Abstract:
A crimp stop is made of a U-shaped cross-section member made of a metal material, the member being annealed to soften the metal material. The crimp stop can be made by a process for including forming a metal material into a member having a U-shaped cross-section, annealing the member by heating, and cooling the annealed member to soften the metal material.
Abstract:
This orthodontic appliance comprises a novel arch wire having posterior segments of circular cross-section and an anterior segment at least part of which is rectangular or trapezoidal in cross-section. When used in "light wire" treatment, the arch wire is secured to a bracket by a special lock pin having an offset surface on its tail. The offset surface cooperates with the rectangular portion of the anterior segment to prevent relative rotation between the arch wire and the bracket, thereby allowing torqueing. The special lock pin is also used with a uniform rectangular wire to apply torque to posterior teeth having light wire brackets.
Abstract:
A crimping machine includes a platform having a substantially flat upper working surface and a first crimping jaw fixed on the platform. An arm is slidably attached to the platform, the arm having a second crimping jaw provided thereon, the arm being slidable at least between a first, crimping position in which the first and second jaws are opposed and adjacent one another and spaced apart by a first distance sufficient to crimp a workpiece between the first and second jaws, and a second, open position in which the first and second jaws are opposed and spaced apart by a second distance, the second distance being greater than the first distance and sufficient to insert an uncrimped workpiece therebetween. A resilient biasing element is provided for biasing the second jaw towards the first jaw. An actuator is provided for forcing the arm into the first, crimping position.
Abstract:
An orthodontic bracket includes a base, an archwire slot extending through the base, and archwire slot extensions extending substantially in the mesiodistal direction from opposite sides of the base.
Abstract:
An orthodontic appliance including a series of orthodontic brackets configured to be secured to the teeth of patient, the brackets having slots for supporting an orthodontic arch wire, and an orthodontic arch wire extending through the slots. The orthodontic arch wire is arch-shaped and includes posterior segments and an anterior segment connecting the posterior segments. Either the anterior segment, or the entire arch wire, has a non-symmetrical, trapezoidal cross-section, and can be supported by bracket slots having either a rectangular or non-symmetrical trapezoidal shape.
Abstract:
An orthodontic bracket includes a bracket body having a mesial-distally extending archwire slot opening to the labial surface portion, and a mesial-distally extending groove provided adjacent the archwire slot in a portion of the bracket body labially and occlusally of the archwire slot, the groove opening in a gingival direction. A spring clip of resilient material has labial and lingual portions in embracing sliding engagement with corresponding labial and lingual surface portions of the body, the spring clip being movable on the bracket body between an open position in which the archwire slot is open to the labial surface portion and a closed position in which the archwire slot is closed by the spring clip to the labial surface portion. The labial portion of the spring clip terminates in a free end that, in the closed position, is retained in the groove in the bracket body. The groove substantially prevents movement of the spring clip in the labial direction when in the closed position and is provided in relation to the archwire slot such that, when an archwire is provided in the archwire slot and is in contact with a lingual surface of the archwire slot, the spring clip is not in contact with the archwire.
Abstract:
A reverse curve archwire includes a generally smoothly curved U-shaped metal wire having a curved central anterior segment including a mesial center line of the U-shaped metal wire and a pair of posterior segments extending from ends of the anterior segment. Each posterior segment has a reverse Curve of Spee of a predetermined radius when relaxed. A pair of connecting members is attached to the archwire, each connecting member being provided on a respective side of the mesial center line.
Abstract:
An orthodontic arch wire has a generally parabolic shape. The arch wire includes a curved anterior segment and a pair of posterior segments connected to and extending from respective ends of the curved anterior segment. The curved anterior segment and the pair of posterior segments comprise three discrete pieces having substantially the same flexural rigidity. The three pieces are joined together to form the generally parabolic shape.
Abstract:
The present invention provides an orthodontic metal arch wire having a wire comprising a metal alloy, e.g., "shape memory" alloys, formed into an arch shape, and a metal layer provided on at least a portion of the wire such that an auxiliary part either is to or can be soldered to the metal layer. The metal layer provided on the arch wire can be a noble metal layer, e.g., gold, platinum, rhodium and palladium, or a layer of tin-nickel or palladium-nickel. An auxiliary part, such as a post, hook or loop, can then be soldered or brazed to the metal layer.
Abstract:
An orthodontic arch wire, comprising a continuous wire having a generally parabolic shape defining a principal plane, the wire having a bend extending substantially in the principal plane, the bend being located approximately midway along a length of the wire, and an orthodontic appliance employing the wire.