JPH07328039A - Therapeutic upper structure for intraosseous implant - Google Patents

Abstract

PURPOSE:To provide an upper structure temporarily stuck to a gum penetration section during the period until gums are cured and recovered in the secondary surgery of the two-stage intraosseous implant having good operability. CONSTITUTION:This therapeutic upper structure fitted to an intraosseous implant through gums is provided with the outer face (diameter D4) 2a of an upper end section exposed in a mouth cavity, the outer face (diameter D8) 2b of a gum penetration tube section exposed in the mouth cavity in contact with gums, a portion 2c in contact with the upper face of the implant, a hole (slotted hexagonal hole) 2h coupled with a screw driver for fitting the upper structure, and a male screw section 2f screwed with the female screw section of the post hole of the implant. The outer diameter D4 of the upper end section exposed in a mouth cavity is made larger than the outer diameter D3 of the gum penetration tube section exposed in the mouth cavity in contact with gums to prevent the reproduction of the gums onto the top face (top face of tube) of the therapeutic upper structure during a gum curing period.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is a secondary operation for a double-dose intraosseous implant, which is a period until healing and recovery of the gingiva,
The present invention relates to a healing superstructure useful for temporary attachment to a gingival penetration part.

[0002]

2. Description of the Related Art At present, two types of intraosseous implants (hereinafter abbreviated as implants) in the dental field are known, which are a cylinder type and a blade type. Among these, the cylinder type implants having a cylindrical appearance shape are roughly classified into three types: a columnar shape, a conical shape, and a screw (including a taper screw). Further, the blade type has a plate-like appearance.

Further, as a method of implanting such an intraosseous implant, there are a "double-dose method" and a "single-dose method". In the former, the implant is completely implanted in the bone at the time of implantation (primary surgery), and after several months, the gingiva is incised and the superstructure is attached to the implant (secondary surgery). On the other hand, in the latter, the implant penetrates the gingiva at the time of implantation and is exposed in the oral cavity. Therefore, it is not necessary to incise the gingiva when the upper structure is attached.

In the former secondary surgery of the double implant method, after the gingiva is incised, the healing and recovery are waited (generally 1 to 6 weeks), and then the upper structure (crown portion) is attached. However, during this recovery period, the healing upper structure is temporarily attached to the incised gingival part. Without this, the gingiva would cover the implant again. healing,
After recovery, the healing superstructure is removed and a predetermined superstructure is attached. At this time, if the outer shape of the healing superstructure is made to have a shape similar to the gingival penetration portion of the predetermined upper structure to be mounted next, the upper structure is easy to mount and the upper structure after mounting And the adhesion and affinity of the gingiva are improved. However, if there is a gap between the upper surface of the implant and the lower surface of the healing upper structure, the gingival tissue will grow there, making it impossible to mount the upper structure. For this reason, there are usually several types of healing superstructures that have an appropriate height according to the thickness of the patient's gingiva (the extent of being slightly exposed from the upper edge of the gingiva into the oral cavity), Pure titanium is often used as the material, and the surface that contacts the gingiva is generally mirror-polished.

In fitting (connecting) the healing superstructure to the intraosseous implant, the fitting post portion of the healing superstructure is bonded to a post hole of the implant with temporary cement or a post hole. There is one that is screwed into the female screw formed in, and the latter screwing is now the mainstream. Further, in the commercially available healing upper structure, the post portion and the gingival piercing portion are constituted by one component. In particular, in the case of screwing, the gingival penetration portion of the healing upper structure serves as the head of the screw, and the top surface of the screw is rubbed with a cross, a hexagonal hole, and a square hole.

[0006]

However, in the case of the conventional healing superstructure that has been used so far, the tubular gingival penetration portion that comes into contact with the gingiva and the female screw of the post hole at the tip thereof are used. Although a male screw for screwing in is integrated, there is a disadvantage that the gingiva covers the top surface exposed in the oral cavity again during the healing period. As a measure to solve this problem, it is conceivable to increase the length of the cylinder exposed to the oral cavity, but the load due to occlusion etc. is applied to the implant and the upper structure for treatment during the healing period,
There was a problem of poor healing.

Therefore, the present invention solves the above-mentioned drawbacks of the prior art, prevents the gingiva from growing on the upper part in the healing process, and facilitates the secondary operation of the intraosseous implant, and
It is an object of the invention to provide a new healing superstructure, which can be perfected and has excellent operability.

[0008]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems by saying, "A healing upper structure for a double-dose intraosseous implant, which is a fitting portion to a post hole on the upper surface of the intraosseous implant. And a gingiva-penetrating cylinder portion, which is in contact with the gingiva, and has a diameter of an upper end portion which is exposed in the oral cavity is larger than a diameter of the gingival-penetrating cylinder portion which is exposed in the oral cavity. (Claim 1) "is provided.

Further, the present invention provides the above healing upper structure, wherein the diameter of the upper end portion exposed in the oral cavity is 0.5 mm or more larger than that of the gingival penetrating tubular portion that contacts the gingiva (claim Item 2) "or" the lower inner surface of the cylinder is a projecting upper structure fitting portion on the upper surface of the implant (for example, a cross-sectional shape perpendicular to the implant long axis is a circle, an ellipse,
It may be polygonal or the like and may be tapered. ) For accommodating), "the lower outer surface of the cylinder is a recessed upper structure fitting portion on the upper surface of the implant (for example, the cross-sectional shape perpendicular to the implant long axis is a circle). ,ellipse,
It may be polygonal or the like and may be tapered. )) "Healing upper structure (claim 4)", "Healing upper structure having a fixing screw part in the post hole fitting part and a rod tip at its end (claim 5) And "healing superstructures of titanium or titanium alloys (claim 6)".

[0010]

The upper structure for healing of the present invention has a structure of setting the difference in diameter as described above, and suppresses the growth of gingiva on the upper part of the upper structure for healing during the healing process, and prevents the secondary structure of the implant. Make surgery easy and reliable. Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited thereto.

[0011]

EXAMPLES Examples will be described with reference to FIGS. 1 to 3.
FIG. 1 is a schematic view (side view) of the intraosseous implant (1) and the healing superstructure (2). The intraosseous implant (1) is implanted in the jawbone. 2 is a schematic cross-sectional view of the endosseous implant (1) of FIG. The intraosseous implant (1) has a fitting projection (1) on the upper surface (1b) (diameter D1).
a) and has a post hole (1c) penetrating the protrusion (1a) and opened on the upper surface, and a female screw portion (1d) therein.

FIG. 3 is a schematic sectional view of the healing superstructure (2) shown in FIG. The healing upper structure (2) is the outer surface (2b) of the gingiva-penetrating tubular portion that contacts the gingiva after fastening
(Diameter D3 of the part that comes into contact with the gingiva and is exposed in the oral cavity),
The outer surface (2a) of the upper end exposed in the oral cavity (diameter D4),
The lower surface (2) in contact with the upper surface (1b) of the implant (1)
c), a hollow hole (2d) for accommodating the protruding portion (1a) of the implant (1), a cylindrical portion (2e), a male screw portion (2f),
End rod tip (2g), hole for inserting driver on top (2
f).

When the healing upper structure (2) is fastened to the intraosseous implant (1) having the above structure,
First, insert the rod tip (2g) of the healing superstructure (2) into the post hole (1c) of the intraosseous implant (1), and insert the screwdriver into the head hole (2h) of the healing superstructure (2). Insert and rotate to fasten healing superstructure (2) to implant (1).

As described above, for example, in the present invention, in order to prevent the growth of gingiva on the top surface of the healing superstructure (the top surface of the cylinder) during the gingiva healing period, the The diameter D4 of the outer surface (2a) of the upper end portion exposed in the oral cavity is made larger than the diameter D3 of the outer surface (2b) that contacts. In this case, it is effective that the above D4 is larger than D3 by 0.5 mm or more, further 1 mm or more. If it is made too large, for example, it will not contact the adjacent tooth and cannot be mounted, so it will not be made larger than necessary. Also,
The outer surfaces (2a) and (2b) are preferably polished in order to improve the affinity with the gingiva. Further, the diameter D1 of the upper surface (1b) of the implant (1) and the diameter D2 of the lower surface (2c) of the upper structure are substantially equal, and both surfaces are wholly or partially in contact (however, in the circumference, It is in contact with.) The shape of the outer surface (2b) of the gingiva-penetrating tubular portion that comes into contact with the gingiva is preferably the same as or similar to the shape of the upper structure (crown portion) to be mounted after healing of the gingiva. The shape of the outer surface (2a) of the upper end portion exposed to the outside of the oral cavity may be a pan shape, a dish shape, or the like, but is not limited to this. Further, the height of the outer surface (2b) of the gingiva-penetrating cylinder portion corresponds to the thickness of the gingiva, and therefore several types are prepared. At this time, the height at which the upper structure is exposed from the upper surface of the gingiva after mounting the healing upper structure must not hit the mating teeth that engage with it, and, for example, during meals,
The masticatory force is applied to the implant, and it may adversely affect the healing of the gingiva and the implant.

On the upper surface (1b) of the implant (1), there is a protrusion (for example, a cross section perpendicular to the implant long axis that is a circle, an ellipse, a polygon, etc.) that fits with the upper structure (crown), and has a taper. When the (1a) is provided, the healing superstructure is provided with a fool hole (2d) for accommodating the protrusion (1a). At this time, there is a processing problem in the screw part, and the gingival penetrating cylinder part (screw head) of the healing upper structure
It is necessary to provide a cylindrical part (2e) between the male screw and the male screw.

When the upper surface of the implant (1) is provided with a depression for fitting with the upper structure (crown), the gingiva-penetrating cylinder (screw head) and the male screw of the upper structure for healing are provided. By providing a protrusion that is housed in the recessed hole of the implant between the two, the operability at the time of fastening is improved and the strength is also increased. At this time, a cylindrical part may be provided between the screw part and the lower protrusion of the gingival-penetrating cylinder part (screw head) of the healing upper structure.

In addition, a rod tip (2
By providing g), the rod tip (2g) is inserted into the post hole (1c) of the implant (1), and the operability at the start of screwing becomes very good. The male screw part (2f) and the female screw part (1d) of the implant (1) have a 3
It is preferable that the screws are screwed together at a pitch or more, but if they are screwed more than necessary, the operability in the oral cavity becomes poor.

Ceramics such as alumina and zirconia can be used as the material for the healing upper structure, but titanium and titanium alloys are preferable in view of machinability and biocompatibility. In particular, titanium is most suitable in consideration of the affinity with gingiva.

[0019]

As described above, according to the present invention, there is provided a healing upper structure which has excellent operability and in which gingiva does not grow on the upper portion of the healing upper structure during the healing process. As a result, it can be expected that the success rate of the secondary surgery and the subsequent functional rate will be improved.

[Brief description of drawings]

FIG. 1 is a schematic side view of an intraosseous implant and a healing superstructure as an example.

2 is a schematic cross-sectional view of the endosseous implant 1 of FIG.

3 is a schematic cross-sectional view of the healing superstructure 2 of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Intraosseous implant (one example) 1a Fitting protrusion part 1b Implant upper surface 1c Post hole 1d Female screw part 2 Healing upper structure 2a Outer surface of the upper end exposed to the outside of the oral cavity 2b Outer surface of the gingival penetrating cylinder part in contact with the gingiva 2c The lower surface of the gingival penetrating cylinder that comes into contact with the gingiva 2d Fooling hole 2e Cylindrical portion 2f Male screw part 2g End rod tip 2h Hole D1 Diameter of the upper surface of the implant D2 Diameter of the lower surface of the gingival penetrating cylinder that comes into contact with the gingiva D3 Contact with the gingiva and expose in the oral cavity Diameter of the outer surface of the gingival penetrating cylinder D4 Outer surface of the upper end exposed in the oral cavity

Claims (6)

[Claims] 1. A healing upper structure for an intraosseous implant for a two-step method, which has a fitting portion into a post hole on the upper surface of the intraosseous implant and a gingiva-penetrating tubular portion, and contacts the gingiva, An upper structure for healing of an intraosseous implant, wherein a diameter of an upper end portion exposed in the oral cavity is larger than a diameter of a gingiva-penetrating tubular portion exposed in the above. 2. The healing upper structure according to claim 1, wherein the diameter of the upper end portion exposed in the oral cavity is 0.5 mm or more larger than that of the gingival penetrating cylinder portion that contacts the gingiva. 3. The healing upper structure according to claim 1, wherein the lower inner surface of the gingival penetrating cylinder portion serves as a storage portion for a projecting upper structure fitting portion on the upper surface of the implant. 4. The healing upper structure according to claim 1, wherein the lower outer surface of the gingival penetrating cylinder is accommodated in the recessed upper structure fitting portion of the upper surface of the implant. 5. The healing upper structure according to claim 1, wherein the post hole fitting portion is provided with a fixing screw portion and a rod tip at an end thereof. 6. The healing upper structure according to claim 1, which is made of titanium or a titanium alloy.