assembly complexity increases
Solution Approach 1:
The patent changes the insertion direction from axial (along the screw axis) to radial (perpendicular to the screw axis). The connecting arm is inserted radially into the body of the screw through a radial hole, rather than axially as in conventional designs. This dimensional change allows for better mechanical stability while simplifying the assembly process, as the radial insertion provides more stable welding surface and better force distribution.
2Adaptability or versatility
If non-standardized connection methods are used for CAD/CAM manufactured appliances, then manufacturing flexibility is maintained, but mechanical stability and assembly reliability deteriorate
Solution Approach 1:
The patent creates a universal connection system that can be used with CAD/CAM manufactured appliances. The standardized body with radial hole and connecting arm configuration provides a universal interface that works with different appliance types while maintaining both manufacturing flexibility and assembly reliability. This universal design eliminates the need for operator skill-dependent manual interventions.
3Volume of moving object
If connecting arms are inserted axially in reduced-dimension holes, then the screw structure remains compact, but welding stability and mechanical strength are insufficient
Solution Approach 1:
The patent transitions from axial insertion in small holes to radial insertion with larger access. The radial hole provides adequate dimensions for stable welding while maintaining compact screw design. The connecting arm is inserted perpendicular to the screw axis, allowing for proper welding geometry and strength without increasing overall screw volume significantly.
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
This design facilitates a quick, safe, and reliable connection of orthodontic appliances, improving mechanical stability and simplifying the assembly process while allowing for the use of biocompatible materials, reducing manufacturing costs and complexity.
Implementation Method 1
the portions of the appliance that connect the orthodontic screw to the dental arch or to the palatal bone are formed by CAM, for example by 'laser sintering' or 'laser melting' procedures, i.e. by additive manufacturing from metal powders
Data Source
Figure 1~12
Figure 13~20
Figure 21~23
AI summary
The invention relates to an orthodontic screw and a set of elements for forming an orthodontic or orthopedic appliance for dentistry, as well as a method for making an orthodontic or orthopedic appliance for dentistry. The orthodontic screw (2) comprises two bodies (20) connected by positioning means (21, 22) designed to allow the distance between the bodies (20) to be adjusted; the bodies (20) have a seat (23) adapted to receive a portion (30, 31) of a connection structure (3, 4) associable with the orthodontic screw for its connection to the teeth of a dental arch; the seat (23) consists of a groove (23) formed on an external surface of the bodies (20), so that said portion (30, 31) of said connection structure (3, 4) can be inserted in the seat (23) through a displacement (Y) orthogonal to the same seat (23).