JPH0443216Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention involves drilling holes in plaster for planting dental dowel pins, and creating anti-rotation grooves to prevent tooth molds from rotating. This invention relates to a dowel pin planting tool for attaching a handpiece used for carving.

(Prior art) Conventionally, holes for planting dowel pins of this type were made by injecting primary gypsum into the impression and drilling holes for dowel pins after it hardened. In some cases, the hole is drilled at an angle because the hole is drilled manually and by intuition.
Sometimes it's too deep and you can't penetrate it. Therefore,
The drilling operation had to be carried out extremely carefully, and considerable skill was required to be able to drill the hole straight to a predetermined depth. Also,
When carving anti-rotation grooves on the back of the primary plaster to prevent the tooth mold from rotating and shifting its position relative to the dental model, care should be taken to avoid damaging the plaster and significantly impairing the accuracy of the model. must be taken into account. As mentioned above, the conventional drilling of planting holes is carried out with careful consideration of various points.
It had a very inefficient flaw.

Furthermore, there are drilling machines for planting dowel pins, but these machines have problems such as being very large, requiring space, and being very expensive, making them difficult to use generally.

(Problems to be solved by the invention) This invention was made to solve the drawbacks of the conventional methods as mentioned above. There were problems in that the planting hole of the dowel pin and the anti-rotation groove of the tooth pattern were often inclined or cut too deeply.

Therefore, the purpose of this invention is to make it possible to easily and reliably cut dowel pin planting holes vertically to a predetermined depth using a drilling tool, and to increase work efficiency by not damaging the plaster during work. .

However, nothing that meets these demands has been found at present, and the emergence of one has been awaited.

This invention is proposed in order to meet the above-mentioned demand.

(Means for Solving the Problems) In order to solve all of the above-mentioned problems, this invention has an insertion cylinder 2 into which the hand piece 15 is inserted into the drilling instrument 1, and a restoration cylinder 3 in which the guide rod 8 is housed. are integrally constructed adjacent to each other. This insertion cylinder 2 is provided with a fastener 5 at its upper part and a stop side wall 6 at its lower part. The restoring cylinder 3 houses a restoring spring 9 into which the guide rod 8 therein is inserted and which presses the insertion cylinder 2. Next, a flat support 10 is attached to the lower end of the guide rod 8. A through hole 11 into which a drill 16 at the lower end of the hand piece 15 enters and exits, and a stop hole 12 into which the stop side wall 6 is fitted are bored in the flat base 10. Therefore, according to this invention, since the flat abutment base 10 can slide parallel to the tooth model, the effect of accurately drilling the vertical planting hole and the horizontal anti-rotation groove can be fully demonstrated. It is.

(Function) This device has the above-mentioned configuration, and to explain how to use this device now, when planting the dowel pin 20, the handpiece is attached to the insertion cylinder 2 of the drilling tool 1 shown in FIG. Insert 15. Next, the fifth
As shown in the figure, the hand piece 15 is tightened in advance so that the length position of the drill 16 at the lower end is at a position that defines a predetermined depth of the planting hole 12 of the tooth row model 17 when descending. Fix it using the attachment 5. Then, the flat support 10 attached to the lower end of the guide rod 8 is applied to the flat surface of the tooth row model 17 as shown in FIG. Next, as shown in FIG.
Once the predetermined position has been determined, when the handpiece 15 of the drilling instrument 1 is pressed while rotating, the guide rod 8 compresses the restoring spring 9 and contracts, so that the drilling instrument 1 and the handpiece 15 are compressed. is descending;
The drill 16 of the hand piece 15 is the tooth row model 17.
The planting hole 18 is drilled to a predetermined depth. That is,
The stopping side wall 6 at the lower end of the insertion cylinder 2 and the lower end of the restoring cylinder 3 serve as a stopper, preventing it from advancing beyond a predetermined depth. In addition, tooth row model 1
When carving anti-rotation grooves 19, 19 on the flat surface of 7, by moving horizontally while pressing the flat plate 10, the groove can be freely carved to a certain depth with the drill 16.

(Embodiment) Next, an embodiment of this invention will be described with reference to the drawings. A drilling instrument 1 for planting a dowel pin 20 that fits into a hand piece 15 from the outside includes an insertion cylinder 2 into which the hand piece 15 is inserted; This insertion cylinder 2
Adjacent to this, a restoration machine cylinder 3 is integrally formed of light metal. A tightener 5 such as a screw for tightening the handpiece 15 is screwed onto the upper side surface of the insertion cylinder 2. Also, on one side of the bottom,
A stop side wall 6 is formed on the flat stop 10 and fits into a stop hole 12. The lower end of this stop side wall 6 is
A stop narrow piece 7 is formed with a step. Next, a guide rod 8 is inserted into the inside of the restoration machine cylinder 3. A restoring spring 9 such as a spring is installed on the upper part of the guide rod 8. Further, the guide rod 8 has a guide groove 4 formed on its outer periphery for guiding up and down. Further, the flat abutment base 10 is attached to the lower end of the guide rod 8 with a set screw 13. This flat table 1
0 is made of transparent or translucent synthetic resin and is formed into a substantially rectangular shape, and has a through hole 11 arranged in parallel with the stop hole 12 into which a part of the lower end of the hand piece 15 is inserted. It is mandatory. Reference numeral 16 indicates a drill to be inserted into the handpiece 15, and 17
1 shows a dental model made of plaster of a split restoration type, and reference numeral 18 indicates a planting hole 18 drilled at a predetermined position in the dental model 17. 19,19 is
This is a rotation prevention groove that prevents the tooth row model 17 cut in the vicinity of the planting hole 18 from rotating. Reference numeral 21 indicates model teeth formed on the tooth row model 17.

(Effects of the invention) As described above, according to this invention, any number of people can easily attach the dowel pin to a commonly used handpiece and drill the dowel pin vertically and accurately to a predetermined depth. It has an excellent effect of being able to accurately and efficiently carve anti-rotation grooves horizontally to a constant depth, and even when the drilling device is attached to the handpiece, the entire body is lightweight, making it easy to operate, and it can be easily operated when unnecessary. It has the effect of being easily removed and stored without taking up much space. Depending on the insertion cylinder of the drilling instrument, handpieces of various sizes can be freely supported by the tightener depending on the diameter, and the stop side wall provided at the bottom of the drilling instrument has the following effects:
This serves to accurately stop the handpiece. Furthermore, the restoring spring and guide rod housed inside the restoring cylinder adjacent to the insertion cylinder have the effect of raising and lowering the insertion cylinder accurately, and the lower end of the restoring cylinder can be moved up and down by the guide rod. This has the effect of accurately stopping the flat abutment by hitting the upper surface of the flat abutment mounted at the lower end, and also allowing the lower surface of the flat abutment to move horizontally with respect to the dental model.

Furthermore, this invention has the advantage that the depth of the dowel pin planting hole can be adjusted by determining the tightening position by moving the hand piece in height, making the operation very simple. By attaching this drilling tool to the handpiece, there is no need to worry about damaging the plaster surface while drilling the planting holes and anti-rotation grooves. effective.

[Brief explanation of drawings]

Figure 1 is an oblique view of the drilling device of this invention, Figure 2 is a side view, Figure 3 is a longitudinal side view with a part cut out, Figure 4 is a bottom view, and Figure 5 is how it is used before drilling. FIG. 6 is a side view showing the state during drilling, and FIG. 7 is a side view showing the state where the dowel pin is installed in the tooth row model. Reference numeral 1 is a drilling device, 2 is an insertion cylinder, 3 is a restoring machine cylinder, 5 is a tightener, 6 is a stopping side wall, 7 is a stopping narrow piece, 8 is a guide rod, 9 is a restoring spring, and 10 is a flat stopper. 11 is a through hole, 12 is a stop hole, 15 is a hand piece, 17 is a tooth row model, 18 is a planting hole, 19 is a rotation prevention groove, and 20 is a dowel pin.

Claims (1)

[Scope of utility model registration request] The drilling instrument 1 is a dowel pin planting drilling instrument consisting of an insertion cylinder 2 into which a hand piece 15 is inserted and a restoration elevator cylinder 3 which houses a guide rod 8. A restoration elevator cylinder 3 is integrally formed, and the insertion cylinder 2 is provided with a fastener 5 at the upper part and a stop side wall 6 at the lower part,
A guide rod 8 is inserted into the restoring elevator cylinder 3, and a restoring spring 9 for pressing the insertion cylinder 2 is housed therein.The lower end of the guide rod 8 has a flat abutting base 10 on which a hand piece is attached. A through hole 11 in which the drill 16 at the lower end of the hole 15 enters and retracts, and a stop hole 12 into which the stop side wall 6 fits.
A dowel pin planting device for attaching a handpiece, characterized in that a dowel pin is drilled in each case.