KR100929258B1 - Medical Tapping Mechanism - Google Patents

Abstract

The present invention relates to a medical tapping mechanism, and more particularly, in a medical tapping mechanism for inserting into a hole formed in a bone tissue to provide a female thread on an inner circumferential surface of the hole, a male thread is formed on an outer circumferential surface to rotate about a central axis. Tapping portion for forming a female thread on the inner peripheral surface while; A bag portion provided at an upper side of the tapping portion and coupled to a rotary tool for rotating the tapping portion; And a collecting part provided below the tapping part and collecting the bone fragments generated when the tapping part rotates to form a female thread on the inner circumferential surface of the hole.

Tapping mechanism, tapping part, collecting part, guide part

Description

Medical tapping apparatus

The present invention relates to a medical tapping mechanism, and more particularly, to a medical tapping mechanism provided with a collecting portion for extracting the bone is generated when inserted into the hole formed in the bone tissue to provide a female thread on the inner peripheral surface of the hole.

In general, implants are artificial tooth roots formed of screw-shaped titanium, which is a human-friendly material in bone tissue, that is, after planting fixtures into bone tissue by drilling, and when the bones around the implanted fixture are fused and hardened, the abutment is tightly attached to the fixture. It joins, and shape | bonds and joins the prosthesis which is an artificial tooth to the abutment.

Meanwhile, in order to easily insert the fixture into the bone tissue, a hole is drilled in advance into the bone tissue by using a drill, and an internal thread of a size corresponding to the thread formed on the outer peripheral surface of the fixture is formed by a tapping mechanism on the inner circumferential surface of the hole. In this way, when a hole having a female thread is formed in the inner circumferential surface, the fixture is inserted into the hole of the bone tissue.

1 illustrates a tapping mechanism according to the prior art, and FIGS. 2 and 3 illustrate a state in which the tapping mechanism according to FIG. 1 is inserted into a bone tissue of a human body. Such a medical tapping mechanism 100 according to the prior art is a tapping portion 110, a predetermined male thread 111 is formed on the outer circumferential surface, the bag is disposed on the upper side of the tapping portion 110 and coupled to the rotary tool It is made of a portion 120. The tapping part 110 is provided with a tapping groove 112 extending in the vertical direction, so that the bone cut when the tapping part 110 rotates is accumulated in the tapping groove 112 or the tapping groove 112. It is discharged to the outside along. The bag portion 120 is formed with a polygonal cross-section portion that can be combined with a rotary tool (not shown). Meanwhile, in order to form the female thread 134 in the hole 133, the tapping mechanism 100 is approached to the hole 133, and the rotating tool coupled to the polygonal cross-section of the bag 120 is rotated. The tapping part 110 cuts the inner circumferential surface of the hole 133 to form a female thread 134 on the inner circumferential surface thereof. In addition, the bone fragments generated while the female thread 134 is provided are stacked in the tapping groove 112 or discharged to the outside through the tapping groove 112. Meanwhile, when the tapping operation is completed, the tapping mechanism 100 is removed from the hole 133, and then the fixture 140 is inserted into the hole 133 to be implanted into the bone tissue.

The tapping mechanism 100 according to the prior art has the following problems.

In the case of a patient performing an implant, a lot of bone loss is required to collect a piece of bone that comes out during drilling or tapping, and to use a portion where bone is insufficient, but the tapping mechanism 100 according to FIG. 1 has a narrow tapping groove 112. There is only a limited amount to collect. On the other hand, in order to obtain more bone fragments may be considered how to increase the size of the tapping groove 112, but as the tapping groove 112 is larger the area occupied by the male thread 111 is reduced to reduce the overall tapping force It is undesirable to cause. On the other hand, the tapping groove 112, there is also a problem that once the bone pieces are not easily piled up and pushed out by the new incoming bone pieces.

In addition, the fixture 140, which is used recently, is manufactured by varying the size of the threads of the upper and lower ends as shown in FIG. This makes the lower portion of the fixture 140, which is placed on the relatively soft sponges 132, which form the lower side of the bone tissue 130, increases the initial fixation force by using a macro thread 142 with a relatively large thread size. The upper portion of the fixture 140, which forms the upper side of the bone tissue 130 and is placed in the rigid cortical bone 131, is to prevent the stress from being concentrated in the surrounding bone by using a micro thread 141 having a relatively small thread size. That is, the upper portion of the fixture 140 placed in the cortical bone 131 is smaller in size of the screw thread so that excessive stress is dispersed without being concentrated in a specific portion of the bone tissue 130 so that bone fracture does not occur.

The tapping mechanism 100 shown in FIG. 1 which is generally used is made to be suitable for a general fixture 140 composed of only macro threads 142. That is, the tapping mechanism 100 shown in FIG. 1 is provided with a macro thread 142 such that the distance between adjacent vertices of the male thread 111 is approximately 0.4 mm or more. However, if the thread is formed using the tapping mechanism 100 in which the macro thread 142 is formed in this way, there is a concern that excessive insertion torque may be generated when the fixture 140 is inserted. That is, there is no problem when the lower part of the macro screw thread 142 is inserted when the fixture 140 is inserted. However, when the upper part of the micro thread thread 141 is inserted, excessive insertion torque is rapidly generated. There is a problem. This is because a new female thread must be formed on the inner circumferential surface of the hole 133 as the micro thread 141 is inserted. In order to solve this problem, a drill is used to drill a large diameter of the entire hole 133 in advance to process the female thread using the tapping mechanism. A method of minimizing the thread 134 is used.

However, this method increases the interval between the fixture 140 and the surrounding bones, thereby lowering the initial fixation force when the fixture 140 is placed, as well as increasing the bone adhesion period.

In addition, the fixture 140 may be inserted in an unintended direction due to the large hole 133.

The present invention was created in order to solve the above-mentioned problems, and more particularly, the amount of bone pieces to be collected is increased, and even if various kinds of fixtures are inserted, there is no reduction in initial fixation force or increase in bone adhesion period. It is an object of the present invention to provide a medical tapping mechanism for forming a female thread in a hole in a bone tissue so that the fixture can be inserted in a desired direction.

Medical tapping mechanism according to the present invention for achieving the above-described technical object, in the medical tapping mechanism for inserting into a hole formed in the bone tissue to provide a female thread on the inner peripheral surface of the hole,

A male thread formed on an outer circumferential surface thereof so as to rotate about a central axis to form a female thread on the inner circumferential surface;

Bag portion provided on the upper side of the tapping portion; And

It is preferably provided below the tapping part, and includes a collecting part for collecting bone fragments generated when the tapping part rotates to form a female thread on the inner circumferential surface of the hole.

In the medical tapping mechanism, it is preferable that the collecting part is formed to collect bone along the circumferential direction.

In the medical tapping mechanism, it is preferable that the collecting portion is a collecting groove that is recessed toward the central axis.

In the medical tapping mechanism, it is preferable that a guide portion for axial insertion of the tapping portion is further provided while contacting the inner circumferential surface of the hole.

In the medical tapping mechanism, the guide portion preferably has an outer circumferential surface that maintains the same diameter in the vertical direction along the central axis.

In the medical tapping mechanism, it is preferable that the cross-sectional shape of the guide part cut into a plane centered on a central axis is a rectangle.

In the medical tapping mechanism,

The guide portion: the outer peripheral surface; An upper surface connected to an upper end of the outer circumferential surface; And it is made of a lower surface connected to the lower end of the outer circumferential surface, the distance between the upper surface and the lower surface is preferably reduced toward the central axis from the outer circumferential surface.

In the medical tapping mechanism, in the tapping portion, the distance between the vertices of the adjacent male threads is preferably 0.2 ~ 0.3mm.

In the medical tapping mechanism, the male lead is preferably 0.4 to 2.0 mm.

In the medical tapping mechanism, it is preferable that the laser marking part is formed at a predetermined height in the bag to recognize the tapping depth.

The medical tapping mechanism for achieving the above-described technical purpose is a medical tapping mechanism for inserting into a hole formed in bone tissue to provide a female thread on the inner circumferential surface of the hole, wherein a male thread is formed on the outer circumferential surface and rotates about a central axis. A tapping part for forming a female thread on the inner circumferential surface; Bag portion provided on the upper side of the tapping portion; And a collecting part for collecting bone fragments generated when the tapping part rotates.

The male thread of the tapping part includes a first male thread adjacent to the bag and a second male thread disposed below the first male thread.

Preferably, the distance between adjacent vertices in the first male thread is smaller than the distance between adjacent vertices in the second male thread.

In the medical tapping mechanism, the distance between adjacent vertices of the first male thread is preferably 0.2 to 0.3 mm.

Medical tapping mechanism according to the present invention, the collecting portion for collecting the bone is formed on the lower side of the tapping portion can collect a large amount of bone fragments, the distance between the vertices of the tapping portion is approximately 0.2 ~ 0.3 A micro male thread of mm is formed so that a fine female thread can be formed without widening the diameter of the hole, so there is no fear of decreasing the initial fixation force or increasing the bone adhesion period even when inserting the micro threaded fixture. There is an advantage that can be inserted in the intended direction.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 is a perspective view showing a medical tapping mechanism according to the present invention, Figures 6 to 7 is a view showing a state of inserting the medical tapping mechanism according to Figure 5 in the hole, Figure 8 is a female thread formed on the inner peripheral surface of Figure 7 The figure which shows a mode which inserts an implant fixture into a hole.

The medical tapping mechanism 10 according to the present embodiment includes a bag portion 20, a tapping portion 30, a collecting portion 40, and a guide portion 41.

The bag portion 20 is provided on the upper side of the tapping portion 30, and is coupled to a rotary tool (not shown), such as a handpiece or open range for rotating the tapping portion 30. The bag 20 is formed in the shape of a rod extending in the axial direction as a whole, the cross section of the polygonal shape is provided in the portion to which the open range or the handpiece is coupled. In addition, a stopper 21 is formed in the central portion of the bag 20 to prevent the tapping portion 30 from being excessively inserted. The outer diameter of the stopper 21 is formed larger than the inner diameter of the hole 53 to be inserted. The laser marking part 22 is formed in the lower bag part 20 of the stopper 21 so as to recognize the tapping depth. The operator who forms the female thread 54 in the hole 53 formed in the bone tissue 50 of the patient determines the proper insertion depth by looking at the laser marking part 22.

The tapping part 30 forms a lower end of the bag 20, and specifically, a male thread 31 is formed on an outer circumferential surface thereof so that the tapping part rotates around the central axis C. A female screw thread 54 is formed on the inner circumferential surface thereof. The tapping part 30 is formed with a tapping groove 32 extending in the vertical direction. Preferably, about 3 to 4 tapping grooves 32 are disposed at equal intervals along the circumferential direction. The male thread 31 of the tapping part 30 gradually increases in the outer diameter from the lower end to the upper side, and the outer diameter is kept constant at the center portion.

The distance between the vertices of the male threads 31 adjacent to each other in the tapping part 30 is preferably 0.2 to 0.3 mm. The distance between the vertices of the male threads 31 is suitable for use in the fixture 60 having both the micro thread 61 and the macro thread 62, which are recently developed, and specifically, the tapping part 30. The shape of the male threads 31 of) is preferably formed to correspond to the size of the micro thread 61 of the fixture (60).

Further, the lead of the male thread 31 of the tapping portion 30 is also preferably about 0.4 to 2.0 mm, similarly to the lead of the micro thread 61 and the macro thread 62. As such, the lead of the threads of the fixture 60 and the lead of the male thread 31 of the tapping part 30 are formed to correspond so that the fixture 60 may be inserted into the bone tissue 50 without a large force. .

The collecting part 40 is provided below the tapping part 30, and bone fragments generated when the tapping part 30 rotates to form the female thread 54 on the inner circumferential surface of the hole 53. 55) to harvest. The collecting part 40 is formed to collect the bone fragments 55 along the circumferential direction, specifically, it is preferable to form a collecting groove that is cut toward the central axis (C). That is, the collecting groove is to be dug toward the central axis (C) in the circumferential direction. The collecting groove is connected to the lower end of the tapping part 30 so that the bone fragments 55 generated while the tapping part 30 rotates are introduced and accumulated in the collecting groove.

The guide portion 41 guides the axial insertion of the tapping portion 30 when it is in contact with the inner circumferential surface of the hole 53 (44), specifically, the lowest end when the tapping mechanism 10 is inserted. When the guide portion 41 of the contact with the inner peripheral surface of the hole 53 (44) serves to properly maintain the insertion direction. It is preferable that such a guide part 41 has a substantially rectangular cross section cut in the plane centered on the central axis C thereof. The guide portion 41 is composed of an outer circumferential surface 42, an upper surface 43, and a lower surface 44, and has a cylindrical shape having an outer diameter that substantially corresponds to the inner diameter of the hole 53 as a whole.

Specifically, the outer circumferential surface 42 is one surface of the guide portion 41 facing the inner circumferential surface of the hole 53 when the tapping mechanism 10 is inserted into the hole 53, along the central axis C. The diameter of the outer circumferential surface is kept constant as going up and down. The upper surface 43 is a surface connected to the upper end of the outer circumferential surface 42, and the lower surface 44 is a surface connected to the lower end of the outer circumferential surface 42. The upper surface 43 and the lower surface 44 are arranged in parallel with each other.

The medical tapping mechanism 10 according to the present embodiment having such a configuration operates as follows.

First, after the hole 53 is drilled into the bone tissue 50 using a drill in advance, the tapping mechanism 10 is inserted into the hole 53. At this time, the bag portion 20 and the rotary tool (not shown) of the tapping mechanism 10 are coupled to each other, so that the bag portion 20 rotates about the central axis C as the rotary tool operates. Therefore, the tapping part 30 also rotates at the same time. In addition, the male thread 31 formed in the tapping part 30 cuts the inner circumferential surface of the hole 53 to form the female thread 54, and the bone fragments 55 generated at that time are the tapping groove 32 and the collecting part. Stacked at 40 at the same time. On the other hand, the guide portion 41 formed at the lower end of the tapping mechanism 10 is positioned at the lowermost end and is in contact with the inner circumferential surface while being inserted into the hole 53 so that the tapping mechanism 10 is defined along the hole 53. Allow the path to travel. On the other hand, the male thread 31 formed in the tapping portion 30 has a size corresponding to the size of the micro thread 61 of the fixture 60, the hole 53 formed by the tapping portion 30 The internal thread 54 also has a size corresponding to the micro thread 61 of the fixture 60.

On the other hand, the operator looks at the laser marking unit 22 to determine whether the tapping mechanism 10 is sufficiently inserted, and if it is determined that the insertion to the desired depth, the insertion stops and the hole tapping mechanism 10 ( 53).

Thus, after forming the female thread 54 in the hole 53, as shown in FIG. 9, the implant fixture 60 is inserted in the hole 53. As shown in FIG. The implant fixture 60 is inserted into the hole 53 while being rotated in a state coupled with a predetermined rotation mechanism, wherein the female thread 54 formed on the inner circumferential surface of the hole 53 is shown in FIG. 10. Since it is made of a size suitable for both the macro thread 62 and the micro thread 61 of the fixture 60, the force is not applied to the inner circumferential surface of the hole 53, i.e., the peripheral bone, while the fixture 60 is inserted. Do not.

The medical tapping mechanism according to this embodiment has the following effects.

First, the tapping mechanism according to the prior art is that the bone fragments generated by the insertion is accumulated only in the tapping groove, the amount is not only small, it is easy to take the existing bone fragments are pushed out and collected due to the newly entering bone fragments. Did not do it. On the contrary, the tapping mechanism according to the present embodiment has an advantage that bone fragments generated while tapping are accumulated as they are in the collecting section at the bottom, so that the desired amount of bone fragments can be collected from the collecting unit after the tapping is completed.

In addition, the tapping mechanism according to the prior art has a male thread that fits the size of the macro thread, so that the micro thread part of the fixture is placed, which causes an excessive force on the surrounding bone. In order to solve this problem, a method of puncturing the inner diameter of the hole largely was attempted to prevent excessive force, but according to this method, the distance between the bone tissue and the fixture thread is far and the initial fixation force decreases and the adhesion time increases. There was a problem.

On the contrary, in the medical tapping mechanism according to the present embodiment, since the female thread of the size suitable for the micro thread and the macro thread is formed in the hole, the fixture can be implanted in the bone tissue without difficulty in expanding the size of the hole. Accordingly, there is an advantage that does not occur a problem that the initial fixing force is reduced or the bone adhesion period is increased.

In addition, the tapping mechanism according to the prior art has a tapered shape at the end, and there is a fear that the insertion direction is unintentionally changed while being inserted into the hole. On the contrary, in the present embodiment, a cylindrical guide portion is formed at the lowermost end, and the outer circumferential surface of the guide portion moves in contact with the inner circumferential surface of the hole, so that the overall insertion direction is not intentionally changed.

In addition, in the prior art, it is not easy for the operator to implant the bone tissue of the patient to a suitable depth, but in the present embodiment, since the operator has formed a laser marking portion that can sufficiently recognize the current depth, cancer is provided to the intended depth. There is an advantage to forming a thread.

The medical tapping mechanism according to the present invention described above may be changed as follows.

In the above-described embodiment, the upper surface of the guide portion is parallel to the lower surface of the guide portion, but as shown in FIG. 10, the upper surface of the guide portion 41 may have a concave shape. That is, the distance between the upper surface 43 and the lower surface 44 of the guide part 41 toward the central axis C from the outer circumferential surface 42 may be reduced. In this case, compared with the tapping mechanism mentioned in the above-described embodiment, the size of the collecting portion is increased, so that a larger amount of bone fragments can be collected. On the other hand, the shape of the guide portion is not limited to this, and in order to obtain a larger amount, the upper surface can be approached with the lower surface almost, and the distance between the upper surface and the lower surface can be also far from each other. In addition, it is possible to be changed in various ways according to the operating environment of the operator.

In addition, in the above-described embodiment, the tapping part has the same pitch in the vertical direction (the distance between the vertices of adjacent threads), but in addition, as shown in FIG. 11, the upper and lower male threads have different pitches. It is possible. That is, the male thread 31 of the tapping part 30 includes a first male thread 31a adjacent to the bag and a second male thread 31b disposed below the first male thread 31a. Preferably, the distance (pitch) between adjacent vertices in the first male thread 31a is smaller than the distance (pitch) between adjacent vertices in the second male thread 31b. Specifically, the tapping part has a male thread having a shape corresponding to the fixture shown in FIG. 4, so that the fixture can be easily inserted into the bone tissue after tapping. Meanwhile, the distance (pitch) between adjacent vertices of the first male thread may be 0.2 to 0.3 mm so as to correspond to the micro threaded portion of the fixture. On the other hand, in addition to the male thread may be changed to have a variety of pitch.

In addition, in the above-described embodiment, although the collecting portion is shown in the form circumferentially along the circumferential direction, in addition to the collecting portion may be formed only in any part of the circumferential direction, and other bone fragments formed by the upper tapping portion from the lower side Of course, if it can be collected form any form is possible.

In addition, in the above-described embodiment, an example in which the micro screw thread is formed in the tapping part is illustrated, but of course, a male thread corresponding to the macro screw thread may be formed. That is, it is a matter of course that the size of the thread formed on the tapping portion can be changed according to the shape of the fixture to be treated.

In addition, in the above-described embodiment, although the polygonal cross-section portion is formed in the bag, which can be combined with the rotary tool, the polygonal cross-section portion is removed so that it can be rotated by hand without using a tool. In addition, it is also possible to form other parts without the upper part of the stopper. In other words, even if various forms are used, it is a matter of course that belongs to the scope of the present invention.

Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not necessarily limited to these embodiments and modifications, and various modifications can be made without departing from the spirit of the present invention.

1 shows a tapping mechanism according to the prior art

2 and 3 are views for operating the tapping mechanism according to FIG.

4 is a view showing a state in which the fixture is inserted after forming the female thread in the hole by the tapping mechanism according to FIG.

5 is a view showing a medical tapping mechanism according to a preferred embodiment of the present invention.

6 and 7 operate the tapping mechanism according to FIG. 5;

8 and 9 are views showing a state in which the fixture is inserted after the female thread is formed in the hole by the tapping mechanism according to FIG. 5.

10 is a view showing a medical tapping mechanism according to another embodiment of the present invention

11 is a view showing a medical tapping mechanism according to another embodiment of the present invention

<Detailed Description of Drawings>

10 ... tapping mechanism 20 ... sack

21.Stopper 22.Laser marking part

30 ... Tapping part 31 ... Male thread

32 tapping groove 40

41.Guide section 42 ... Outer circumference

43 ... top 44

50 ... bone tissue 51 ... cortical bone

52 ... spongy bone 53 ... hole

54 ... female thread 55 ... bone fragments

60 ... fixture 61 ... micro thread

62 ... Macro thread C ... Center axis

Claims (12)

In the medical tapping mechanism for inserting into the hole formed in the bone tissue to provide a female thread on the inner peripheral surface of the hole, A male thread formed on an outer circumferential surface thereof so as to rotate about a central axis to form a female thread on the inner circumferential surface; Bag portion provided on the upper side of the tapping portion; And A medical tapping mechanism is provided below the tapping part and includes a collecting part for collecting bone fragments generated when the tapping part rotates to form a female thread on the inner circumferential surface of the hole. The method of claim 1, The collecting part is a medical tapping mechanism, characterized in that it is formed to collect bone fragments along the circumferential direction. The method of claim 2, The collecting part is a medical tapping mechanism, characterized in that the collecting grooves are formed toward the central axis. The method of claim 1, And a guide portion for contacting the inner circumferential surface of the hole to guide the axial insertion of the tapping portion. The method of claim 4, wherein The guide part has a medical tapping mechanism, characterized in that it has an outer circumferential surface that maintains the same diameter in the vertical direction along the central axis. The method of claim 5, Medical guide tapping mechanism, characterized in that the cross-sectional shape of the guide portion, cut in a plane centered on the center axis. The method of claim 5, The guide portion: The outer circumferential surface; An upper surface connected to an upper end of the outer circumferential surface; And a lower surface connected to the lower end of the outer circumferential surface, Medical tapping mechanism, characterized in that the distance between the upper surface and the lower surface is reduced toward the central axis from the outer peripheral surface. The method of claim 1, In the tapping portion, the medical tapping mechanism, characterized in that the distance between the vertices of the adjacent male threads is 0.2 ~ 0.3mm. The method of claim 1, The male threaded lead is a medical tapping mechanism, characterized in that 0.4 ~ 2.0 mm. The method of claim 1, Medical bag tapping mechanism characterized in that the laser marking portion is formed at a predetermined height to recognize the tapping depth. In the medical tapping mechanism for inserting into the hole formed in the bone tissue to provide a female thread on the inner peripheral surface of the hole, A male thread formed on an outer circumferential surface thereof so as to rotate about a central axis to form a female thread on the inner circumferential surface; Bag portion provided on the upper side of the tapping portion; And Including a collecting unit for collecting the bone fragments generated when the tapping unit rotates, The male thread of the tapping part includes a first male thread adjacent to the bag and a second male thread disposed below the first male thread. And wherein the distance between adjacent vertices in the first male thread is less than the distance between adjacent vertices in the second male thread. The method of claim 11, And a distance between adjacent vertices of the first male thread is 0.2 to 0.3 mm.

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