Folded orthodontic spring

Details Folded orthodontic spring Folded orthodontic spring

1996-12-24

1998-10-20

Lucchesi, Nicholas D.

Dentistry

Orthodontics

Means to transmit or apply force to tooth

433 18, A61C 300

Patent

active

058237720

ABSTRACT:
An orthodontic spring is comprised of a wave spring made of shape memory alloy that consists of a wire tightly looped, once or many times back on itself, side-to-side in figure "8"fashion. After winding, the spring is heat treated into this position. In its relaxed state, the bends of the spring form peaks and valleys which lie in parallel planes at an angle to the line of force between attachment loops at opposite end points of the spring. Portions of the wire between successive peaks and valleys overlap other portions between other peaks and valleys when the wire is relaxed. When extended, the elements of the spring lie in a longitudinal plane along its line of force. The spring is particularly suited to attachment between closely spaced points, such as brackets affixed to adjacent teeth.

REFERENCES:
patent: 4197643 (1980-04-01), Burstone et al.
patent: 4976614 (1990-12-01), Tepper
patent: 5167499 (1992-12-01), Arndt et al.
patent: 5312247 (1994-05-01), Sachdeva et al.
patent: 5314331 (1994-05-01), Brosius et al.
patent: 5399087 (1995-03-01), Arndt
patent: 5429501 (1995-07-01), Farzin-Nia et al.

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