JPH0212967Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is used in dental treatment when filling a severely decayed tooth crown with a filling material such as resin or amalgam.
The present invention relates to a mounting device for planting a screw-shaped post that reinforces the retention of the filling material into a small hole formed in the crown of a tooth.

Methods of holding the post include carving a thread groove in the root canal and screwing the filling material into the post that fits into the groove, as in the Cuular Anchor System;
There is a method of holding the post by inserting the screw thread of the post into a root canal hole formed to match the thickness of the post using cement.

Another method is to form a root canal hole that is slightly larger than the outside diameter of the post, and then use cement or resin itself to fuse the post together. The present invention is a mounting device used when holding a post by this method.

To explain this method a little further, for example, before installing a post D having a biting groove C as shown in FIGS. 4 and 5 into a root canal, a small hole is first formed with a reamer. The outer diameter of this reamer is about 0.01 to 0.5 mm larger than the outer diameter of the post D. Before using such a reamer, it is preferable to first enlarge the root canal using a reamer with a smaller diameter than this reamer, and then use a finishing reamer with a larger diameter to adjust the shape of the small hole.

The post D used in this invention is not fixed to the tooth substance by screwing using threads, but is fixed via a luting material filled between the tooth substance and the post D, so the post D is easily attached. It is desirable to form a small hole with a diameter that allows it to be inserted into the root canal.

Next, when installing the post D, a luting material is injected into the small hole, the luting material is applied to the entire portion of the post that is installed in the small hole, and the post D is installed in the small hole. By using such a bonding material, the gap between the tooth substance and the post D in the root canal is filled with the bonding material, and the fixation between the tooth substance and the post D is strengthened. When the post D is attached, the post D is rotated, and by this rotation, the amount of luting material filling the gap between the root canal and the post D is adjusted.

As mentioned above, when a filling material is used as a material to repair the missing part of the abutment tooth during crown restoration,
Post D is installed in the root canal for the purpose of holding and reinforcing the restoration, but holding Post D in your fingers is not practical since the post itself is minute and the oral cavity is narrow. is impossible. Therefore, in the past, the gripping groove C of the post D was screwed into the gripping groove 5 provided at the tip of the mounting instrument as shown in FIGS. I am wearing it. If this mounting device drops the post D in the oral cavity before it is attached to the root canal foramen, there is a risk that the patient will swallow it. To prevent this, the above-mentioned gripping portion 5 is provided to prevent the patient from swallowing the post D. is granted.

However, the dimensions of the post D vary slightly due to tolerances, and some may stick too strongly to the mounting device. If the grip is too strong, it will not be easy to remove the attached instrument from the post D after the post D has been attached to the root canal foramen, and this will only require a lot of time and effort for the dentist. However, when the tooth is removed, excessive force is applied to the tooth root, resulting in safety problems such as tooth root fracture or periodontal tissues.

In view of the above-mentioned drawbacks, the present invention aims to provide a mounting device that has a good fastening function and can be easily removed from the post D. An embodiment of the present invention will be described below with reference to the drawings.

1 to 3, the mounting device according to the present invention consists of a mounting device main body A and a pin B,
This mounting device main body A is composed of a head portion 1 and leg portions 2. The outer periphery of the head 1 is knurled in order to improve operability, and the tip of the leg 2 is formed with a gripping portion 3 that matches the shape of the gripping groove C of the post D. Further, a through hole 4 is provided along the axis from the head 1 of the mounting device main body A to the tips of the legs 2. Pin B is connected to the through hole 4.
When the pin B is pushed into the through hole, the tip of the pin B protrudes about 1 mm from the gripping part 3 of the mounting device main body A.

The dental post mounting device of the present invention configured as described above allows the post D to be attached when the post D is mounted.
Attach the grip part 3 of the device body A to the grip groove C.
By inserting and engaging the post D, the post D is reliably held. Then, when you have finished installing the post D at the desired position, if you push the rear end of the pin B with your fingertip, the tip of the pin B will protrude from the gripping part 3 and the post D will be easily detached from the mounting device main body A. This has the effect of allowing safe and reliable post mounting work.

As mentioned above, one embodiment of the present invention has been described, but it goes without saying that various modifications can be made within the scope of the present invention, and the present invention is not limited to the above embodiment. For example, the gripping part 3 of the mounting device main body A is not limited to a positive shape in cross section, but may also have a negative shape, and depending on the shape of the post, it can be cylindrical, prismatic, polygonal, oval, etc. In other words, it is difficult to post. Any shape may be used as long as it has the function of attaching. Further, the grip portion may be configured to embrace and hold the post from the outside. In this case, the configuration of the gripping portion is similar to a box wrench, with a round hole, square hole, polygonal hole, or other deformed hole. Furthermore, the tip of the pin may be branched and the post may be pushed out at a plurality of locations, or a plurality of pins may be used.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of the mounting device main body according to the present invention, FIG. 2 is a right side view of FIG. 1, FIG. 3 is a front view of the pin according to the present invention, and FIG. 4 is a front view of the post.
5 is a left side view of FIG. 4, FIG. 6 is a front view of the conventional mounting device, and FIG. 7 is a right side view of FIG. 6. 1...head, 2...leg, 3...stick part,
4...Through hole, A...Main body of the mounting device according to the present invention, B...Pin according to the present invention.

Claims (1)

[Scope of utility model registration request] It has a head part 1 and a leg part 2, and a part 3 for attaching to a post is provided at the tip of the leg part 2.
It consists of a mounting device main body A, which has a through hole 4 extending along the axis from the base to the leg 2, and a pin B that is inserted into the through hole 4 and is slidable.
This dental post mounting device is characterized in that the tip of the pin B protrudes by a predetermined dimension from the gripping portion 3 of the mounting device main body A when the device is pushed toward the leg portion 2.