JPH04341257A - Bonding means for dental bridge prosthesis - Google Patents

Abstract

PURPOSE:To provide the bonding means for a dental bridge prosthesis which can stably hold a bridge without clattering the bond between the head of tooth root and the bridge and is easily removable at the time of repair, etc. CONSTITUTION:This bonding means 7 is provided with a hole 6 communication with the fitting and bonding part of the head of tooth root 2 or its metallic crown 3 and a bridge member 4 and is used to bond and fix this bridge member 4 to the head of tooth root 2 by inserting the member into the hole at the time of fitting and bonding the head of tooth root 2 and the bridge member 4. The bonding means internally has an internal sheet insert 71 consisting of Ti or Ti alloy or org. high-polymer material and is clad with an external cladding plate layer 72 consisting of the Ti or Ti alloy on both outer side faces thereof. The bridge and the head of tooth root are bonded by inserting the bonding means into the hole communication with the fitting and bonding part of the bridge and the head of tooth root in this way and, therefore, the strongly connected and bonded state is obtd. Since the bonding means has the sandwich structure consisting of the Ti or Ti alloy, etc., the means has adequate elasticity and flexibility and yields the stable bond retaining property against occlusal force. In addition, the means is easily removable at the time of repair of the dental bridge prosthesis.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling device used for fixing a bridge denture to the head of a tooth root.

0002

2. Description of the Related Art Conventionally, in order to compensate for missing teeth, a bridge is placed between a natural tooth root or an artificial tooth root, and a denture is fixed to this bridge. To adopt this bridge denture, if there are normal natural teeth remaining on both sides of one or more teeth that have been knocked out, the natural teeth are ground down and the bridge denture is fixed between the teeth, or If there are no adjacent natural teeth, an implant may be placed and a bridge attached to the head.

The conventional method for installing this bridge is to cut the heads of normal natural teeth into a predetermined shape such as a cone or pyramid, and then fit and connect a bridge member molded into the same shape with adhesive. However, simple adhesion has a weak bonding force, and over many years it has become loose, making it impossible to maintain a stable bond.

0004

[Problems to be Solved by the Invention] An object of the present invention is to provide a bridge denture joint that can stably maintain the connection between the tooth root head and the bridge without rattling, and that can be easily removed for repairs, etc. With the goal.

[0005]

[Means for Solving the Problem] The above object is to provide a hole that communicates with the tooth root head or its metal crown and the fitting joint portion of the bridge member when fitting and connecting a bridge denture to the head of a tooth root. , a coupling device that is inserted into the hole to couple and fix the bridge member to the tooth root head, and has an internal thin plate layer made of Ti or Ti alloy or an organic polymer material, and has Ti or Ti or This can be achieved by a bridge denture connector characterized in that it has an overlying outer cover layer made of a Ti alloy material.

[0006]

[Function] As described above, the present invention makes a hole communicating with the fitted connection part between the bridge and the tooth root head, and inserts a connecting tool into the hole to connect the bridge, so that a strong connected state can be achieved. . In addition, since the connector is made of a thin plate of Ti, Ti alloy, or organic polymer material covered with Ti material on both sides, it has appropriate elasticity and is stable while elastically absorbing occlusal force. It is possible to obtain high bond retention. Furthermore, it is easy to remove when repairing the bridge denture.

[0007]

[Example] The present invention will be explained below with reference to an embodiment of the drawings. Fig. 1 is a longitudinal cross-sectional view of a part of a bridge denture, and Fig. 2 is a cross-sectional view thereof. In the figure, 1 is a tooth root, and 2 is a tooth root. In the case of a natural tooth, the head is cut and formed using a dental tool, and is tapered toward the end to form a cone or pyramid shape. In the case of an implant, a predetermined tapered head is formed in advance and implanted into the jawbone, and the head that protrudes from the gums is utilized. Reference numeral 3 denotes a metal crown fixed to the cut and formed tooth root head 2 with an adhesive, and is usually made of a thin plate-shaped Ti material. Reference numerals 5 and 5 denote dentures, which are fixed in required numbers on the bridge member 4 made of a metal material such as Ti;
The crown parts at both ends of the bridge member 4 are fitted and fixed to metal crowns fixed to the root heads of the teeth. Note that if the head of the tooth root to be fixed is an artificial tooth root, the head is precisely smoothed, so the bridge member 4 can be directly fitted without providing a special metal crown 3. . Reference numeral 6 denotes a hole formed so as to communicate with the fitting connection portion of the metal crown 3 and the bridge member 4. In the illustrated embodiment, the hole 6 is formed so that the inner part thereof reaching the metal crown 3 widens into the shape of a pin head. It is shaped so that the connector described below will not easily fall off. Reference numeral 7 denotes a coupling device according to the present invention to be inserted into the hole 6, and its outer shape is formed to correspond to the inner surface shape of the hole 6. As the enlarged view of the coupling tool 7 is shown in FIG.
A thin plate layer 71 made of Ti or a Ti alloy or an organic polymer material is provided inside, and a thin plate layer 71 made of Ti or Ti alloy is provided on the outside of both sides.
It has a structure in which a cover plate layer 72 covered with an alloy material is provided and the cross section is formed into a bug pin shape.

Normally, simply fitting and fixing the bridge member 4 to the metal crown 3 bonded to the tooth root head 2 causes it to fall out or wobble, resulting in poor stability.
A bridge denture can be easily assembled by drilling a hole 6 that communicates with
It can be fixed in a good bonding state. Moreover, the connector has a sandwich structure of a thin plate layer 71 made of Ti or Ti alloy or an organic polymer material as its inner material and a cover layer 72 made of Ti or Ti alloy material covered on the outside. It has elasticity and flexibility. Therefore, the bridge 4 and the tooth root head (metal crown 3), which are connected by inserting the connecting device 7 having such elasticity into the communication hole 6, are elastically connected, and the elasticity against the occlusal force of about 70 Kgf is achieved. The deformation of about 0.02 to 0.04 mm can be stably received by the tapered head that widens toward the end, and a stable bonded state without loosening can be maintained.

[0009] The materials for the bridges, metal crowns, connectors, etc. should not only have static mechanical strength and dynamic strength such as fatigue resistance, but also have properties such as elastic modulus that harmonize with the surrounding bone tissue. In this respect, a Ti material is preferable, and moreover, a Ti material is less susceptible to elution and deterioration in the living body and has an affinity for human tissue. In addition, Ti alloys, such as Ni-Cr-Ti alloys, have excellent corrosion resistance, strength, and elasticity.
It is used in the same way as pure Ti, and the inside of the connector is made of Ti of the same metal, a Ti alloy material, or a material with good elasticity such as an organic polymer material, and the outside is made of Ti or a Ti alloy with excellent corrosion resistance and elasticity. Since it has a coated structure, it has excellent elasticity as well as compatibility, and can be expected to have secure retention and bond stability without loosening.

FIG. 4 shows another embodiment of the coupling device, in which a covering plate layer 7 made of Ti or Ti alloy material is provided on the outside of the inner thin plate layer 71.
Figure 5 shows a flat body with a protrusion that bulges out in the length direction at the center of the flat body. ), and insert and fix the hole into the same shape.

FIG. 6 shows another embodiment of the coupling device 7 according to the present invention and its attached state, in which the rod-shaped coupling device 7 is inserted into a hole made at the boundary between the metal crown 3 and the bridge member 4. 6. The rod-shaped connector 7 has an inner portion 71 made of Ti, a Ti alloy, or an organic polymer material, and a layer 72 made of a Ti or Ti alloy material covering the outer periphery thereof. Alternatively, as shown in FIG. 7, the rod-shaped connector 7 may have an inner portion made of Ti, a Ti alloy, or an organic polymer material, and the entire outer surface thereof covered with a layer 72 made of a Ti or Ti alloy material. It's okay.

[0012] The above explanation is based on the case where there are normal natural teeth next to the tooth to be repaired, but it is also possible to create a fixed bridge denture even when there are not enough natural teeth. An artificial tooth root is implanted on one side, and a bridge is connected and fixed to the head of the tooth root. An artificial tooth root is usually a single structure made of metal (Ti material, etc.), and consists of an implantation part, a head for support, and a connecting part, and is implanted and fixed by cutting a narrow groove in the alveolar bone. The head is a cone or pyramid with an upwardly exposed and elongated sloping surface that widens at the end.
By fitting and connecting a bridge to this, the denture can be held stably. In this case, by forming the insertion hole 6 for the coupling tool 7 in advance in the tooth root head,
There is no need for processing after implantation, and the bridge can be easily assembled and fixed.

In this way, by inserting the coupling tool 7, the bridge can be stably fixed semi-permanently, but if necessary, when repairing the denture, the fitting bridge can be easily fixed by pulling out the coupling plate 7 from the hole. Since it can be removed, it is convenient for repairs, etc. to be carried out easily.

[0014]

As described above, the present invention provides a method for fitting and connecting a bridge denture to the head of a natural tooth or an artificial tooth root. A strong connection can be achieved by inserting a coupling tool therein and fixing the connection. Moreover, the connector has a thin plate layer of Ti or Ti alloy material or organic polymer material inside, and Ti or Ti on both outer surfaces.
Since it is made of covered alloy material, it has appropriate elasticity, and while elastically absorbing occlusal force, it has no rattling and stable bond retention.

[0015] Furthermore, since the bridge is tightly fitted and in contact with the root head of the tooth or its metal crown without any gaps, it is possible to achieve excellent hygienic effects without the possibility of small pieces of food getting caught. In addition, when repairing a bridge denture, it is convenient that the fitted bridge can be easily removed by pulling the connector out of the hole.

The present invention is not limited to the embodiments described above, but includes all modified embodiments that can be easily deduced by a person skilled in the art from the above description within the scope of the purpose of the present invention. It is.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a bridge denture showing a state in which a connector according to the present invention is attached.

FIG. 2 is a cross-sectional view thereof.

FIG. 3 is an enlarged perspective view of an embodiment of the coupling device according to the present invention.

FIG. 4 is an enlarged perspective view of another embodiment.

FIG. 5 is an enlarged perspective view of another embodiment.

FIG. 6 is an explanatory diagram showing yet another embodiment of the coupling tool according to the present invention and its attached state.

FIG. 7 is an enlarged perspective view of yet another embodiment.

[Explanation of symbols]

１　　　　Tooth root 2 Root head of tooth 3 Metal crown 4 Bridge member 5. Dentures 6 Hole 7 Coupling tool 71　　　　　　　　Inner thin plate layer 72 External cover layer

Claims (2)

[Claims] [Claim 1] When the bridge denture is fitted and connected to the tooth root head (2), the tooth root head (2) or its metal crown (3) communicates with the fitting joint portion of the bridge member (4). A coupling device (7) is provided with a hole (6) and inserted into the hole to couple and fix the bridge member (4) to the tooth root head (2), the coupling device (7) having Ti or Ti alloy or an organic polymer material inside. A bridge denture joint device characterized in that it has an inner thin plate layer (71) consisting of a thin inner plate layer (71), and an outer covering plate layer (72) made of Ti or a Ti alloy material can be covered on both outer sides thereof. 2. The bridge denture coupling device according to claim 1, wherein a convex portion is formed on a part of the plate-shaped coupling device.