KR20140077436A - Crown mounting structure and mounting method of dental implant - Google Patents

Abstract

The present invention relates to a fixture and a method of engaging an abutment and a crown of a dental implant prosthesis including an abutment and a crown, wherein the abutment includes an upper abutment above the margin and a lower abutment below the margin, Wherein the upper abutment is provided with a chamfered surface having a width and an angle of a certain range from the margin and a taper protruding from the chamfered surface in a shape of a cone, Wherein the abutment and the crown are attached to each other after the gap adjustment projection is added or removed and the gap between the abutment and the crown is adjusted after the abutment and the crown are attached, Lt; / RTI >

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental implant prosthesis,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a coupling structure and an attachment method of an upper abutment and a crown in a dental implant prosthesis.

Generally, an implant implies a replacement that restores the original tissue when it is lost, but it refers to placing an artificial tooth substitute in a dentist. 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 after a while, but the dental implant prosthesis does not injure the surrounding tooth tissue and has the same function and shape as the natural teeth and does not cause cavities. have.

In addition, dental implant prostheses enhance the function of dentures in single-tooth restorations, as well as in partial and total toothless patients, 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.

Thus, the dental implant prosthetic treatment is divided into a gingival bone, namely, a surgical procedure for implanting a fixture on the alveolar bone, and a prosthetic procedure for attaching the tooth replacement to the implanted fixture by connecting the abutment.

There are a variety of procedures for the dental implant prosthesis. An example of the procedure is as follows. The dental implant prosthetic treatment method described below is a fixture level impression method for completing the model in the oral cavity by connecting impression copings in the oral cavity when the impression is made in the prosthodontic process.

First, drilling and tapping are performed on the alveolar bone to form a groove conforming to the dimension of the fixture, and a mount is fastened to the upper portion 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 in 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 ossification is somewhat different depending on the patient's bone quality and implantation position, but usually takes 3 to 6 months.

Next, the gums are opened through a secondary operation to expose the cover screw, check the degree of fusion of the fixture, and remove the cover screw. And a healing abutment is fastened to the top of the fixture for aesthetic gingival formation 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 the aesthetic gum formation is confirmed, the abutment abutment is removed, and the impression coping is fastened to the upper part of the fixture to make the prosthesis. The impression material is then used to create a preliminary impression in the mouth and remove impression copings.

Thereafter, a tooth model is prepared, an artificial tooth is pierced, an abutment is fastened to the top of the fixture, and an upper prosthesis (i.e., a crown) is fixed on the abutment to complete the implant prosthesis.

An object of the present invention is to improve the bonding strength by allowing the upper abutment and the crown to be maintained at a constant gap and to be combined.

Another object of the present invention is to provide a method of joining an upper abutment and a crown so that the upper abutment and the crown can be easily engaged even if a processing error occurs.

The present invention relates to a fixture and an abutment and a crown of a dental implant prosthesis including an abutment and a crown, wherein the abutment includes an upper abutment above the margin, which is in contact with the crown, and a lower abutment below the margin, Wherein the upper abutment has a chamfered surface having a width and an angle of a certain range from the margin and a taper protruding from the chamfered surface in a conical shape, and a gap adjusting protrusion, which contacts the inner surface of the crown, And an abutment and a crown coupling structure.

It is preferable that the side surface of the taper and the inner surface of the crown maintain a gap in the range of 0.02 to 0.1 mm.

The gap regulating protrusion may be integrally protruded from the side surface of the taper, or may be attached to the protrusion groove formed on the side surface of the taper.

At this time, a plurality of the gap adjusting protrusions may be radially formed.

According to the present invention, there is provided a method of joining an abutment and a crown of a dental implant prosthesis including a fixture and an abutment and a crown, wherein the abutment is provided with an upper abutment above the margin and a lower abutment under the margin, Wherein the upper abutment has a chamfered surface having a width and an angle of a certain range from the margin and a taper protruding in a conical shape from the chamfered surface, and the side surface of the taper has a gap Wherein the abutment and the crown are attached to each other after the gap between the abutment and the crown is adjusted by adding or removing the gap adjusting projection in the abutment and the crown, And a crown bonding method.

The upper abutment and the crown coupling structure according to the present invention can easily correct the errors in the machining errors, thereby allowing the upper abutment and the crown to be joined together.

In addition, the upper abutment and the crown coupling structure according to the present invention can adjust the distance between the upper abutment and the crown, thereby improving the durability and bonding force of the coupling portion.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the external shape and internal structure of a dental implant prosthesis,
Fig. 2 is a cross-sectional view showing a coupling structure of the upper abutment and the crown
3 is a cross-sectional view showing a coupling structure of a top abutment and a crown according to an embodiment of the present invention,
Fig. 4 is a sectional view of the case where the gap adjusting protrusion is separately attached;
FIG. 5 is a conceptual view illustrating adjustment using a gap adjusting projection when a deviation between a lower end of the crown and a margin line occurs. FIG.

Hereinafter, an abutment and a crown coupling structure of a dental implant prosthesis according to an embodiment of the present invention and a coupling method thereof will be described in detail with reference to the accompanying drawings.

1 is a view schematically showing an external shape and an internal structure of a dental implant prosthesis.

As shown in the figure, the dental implant prosthesis includes a fixture 110 inserted into the alveolar bone 10, a abutment 120 fastened to the fixture with a fastening screw 115, And a crown 130 that forms the contour of the implant prosthesis.

In the drawing, a portion below the one-dot chain line shows a cross-section, and a portion above the one-dot chain line schematically shows a side surface.

The crown 130 may be made of a precious metal alloy containing gold (Au), a non-precious metal or a semi-precious metal alloy containing no gold, a ceramic material, or a precious metal, a non- It can be manufactured using various dental materials such as precious metal or semi precious metal and ceramics together.

The contour of the crown 130 is determined using the teeth shape extracted by the patient, the shape of the mating teeth, and the like.

The inner surface of the crown 130 is formed in a shape corresponding to the contour of the abutment.

The coupling between the crown 130 and the abutment 120 is combined with the fitting by the shape and the adhesive force by the adhesive or the like.

However, as described above, the crown 130 is made of metal or ceramics including noble metal. The larger the volume of the crown 130 is, the more the machining cost and the cost are increased.

The present invention is to optimize the contour of the abutment to reduce the cost and to secure the abutment between the abutment 120 and the crown 130.

The abutment 120 can be divided into an upper abutment 120a and a lower abutment 120b based on a margin M that is a contact line with the crown 130. [

2 is a cross-sectional view showing a coupling structure of the upper abutment and the crown.

As shown in the drawing, the upper abutment 120a, which is the upper side of the margin M, is a portion coupled to the crown 130. [

The upper abutment 120a may be divided into the chamfer 122 and the taper 125 again.

The chamfer surface 122 is an annular curved surface defined by the margin M and the chamfer inner side line 121. The width CL of the chamfer surface 122 is preferably in the range of 0.1 to 2 mm. When the width CL of the chamfered surface 122 is less than 0.1 mm, the thickness of the lower end of the crown becomes narrow, so that the bonding area of the lower end of the crown and the chamfered surface 122 is narrow, so that the coupling force is weak and the load of the crown can not be properly dispersed.

 On the contrary, when the width CL of the chamfered surface 122 exceeds 2 mm, the thickness of the lower crown becomes unnecessarily thick, so that the cost increases, the amount of porcelain used in the build-up process using the porcelain increases, There is a drawback that cracks can occur. Also, if the build-up thickness of porcelain is excessive, the possibility of fracture due to occlusion is increased. In addition, when the metal crown is manufactured through casting, the internal temperature of the metal rises and the physical properties of the metal may be lowered.

The angle CAA of the chamfered surface 122 is an angle formed by the horizontal surface and the chamfered surface 122, and is preferably in the range of 45 to 60 degrees.

Since the external shape of the dental implant prosthesis is determined, the angle (CRA) of the lower end of the crown is determined by the angle (CAA) of the chamfered surface 122.

In the case of the outer surface of the crown lower end, the lower end of the tooth is in contact with the gum. The angle of this portion may be a vertical shape or a conical shape becoming narrower toward the lower end.

Therefore, in order for the angle (CRA) of the crown lower end to have an angle of about 45 degrees, the angle (CAA) of the chamfered surface 122 should be within the above range. If the lower end of the crown has an angle of about 45 degrees, it is possible to secure an area where the chamfer surface and the bottom of the crown are seamed, and the damage of the lower end of the crown and the edge of the chamfer can be prevented.

The inner surface of the crown 130 has a shape corresponding to the contour of the upper abutment 120a while maintaining a certain level of spacing. At this time, the gap G is preferably in the range of 0.02 to 0.1 mm.

If there is an error of less than 0.02 mm, it may be difficult to bond the crown if a processing error occurs, and the bonding force may be weakened due to insufficient space for the adhesive to be injected. On the contrary, a gap exceeding 0.1 mm causes a problem of lowering the bonding force.

It is most preferable that the crown is engaged with the upper abutment while keeping the gap. In the conventional case, since the crown is fixed by simply applying the adhesive, there is a problem that it is difficult to secure a uniform gap.

3 is a cross-sectional view illustrating a coupling structure of a top abutment and a crown according to an embodiment of the present invention.

As shown in the drawing, the present invention includes a plurality of gap adjusting protrusions 127 on the side surface of the taper so that the gap adjusting protrusion 127 is brought into close contact with the inner surface of the crown, thereby adjusting the gap between the upper abutment 120a and the inner surface of the crown .

A plurality of gap regulating protrusions 127 may be radially provided to adjust the distance between the crown and the upper edge of the crown so as to match the margins of the lower edge of the crown and the upper edge of the crown.

The gap regulating protrusion 127 may be integrally formed with the taper at the time of processing the taper, or may be formed separately after being processed.

4 is a cross-sectional view of the case where the gap adjusting protrusion is separately attached.

A protrusion groove 127a may be formed in the side surface of the taper and a gap adjusting protrusion 127 may be separately formed in the protrusion groove.

At this time, as the material of the gap adjusting protrusion 127, a resin used in dentistry or the like may be used, and other kinds of synthetic resin or the like may be used.

FIG. 5 shows the adjustment using a gap adjusting projection when a deviation between a lower end of the crown and a margin line occurs.

As shown in the left side, when the lower end (solid line) of the crown and the margin (dotted line) at the lower end of the upper region have a positional deviation, a gap adjusting projection is added or deleted at a proper position, Can be adjusted.

As described above, according to the present invention, there is provided a method of joining an abutment and a crown of a dental implant prosthesis including a fixture and an abutment and a crown, wherein the abutment is in contact with an upper abutment above the margin in contact with the crown, Wherein the upper surface of the taper has a chamfer surface having a width and an angle of a certain range from the margin and a taper protruding from the chamfer surface in a conical shape, The abutment and the crown may be attached or detached by adjusting the distance between the abutment and the crown and then the abutment and the crown are bonded to each other, Abutments and crowns can be combined with a certain level of spacing The.

110: Fixtures
120: abutment
120a: Upper abutment
120b:
M: Margin
130: Crown
127: gap regulating projection
127a: projection groove

Claims (7)

The fixture and abutment of the dental implant prosthesis including abutment and crown,
Wherein the abutment has an upper abutment on the upper side of the margin which is a contact line with the crown and a lower abutment on the lower side of the margin,
Wherein the upper abutment has a chamfered surface having a width and an angle of a certain range from the margin and a taper protruding from the chamfered surface,
Wherein the side surface of the taper has a gap adjusting protrusion that contacts the inner surface of the crown.
The method according to claim 1,
Wherein the side surface of the taper and the inner surface of the crown are spaced from 0.02 to 0.1 mm.
The method according to claim 1,
Wherein the gap regulating protrusion is integrally protruded from a side surface of the taper.
The method according to claim 1,
The gap regulating projection
Wherein the abutment member and the crown coupling structure are attached to the projection groove formed on the side surface of the taper.
The method according to claim 1,
And a plurality of gap regulating protrusions are formed radially.
A method of combining an abutment and a crown of a dental implant prosthesis including a fixture and an abutment and a crown,
Wherein the abutment includes a top abutment above the margin that is a line of contact with the crown and a bottom abutment below the margin, wherein the abutment has a chamfer surface having a width and angle from the margin, Wherein the taper has a protruding shape and the side surface of the taper has a gap adjusting protrusion contacting the inner surface of the crown,
Wherein the abutment and the crown are attached to each other by adding or removing the gap adjusting protrusion and adjusting the distance between the abutment and the crown.
The method according to claim 6,
Wherein the side surface of the taper and the inner surface of the crown form an interval of 0.02 to 0.1 mm.

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