KR20140145014A - Cervical Shape Abutment for Dental Implant - Google Patents

Abstract

According to embodiments of the present invention, a cervical shape abutment for a dental implant comprises: a body unit combined on a fixture implanted on alveolar bone of teeth; and a combination unit prepared on the bottom of the body unit, wherein a tool groove dented and formed at predetermined depth from an upper surface is formed on an upper end part of the body unit as a stopper blocking rotation of the body unit can be installed.

Description

A Cervical Shape Abutment for Dental Implant of a Dental Implant [

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cervical abutment of a dental implant, and more particularly, to a cervical abutment of a dental implant which can compensate for an error in fixture placement and can obtain a result of implant treatment with improved esthetics .

Implant refers to a replacement that restores the original tissue when it is lost, but it refers to the implantation of an artificial tooth. To replace the lost root (root), a root made of titanium or the like which does not have a rejection reaction to the human body is planted in the alveolar bone that has passed through the tooth, and then the tooth is restored by fixing the artificial tooth.

In general prostheses or dentures, the surrounding teeth and bones are damaged over time, but the implants do not injure the surrounding dental tissue, and they have the same function and shape as the natural teeth, but do not have cavities. Therefore, they can be used semi-permanently.

Implants also improve the function of dentures in patients with single missing teeth restoration, as well as partial and total toothless teeth, and improve the aesthetic aspects of dental prosthesis restoration. Furthermore, it helps to stabilize the dentition as well as to disperse the excessive stress applied to the surrounding supporting bone tissue.

The dental implants are divided into a gingival bone, namely, a surgical procedure for implanting an implant on an alveolar bone, and a prosthetic procedure for attaching an artificial tooth by connecting an abutment to an implanted implant.

There are a variety of implants that can be used in a variety of ways.

First, drilling and tapping are performed on the alveolar bone to form a groove conforming to the size of the fixture, and a mount is fastened to the top of the fixture. Then, using a surgical handpiece, the fixture and mount are inserted into the alveolar bone, and then the mount is removed from the fixture, thereby implanting the fixture into the alveolar bone. The first operation is completed by fastening the cover screw to the top of the fixture and sealing the fixture.

The cover screw prevents bacteria and foreign substances present in the oral cavity from entering the fixture while waiting for the fixture's osseointegration. The duration of osseointegration differs somewhat depending on the patient's bone quality and implantation position, but generally, 3 to 6 months are avail- able.

Next, the gums are opened through the second operation to expose the cover screws, check the degree of fusion of the fixtures, and remove the cover screws. For aesthetic gingival formation, the healing abutment is fastened to the top of the fixture and waited for two to three weeks. In order to improve the complexity of such a second procedure, a first-aid procedure for fastening the healing abutment is omitted, omitting the process of fastening and removing the cover screw.

Next, after confirming the esthetic gingival formation, remove the abutment abutment, and fasten the impression coping on the fixture to make the prosthesis. The impression material is then used to create a preliminary impression in the mouth and remove impression copings.

Then, a tooth model is prepared, the artificial crown is pierced, the abutment is fastened on the fixture and the prosthesis, that is, the artificial crown is fixed on the abutment, to complete the artificial tooth.

In this way, a healing abutment is generally used for the aesthetic gingival formation during the implant procedure. Since the implant procedure is widely practiced and the technique is widely known and developed in recent years, the result of the implant procedure can be told among the patients as a result of the aesthetic after the implant procedure, and therefore the esthetic result is more important after the implant procedure have.

However, in the healing abutment according to the conventional example, a healing zone having a gum contact area of only a structure having a circular outer shape with a larger outer diameter from the lower end to the upper end has a limitation in the formation of an aesthetic gum.

In other words, although the cervical portion shapes have different shapes according to the extraction site, when a uniform healing abutment is used as in the conventional art, it is difficult to form an aesthetic gum because the gum contact area of the healing zone does not match the gums. Furthermore, since the gap between the implant and the gum causes the metal of the implant to be invisible, the aesthetic property may be considerably deteriorated and bacteria or foreign matter may invade, possibly causing contamination of the teeth and oral cavity after the implant treatment.

In order to improve the completeness of the implant treatment, the fixture, which becomes the root of the artificial tooth, must be accurately positioned at the position where the root of the existing natural tooth has been located. However, due to differences in the patient's dental condition, oral structure, It is not easy to place the fixture in the correct position. Particularly, in the case of the posterior teeth (molar teeth) located in the oral cavity, it is difficult to accurately place the fixture in the center portion where the root of the existing natural tooth was located, in comparison with the anterior teeth (front teeth).

Thus, if the fixture can not be accurately positioned in the center of the existing tooth, that is, in the central region of the cervical portion of the existing tooth, then the implant operation may be adversely affected and the gum formation may not be formed naturally even if the healing abutment is used. An artificial tooth may have an angular twist relative to a conventional tooth, and may have uneven teeth.

Also, when the abutment screw is fastened, it is necessary to prevent the abutment shaft from rotating.

Korea Public Utility Model 20-2011-0003333 Kyung Hee University Industry-Academy Collaboration 2012.10.29.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an implant treatment method and an implant treatment method which can easily prevent rotation, compensate for an error in fixture placement when an error occurs in alveolar bone fixation of a fixture, Shaped abutment of the dental implant.

According to an aspect of the present invention, there is provided a toothbrush comprising: a main body coupled to a fixture to be placed on a alveolar bone of a missing tooth; And an engaging portion provided at a lower portion of the body portion. A tool groove formed at a predetermined depth from an upper surface of the body portion is formed at an upper end of the body portion so that a stopper preventing rotation of the body portion can be mounted. A cervical spine can be provided.

Wherein the engaging portion compensates for an error of the fixture placed on the alveolar bone when the alveolar bone is coupled to the fixture so that a center portion of the maximum flat end face of the body portion is located at the center region of the cervical portion of the lost tooth, As shown in FIG.

The engaging portion may be integrally provided with the main body portion and may extend below the lower end portion of the main body portion at a position spaced apart by a predetermined distance from the central portion of the maximum flat end face of the main body portion.

The body portion is inserted through a screw hole formed to pass from the upper end of the body portion to the lower end portion of the coupling portion and is screwed into the fastening hole of the fixture to fix the body portion to the fixture.

The coupling portion may have a shape in which the radius of the outer circumferential surface is gradually increased toward the upper end so as to be inserted into the fastening hole formed inside the fixture and to be inserted into the fastening hole.

Wherein the engaging portion includes: a curved portion extending downward from a lower end of the main body portion and having an inwardly curved surface; And a straight section extending downward in the curved section and provided in a frusto-conical shape.

The engaging portion may be provided with an engaging portion having a polygonal cross section so as to engage with the engaging groove portion of the polygonal ring shape provided at the distal end portion of the engaging hole.

The tool groove may be formed in the shape of a four-leaf crover having a cross-section centered on the screw hole.

The body portion may have a contact surface corresponding to a cervical portion shape of the missing tooth.

The embodiments of the present invention are capable of easily restraining rotation and compensating for an error of fixture placement when an error occurs in the alveolar bone placement of a fixture, Like abutment of the implant can be provided.

1 is an exploded perspective view of a fixture and a ground in accordance with an embodiment of the present invention.
Figure 2 is a perspective view of the zone of Figure 1;
Figure 3 is a plan view of the zone of Figure 1;
Figure 4 is a side view of the zone of Figure 1;
Fig. 5 is a view showing a state in which the zone stock in Fig. 1 is coupled to a fixture,
(a) is a view showing an abutment applied to the posterior, and
(b) is a view showing the abutment which is applied to the transposition.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

Prior to the description of the drawings, the cervical portion of the dental implant according to an embodiment of the present invention, which will be described below, may include a fixture (not shown) before a final abutment for fixing an artificial crown is coupled to a fixture. To form a healing abutment to form an aesthetic gum.

1 is an exploded perspective view of a fixture according to an embodiment of the present invention, FIG. 2 is a perspective view of the abutment of FIG. 1, FIG. 3 is a plan view of the abutment of FIG. 1, Fig. 5 is a view showing a state where the abutment of Fig. 1 is coupled to a fixture, wherein Fig. 5 (a) is a view showing a abutment applied to a posterior portion, to be.

First, referring to FIG. 1, an example in which the healing abutment 20 according to an embodiment of the present invention is applied to a posterior (molar) will be described. After the drilling and tapping of the alveolar bone 1 of the missing tooth to form a groove conforming to the dimension of the fixture 10, the fixture 10 is inserted into the groove formed in the alveolar bone 1 . 1, when the groove formed in the alveolar bone 1 is formed at a position slightly deviated from the center of the cervical portion 3 of the extracted tooth, the position of placement of the fixture 10 is located in the center region of the cervical portion 3 It does not match. In this case, it is difficult for the conventional healing zone to conform to the central region of the cervical portion 3 of the existing tooth extracted from the contact surface of the gum 2 in the healing zone.

1 to 5, a healing abutment 20 according to an embodiment of the present invention includes a body portion 30 coupled to a fixture 10 that is placed on an alveolar bone 1 of a missing tooth, And a fixation error of the fixture 10 which is formed integrally with the main body 30 and is fixed to the alveolar bone 1 when the fixture 10 is engaged with the fixture 10, The body portion 30 and the engaging portion 40 are fixed to the fixture 10 so that the central portion of the maximum flat cross-section of the body 30 is positioned on the fixture 10, And an abutment screw 50.

The healing abutment 20 according to the present embodiment includes a body portion 30 and an engaging portion 40 which are integrally provided and a fixing portion 40 for fixing the body portion 30 and the engaging portion 40 to the fixture 10 And an abutment screw 50 as shown in Fig. However, the scope of the present invention is not limited thereto, and the body portion 30 and the engaging portion 40 may not necessarily be integrally formed, and the abutment screw 50 may be omitted, And may be fixed directly to the fixture 10 by the part 40.

The main body 30 according to the present embodiment has a contact surface 32 corresponding to the shape of the cervical portion 3 of a missing tooth. The body portion 30 has a cuff portion 31 which is exposed to the outside of the gum 2 when the fixture 10 is engaged with the upper end portion of the body portion 30 with respect to the contact surface 32, A gum forming portion 33 having a structure in which the diameter of the outer surface is reduced to a predetermined curvature from the upper end to the lower end corresponding to the shape of the cervical portion 3 is provided. For reference, a scale (not shown) may be provided on the outer circumferential surface of the cuff 31 from the upper end to the lower end. The scale may be used for measuring the height of the gum 2 to be contacted when the abutment 20 is attached to the fixture 10. [

The body portion 30 is standardized according to the shape of the cervical portion 3 of the extracted tooth region and can be selectively applied according to the extracted portion. That is, the healing abutment 20 according to the present embodiment is standardized by the main body portion 30 having the contact surface 32 corresponding to the shape of the cervical portion 3 according to the teeth type such as the front teeth and the molar teeth, And can be selectively coupled to the fixture 10 along the portion of the tooth extracted in the abutment abutment 20.

5 (a), in the case of the healing abutment 20 applied to the posterior molar teeth, the contact surface 32 of the body portion 30 and the gum forming portion 33 are formed to be wide The contact surface 32 of the body portion 30 and the gum forming portion 33 of the healing abutment 20 applied to the anterior transposition tooth are relatively narrow in width as shown in FIG. 5 (b) do. As described above, by using the healing abutment 20 corresponding to the shape of the cervical portion 3 of the extracted tooth, it is possible to form the gum 2 close to the shape of the previous gum 2.

In this embodiment, a tool groove 34 is provided for preventing rotation of the main body 30 due to friction on the seat surface when the abutment screw 50 is fastened.

The tool groove 34 is formed to be recessed to a predetermined depth from the upper surface of the main body portion 30a. In this embodiment, the cross section is formed in the shape of a four-leafed crover with the screw hole 60 as a center. However, the scope of the present invention is not limited to such a shape, As shown in FIG.

When the abutment screw 50 is fastened to the fixture 10, a stopper (not shown) having a tweezer-type foot is mounted on the tool groove 34 to fix the main body 30 to prevent rotation due to friction .

The engaging portion 40 is engaged with a fastening hole 11 formed on the inside of the fixture 10 as a portion extending downward from the gum forming portion 33 of the main body 30. [ The coupling portion 40 has a shape in which the radius of the outer circumferential surface increases toward the upper end portion, so that the depth of insertion into the coupling hole 11 can be limited. More specifically, the engaging portion 40 according to the present embodiment includes a curved portion 41 having a curved surface that is downwardly extended from the gum forming portion 33 of the main body 30 and has an inwardly concave shape, and a curved portion 41 And a straight section 42 provided in a frusto-conical shape.

As described above, the curved section 41 is provided between the straight section 42 and the gum forming section 33, and the round section is applied to the gum section 2 when the engaging section 40 is coupled to the fixture 10, Can be more advantageously prevented from being damaged.

The linear section 42 is a part that is completely inserted into the fastening hole 11 of the fixture 10. The linear section 42 of the fastening section 40 according to the present embodiment is provided with a hook section 43) are further provided. The engaging portion 43 is engaged with the hexagonal annular engaging groove 12 provided at the distal end of the fastening hole 11 of the fixture 10 so that the screw 50 of the abutment 20 is fixed to the fixture 10 , It prevents rotation of the main body 30 due to friction. The present invention is not limited to the hooking portion 43 and the latching groove portion 12 having a hexagonal structure. Unlike the present embodiment, the latching portion 43 and the latching groove portion 12 are rectangular Or an octagonal structure or the like.

The engaging portion 40 in this embodiment is suitably invented so as to be able to be coupled to an internal / submerged type fixture, but such engaging portion 40 may be designed appropriately according to the type of fixture to be engaged will be.

In detail, the fixture of a dental implant can be roughly classified into an external type and an internal type according to the manner in which the abutment is connected to the abutment. Depending on the depth of the fixture, And a non-submerged type which is exposed to the outside of the gum.

In this embodiment, as described above, the abutment 20 coupled to the internal / submerged type fixture 10 is illustrated, but the scope of the present invention is not limited thereto. In other words, unlike the present embodiment, the latching portion provided in the abutment caulking portion can be connected to an external / submerged type fixture. In this case, a latching portion may be provided on the inner wall of the screw hole 60 to be described later.

The engaging portion 40 is provided at a position extending downward from the lower end of the main body portion 30 at a position spaced by a predetermined distance from the center of the maximum flat end face of the main body portion 30 or the center portion of the contact surface 32 .

This is for correcting the positioning error of the fixture 10 as described above. For example, when a groove is formed at a position slightly deviated from the center of the cervical portion 3 of the extracted tooth and the fixture 10 is placed in the groove, the joint portion 32 positioned on the center axis line of the contact surface 32, The body portion 30 can not be brought into alignment with the cervical portion 3 of the extracted tooth when the tooth 40 is coupled to the fixture 10.

Therefore, the engaging portion 40 according to the present embodiment is provided at a position where the positioning error of the fixture 10 can be corrected, so that the fixture 10 can be positioned at a position slightly deviated from the central region of the cervical portion 3 The center portion of the contact surface 32 of the main body portion 30 can conform to the central region of the cervical portion 3. [ The position of the screw hole 60 formed on the central axis of the main body 30 and the engaging portion 40 will be described later in detail.

The abutment screw 50 is used to completely fix the integrally formed main body 30 and the engaging portion 40 to the fixture 10.

The abutment screw 50 is screwed to the fastening hole 11 of the fixture 10 in a state of being fitted to the body 30 and the engaging part 40. For this purpose, A screw hole 60 is formed in the vertical direction so that the abutment screw 50 can be inserted therein.

Referring to FIGS. 2 to 3, it is preferable that the screw hole 60 according to the present embodiment is provided such that the center of the screw hole 60 is within a range of 0 mm <B-A <3 mm and 0 mm <D-C <3 mm. As described above, the forming range of the screw hole 60 corresponds to the position of the engaging portion 40 that can compensate for the positioning error of the fixture 10.

In the present embodiment, the range of forming the preferable screw hole 60 is exemplified based on the posterior molar teeth. However, the forming range of the screw hole 60 can be further limited in the case of transposition.

 The screw hole 60 has a diameter different from that of the region passing through the body portion 30 and the region passing through the engaging portion 40. The engaging protrusion 61 is provided to form a step in the screw hole 60 because the diameter of the region passing through the engaging portion 40 is smaller than the diameter of the region passing through the main body 30. [

A screw thread 52 is formed on the outer circumferential surface of the abutment screw 50 and is screwed to the fastening hole 11 of the fixture 10 and the head portion 51 of the abutment screw 50 is made larger in diameter than the body, And is engaged with the engagement protrusion 61 of the hole 60. The head portion 51 of the abutment screw 50 may be provided with a groove formed to have a hexagonal cross section so that a hexagonal wrench for fastening or unfastening the abutment screw 50 to the fixture 10 may be mounted .

The healing abutment 20 according to the present embodiment having such a configuration not only forms the gum 2 having a more aesthetic appearance than the conventional one with the contact surface 32 corresponding to the shape of the cervical portion 3 of the extracted tooth, The positioning errors of the fixture 10 can be compensated.

As described above, according to the present embodiment, it is possible to compensate for the position error of fixture placement and to improve the completeness of the implant procedure by forming an aesthetic gum.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

1: alveolar bone 2: gums
3: cervical portion 10: fixture 11: fastening hole 12: abutment groove 20: abutment 30: main body 31: cuff portion 32: contact surface 33: gum forming portion 34: tool groove 35: post portion 40: engaging portion 41: 42: straight line section 43: latching portion 50: abutment screw 51: head portion 52: thread 60: screw hole 61:

Claims (9)

A main body coupled to a fixture that is placed in the alveolar bone of the lost tooth; And
And an engaging portion provided at a lower portion of the main body portion,
Wherein a tool groove formed at a predetermined depth from an upper surface of the body portion is formed at an upper end of the body portion so that a stopper preventing rotation of the body portion can be mounted. The method according to claim 1,
Wherein the engaging portion compensates for an error of the fixture placed on the alveolar bone when the alveolar bone is coupled to the fixture so that a center portion of the maximum flat end face of the body portion is located at the center region of the cervical portion of the lost tooth, And a cemented portion of the dental implant. 3. The method of claim 2,
The coupling portion
Wherein the protruding portion is provided under the lower end of the main body portion at a position spaced apart from the central portion of the maximum flat end surface of the main body by a predetermined distance. The method of claim 3,
And an abutment screw inserted through a screw hole penetrating from an upper end of the main body to a lower end of the engaging portion and screwed to a fastener of the fixture to fix the main body to the fixture, Shaped abutment. The method of claim 3,
The coupling portion
Wherein the fixture has a shape in which the radius of the outer circumferential surface gradually increases gradually toward the upper end so as to be inserted into the fastening hole formed in the fixture and to be inserted into the fastening hole. Abutment. 6. The method of claim 5,
The coupling portion
A curved section extending downward from a lower end of the main body part and having an inwardly concave curved surface; And
And a straight section extending downward in the curved section and provided in a frusto-conical shape. The cervical abutment of the dental implant according to claim 1, The method according to claim 6,
In the linear section of the coupling section,
And an engaging portion having a polygonal cross section is provided so as to engage with a polygonal ring-shaped engaging groove portion provided at a distal end portion of the fastening hole. 5. The method of claim 4,
The tool groove
And a crown-like abutment of a dental implant is provided in a cross-sectional shape with a four-leaf crown shape with the screw hole as a center. The method of claim 3,
Wherein,
And an abutment surface corresponding to a shape of a cervical portion of said missing tooth.

Images