JP3668660B2 - Bracket mounting core for orthodontics - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bracket mounting core used for orthodontic treatment.
[0002]
[Prior art]
In conventional orthodontic treatment, generally, a wire locking member called a bracket is bonded and fixed to the entire surface of the lower jaw, upper jaw or a part of the target tooth (or the back surface), and a wire is sequentially attached to each bracket. There is known a method of correcting a dentition by stopping and applying an external force in the left-right or up-down direction.
[0003]
A method called an indirect bonding system (IDBS) as shown in US Pat. No. 4,501,554 and drawings is known as a method for adhesively fixing the bracket to the optimum position of the teeth in the dentition. This method is, for example 2, as shown in FIG. 3, the dental cast 2 A type cavity molding than teeth of pre Me patients (however, only the lower jaw model in Figure 2, Figure 3, only the upper jaw model in FIG. 4 The bracket 1 is temporarily fixed at the optimal position on the peripheral surface of the model tooth 3 (shown respectively), and then the occlusal stopper 4 is adhered and formed on the upper surface and the back surface of the model tooth 3 using a thermoplastic resin.
[0004]
Since the occlusal stopper 4 has a soft impression material in the core 6 described below, it prevents pressure unevenness when pressing the core 6 and attaching the bracket 1 to the actual dentition. In addition to the purpose of increasing the accuracy of positioning, it is difficult to remove the core due to the soft impression material entering deeply into the irregularities and gaps between the teeth during vacuum suction of the thermoplastic resin plate during secondary core molding described later There is a purpose to prevent trouble.
[0005]
After the adhesion of the occlusal stopper 4 is formed, the dental material of the tooth model 2 is covered with an impression material made of a silicone rubber soft material, shaped by manual work, and then cooled and solidified for about 60 minutes. The molding of the primary core 6a is completed.
[0006]
After completion of the primary core molding, a hardened plate made of heat-softened thermoplastic resin such as vinyl chloride is placed on the tooth model 2 and vacuum suction is applied from the lower surface side to adsorb and coat the hardened plate on the outer peripheral surface. After that, by cutting off the extra space portion of the curing plate, the secondary core 6b is formed and cooled and solidified to roughly adjust the outer shape of the core 6.
[0007]
Next, the core 6 is removed from the tooth model 2 with the bracket 1 remaining in the core 6 and the surface is post-treated to complete the manufacture of the core 6.
[0008]
Bonding of the dentition bracket 1 in the actual oral cavity was performed by applying an adhesive to each bracket 1 remaining in the core 6 and the bracket bonding surface of the dentition, and then attaching the core 6 to the dentition. After that, press the outside to bond and fix the bracket 1 to each tooth in the dentition. After all the brackets are bonded, the cores are peeled off in the order of the secondary core and the primary core. Complete the bonding operation. After the bonding is completed, the orthodontic treatment is performed by interlocking and locking the brackets with the wires 7 in a state indicated by phantom lines in the tooth profile model 2 of FIG.
[0009]
[Problems to be solved by the invention]
However, the core used in the above-described conventional bonding work uses a soft impression material that easily fits the tooth surface as the primary core, and the secondary core is a “mold” in order to maintain positioning accuracy during bracket bonding. A method of using a relatively hard thermoplastic resin such as polyvinyl chloride to maintain a certain rigidity of the outer layer of the core as a jig, and adsorbing the softened resin plate to the outer periphery of the primary core after solidification by vacuum suction Was adopted.
[0010]
For this reason, it takes a long time (about 60 minutes) to completely solidify the primary core before forming the secondary core, and also requires a suction forming operation for forming the secondary core and an apparatus for that purpose. In addition, when the core is peeled off (demolded) after bonding, the primary core is almost broken (cracked) and the primary and secondary cores are separated. Bonding (rebonding) has drawbacks such as manual bonding, or the need to recreate the core of the part again. Such re-adhesion also causes a positioning error.
[0011]
[Means for Solving the Problems]
The present invention is intended to provide a core for solving the above-mentioned problems. First, rubber molded by covering the peripheral surface of a tooth model 2 having a correction bracket 1 attached to the peripheral surface. A core 6 made of a molding material having elasticity of resin or resin is formed by a primary core 6a that constitutes the inner surface side and a secondary core 6b that is covered with the primary core 6a and constitutes the outer peripheral surface side. In the prepared core, a relatively soft two-component mixed silicone impression material is used as a molding material for the primary core 6a, and the two-component mixed silicone impression material is made of a relatively hard two- component mixed silicone impression material before the primary core 6a is solidified. It is characterized in that the primary core 6a and the secondary core 6b are attached to each other at the cross section of the multilayer and integrally fixed by covering the molding material of the secondary core 6b.
[0012]
Secondly, the molding material of the primary core 6a is stretchable to such an extent that the inner peripheral surface of the primary core 6a is not damaged when the core is removed from the mold by leaving the bracket 1 fixed to the bracket attachment target site. It is characterized by being a material with elasticity .
[0013]
Third, the molding material of the primary core 6a and the secondary core 6b is made of a transparent material .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an explanatory view showing a core manufacturing process and its structure according to the present invention. In this example, the bracket 1 is temporarily bonded to the tooth model 2 (upper jaw side) shown in FIG. Until the coating is formed by the adhesion of the primary core 6a, the occlusal stopper is not adhered and formed before the bracket is temporarily attached. This is the same as the conventional manufacturing method described above, and the description of the common parts is omitted. .
[0015]
The molding material used for the primary core 6a is a relatively soft and transparent silicone impression material (vinyl polydimethylsiloxane is the main material). It has flexibility and elasticity that does not damage or tear when the core 6 is peeled off after bracket bonding. The “Puma Soft” (Shore hardness 35) from Rental (Germany) was used. In addition, it is also possible to use silicone impression material (mainly vinyl polydimethylsiloxane) “Odontosil 40” (Shore hardness 48) manufactured by Drave Datamitt (Germany) and “Emilma” manufactured by Matsukaze Co., Ltd.
[0016]
In each case, a two-component mixed type is ejected from a known mixing dispenser (not shown), molded with a fingertip, solidified to a semi-solidified state after a certain time (10 to 20 minutes) (complete solidification) After that, as shown in FIG. 1 (C), it is ejected from the outer peripheral surface in the same manner as described above by a two-liquid mixing and dispensing device (not shown), and the secondary core molding material is coated and adhered in the same manner as above. The secondary core 6b is formed and solidified with a fingertip.
[0017]
As described above, the secondary core material can be deposited and formed by fingertips manually without forming the secondary core material by vacuum suction. for the material of the core with a material with adherent to each other, primary, secondary of both cores integrally attached (contact adhesion) is formed,抱着state from the outer periphery by heating conventional thermoplastic resins as This is because the primary core 6a need not be fixed by the secondary core 6b.
[0018]
Furthermore, unlike the conventional case, it is not always necessary to form the occlusal stopper 4 with a relatively hard thermoplastic resin before the formation of the primary core 6a, since the secondary core 6b is not attached by vacuum suction. This is because the soft core material for the primary core does not cause difficulty in removal (demolding) by biting into the concave portion of the surface of the tooth profile model 2 with the strong press coating of the secondary core material.
[0019]
The molding material for the secondary core is a transparent and relatively hard silicone rubber-based impression material, “Odontosil 60” (Shore hardness 68) manufactured by Drave Dentamit (Germany) or “ Memosil CD "(Shore hardness 80) can be used, and all of them are preferably made of vinyl polydimethylsiloxane as a main material and the same material as the above-mentioned primary core molding material.
[0020]
In this way, by using a molding material similar to the primary core, and coating the secondary core molding material in layers before the primary molding material is solidified, the primary core and the secondary core as shown in FIG. integral contact bonding within both layer section is promoted.
[0021]
The core 6 formed as described above is actually bonded in the oral cavity by a method similar to the conventional method described above. At this time, the secondary core has a certain elasticity but is relatively hard. Therefore, the occlusal stopper 4 described above is not necessarily required. However, an operator accustomed to the use of the occlusal stopper may be provided as usual. In this case, the occlusal stopper is also left in the core when the next core is removed. The
[0022]
After attaching the bracket 1 to the periodontal surface by the above bonding, the entire core is peeled off (demolded) with the bracket 1 left on the tooth side. At this time, the primary core and the secondary core are separated from each other. In this case, it is peeled and removed as one piece without separation (when the occlusal stopper is provided, this is also one piece), and when rebonding as shown in FIG. Only 1 can be fitted and held in the recess on the inner surface of the core, and bonding can be performed in the same manner as the first bonding.
[0023]
【The invention's effect】
According to the present invention configured as described above, the solidification of the primary core is shortened, the use of a plate or vacuum device, the use of a heating device, or the like is not required for forming the secondary core, and the occlusal stopper is also provided. Since it is not always necessary, the entire manufacturing time can be shortened and the cost can be reduced.
[0024]
There is no deformation of the occlusal stopper due to the residual heat after heating the secondary core material during the formation of the secondary core or the line wax that may adhere to the formation of the adhesive overflow path. No cooling is required.
[0025]
In addition, since the primary and secondary cores are integrated, there is no separation between the primary and secondary cores when the core is removed, and there is no damage to the primary core material, and the first core can be reused for bracket rebonding. .
[Brief description of the drawings]
FIG. 1 is an operation explanatory diagram showing a core manufacturing method and configuration according to the present invention.
FIG. 2 is a divided perspective view showing a conventional core manufacturing method and configuration.
FIG. 3 is an enlarged cross-sectional view of a conventional core.
FIG. 4 is a partial perspective view showing a temporarily attached state of the bracket.
[Explanation of symbols]
1 Bracket 2 Tooth model 3 Model tooth 4 Occlusal stopper 6 Core 6a Primary core 6b Secondary core

Claims (3)

A core (6) made of a rubber-based or resin-based molding material molded by covering the peripheral surface of the tooth model (2) with the orthodontic bracket (1) attached to the peripheral surface; In the core formed by the primary core (6a) constituting the inner surface side and the secondary core (6b) covering the primary core (6a) and forming the outer peripheral surface side, the primary core (6a) is molded. using a relatively soft two-liquid mixing type silicone impression material as wood, molding material of the secondary core consisting of a relatively rigid two-liquid mixing type silicone impression material before solidification of the primary core (6a) (6b) A core for bracket mounting used for orthodontics, in which the primary core (6a) and the secondary core (6b) are adhered to each other in the multilayer cross-sectional portion and integrally fixed. Elasticity of the molding material of the primary core (6a) to such an extent that the inner peripheral surface of the primary core (6a) is not damaged when the core is demolded and removed while leaving the bracket (1) fixed to the bracket attachment target site. The bracket mounting core used for orthodontic treatment according to claim 1, which is a material having a certain elasticity. The bracket mounting core used for orthodontic treatment according to claim 1 or 2, wherein the molding materials of the primary core (6a) and the secondary core (6b) are both transparent materials.

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