JPH0282964A - Artificial dental root - Google Patents

Abstract

PURPOSE:To eliminate such an unpleasant feeling that a shock and vibration act on a bone to transmit to the brain by relaxing the shock due to the occlusion of teeth by using a porous net constituted of a metal or the like and covering a part of the surface of an implant or the entire surface excepting a neck part thereof with said net. CONSTITUTION:The porous net 4 applied to the head part 3 of an implant is formed a reticulated state by molding or weaving a metal powder, a ceramics powder, chips, a wire, a nonwoven fabric or a composite material thereof with resins into a porous structure. This reticulated net 4 has elasticity and compressibility and, when an artificial tooth is fixed and held to the head part 3 of the implant, the porous net 4 is interposed between this fixed denture and the head part 3 of the implant to perform cushioning action to the shock at the time of the occlusion of teeth. Usually, pressure of about 35-70kg acts as occlusion pressure but the porous net 4 is compressed by about 0.001-0.05 mm at this time to make it possible to absorb a shock to relax the propagation of the shock and vibration.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an artificial tooth root implanted in bone that serves as an abutment for an artificial tooth.
related to improvements in implants.

(Prior Art) As shown in Fig. 1, a conventional implant includes a flat implant part 1 implanted into the alveolar bone, a neck part 2 that stands up from the implant part, and a neck part 2 that is inserted into the oral cavity following the neck part 2. It is a single structure made of metal and has high rigidity, consisting of an exposed head 3 that serves as an abutment for the denture.

A large number of holes 1a having a diameter of about 1 to 3 mm are formed in the flat plate, through which bones are regenerated and fixed to improve retention.

〔problem〕

In an implant, a flat implant part 1 of a rigid structure as shown in Fig. 1 is surgically implanted into the bone.
The crown is bonded to the tooth to support it, and it is held stably without loosening or moving. However, when fixed dentures are occlusally applied, a pressure of about 35 to 70 is applied directly, and the impact, vibration, etc. The mandibular canal, which is made up of nerves and blood vessels, runs from the implanted part 1 to the bone under the #ji cisternal bone, but it has the drawback that vibrations and the like propagate through it and are transmitted to the back of the brain, causing discomfort.

[Means for solving problems]

The present invention was proposed in order to improve the above-mentioned conventional drawbacks, and it is a porous net made of metal or ceramic powder, chips, wire, nonwoven fabric, or a composite material with these resins. ), and is characterized in that it is used to cover the entire surface of the artificial tooth root except for the negative part surface or the neck part 2.

[Effect]

Since the porous net-like material has some elasticity and is compressible, it can be inserted between the artificial tooth root head 3 and the denture supported, or between the implanted part and the alveolar bone, so that it can be used during occlusion. It has the effect of absorbing shocks and vibrations and can prevent them from propagating to the brain.

It is also possible to improve the retention between the parent and the tooth root.

〔Example〕

The present invention will be explained below with reference to one embodiment of the drawings.

FIG. 2 shows an example of a structure in which the head 3 of the implant is covered with a porous net 4. The porous net 4 is made of metal, ceramic powder, chips, wire, nonwoven fabric, or a composite material of these resins, and is porously molded or woven into a net shape. This mesh net is elastic and compressible, and allows the artificial tooth to be firmly held in the head 3 of the implant, but a porous net 4 is interposed between the fixed denture and the implant head 3 to prevent the tooth from forming. The cushion acts against the impact during occlusion. Normally, the occlusal pressure is about 35 to 10 to 9, but at this time, the porous net 4 is about 0.001 to 0.05 m
It is possible to absorb shock by compressing it by about 1.5 m and to reduce the propagation of shock and vibration. The metal material forming the net 4 is Ti, which is a corrosion-resistant implant material.

Using Li gold alloy, apatite or ceramics containing apatite, or ceramics alone,
Used are those made into a fabric, those formed into a porous form by melt bonding, and those formed into a porous form by mixing with a resin. Also, a material using a permanent magnet or a mixture thereof may be used. For powder and wire, for example, 5 to 50
It can be used as a uniform body of woven fabrics, non-woven fabrics, or mixed porous materials, or as a sparse or dense bilayer or multilayer structure with varying inner and outer densities, or by using a ceramic body for the outer layer to make it strong. It can be used in any combination, such as by forming the inner side with a soft metal. The maximum compressed size is about 0.05 to 0.1 mm. The porous net 4 and the implant may be used as they are simply placed over each other, but their retention can be improved by welding them together. If a laser beam is used for the welding process, the welding process can be easily and cleanly performed, and the welding process can be carried out arbitrarily by dispersing the welding parts and welding the desired parts.

FIG. 3 shows an embodiment in which the entire implant is covered with a porous net 4 from the head 3 to the implantation part 1. In this case, the head 3 exposed in the oral cavity of the implant is used.
and a neck portion 2 that connects the implant portion 1 to be embedded in the alveolar bone.
Do not weld to the The neck 2 is a part where mucosal tissue bulges to protect the implant 1 implanted in the alveolar bone and prevent the invasion of bacteria, etc., and in order to improve the fleshiness, the net 4 should not be attached. do.

Figure 4 shows another embodiment, in which (a) is a side cross-sectional view and (b) is a front view, in which two flat plates are arranged almost parallel to each other from the base to the distal end where the implanted part 1 of the implant is bridged. They have opposing shapes, and are constructed in a shape that connects the head 3 to the base. The implant structure itself can be formed into a stress dispersion structure by forming a recess 1b in the flat plate under the part where the head 3 is joined as shown in the front view of FIG. As shown in the figure, a porous net 4 is bonded to the implanted portion 1 and the head 3 to improve the cushioning effect. According to this imbrandt 2
By inserting and implanting two flat plates into a groove processed and formed parallel to the alveolar crest, the flat plate is more firmly fixed and supported within the bone than a single flat plate, increasing lateral stability and retention. It can be fixed with increased strength and provide stable support for the teeth.

FIG. 5 is a perspective view of Haku's embodiment, in which the bridge connecting portion of the two flat plates of the implantation part 1 is formed in a U-shape with RlC attached, and the base of the bridge connecting the two flat plates is formed. This is an example in which the window 1d is formed by removing the cut except for the part that connects the head 3. In this case as well, the stress is dispersed throughout the implanted part 1 against the pressure applied to the head 3 and acts as a buffer. , and the combination of the porous net 4 can enhance the buffering effect. The implanted implant undergoes rapid bone regeneration through the hole 1a formed in the flat plate and through the window 1d formed at the base of the upper end, improving retention and stabilizing the denture fixed to the head 3. can be supported.

The shape of the head 3 that is exposed in the oral cavity and serves as the abutment for the denture is formed in any shape such as a cylinder, an elliptical cylinder, a prism, a cone, or a pyramid, and this head 3 is connected to the implant part 1. The neck 2 is usually formed into a constricted shape so that the meat can easily rise.
The shape may be straight from the head 3 and connected to the implant 1.

The number of heads erected on the implanted portion can be a double head with two or three heads. Depending on the number of heads, the dimensions (mainly the front width) of the implanted portion that holds them are made larger to increase the holding force.

The shape and structure of the implanted portion 1 are not limited to those of the illustrated embodiment, but can be made into various shapes, shapes and structures that disperse stress.

〔Effect of the invention〕

As described above, the present invention uses a porous net made of metal or ceramic powder, chips, wires, nonwoven fabric, or a composite material of these and resins as an implant to support a denture. Since this is placed over a part of the surface of the implant or the entire surface of the implant except for the neck, a porous net is interposed between the head of the implant and the denture, and between the implanted part and the bone, providing a cushioning effect. However, the impact caused by teeth occlusion can be alleviated, and the drawbacks of the conventional technology in which impact and vibration act on bones, nerves, and are transmitted to the brain, causing discomfort, can be eliminated.

In addition, since vibrations can be prevented by the cushioning effect of the porous net, bone regeneration is rapid, the bond between the bone and the tooth root is high, and the tooth can be used from an earlier period after surgery. .

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional artificial tooth root, Fig. 2 is a front view of one embodiment of the artificial tooth root of the present invention, Fig. 3 is a front view of another embodiment, and Fig. 4 is a front view of another embodiment. The figure is a side sectional view, FIG. 5 is a front view, and FIG. 5 is a perspective view of another embodiment. 1...... Implanted part 2... Neck 3... Head 4...・・・・・・Porous Net 111 Criminal Patent Application Person Ohnic Co., Ltd. Representative Keisuke Namba, t2 El, t3 J father-in-law/a

Claims (1)

[Claims] In artificial tooth roots that connect the head exposed in the oral cavity to the bone implant via the neck, porous materials made of metal or ceramic powder, chips, wires, nonwoven fabrics, or composite materials of these and resins are used. An artificial tooth root characterized by covering a part or the entire surface of the artificial tooth root with a net (net-like material).