KR102146263B1 - Orthodontic members and method for preparing same - Google Patents

Abstract

The present invention is a member for orthodontics, wherein the orthodontic member is a tube type, a hollow polygonal column type, a funnel type, a hollow truncated cone type, or a hollow polygonal pyramidal shape, and includes a water-soluble or biodegradable material. It relates to an orthodontic member. Thereby, by inserting a wire into the orthodontic member of the present invention and adhering to the teeth, it is possible to perform a dental correction procedure easily.

Description

Orthodontic member and its manufacturing method {ORTHODONTIC MEMBERS AND METHOD FOR PREPARING SAME}

The present invention relates to an orthodontic member and a method of manufacturing the same, and more particularly, to an orthodontic member capable of easily performing an orthodontic procedure without an orthodontic bracket during an orthodontic procedure, and a manufacturing method thereof.

A condition in which the teeth are not aligned or the state of the upper and lower interlocking is out of the normal position is called "malignant bite" and the treatment that corrects this is called orthodontic treatment. In the case of malocclusion, not only does it look good, but also causes disorders in pronunciation and mastication functions, so various orthodontic devices for holding malocclusion teeth are used.

Among them, the most representative orthodontic appliance is a bracket, which is used together with an orthodontic wire to move the teeth. Basically, the bracket has a function of guiding the teeth to slide along the wire while transmitting the restoring force generated by the wire that is bent in the form of a crooked dentition.

However, the bracket is very inconvenient because of its relatively large and complex structure, and the aesthetic is poor because the bracket is visible during treatment.

In order to compensate for these shortcomings, an orthodontic method using a mini tube and a wire in the form of a small hollow tube has been used, and such a procedure is described in Korean Patent No. 1,234,205'Tube for orthodontic treatment'.

However, the orthodontic method using a mini tube has the following fundamental problems.

First, it is very difficult to insert a wire into a tube having an inner diameter smaller than 0.5mm attached to an irregularly crooked tooth.

Second, since it is impossible to insert a wire from the back of the neck, the mini tube cannot be used for the posterior (molar), and can only be used for orthodontic treatment of a limited area of the anterior (front).

Therefore, there is a need to develop a method capable of a simple and universal orthodontic procedure while minimizing patient discomfort.

An object of the present invention is to provide a water-soluble or biodegradable orthodontic member.

Another object of the present invention is easy to insert a wire. It is to provide an orthodontic member that is easy to adhere to the tooth surface by using an adhesive and can easily perform orthodontic procedures.

Another object of the present invention is to dissolve or biodegrade after a predetermined period of time during orthodontic procedures to form a clearance between the wire and the adhesive, so that the teeth can slide along the wire and move, making the orthodontic member easy to move. Is to provide.

Another object of the present invention is to provide a method of manufacturing the orthodontic member.

According to an aspect of the present invention,

As a member for orthodontics,

The orthodontic member is a tube type, a hollow polygonal column type, a funnel type, a hollow truncated cone shape or a hollow polygonal pyramidal shape, and a member for orthodontics comprising a water-soluble or biodegradable material is provided.

The tubular orthodontic member may have an inner diameter of 0.2 to 1.0 mm and a thickness of 0.001 to 0.5 mm.

The hollow polygonal column type is an n-angle column type, and n may be any one of an integer of 3 to 20. Preferably, n may be a hollow quadrangular column of 4.

The cross section of the hollow polygonal column type orthodontic member is a hollow polygon, the diameter of a circle inscribed to the hollow polygon is 0.2 to 1.0 mm, and the thickness of the hollow polygonal column type orthodontic member is 0.001 to 0.5 mm Can be

The hollow polygonal pyramid type is a hollow n-corner shape, and n may be any one of an integer of 3 to 20.

The ratio (E/e, q) of the minimum inner periphery diameter (e) to the maximum inner periphery diameter (E) of the hollow truncated conical member for orthodontics may be 1<q≤10.

The cross section of the hollow polygonal pyramidal orthodontic member is a hollow polygon, and the ratio (F/f, p) of the minimum diameter (f) to the maximum diameter (F) of a circle circumscribed to the hollow polygon is 1<p≤ Can be 10

The funnel-shaped orthodontic member may have a form including a hollow truncated cone coupled to one end of a hollow cylinder.

A ratio (D/d, r) of the diameter (d) of the inner circumference of the hollow cylinder to the diameter (D) of the inner circumference of the hollow cone may be 1<r≦10.

The water-soluble or biodegradable material may include 100 parts by weight of a water-soluble or biodegradable polymer; and 1 to 200 parts by weight of a compound represented by the following formula (1).

[Formula 1]

In Formula 1

n is any one of an integer of 1 to 8.

The water-soluble or biodegradable polymer is gelatin, starch, cellulose, vegetable gum, modified starch, modified cellulose, carboxymethyl starch, hydroxymethylcellulose, carboxymethylcellulose, acrylamide, hydrolyzable polyacrylamide, polyvinylpi It may be at least one selected from rolidone, polyvinyl alcohol, polyethylene glycol, polypropylene glycol, biodegradable polyamide, biodegradable polyurethane, and biodegradable polyester.

The polyethylene glycol may be a solid having a weight average molecular weight of 1,000 to 100,000.

The biodegradable polyamide may be at least one selected from polylactic acid and modified polylactic acid.

The water-soluble or biodegradable polymer may include at least one selected from modified starch and vegetable gum.

The compound represented by Formula 1 may be at least one selected from sorbitol and glycerin.

The water-soluble or biodegradable material is gelatin 100 parts by weight; 5 to 100 parts by weight of glycerin; And 1 to 100 parts by weight of sorbitol; may contain.

The water-soluble or biodegradable material may further contain 1 to 250 parts by weight of purified water.

The gelatin may have a jelly strength of 30 to 500 Bloom, preferably 100 to 400 Bloom.

According to another aspect of the present invention,

(A) preparing a coating solution by mixing a water-soluble or biodegradable polymer, a compound represented by the following Formula 1, and purified water; (B) preparing a wire and preparing a coated wire by coating the coating solution on the surface of the wire; Drying the coating solution on the coated wire to prepare a composite including the wire and an orthodontic member including the wire in a hollow (c); And (d) manufacturing the orthodontic member by removing the wire from the composite.

[Formula 1]

In Formula 1

n is any one of an integer of 1 to 8.

Step (a) may include preparing a coating solution by mixing gelatin, glycerin, sorbitol solution and purified water.

The orthodontic member may be a tube type, a hollow polygonal column type, a funnel type, a hollow cone shape, or a hollow polygonal pyramid shape.

After step (a), it may further include a step (a-1) of maintaining the coating solution at a temperature of 50 to 100°C.

The step (a-1) may be performed for 2 to 6 hours.

It may further include a step (a-2) of maintaining the temperature at 50 to 65 ℃ after the step (a-1).

After step d, it may further include a step of treating the surface of the orthodontic member with oil (step d-1).

The present invention can provide a water-soluble or biodegradable orthodontic member.

The present invention is easy to insert the wire. It is easy to adhere to the tooth surface by using an adhesive, and it is possible to provide an orthodontic member that can easily perform orthodontic procedures.

The present invention dissolves or biodegrades after a predetermined period of time during orthodontic procedures to form a gap between the wire and the adhesive, so that the teeth can slide along the wire and move, thereby providing an orthodontic member for easy tooth movement.

The present invention can provide a method of manufacturing the orthodontic member.

1 is a schematic view of an orthodontic member according to an embodiment of the present invention.
2 schematically shows a side cross-section of a water-soluble tubular orthodontic member of the present invention and a conventional bracket or small hollow tube.
Figure 3 shows a clinical test process of orthodontics using the water-soluble tubular orthodontic member of the present invention.
Figure 4 shows the front and side photographs of the clinical test results of orthodontics using the water-soluble tubular orthodontic member of the present invention.
Figure 5 shows the results of orthodontics using a conventional bracket.
Figure 6 shows a picture of orthodontics using a conventional hollow tube type tube.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention.

However, the following description is not intended to limit the present invention to a specific embodiment, and in describing the present invention, when it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted. .

The terms used herein are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, elements, or combinations thereof described in the specification, but one or more other features or It is to be understood that the possibility of the presence or addition of numbers, steps, actions, elements, or combinations thereof is not preliminarily excluded.

1 is a schematic view of a tubular orthodontic member according to an embodiment of the present invention.

Hereinafter, with reference to Figure 1 will be described for the orthodontic member of the present invention.

The orthodontic member of the present invention is a tube type, a hollow polygonal column type, a funnel type, a hollow cone shape or a hollow polygonal pyramid shape, and includes a water-soluble or biodegradable material.

It is preferable that the tubular orthodontic member has an inner diameter of 0.2 to 1.0 mm, and a thickness of 0.001 to 0.5 mm.

In addition, the cross section of the hollow polygonal columnar orthodontic member is a hollow polygon, and the diameter of a circle inscribed to the hollow polygon is 0.2 to 1.0 mm. In addition, the thickness of the hollow polygonal columnar orthodontic member is preferably 0.001 to 0.5 mm. However, the inner diameter and diameter may vary depending on the diameter of the wire to be inserted into the hollow of the orthodontic member.

The hollow polygonal column type is an n-angled polygonal column type, and n may be any one of an integer of 3 to 20, preferably 4 to 15, more preferably any one of an integer of 4 to 8, Even more preferably, it may be a four-member hollow quadrangular column type.

The ratio (E/e, q) of the minimum inner periphery diameter (e) to the maximum inner periphery diameter (E) of the hollow cone-shaped orthodontic member may be 1<q≤10, preferably 2≤q≤ 5, more preferably 3≤q≤4 may be.

The cross section of the hollow polygonal pyramidal orthodontic member is a hollow polygon, and the ratio (F/f, p) of the minimum diameter (f) to the maximum diameter (F) of a circle circumscribed to the hollow polygon is 1<p≤ It may be 10, preferably 2≦p≦5, more preferably 3≦p≦4.

The hollow of the hollow polygonal pyramid is an n-cornered shape, and n may be any one of an integer of 3 to 20, preferably 4 to 15, more preferably any one of an integer of 4 to 8.

The funnel-shaped orthodontic member has a shape including a hollow truncated cone coupled to one end of the hollow cylinder, and the diameter of the inner periphery of the hollow cylinder compared to the maximum inner periphery diameter (D) of the hollow cone The ratio (D/d, r) of) may be 1<r≤10. The ratio may be preferably 2≤r≤5, more preferably 3≤r≤4. In addition, the funnel-shaped orthodontic member may have a shape including a hollow polygonal frustum coupled to one end of a hollow polygonal pyramid, and the maximum of a circle circumscribed to a hollow polygon, which is the cross section of the hollow polygonal pyramid. The ratio (C/c, s) of the minimum diameter (c) to the diameter (C) may be 1<s≤10, preferably 2≤s≤5, more preferably 3≤s≤4. .

A wire is inserted into the orthodontic member, and the wire wrapped by the member is adhered to the teeth using resin on the crooked teeth. A restoring force occurs in the wire that is bent and bonded in the form of a crooked dentition, and this is transmitted to the tooth as an orthodontic force capable of moving the tooth through the medium of the adhesive resin. At the same time, since the orthodontic member is water-soluble or biodegradable and melts in the oral cavity, a gap is formed between the wire and the resin, so that the tooth can move while sliding along the wire.

The water-soluble or biodegradable material may be any material that can be decomposed in the oral cavity, but may preferably include 100 parts by weight of a water-soluble or biodegradable polymer and 1 to 200 parts by weight of a compound represented by the following formula (1). .

[Formula 1]

In Formula 1

n is any one of an integer of 1 to 8.

The water-soluble or biodegradable polymer is gelatin, starch, cellulose, vegetable gum, modified starch, modified cellulose, carboxymethyl starch, hydroxymethylcellulose, carboxymethylcellulose, acrylamide, hydrolyzable polyacrylamide, polyvinylpi Rolidone, polyvinyl alcohol, polyethylene glycol, polypropylene glycol, biodegradable polyamide, biodegradable polyurethane, and biodegradable polyester are possible.

The polyethylene glycol is preferably a solid phase having a weight average molecular weight of 1,000 to 100,000.

The biodegradable polyamide may be polylactic acid or modified polylactic acid.

The water-soluble or biodegradable polymer may include modified starch and vegetable gum.

The compound represented by Formula 1 may be preferably sorbitol and glycerin.

The water-soluble or biodegradable material may more preferably contain 5 to 100 parts by weight of glycerin and 1 to 100 parts by weight of sorbitol based on 100 parts by weight of gelatin.

In addition, the water-soluble or biodegradable material may further include 1 to 250 parts by weight of purified water.

The gelatin may have a jelly strength of 30 to 500 Bloom, and preferably 100 to 400 Bloom.

The jelly strength is a typical physical property of gelatin. Bloom Value is used to indicate the strength of gelatin, and jelly strength is a gelatin solution of 6.67% according to the British Standard (BS 757), and the plunger of the jelly strength meter It can be defined as the force required when pressed to a depth of 4mm from.

Hereinafter, a method of manufacturing the orthodontic member of the present invention will be described.

First, a water-soluble or biodegradable polymer, a compound represented by the following formula 1, and purified water are mixed to prepare a coating solution (step a).

[Formula 1]

In Formula 1

n is any one of an integer of 1 to 8.

Step (a) may include preparing a coating solution by mixing gelatin, glycerin, sorbitol solution and purified water. The solvent of the sorbitol solution may be water.

After step (a), it may further include a step (a-1) of maintaining the coating solution at a temperature of 50 to 100°C. Step (a-1) may be preferably carried out at 55 to 95 °C, more preferably 60 to 90 °C.

In the above temperature range, the components of the coating solution may be evenly mixed.

Step (a-1) may be preferably performed for 2 to 6 hours, but may vary depending on the temperature of step (a-1). In addition, step (a-1) may further include a step of defoaming under vacuum.

After the step (a-1), the step (a-2) of maintaining the coating solution at a temperature of 50 to 65°C may be further included. Step (a-2) may be preferably carried out at 53 to 62 °C, more preferably 54 to 60 °C.

Next, a wire is prepared, and a coated wire is prepared by coating the coating solution on the surface of the wire (step b).

The coating in step (b) may be preferably performed at a gelling temperature of the coating solution or higher, but is not limited thereto. If the coating solution is above the gelation temperature, the coating solution may be uniformly coated on the wire.

The orthodontic member may be a tube type, a hollow polygonal column type, a funnel type, a hollow cone shape, or a hollow polygonal pyramid shape.

Next, by drying the coating solution on the wire coated with the coating solution, a composite including the wire and an orthodontic member including the wire in a hollow is prepared (step c).

The step (c) may be preferably performed at 25 to 30° C. and a relative humidity of 20 to 40%, but is not limited thereto. Step (c) may be performed until the coating solution reaches an equilibrium state, and if performed under the above conditions, it may be performed for 12 to 72 hours.

In step (c), the coating solution may be solidified into a gel close to a solid. It is preferable that the orthodontic member has the strength of maintaining the hollow while having flexibility not to be damaged even when the orthodontic wire is bent so that the orthodontic member is suitable for the arrangement of the teeth when applied to the orthodontic procedure.

Finally, the wire is removed from the composite to prepare an orthodontic member (step d).

After step d, it may further include a step of treating the oil on the surface of the orthodontic member (step d-1).

The oil may be mineral oil, silicone oil, vegetable oil, or the like.

On the other hand, in order for the operator to easily perform the procedure, it may be provided by inserting a wire into the orthodontic member.

[Example]

Hereinafter, a preferred embodiment of the present invention will be described. However, this is for illustrative purposes, and the scope of the present invention is not limited thereby.

Manufacturing example 1: Preparation of coating solution

After 430 parts by weight of gelatin (Geltek, 250 bloom) was dispersed in 390 parts by weight of water, 140 parts by weight of glycerin were added and mixed. Then, 5 parts by weight of a sorbitol solution (70% concentration) dissolved in water was added and evenly dispersed. Next, after passing through the gelatin dissolution process at 90° C. for 60 minutes, it was degassed in 700 mmHg vacuum at 65° C. for 30 minutes. The defoamed solution was aged at 60° C. for 6 hours to prepare a coating solution.

* Example 1: Preparation of a water-soluble tube as a member for orthodontics

The coating solution prepared according to Preparation Example 1 is placed in a supporting liquid container maintained at 45°C. A stainless steel straight wire having a length of 100 mm and a diameter of 0.5 mm was fixed with a fixing screw, and the wire was coated with paraffin. After the wire was loaded in the coating solution, it was immediately removed to coat the coating solution uniformly. Thereafter, after drying for 24 hours at a relative humidity of 25% at room temperature, the wire was removed to prepare an orthodontic member.

[Test Example]

clinical Test example 1: Orthodontics using a water-soluble tube, a member for orthodontics

The clinical test process of orthodontics using the water-soluble tube manufactured according to Example 1 is shown in FIG. 3, and the front and side photographs are shown in FIG. 4.

3 and 4, a nickel-titanium wire was inserted outside the oral cavity into the water-soluble tube prepared according to Example 1, and the tube into which the wire was inserted was directly adhered to the teeth. As a result, it was found that it can be applied to the posterior tooth.

Therefore, it was found that the water-soluble tube prepared according to Example 1 was aesthetically simple with a simple structure, and was comfortable and easy to maintain oral hygiene because there was no stimulation of soft tissues by the device.

Clinical comparison Test example 1: conventional Bracket Orthodontics using

FIG. 2 schematically shows a side cross-section of a water-soluble tubular orthodontic member of the present invention and a conventional bracket or a small hollow tube, and FIG. 5 shows the results of orthodontics using a conventional bracket.

Referring to FIGS. 2 and 5, a conventional bracket was bonded to the teeth and then a wire was bonded using a bonding tie to prevent the wire from falling out of the bracket. As a result, it was found that the bracket with a large and complex structure and its appendages irritated the soft tissues in the oral cavity.

Therefore, it was found that the conventional bracket is not aesthetically pleasing with a complex structure, and stimulates soft tissue in the oral cavity and makes it difficult to maintain oral hygiene.

Clinical comparison Test example 2: Hollow tube Orthodontics using shaped tube

6 shows a picture of orthodontics using a conventional hollow tube-shaped tube.

2 and 6, a conventional hollow tube-shaped tube was adhered to the teeth and then inserted to pass through the wires sequentially. As a result, since it is fundamentally impossible to insert a wire from the back of the neck, it was found that it can be applied only to partial orthodontic treatment limited to the anterior teeth.

Therefore, it was found that the hollow tube-shaped tube can be applied only to partial orthodontic treatment limited to the anterior teeth, and it takes a lot of time to insert the wire.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

Claims (17)

As a member for orthodontics,
The orthodontic member is a tube type, a hollow polygonal column type, a funnel type, a hollow cone shape or a hollow polygonal pyramid shape,
Contains water-soluble or biodegradable substances,
The water-soluble or biodegradable material
100 parts by weight of a water-soluble or biodegradable polymer; And
1 to 200 parts by weight of a compound represented by the following Formula 1;
That includes, orthodontic member.
[Formula 1]

In Formula 1
n is any one of an integer of 1 to 8. The method of claim 1,
The hollow polygonal column type is an n-angle column type, n is an orthodontic member, characterized in that any one of an integer of 3 to 20. The method of claim 1,
The cross section of the hollow polygonal columnar orthodontic member is a hollow polygon,
The diameter of the circle inscribed with the hollow polygon is 0.2 to 1.0 mm,
Orthodontic member, characterized in that the thickness of the hollow polygonal column type orthodontic member is 0.001 to 0.5 mm. The method of claim 1,
The hollow polygonal pyramid is a hollow n-corner shape, n is an orthodontic member, characterized in that any one of an integer of 3 to 20. The method of claim 1,
Orthodontic member, characterized in that the ratio (E/e, q) of the maximum inner periphery diameter (E) to the minimum inner periphery diameter (e) of the hollow truncated cone-shaped orthodontic member is 1<q≤10. The method of claim 1,
The cross section of the hollow polygonal pyramid type orthodontic member is a hollow polygon,
Orthodontic member, characterized in that the ratio (F/f, p) of the minimum diameter (f) to the maximum diameter (F) of a circle circumscribed to the hollow polygon is 1<p≤10. The method of claim 1,
The orthodontic member of the funnel-shaped orthodontic member, characterized in that the form including a hollow truncated cone coupled to one end of the hollow cylinder. The method of claim 7,
Orthodontic member, characterized in that the ratio (D/d, r) of the diameter (d) of the inner circumference of the hollow cylinder to the diameter (D) of the maximum inner circumference of the hollow truncated cone is 1<r≤10. delete The method of claim 1,
The water-soluble or biodegradable polymer is gelatin, starch, cellulose, vegetable gum, modified starch, modified cellulose, carboxymethyl starch, hydroxymethylcellulose, carboxymethylcellulose, acrylamide, hydrolyzable polyacrylamide, polyvinylpi Orthodontic member, characterized in that at least one selected from rolidone, polyvinyl alcohol, polyethylene glycol, polypropylene glycol, biodegradable polyamide, biodegradable polyurethane and biodegradable polyester. The method of claim 10,
Orthodontic member, characterized in that the polyethylene glycol is a solid phase having a weight average molecular weight of 1,000 to 100,000. The method of claim 10,
Orthodontic member, characterized in that the biodegradable polyamide is at least one selected from polylactic acid and modified polylactic acid. The method of claim 1,
Orthodontic member, characterized in that the water-soluble or biodegradable polymer comprises at least one selected from modified starch and vegetable gum. The method of claim 1,
The compound represented by Formula 1 is an orthodontic member, characterized in that at least one selected from sorbitol and glycerin. The method of claim 1,
The water-soluble or biodegradable material
100 parts by weight of gelatin;
5 to 100 parts by weight of glycerin; And
1 to 100 parts by weight of sorbitol;
Orthodontic member comprising a. The method of claim 15,
Orthodontic member, characterized in that the water-soluble or biodegradable material further comprises 1 to 250 parts by weight of purified water. The method of claim 15,
The gelatin is a member for orthodontics, characterized in that the jelly strength is 30 to 500 Bloom.

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