Removable orthodontic appliance

• US 4,239,487 A
• Filed: 07/20/1979
• Issued: 12/16/1980
• Est. Priority Date: 07/20/1979
• Status: Expired due to Term

• Current Assignee: Universal Dynamics, Inc. (Pentafin SpA)
• Original Assignee: Universal Dynamics, Inc. (Pentafin SpA)
• Inventors: Murdock, Dwight
• Primary Examiner(s): Peshock, Robert
• Application Number:
  US06/059,267
• Time in Patent Office: 515 Days
• Field of Search: 433/7, 433/6
• US Class Current: 433/7
• CPC Class Codes: A61C 7/00 Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
• CPC Class Codes: A61C 7/10 Devices having means to apply outwardly directed force, e.g. expanders

Abstract

A U-shaped acrylic body is separated at its closed end and slideably connected by means of a turnbuckle to allow lateral adjustment, the acrylic body further having a palatal wire extending into the palatal area of the mouth, buccal wires emerging from the outer sides and extending in a rectangular construction parallel thereto, and cuspid guidance wires emerging perpendicularly from the outer sides. The palatal wire is separated at its approximate midpoint in the palatal area and slideably connected, such that when the appliance is positioned in the mouth adjacent the inner sides of the teeth the wearer can make periodic lateral adjustments.

Claims

1. An orthodontic appliance comprising

(a) a U-shaped plastic body adapted to fit within the mouth adjacent the inner sides of the upper and lower teeth, the closed end being adjacent the front teeth and being separated at the approximate midpoint to divide the plastic body into slightly spaced apart matching halves;

(b) means disposed across the separation of the closed end of the plastic body for connecting the two halves and allowing each half to be moved apart laterally;

(c) a palatal wire connected across the sides of the plastic body and adapted to extend into the palatal area and towards the rear of the mouth, the wire being separated at its approximate midpoint;

(d) means for slideably connecting the free ends of the palatal wire for allowing lateral movement thereof; and

(e) a pair of buccal wires, each attached to an outer side of the plastic body, the wires adapted to abut the teeth on the outer sides thereof.

2. The orthodontic appliance of claim 1 additionally comprising a pair of wire loops extending perpendicularly from the sides of the plastic body out to the area of the buccal wires, for cuspid positioning of the appliance.

3. The orthodontic appliance of claim 1 wherein the means connecting the two halves of the plastic body comprises a turnbuckle set into the plastic and having a metal pin with an aperture exposed between the separation, for lateral adjustment by the wearer.

4. The orthodontic appliance of claim 1 wherein the means for slideably connecting the free ends of the palatal wire comprises a cylindrical metal member attached to one free end and being adapted to snugly receive the other free end.

5. The orthodontic appliance of claim 1 wherein each buccal wire comprises a single wire emerging from the front portion of the plastic body and running along the side thereof in a substantially rectangular construction back to the point of emergence.

6. The orthodontic appliance of claim 1 wherein the closed end of the plastic body has a flange which projects between the wearer'"'"'s incisors and contacts the upper and lower incisors after biting down.

7. The orthodontic appliance of claim 1 wherein the plastic body is formed of acrylic.

8. The orthodontic appliance of claim 1 wherein the buccal wires fit between the canine and premolar teeth on either side of the wear'"'"'s jaw, and wherein the wire loops fit behind the second premolars.

9. The orthodontic appliance of claim 1 wherein the inner sides of the plastic body have grooves accomodating adjacent upper and lower teeth.

10. The orthodontic appliance of claim 1 additionally comprising integral plastic panels running across the front of the appliance from either side thereof and from the closed end of the plastic body.

11. The orthodontic appliance of claim 10 wherein each of the sides of the plastic body are separated and slideably connected, to allow front to rear adjustment of the appliance.

12. The orthodontic appliance of claim 1 wherein the closed end of the plastic body has an upward projecting portion for preventing the tongue from thrusting between the teeth, to remedy open bite malocclusions.