TW201517880A - Porous dental implants - Google Patents

Abstract

Disclosed are porous dental implants, which include: a crown section that has an upper surface and a bottom surface, a junction disposed at the bottom surface of the crown section and having a solid body that has a upper surface and side surface with its upper surface being connected to the bottom surface of the crown section, a porous structure layer that has a plurality of pores, an outer surface and an inner surface, of which the inner surface covers the side surface of the solid body, and a screw section disposed at the outer surface of the porous structure layer and having a plurality of peaks and valleys with the valleys being the outer surface of the porous structure layer and the plurality of pores being distributed between any two peaks.

Description

Porous dental implant

The present invention relates to a dental implant, in particular to a porous dental implant having a porous structure in a valley portion of a threaded section. The porous dental implant is integrally formed, has a stable structure, and is easily fixed to the alveolar bone, and is provided. The porous structure of the valley portion of the threaded section provides a stable bone contact surface for the bionic bracket formed by the bone.

In the prior art, after the artificial root is implanted into the alveolar bone of the edentulous patient, the osseointegration process must be performed to wait for the alveolar bone and the implant to be in close contact with each other. At present, the dental implant surface is subjected to a surface treatment process such as sand blasting. The surface is formed into a rough surface, which facilitates the attachment of tiny holes to the cells.

Referring to FIG. 1A, FIG. 1A is a perspective exploded view of a prior art. As shown in US Pat. No. 8,231,387 B2, an implant includes a shaft body 900 made of a porous material. The shaft body has a shaft body. An outer surface for engaging with a threaded body 901 made of a non-porous material, the upper end of which is coupled with a crown 903; accordingly, the thread body provides good strength and is porous in use. The shaft body made of the material can provide a bone-integrating environment for promoting bone growth, but the shaft body 900 and the threaded body 901 need to be separately formed, and the phase In order to maintain a stable appearance of the threaded body, it is necessary to maintain sufficient stability of the threaded body, and the process is complicated and costly.

In addition, please refer to FIG. 1B, which is a perspective exploded view of the prior art. In the prior art, as disclosed in US Pat. No. 2011/0123951 A1, an implant device is provided, including: an outer portion 910, and the outer portion is formed. An outer surface of the implant device and made of a porous material joined through a core portion 912 of the outer portion 910 and an inner portion, the inner portion including an outer surface having a treated region, the treated region Accessible from an external surface through the channel, the treated area having a treatment for direct attachment to bone or soft tissue, structurally, the outer portion 910 is constrained to the head of the core and the anchor However, the core portion 912 must further be provided with an anti-rotation connection device to avoid the stability of the bone bond due to the rotation of the outer portion 910; in addition, the invention is integrated into a plurality of members, the outer portion of which is external The surface does not have a thread, so that when the implant is implanted into the alveolar bone, only the head and the anchor can be combined with the alveolar bone, and the idling affects the stability and the reliability of the joint, or Due to insufficient adhesion of the alveolar bone, the implant device is easily spun off from the alveolar bone and falls off.

In addition, please refer to FIG. 1C, which is a perspective exploded view of a prior art. A modular dental implant includes a body portion 920 and an outer sleeve. US Patent Application No. 2012/0156646 A1. 921 and a bottom crown 922. A porous material that can be formed in the outer sleeve, for example, to promote bone ingrowth. Positioning the surrounding core portion at the outer sleeve 921 and An end cap is coupled to the core of the body portion 920 such that the body between the sleeve head and the end cap are positioned. The invention can only rely on the design of the combination of the head and the anchoring portion and the alveolar bone, and improves the stability and the reliability of the coupling due to the idling, and avoids the insufficient adhesion of the alveolar bone, thereby making the implantable device easy to be toothed. When the trough is spun out and falls off, the design of preventing rotation relatively reduces the area of contact between the porous structure and the tissue, and the volume of the screw on the anti-rotation surface is too small, and the rotation of the implant is performed. It is easy to have fragmentation when implanting.

However, in the prior art, the effect of the implant and the bone contact is still limited, and the periodontal tissue must be well received and adhered to the implant, and the artificial root can bear the chewing bite force like the real tooth.

The object of the present invention is to provide a porous dental implant which is a dental implant integrally formed with a porous structure. When a porous dental implant is implanted into the alveolar bone, a porous structural layer exposed in the valley of the thread segment will be provided. Stable bone contact surface.

A porous dental implant of the present invention comprises: a crown having a crown upper surface and a crown lower surface; and an engaging portion disposed on the lower surface of the crown, comprising: a solid body; having a solid upper surface and a solid body side surface The solid upper surface is connected to the lower surface of the crown; the porous structural layer has a plurality of holes, an outer surface and an inner surface, the inner surface of the porous structural layer is coated on the side surface of the solid body; and a threaded segment is disposed on the porous structural layer The outer surface, the thread segment includes a plurality of peaks and a plurality of valleys, and the valley portion is an outer surface of the porous structural layer. And a plurality of holes are arranged between the two peaks.

As described above, in one embodiment, the porous structural layer, the solid body, and the threaded section are integrally formed.

As described above, in an embodiment, a blind hole may be further disposed on the upper surface of the crown, and the internal side surface of the blind hole is provided with an internal thread structure to provide abutment teeth (not shown) to stably engage the tooth mold (not shown). Show).

As described above, in one embodiment, the solid body is further columnar or tapered, and the outer surface of the porous structure layer is tubular, columnar or tapered.

As described above, in one embodiment, the plurality of holes are communicated from the outer surface to the through holes of the inner surface, and the plurality of holes are tubular structures.

As described above, in one embodiment, the crown and the engaging portion are integrally formed.

As described above, in one embodiment, the joint portion and the crown portion of the present invention are formed by laser sintering.

The porous dental implant of the present invention is an integrally formed porous dental implant. When the porous dental implant is implanted into the alveolar bone, the porous structural layer exposed in the valley of the thread segment will provide stable bone contact. It helps bone tissue to grow, increases osseointegration speed and shortens osseointegration time.

The porous dental implant of the present invention causes bones to grow inward into the porous structural layer of the porous dental implant, and the bone and the implant combine to form a three-dimensional osseointegration, providing a bearing structure required for the force, and a three-dimensional space thereof. Bone integration distributes pressure evenly, effectively resisting vertical pressure, horizontal tension and rotation The direction caused by the shear force moves.

The present invention can be applied to a one-piece or two-piece implant design, and is formed using titanium or a titanium alloy, but the present invention is not limited thereto and may be any metal material.

The invention adopts the laser sintering and forming technology to integrally form, and the surface of the implant can be roughened without using spray coating or surface processing such as sand blasting or acid etching, and the invention has the advantages of customization, not only saving Materials can effectively reduce production costs and shorten processing time.

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the following description will be made in conjunction with the accompanying drawings.

1‧‧‧Multi-hole dental implants

2‧‧‧ crown

21‧‧‧Top surface of the crown

22‧‧‧The lower surface of the crown

23‧‧‧ internal thread

5‧‧‧Connecting Department

6‧‧‧ Solid body

61‧‧‧ Solid body side surface

62‧‧‧ Solid upper surface

7‧‧‧Porous structural layer

71‧‧‧Outer surface

72‧‧‧ inner surface

73‧‧‧ hole

8‧‧‧Threaded section

81‧‧‧ Peak

82‧‧‧ Valley Department

9‧‧‧Blind hole

900‧‧‧Axis

901‧‧‧ thread body

903‧‧‧ crown

910‧‧‧Outer part

912‧‧ ‧ core

920‧‧‧ body part

921‧‧‧Outer sleeve

922‧‧‧Bottom crown

Figure 1A is an exploded perspective view of U.S. Patent No. 8,231,387 B2.

Figure 1B is an exploded perspective view of the prior art U.S. Patent No. 2011/0123951 A1.

Figure 1C is an exploded perspective view of the prior art U.S. Patent Application No. 2012/0156646 A1.

Figure 2 is a side view of a porous dental implant of the present invention.

Figure 3 is a cross-sectional view of a multi-hole dental implant of the present invention.

Figure 4 is a diagram of a porous dental implant application of the present invention.

Referring to FIG. 2, FIG. 2 is a side view of a porous dental implant of the present invention. The present invention is a porous dental implant 1 comprising: a crown 2 and an engaging portion 5.

Please refer to FIG. 3. FIG. 3 is a cross-sectional view of a porous dental implant of the present invention. The present invention is a porous dental implant 1 comprising: a crown 2 having a crown upper surface 21 and a crown lower surface 22; and an engagement portion 5 disposed on the crown lower surface 22.

In one embodiment, the porous structural layer, the solid body, and the threaded section are integrally formed.

In an embodiment, a blind hole 9 is further disposed on the upper surface 21 of the crown 2, and an internal thread 23 is disposed on the inner side of the blind hole 9 for providing abutment teeth (not shown) for stably engaging the tooth mold. (not shown).

In an embodiment, the engaging portion 5 includes a solid body 6, a porous structural layer 7, and a threaded segment 8. The solid body 6 has a solid upper surface 62 and a solid body side surface 61, and the solid upper surface 62 is joined to the crown lower surface 22. The solid body 6 is columnar or tapered. The solid upper surface 62 of the solid body 62 is square or circular, and the embodiment is not limited thereto, and the solid upper surface 62 is of any geometric shape.

The porous structural layer 7 is a bionic scaffold structure, and the bionic scaffold structure generally refers to a scaffold of a bone-like trabecular structure, which is a technical term in the art, and is not described in detail; the porous structural layer 7 has a plurality of The hole 73, the outer surface 71, and the inner surface 72, the inner surface 72 is covered on the solid body side surface 61.

The porous structural layer 7 may be tubular, columnar or tapered, The porous structural layer 7 has a plurality of holes 73, preferably through which the outer surface 71 communicates with the through holes of the inner surface 72, and the plurality of holes 73 of the present embodiment may have a tubular structure. The tubular structure is a diamond-shaped tubular structure, a square tubular structure, or a circular tubular structure, but the embodiment is not limited thereto, and further includes a tubular structure of any geometric shape.

Wherein, the pore size of the plurality of holes 73 is preferably an average pore diameter of the bone-like trabecular structure, so that the bone cells are more likely to grow in the plurality of holes 73, thereby accelerating the bone tissue integration effect; the porous structure layer The thickness of 7 can be adjusted depending on the strength requirements of the dental implant to better maintain the overall strength of the dental implant and promote bone cell growth.

The threaded section 8 is disposed on the outer surface 71 of the porous structural layer 7, and includes a plurality of peaks 81 and a plurality of valleys 82. The valleys 82 are outer surfaces 71 of the porous structural layer 7, and are disposed between any two peaks 81. The plurality of holes 73.

In an embodiment, the solid body 6, the porous structural layer 7, and the threaded section 8 are integrally formed.

In an embodiment, the crown 2 and the engaging portion 5 are integrally formed.

The connecting portion 5 and the crown portion 2 are formed by fusing and sintering metal powder by laser sintering molding technology, which can simplify the process and save materials without forming a rough surface through coating or surface treatment.

Integral porous dental implant, when implanted into the alveolar bone, the peak 81 of the threaded segment 8 locks into the bone to provide initial stability of the implant, which is revealed in the snail The porous structural layer 7 of the valleys 82 of the segments 8 will provide a stable bone contact surface which aids in the growth of bone tissue binding, increases the speed of osseointegration, and enhances the stability of the implant.

The porous dental implant of the present invention is an integrally formed porous structure. When the porous dental implant is implanted into the alveolar bone, the porous structural layer exposed in the valley of the thread segment will provide a stable bone contact surface, which helps Engagement in bone tissue increases osseointegration speed and shortens osseointegration time.

Please refer to FIG. 4. FIG. 4 is a diagram of a porous dental implant application of the present invention. The porous dental implant of the present invention in-growth bone into a porous structural layer of a porous dental implant, and the bone and the implant form a The osseointegration of the three-dimensional space provides the bearing structure required for the force. The three-dimensional osseointegration distributes the pressure evenly and effectively resists the direction caused by vertical pressure, horizontal tension and rotational shear.

The present invention can be applied to a one-piece or two-piece implant design, and is formed using titanium or a titanium alloy, but the present invention is not limited thereto and may be any metal material.

The invention adopts the laser sintering and forming technology to integrally form, and the surface of the implant can be roughened without using spray coating or surface processing such as sand blasting or acid etching, and the invention has the advantages of customization, not only saving Materials can effectively reduce production costs and shorten processing time.

In summary, it is merely described that the present invention is an implementation or embodiment of the technical means employed to solve the problem, and is not intended to limit the scope of implementation of the present patent. That is, in line with the scope of the scope of the patent application for this creation, Or equivalent changes and modifications made in accordance with the scope of this patent are covered by the scope of the creation of the patent.

1‧‧‧Multi-hole dental implants

2‧‧‧ crown

5‧‧‧Connecting Department

Claims (10)

A porous dental implant comprising: a crown having a crown upper surface and a crown lower surface; and an engaging portion disposed on the lower surface of the crown, comprising a solid body having a solid upper surface and a solid body side surface, the solid body upper surface being coupled to the lower surface of the crown; a porous structural layer having a plurality of holes, an outer surface, and an inner surface, the inner surface being coated on the solid body side surface; a threaded segment disposed on the outer surface of the porous structural layer, the threaded segment comprising a plurality of peaks and a plurality of valleys, the valley portion being an outer surface of the porous structural layer, and the plurality of peak portions are disposed between the plurality of peak portions Hole. The porous dental implant according to claim 1, wherein the porous structural layer, the solid body and the threaded segment are integrally formed. A porous dental implant according to claim 1, wherein the upper surface of the crown has a blind hole. A porous dental implant according to claim 2, wherein the blind hole has an internal thread structure. A porous dental implant according to claim 1, wherein the solid body is columnar or tapered. A porous dental implant according to the first aspect of the invention, wherein the porous structural layer is tubular, columnar or tapered. The porous dental implant of claim 1, wherein the plurality of holes are communicated from the outer surface to the through holes of the inner surface. The porous dental implant of claim 1, wherein the plurality of holes are tubular structures. A porous dental implant according to the first aspect of the invention, wherein the joint portion and the crown portion are formed by laser sintering. The porous dental implant according to claim 1, wherein the crown and the engaging portion are integrally formed.