Abstract:
The invention describes a composite palatal arch for the correction of the position of teeth, which is built up from a plurality of wire sections (1, 2, 3, 4, 5) made from different materials. One of the materials is a shape-memory alloy that assumes a superelastic state at the temperatures prevailing in a human mouth. The palatal arch comprises two end sections (2, 3), which are intended to fix the palatal arch in a tooth lock (16, 17) and which are made from of a normal-elastic material. The superelastic section (4, 5) of the arch is softer than are the normal-elastic sections (1, 2, 3). The superelastic material is present only in two intermediate sections (4, 5) between the two end sections (2, 3) and a central section (1), the two intermediate sections (4, 5) are each arranged adjacent one of the end sections (2, 3), and the central section (1) of the palatal arch consists of a normal-elastic material.
Abstract:
An improved dental appliance system, and methods for using and fabricating the improved appliance, including a polymeric overlay or shell having a teeth-receiving cavity formed therein. The dental appliance having the necessary stiffness or strength to firmly secure the appliance on the teeth and provide controlled forces required for repositioning the teeth, until such time as removal of the appliance is desired. The appliance may be configured for use with a removal mechanism. The removal mechanism provides for selective release of the appliance from the teeth as the removal mechanism undergoes a state change stimulated by an environmental stimulus or environmental switch.
Abstract:
An electromagnetically induced cutting mechanism which can provide accurate cutting operations on both hard and soft materials is disclosed. The electromagnetically induced cutter is capable of providing extremely fine and smooth incisions, irrespective of the cutting surface. Additionally, a user programmable combination of atomized particles allows for user control of various cutting parameters. The various cutting parameters may also be controlled by changing spray nozzles and electromagnetic energy source parameters. Applications for the, cutting mechanism include medical, dental, industrial (etching, engraving, cutting and cleaning) and any other environments where an objective is to precisely remove surface materials without inducing thermal damage, uncontrolled cutting parameters, and/or rough surfaces inappropriate for ideal bonding. The cutting mechanism further does not require any films of water or any particularly porous surfaces to obtain very accurate and controllable cutting.
Abstract:
An orthodontic appliance such as a bracket or buccal tube has a latch for retaining an archwire in an archwire slot. The latch releases the archwire from the archwire slot whenever the archwire exerts a force on the appliance that exceeds a certain minimum value. The minimum value is less than about one-half of the force required in the same direction to debond the appliance from the tooth, and thus reduces the likelihood that the appliance will unintentionally debond from the tooth during the course of orthodontic treatment.
Abstract:
A rinsing cannula (1) to rinse a root canal (2) of a tooth (3) having a supply channel for rinsing fluid. A proximal end area of the rinsing cannula (1) is connected to or connectable to a syringe or similar fluid supply and has at least one inlet opening (6), and a distal end area of the rinsing cannula (1) that is insertable into the root canal (2) in its position of use has at least one outlet opening (7) for the rinsing fluid. The distal end area of the rinsing cannula (1) is formed of titanium or a titanium alloy for flexible adaptation of the end area to the shape of the root canal (2) when it is inserted.
Abstract:
An improved dental appliance system, and methods for using and fabricating the improved appliance, including a polymeric overlay or shell having a teeth-receiving cavity formed therein. The dental appliance having the necessary stiffness or strength to firmly secure the appliance on the teeth and provide controlled forces required for repositioning the teeth, until such time as removal of the appliance is desired. The appliance may be configured for use with a removal mechanism. The removal mechanism provides for selective release of the appliance from the teeth as the removal mechanism undergoes a state change stimulated by an environmental stimulus or environmental switch.
Abstract:
Medical devices which are currently proposed to use elements made from shape memory alloys may be improved by the use of stress-induced martensite alloy elements instead. The use of stress-induced martensite decreases the temperature sensitivity of the devices, thereby making them easier to install and/or remove.
Abstract:
An orthodontic appliance such as a bracket or buccal tube has a latch for retaining an archwire in an archwire slot. The latch releases the archwire from the archwire slot whenever the archwire exerts a force on the appliance that exceeds a certain minimum value. The minimum value is less than about one-half of the force required in the same direction to debond the appliance from the tooth, and thus reduces the likelihood that the appliance will unintentionally debond from the tooth during the course of orthodontic treatment.
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:
A palatal arch expander assembly provides low, constant expansion forces to the palatal arch and provides individual corrective forces to either the first or second molars. A shape memory or superelastic archwire can be cooled below its transition temperature so that it is easily bendable for insertion into the mouth. After insertion, the archwire warms to a temperature above its transition temperature and provides low, continual expansion forces throughout the treatment period without requiring further adjustment. A pair of adjustment wires are bendable and provide individual corrective forces to either the first or second molars. The adjustment wires can be readjusted at any point during the treatment period. The archwire can be formed from a nickel-titanium alloy wire or superelastic material and the adjustment wires can be formed from nicoloy, stainless steel, or similar metal wire.