JPH0550289B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blade-type intraosseous implant applied to dentistry.

[Conventional technology]

Conventionally used intraosseous implants made of, for example, titanium or Vitalium stainless steel are widely used because of their high mechanical strength. However, when implanted in the jawbone, adhesive bonding properties with the bone are poor, and therefore it is difficult to implant the implant while maintaining mechanical strength.

Therefore, in order to embed the implant in the bone with greater mechanical strength, the surface of the part of the implant itself where it is inserted into the bone is roughened, narrow grooves are formed vertically and horizontally, or holes are made that communicate with both sides. There were some cases in which a hole was drilled and bone was allowed to grow during the extraction.

[Problems to be solved by the present invention]

However, intraosseous implants are placed into a recess excavated in the jawbone, but the jawbone is generally
Since the width is relatively narrow at about 12 to 18 mm, thick intraosseous implants cannot be used, and the thickness of the intraosseous implant has to be as thin as about 1.5 to 2.0 mm.

Therefore, if an attempt is made to form a deeper groove on the side surface of the implant to increase the engagement with the bone, this will result in a decrease in the strength of the implant itself, and if the groove is shallow, it will cause a large engagement with the bone. The drawback was that no synergy could be expected.

As a result, conventional implants have little biting (engagement) even after bone augmentation, and the mechanical engagement force is insufficient, leading to the risk of settling into the bone, or causing phenomena such as looseness or dislodgement. It was hot.

[Means for solving problems]

As mentioned above, in order to prevent the occurrence of settling, rattling, and falling out of the bone, as well as to prevent a decrease in the strength of the implant itself, a plurality of elongated bodies are intersected three-dimensionally at the site where the implant is inserted into the bone. By having a three-dimensional structure with a large number of communication holes that communicate with both sides, it is possible to maintain a stronger engagement state after implantation into the bone, and to prevent the strength of the implant itself from decreasing. This is what I did.

〔Example〕

Next, an example of a blade-type intraosseous implant (hereinafter simply referred to as an implant) according to the present invention will be specifically described with reference to the drawings.

The implants according to the present invention are made of Vitalium, stainless steel,
The implant 1 is made of titanium or a titanium alloy, and the implant 1 has a post part 3 integrally formed with an intraosseous insertion part 2 and a post part 3 approximately in the center thereof. As shown in the cross section, it has a three-dimensional structure C in which a plurality of elongated bodies N are intersected three-dimensionally to form a large number of communication holes H that communicate with both left and right sides.

In addition, FIG. B shows an implant in which two post parts 3a are formed for the intraosseous implantation part 2a, and FIG. C shows an implant 1 for front teeth.
Similarly, a three-dimensional structure C is formed on the side surface of the intraosseous implantation part 2b.

It is desirable that the elongated body N and the communication hole H formed in the bone embedded parts 22a and 2b of the implants 11a and 1b be provided on both sides as shown in the cross section in FIG. The shaped body N may have only one side.

Furthermore, the width W and thickness d of the elongated body N are as follows:
As a result of various experimental studies on the relationship between bone growth and mechanical engagement, a value of 0.15 mm or more, preferably 0.2 to 0.8 mm is suitable. The size of the communication hole H is also 0.2 to 0.8 mm.
is suitable.

Note that the planar shape of the elongated body N is not limited to the linear shape shown in the figure, but may also be curved, wavy, etc.
It may be a combination of various shapes, and the planar shape of the communicating hole H may be various shapes depending on the elongated body N.

Furthermore, as shown in the cross-sectional shape of the elongated body N in FIG.

An example of how the implant 1 is used as described above is
As shown in the cross-sectional view in FIG. 5, the intraosseous implantation part 2 is implanted in the jawbone B, and the artificial tooth crown D is attached to the part where the post part 3 protrudes from the gum S.

In addition, if the implant 1 (1a, 1b) is made of titanium or titanium alloy, the surface may be coated in order to have better biocompatibility and male resistance.
It is preferable to deposit an oxide film of TiO ₂ or the like to an appropriate thickness by an anodic oxidation method or the like.

〔Effect of the invention〕

As described above, according to the present invention, the three-dimensional structure C is formed on at least one side, preferably both sides, of the intraosseous insertion part of the blade-type intraosseous implant, so that these elongated bodies N are As a result of the engagement effect caused by the growth and intrusion of bone into the valley and the communicating hole N, and the increase in the contact area with the bone, the mechanical bonding force with the jawbone becomes large, which prevents it from falling out, rattling, and entering the bone. To provide an implant that can prevent the occurrence of sedimentation and the like and can provide stable occlusal performance over a long period of time.

[Brief explanation of the drawing]

FIGS. 1A, 1B, and 1C are side views showing an example of a blade-type intraosseous implant according to an embodiment of the present invention, and the black dots in the figures indicate the elongated body N on the opposite side. FIG. 2 is an enlarged sectional view taken along the line X-X in FIG. FIGS. 4A, 4B, 3C, 3D, and 4E are enlarged cross-sectional views showing examples of the shape of the elongated body H constituting the three-dimensional structure C formed on the side surface of the implant according to the present invention, and FIG. FIG. 1 is a cross-sectional view showing the implant according to the present invention installed in the jawbone. 1, 1a, 1b: Implant, 2, 2a, 2
b: Intraosseous implantation part, 3, 3a, 3b: Post part,
C: three-dimensional structure, H: communicating hole, B: jawbone, S: gingiva, D: artificial tooth crown.

Claims (1)

[Claims] 1. In an intraosseous implant integrally equipped with an intraosseous implantation part and a post part, the intraosseous implantation part has a large number of communication lines that communicate with both left and right sides by intersecting a large number of elongated bodies in three dimensions. A blade-type intraosseous implant that has a three-dimensional structure with holes.