JPH0634607U - Arch wire with orthodontic loop and wire connector - Google Patents

Abstract

(57) [Summary] [Objective] To obtain an archwire with an orthodontic loop, which is easy to manufacture by simple loop formation and is capable of generating a corrective force having an appropriate vector. [Structure] A portion including at least a loop is formed of a shape memory alloy wire that is formed into a single simple loop shape, is bent into a desired arch shape, and is heat-treated to maintain the looped arch shape.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to an elastic wire of a brace used for orthodontic treatment, that is, an arch wire with a loop.

[0002]

[Prior art]

 For the movement of teeth in conventional orthodontic treatment, elastic wires made of stainless steel, cobalt-chromium alloy, or nickel-chromium alloy, which are easy to bend, are bent to obtain appropriate orthodontic force and a wide range of action. A loop was formed and ligated to a bracket attached to the tooth to generate a force with a vector of direction and magnitude of correction.

[0003]

[Problems to be solved by the device]

 However, in order to obtain an appropriate correction force, it is necessary to bend and form a loop having a complicated shape such as a plurality of double loops as shown in FIGS. 1 (a) and 1 (b). It wasn't. Therefore, it requires skill in loop formation, and requires detailed and careful work and mental tension.

[0004] Although the loop shape can be simplified and the arch wire can be easily manufactured by using a super elastic wire having extremely high elasticity, such a super elastic wire is hard to be permanently deformed, and The bent shape cannot be maintained and the corrective force having an appropriate vector cannot be generated.

Therefore, a first object of the present invention is to obtain an archwire with a dental correction loop, which can be easily manufactured by simple loop formation and can generate a corrective force having an appropriate vector. is there.

A further object of the present invention is to provide a wire connector required for mounting additional equipment and bonding wires to each other so as to generate a corrective force and a corrective force on the archwire.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned first object, the archwire with an orthodontic loop according to the present invention makes at least a portion including a loop into a single simple loop shape, and bends it into a required arch shape, and heat-treats it. It is characterized by being composed of a shape memory alloy wire that maintains the arch shape with loops.

Further, in order to achieve the above-mentioned second object, the present invention has a substantially U-shaped cross section, and a longitudinal direction of the wire is obtained by tightening opposite ends of the U-shape. In the wire connector for clamping the periphery, the long side surface of the rectangular cross section of the wire is formed into an inner surface shape in which the end surfaces on both sides of the U-shape collide with each other to clamp.

[0009]

[Action]

 According to the archwire with an orthodontic loop of the present invention, since the shape memory alloy wire originally has superelasticity, it is extremely easy to simplify the loop shape, and moreover, by applying heat treatment after forming the loop, It is possible to maintain a loop shape that maintains an appropriate and wide range of correction force.

[0010] Superelastic shape memory alloy wire is not capable of forming a loop shape and an arch shape that match the shape of the dentition at the chair side and applying heat treatment to maintain this shape. Therefore, the wire joining device according to the present invention joins the loop portion made of the shape memory alloy wire and the ordinary elastic wire at the chair side.

Conventionally, wires used for orthodontics have been joined by brazing or welding. However, the shape memory alloy wire changes its physical properties during brazing or welding. Or wire bonding by welding is not acceptable. Since the wire joining device according to the present invention simply performs mechanical joining, joining can be performed without causing a change in physical properties of the shape memory alloy wire with a loop.

[0012]

【Example】

 Next, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 2 shows a bracket 1 for mounting on a tooth and guiding and supporting a wire for use in orthodontics, which bracket is elongated in the form of a rectangular cross section, ie a rectangular or square cross section. It has a slot 2 for guiding the wire. The dimensions a × b of this slot 2 are a = 0.46 mm (0.018 inch), b = 0.64 mm (0.025 inch), or a = 0.56 mm (0.022 inch), b = 0.71 mm (0.028 inch). It is common.

Since the archwire with loop according to the present invention uses a superelastic shape memory alloy, it is not a loop having a complicated shape as shown in FIG. 1 but a very simple shape as shown in FIG. A simple loop shape may be used. (A-1), (a-2), and (a-3) in Fig. 3 are open types in which the legs of the loop are open, and (b-1), (b-2), (b -3) is a closed type with the legs of the loop closed.

FIG. 4, FIG. 5, FIG. 6 and FIG. 7 show an embodiment in which the arch wire with loop 3 according to the present invention is applied to a dentition. (A) is a side view and (b) is a plan view seen from the occlusal surface. 4 is an open type horizontal type, FIG. 5 is an open type vertical type, FIG. 6 is a closed type horizontal type, and FIG. 7 is a closed type vertical type.

According to the present invention, in addition to the basic loop shape as shown in FIGS. 3 to 7, before and after the loop, it is bent into an arch shape for preventing unnecessary rotation and inclination of the tooth to be moved. To do. 8 and 9 (a-1) and (a-2) are examples in which the curvature near the loop is increased, and (b-1) and (b-2) in FIG. The examples in which the curvature is constant, (c-1) and (c-2) in FIG. 8, are examples having a linear arch incorporated in the root portion of the loop. However, (a-1), (b-1), (c-1) are front views of each archwire, and (a-2), (b -2), (c-2) are the tops of each archwire. It is a side view. FIG. 8 shows an example of an archwire having an open type loop, and FIG. 9 shows an example of an archwire having a closed type loop.

The bent shape of the loop and arch shape of the wire made of shape memory alloy can be obtained by restraining such a shape with a casting investment material and heat-treating at a temperature of 300 ° C to 600 ° C for 10 minutes to 40 minutes. Shape memory (shape maintenance) is possible. Further, it is also possible to energize during bending and use the heat generated by energization to cause shape memory.

An appropriate one is selected from the four basic loops shown in FIGS. 4 to 7 according to the symptom and used. 10 (a) and 10 (b) show an example in which an open type vertical type sectioned arch wire with a loop is used for centrifugal movement of the upper right canine, and FIGS. 11 (a) and 11 (b) show An example is shown in which an open vertical sectional arch wire with loop is applied to close the interdental space of the upper right canine. In each of FIG. 10 and FIG. 11, (a) is a side view and (b) is a plan view seen from the occlusal surface. In the basic loop form, a wire with bending to prevent rotation and inclination of teeth as shown in Figs. 8 and 9 or to reduce reaction applied to adjacent teeth is attached to the bracket as shown in Figs. 10 and 11. The loop is deformed and activated by wearing it, and the force that this loop tries to restore to its original shape is used as a correction force. The symmetrical shapes in Figures 10 and 11 are for the left upper jaw and the right lower jaw.

12 (a) and 12 (b) show an embodiment in which an arch wire is used over the entire dentition to close the space in the dentition. Also in this case, the four basic loop forms are provided with bends to prevent rotation and inclination of teeth or to reduce reaction applied to adjacent teeth as shown in FIGS. 8 and 9 (FIG. 12 (b)). reference).

A wire made of a superelastic shape memory alloy is difficult to be permanently deformed unless heat treatment is applied, and it is difficult to give a bend suitable for the shape of the dentition on the chair side, which simplifies clinical application. In order to achieve this, the parts other than the loop are made of ordinary elastic wire, and (a-1), (a-2), (a-3) and (b-1), (b-2), As shown in (b-3) and FIG. 14, the appropriately formed shape-memory alloy looped archwire 3 and the ordinary elastic wire 4 are joined by the wire joining tool 5. Figure 13 shows a sectioned archwire with loops used for part of the dentition, and Figure 14 shows a looped archwire over nearly the entire dentition.

Conventionally, as shown in FIG. 15, a wire connector of a type in which U-shaped inwardly-directed free ends abut each other on the long side of the cross section of the wire 6 to clamp the entire circumference of the wire. Only 7 were used. According to the present invention, as shown in FIG. 16, a wire joint of the type in which the U-shaped inwardly directed free ends abut each other on the short side of the cross section of the wire 6 and the whole circumference of the wire is clamped. The tool 8 is used to form a desired composite connector by combining the wire connectors 7 and 8.

FIG. 17 shows an embodiment of a composite joint formed by welding or brazing wire joints 8 which are vertically overlapped with each other and is used for joining wires 6 in parallel in the vertical direction. To do. The wire connector 7 can be superposed in this manner. Alternatively, such a connector may be manufactured in one piece by casting.

FIG. 18 shows an example of a composite connector in which the wire connectors 8 are placed back to back horizontally with respect to each other and is used to bond the wires 6 to each other horizontally and in parallel. The wire connector 7 can be juxtaposed in this way.

FIG. 19 shows an embodiment of a composite connector in which the size of the wire connector 7 or 8 is increased and the two wires are directly overlapped and bonded together.

FIG. 20 shows an embodiment of a joining tool for joining two wires in a straight line, and the outer diameter and the inner diameter are adjusted according to the size of the orthodontic wire.

FIG. 21 shows an embodiment of a composite connector used to join two wires at right angles to each other. Such a connector can also be manufactured in one piece by casting.

FIG. 22 shows an embodiment of a composite connector formed by welding or brazing the orthodontic tube 9 and the wire connector 7 or 8 in parallel or in direct contact with each other.

[0028]

[Effect of device]

 According to the present invention, since a wire made of a super elastic shape memory alloy is used, a bending wire having a simple loop shape can be formed, and the bent simple loop and arch shape are maintained by heat treatment. In addition, it is easy to manufacture, the tooth movement efficiency is improved, and the interval between visits to the hospital can be extended, which is convenient for the patient.

Further, by using the composite connector shown in FIGS. 19 to 22, the orthodontic wire is easily bonded, the chair time is shortened, and the treatment efficiency is improved without impairing the physical properties of the wire. be able to. Further, since the tube shown in FIG. 22 can slide with respect to the inserted wire, there is an advantage that various mechanics for orthodontic treatment can be easily adopted.

[Brief description of drawings]

FIG. 1 is a diagram showing a conventional arch wire with loop.

FIG. 2 is a perspective view of a bracket into which an orthodontic wire is inserted.

FIG. 3 is a diagrammatic explanatory view of an embodiment of a loop portion of an arch wire with a loop according to the present invention, in which (a-1), (a-2), (a-
3) is an example of the open type in which the loop legs are open, and (b-1), (b-2), and (b-3) are each the loop legs are closed. It is an example of a closed type.

FIG. 4 is an open-type horizontal embodiment in which an arch wire with a loop according to the present invention is applied to a dentition, (a)
Is a side view and (b) is a plan view seen from the occlusal surface.

FIG. 5 is an example of an open type vertical type in which an arch wire with a loop according to the present invention is applied to a dentition, (a)
Is a side view and (b) is a plan view seen from the occlusal surface.

FIG. 6 is a closed type horizontal embodiment in which a looped archwire according to the present invention is applied to a dentition, wherein (a) is a side view and (b) is a plan view seen from an occlusal surface.

7 is a closed vertical type embodiment in which a looped archwire according to the present invention is applied to a dentition, FIG. 7A is a side view, and FIG. 7B is a plan view seen from an occlusal surface.

FIG. 8 is a diagram showing a bent form of an arch wire having an open type loop, wherein (a-1) and (a-2) are examples in which the curvature near the loop is increased, and (b-1) ), (b-2)
Is an example in which the curvatures on both sides of the loop are constant, (c-1), (c
-2) is an example having a linear arch incorporated at the base of the loop, provided that (a-1), (b-1), (c-1)
Is a front view of each archwire, and (a-2), (b-2), (c-2) are top views of each archwire.

FIG. 9 is a diagrammatic explanatory view showing a bent form of an arch wire having a closed type loop, (a-1), (a-2)
Is an example in which the curvature near the loop is increased, (b
-1) and (b-2) are examples in which the curvatures on both sides of the loop are constant, and (c-1) and (c-2) are examples in which there is a linear arch built into the root of the loop. An example, where (a-1),
(b-1), (c-1) are front views of each archwire, (a-2), (b-2),
(c-2) is a top view of each archwire.

FIG. 10 is an example in which an open type vertical type sectional archwire with a loop is used for centrifugal movement of an upper right canine, (a) is a side view, and (b) is a plan view seen from an occlusal surface. is there.

FIG. 11 is an example applied to the interdental space closure of the upper right canine using an open type vertical sectional arch wire with a loop, (a) is a side view,
(B) is a plan view seen from the occlusal surface.

12 (a) and (b) are schematic illustrations of an embodiment using an archwire over the entire dentition to close the space within the dentition, respectively.

FIG. 13 is a diagrammatic view of a joining wire obtained by joining a properly formed shape memory alloy looped archwire of a sectioned arched archwire used for a part of a dentition and a normal elastic wire by a wire joining device. It is an explanatory diagram, (a
-1), (a-2), (a-3) are examples of wires having open type loops, respectively, (b-1), (b-2), (b-3) are closed 3 is an example of a wire having a type of loop.

FIG. 14 is a diagrammatic illustration of an archwire with loops that spans nearly the entire dentition.

FIG. 15 is an explanatory diagram of a conventional wire connector of a type in which U-shaped inwardly directed free ends abut each other on a long side of a cross section of the wire to clamp the entire circumference of the wire; ) Is a perspective view before the inwardly directed free ends abut each other, (b) is a perspective view after the inwardly directed free ends abut each other, and (c) shows an inwardly directed free ends abutting each other. It is an end view before it makes it.

FIG. 16 is an explanatory view of a wire connector according to the present invention in a form in which U-shaped inwardly directed free ends abut each other on a short side of a cross section of the wire to clamp the entire circumference of the wire; (a) is a perspective view before abutting the inwardly directed free ends against each other, (b) is a perspective view after the inwardly directed free ends are abutted against each other, and (c) is a perspective view against the inwardly directed free ends. It is an end view before making it combine.

FIG. 17 is an explanatory diagram of an embodiment of a composite connector formed by welding or brazing wire connectors vertically overlapped with each other, FIG. The front perspective view, (b) is a perspective view after abutting the inwardly directed free ends.

FIG. 18 is an explanatory view of an example of a composite connector in which wire connectors are horizontally placed back to back with each other;
(A) is a perspective view before abutting the inwardly directed free ends against each other,
FIG. 6B is a perspective view after the inwardly directed free ends have abutted against each other.

19 (a) and 19 (b) are explanatory views of two types of embodiments of a composite connector in which the size of the wire connector is increased and two wires are directly overlapped and bonded together. FIG. 9 is a perspective view of the inward-oriented free ends before they abut each other.

FIG. 20 is a perspective view of an embodiment of a joining tool for joining two wires in a straight line.

21 (a) and (b) are perspective views of two embodiments of a composite connector used to join two wires, respectively, at right angles to each other.

FIG. 22 is a diagrammatic explanatory view of three kinds of examples of the composite joint formed by welding or brazing the orthodontic tube and the wire joint in parallel or orthogonal to each other.
(a-1), (b-1), (c-1) is a perspective view before clamping the wire of the composite connector, (a-2), (b-2), (c-2) [Fig. 3] is a perspective view showing a state in which a wire of the composite connector is clamped.

[Explanation of symbols]

 1 Bracket 2 Slot 3 Arch wire with loop 4 Elastic wire 5 Wire connector 6 Wire 7,8 Wire connector 9 Orthodontic tube

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[Procedure amendment]

[Submission date] October 28, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

FIG. 20

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[Figure 9]

[Figure 10]

FIG. 14

FIG. 15

FIG. 11

[Fig. 12]

[Fig. 13]

FIG. 16

FIG. 17

FIG. 18

FIG. 19

FIG. 21

FIG. 22

Claims (6)

[Scope of utility model registration request] 1. An archwire having an orthodontic loop, wherein at least a portion including a loop is made into a single simple loop shape, and is bent into a desired arch shape, and a heat treatment is applied to maintain the loop arch shape. An arch wire with an orthodontic loop, characterized in that the arch wire is composed of a shape memory alloy wire. 2. An archwire with an orthodontic loop according to claim 1, wherein the archwire is a sectional archwire. 3. The arch wire with an orthodontic loop according to claim 1, wherein the entire arch wire with a loop is made of a shape memory alloy wire. 4. The archwire with an orthodontic loop according to claim 1, wherein the looped portion made of a shape memory alloy wire and an ordinary orthodontic elastic wire portion are joined by a wire joining tool. 5. A wire connector having a substantially U-shaped cross-section, wherein the U-shaped cross section is clamped around the longitudinal direction of the wire by tightening the mutually facing inwardly directed ends of the U-shaped wire, and the wire rectangle. A wire connector characterized in that the side surface on the short side of the cross section is formed into an inner surface shape in which the end surfaces on both sides of the U-shape abut against each other and clamp. 6. A wire connector of a type having an inner surface shape in which end faces on both sides of a U-shape are clamped by abutting each other on a side face on a short side of a rectangular cross section of a wire, and a long side of a rectangular cross section of a wire. And a wire connector of a type having an inner surface shape in which end surfaces on both sides of the U-shape collide against each other and clamp each other on a side surface thereof, in a desired form.