WO2022139549A1

WO2022139549A1 - Apparatus for injecting bone grafting material

Info

Publication number: WO2022139549A1
Application number: PCT/KR2021/019836
Authority: WO
Inventors: 유우상
Original assignee: 오스템임플란트 주식회사
Priority date: 2020-12-24
Filing date: 2021-12-24
Publication date: 2022-06-30
Also published as: KR102648311B1; KR20220092810A

Abstract

An embodiment of the present invention provides an apparatus for injecting a bone grafting material, the apparatus comprising: a casing including a hollow body, which is open at both ends and accommodates the bone grafting material therein, a hopper, which communicates the inside and outside of the body, and a cap, which closes the hopper; and a conveying unit provided inside the casing and including a shaft and a spiral screw disposed around the shaft. The bone grafting material is injected into the body via the hopper and then conveyed to one side of the casing according to the rotation of the conveying unit.

Description

Bone graft material injection device

The present invention relates to a bone graft material injection device, and more particularly, to a bone graft material injection device for implanting a bone graft material when there is insufficient bone mass in a site where an implant is to be placed during an implant procedure.

Implant treatment is a cutting-edge procedure that restores the original function of the tooth by planting an artificial tooth root made of titanium, which does not have a rejection reaction in the human body, to replace the root of a lost tooth, in the alveolar bone where the tooth has escaped, and then fix the implant.

In the implant procedure, if it is difficult to place an implant due to a lot of absorption of alveolar bone due to long-term neglect of a lost tooth, a bone graft material is implanted to restore the alveolar bone tissue, and then the implant is placed, and the bone graft material is quite expensive. Therefore, doctors who treat it must pay special attention.

As shown in FIG. 1 , conventionally, a bone graft material was implanted into the alveolar bone through a bone carrier and a bone condenser. The operator inserts the outlet part of the bone carrier, which is formed in a funnel shape, into the hole formed in the alveolar bone, inserts the bone graft material into the inlet located on the opposite side of the outlet, and then injects saline. The graft material was pushed into the alveolar bone little by little.

In general, it is known that about 0.7cc of bone graft material is required for 5mm bone grafting when implanting an implant. During insertion, the outlet was frequently blocked, causing inconvenience to the operator.

SUMMARY OF THE INVENTION The present invention is to solve the problems of the prior art, and an object of the present invention is to provide a bone graft material injection device capable of improving the clogging of the bone graft material and shortening the bone graft material filling time.

One aspect of the present invention is a casing comprising a hollow-shaped body having both ends open to accommodate a bone graft material therein, a hopper for communicating the inside and the outside of the body, and a cap for closing the hopper, and provided inside the casing and a transfer unit including a shaft and a spiral-shaped screw disposed around the shaft, wherein the bone graft material is injected into the body through the hopper and transferred to one side of the casing according to the rotation of the transfer unit , to provide a bone graft material injection device.

In one embodiment, the screw may be disposed to contact the body.

In one embodiment, the diameter of the body and the height of the thread of the screw may be formed to gradually decrease along the axial direction of the shaft.

In one embodiment, the cap may include a closing part protruding toward the body, and an end surface of the closing part may be formed to have a curved surface corresponding to an inner circumferential surface of the body.

In one embodiment, the pitch of the screw may be formed to gradually increase along the axial direction of the shaft.

In one embodiment, if the pitch of the screw is P1 and the pitch of the subsequent screw is P2, then R1 = P2 / P1 may be greater than 1.05 and less than or equal to 3 .

In one embodiment, the bone graft material transfer area formed between the shaft, the thread in the pitch of the screw and the inner circumferential surface of the body may be constant along the axial direction of the shaft.

In one embodiment, the bone graft material transfer area formed between the thread within the pitch of the screw and the inner circumferential surface of the body may be reduced at a certain rate along the axial direction of the shaft.

In one embodiment, if the transfer area is A1 and the subsequent transfer area is A2, R2 = A2 / A1 may be greater than 0.7 and less than 1.

In one embodiment, the transfer unit is connected to the motor of the handpiece can be rotated.

In one embodiment, the transfer unit closes the other side of the casing and includes a connection part having a groove formed around it, and the casing may include a ball that protrudes to the inner circumferential surface of the body and is elastically coupled to the groove. have.

One aspect of the present invention is provided in a casing including a hollow-shaped body having both ends open to accommodate a bone graft material therein, a hopper communicating the inside and the outside of the body, and the casing, the shaft and the shaft circumference A bone graft material injection device comprising a conveying unit including a spiral-shaped screw disposed on do.

According to one aspect of the present invention, the filling blockage is improved, and the bone graft material filling time is remarkably reduced, thereby shortening the operation time of the implant.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a view showing a conventional bone capacitor and a bone carrier.

2 is a perspective view of a bone graft material injection device according to an embodiment of the present invention.

3 is an exploded perspective view of FIG. 2 .

FIG. 4 is a cross-sectional view of FIG. 2 .

5 is a cross-sectional view of a casing and a transfer unit according to an embodiment of the present invention.

6 is a view schematically showing a bone graft material injection method using the bone graft material injection device according to an embodiment of the present invention.

7 is a perspective view of a bone graft material injection device according to another embodiment of the present invention.

8 is an exploded perspective view of FIG. 7 .

9 is a cross-sectional view of FIG. 7 .

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is "connected" with another part, this includes not only the case where it is "directly connected" but also the case where it is "indirectly connected" with another member interposed therebetween. . In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

As used herein, terms including an ordinal number such as 'first' or 'second' may be used to describe various components or steps, but the components or steps should not be limited by the ordinal number. . Terms containing an ordinal number should only be interpreted for the purpose of distinguishing one element or step from other elements or steps.

[First embodiment]

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

The bone graft material injection device 1000 according to an embodiment of the present invention is used to implant the bone graft material 1 into the alveolar bone 2 when the bone tissue at the site where the implant is placed is weak or the bone mass is insufficient. , largely composed of a casing 1100 and a transfer unit 1200 .

2 is a perspective view of a bone graft material injection device according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of FIG. 2 , and FIG. 4 is a cross-sectional view of FIG. 2 .

2 to 4 , the casing 1100 includes a body 1101 having a hollow shape with both ends open as a bone graft material 1 is accommodated therein, and at one end of the body 1101 . The formed outlet 1102 is inserted into the hole formed in the alveolar bone 2 by a drill for surgery. The outer diameter of the outlet 1102 may be formed of 4.1 mm, but is not limited thereto, and may be changed according to an applied target value.

The outlet 1102 may extend a predetermined distance so as to be parallel to the axial direction of the casing 1100 .

The other end of the casing 1100 is provided with an insertion hole 1103 larger than the diameter of the outlet 1102 . A plurality of through-holes 1104 passing through the radial direction are formed around the insertion hole 1103 , and the balls 1105 elastically supported in the radial direction are disposed in the through-holes 1104 . For example, a ball plunger (not shown) may be disposed in the through hole 1104 . In this case, the ball 1105 partially protrudes toward the inside of the casing 1100 and is seated in the connection groove 1232 of the transfer unit 1200 .

In addition, the diameter of the body 1101 is formed to gradually decrease as it approaches the outlet 1102 from the insertion hole 1103. Specifically, the outer peripheral surface of the body 1101 is formed to be tapered with a downward inclination of 4 to 10 degrees from the insertion port 1103 side toward the outlet 1102 as a conical shape.

In relation to this, Figure 5 (a) is a cross-sectional view of the casing 1100 according to an embodiment of the present invention. As shown in Figure 5 (a), the length of the extension of the outlet 1102 is L1, the length from the outlet 1102 to the insertion hole 1103 is L2, the inner diameter of the outlet 1102 is D1, the insertion hole 1103 When the inner diameter of D2 is, the inclination angle α of the outer peripheral surface of the body 1101 is

It can be determined by the formula

At this time, if α is less than 4 degrees, the axial length of the body 1101 is relatively long, so that the transport distance of the bone graft material 1 increases, so clogging may occur inside the body 1101, and α is 10 If it is larger than the figure, the insertion hole 1103 becomes large, so that the miniaturization of the bone graft material injection device 1000 cannot be achieved.

The casing 1100 is configured to include a hopper 1110 so that the bone graft material 1 can be easily filled therein.

In detail, the hopper 1110 is formed on one side of the outer peripheral surface of the body 1101 and is formed in a funnel shape with an open top. Since the inside and outside of the body 1101 are communicated by the hopper 1110, the operator can inject the bone graft material 1 into the casing 1100 through the hopper 1110.

At this time, it is preferable that the hopper 1110 is formed such that an angle formed by a pair of inner peripheral surfaces facing each other is 30 degrees or more and 50 degrees or less. In detail, when the angle formed by the pair of inner peripheral surfaces exceeds 50 degrees, the upper opening of the hopper 1110 is narrowly formed, which is cumbersome because the operator has to precisely adjust the input position of the bone graft material 1 . Conversely, when the angle between the pair of inner circumferential surfaces is less than 30 degrees, the upper opening of the hopper 1110 is formed wide, and the bone graft material 1 ejected by the rotation of the transfer unit 1200 is transferred to the hopper 1110 through the opening. ) can be dislodged to the outside.

On the other hand, the outer peripheral surface of the body 1101 may be provided with a handle portion 1120 that protrudes outwardly and is connected to a handle (not shown). The handle is formed in the shape of a rod extending long in the longitudinal direction, and a coupling portion having a shape corresponding to the handle portion 1120 is provided at one end. In this case, even if the operator does not directly grip the body 1101 , by coupling the handle to the body 1101 , the outlet 1102 of the body 1101 can be stably positioned in the hole of the alveolar bone 2 . The end of the handle unit 1120 may be formed in a spherical shape so that the handle unit 1120 is rotatable with respect to the handle, and in this case, the operator's convenience may be improved.

In addition, the casing 1100 may further include a cap 1130 configured to close the hopper 1110 . The cap 1130 is formed to have a size corresponding to the upper end of the hopper 1110, and on the lower surface of the cap 1130, a groove 1131 that can be engaged around the upper end of the hopper 1110 is located, and the central portion is closed protruding downward. A portion 1132 is formed. At this time, in order to prevent the screw 1220 and the closing part 1132 from interfering, the closing surface 1132a of the closing part 1132 end has a curved surface corresponding to the inner circumferential surface of the casing 1110 body 1101 . is formed In this case, since the inner peripheral surface and the closing surface 1132a of the body 1101 are continuously formed, it is possible to prevent the bone graft material 1 from being pushed out of the hopper 1110.

On the other hand, when the hopper 1110 is arranged to be adjacent to the outlet 1102, the end of the outlet 1102 side of the hopper 1110 abuts against the treatment site during surgery, which may cause discomfort to the patient. Therefore, as shown in Figure 5 (a), when the extended length of the outlet 1102 is L1, the end of the outlet 1102 side of the hopper 1110 is provided at a position of 1.5L1 or more in the outlet 1102 desirable.

2 to 4 , the transfer unit 1200 is provided inside the casing 1100, and through axial rotation, the bone graft material 1 accommodated in the casing 1100 is discharged through the outlet 1102. It is transferred to the side, and includes a shaft 1210 and a screw 1220 having a spiral shape.

The shaft 1210 is inserted into the insertion hole 1103 of the casing 1100 and positioned inside the body 1101 , and is formed in the shape of a rod extending in the axial direction.

A screw 1220 formed of a helical thread is disposed around the outer circumferential surface of the shaft 1210 . At this time, in order to prevent the bone graft material 1 from being transferred to the insertion hole 1103 side through the gap between the screw thread and the inner circumferential surface of the body 1101, the screw 1220 is formed to be in contact with the inner circumferential surface of the body 1101.

On the other hand, since the screw 1220 is integrally formed with the shaft 1210, when the shaft 1210 is engaged with the motor of the handpiece 10 and rotates, the bone graft material 1 inside the casing 1100 is the screw 1220. ) is transferred along the outlet 1102 side.

Preferably, the transfer unit 1200 may be rotated at a speed of 5 rpm or more and 60 rpm or less. When the transfer unit 1200 is rotated at a speed of less than 5 rpm, the difficulty of the operation may be reduced, but there is no significant difference in the time between the conventional bone carrier and the bone condenser. In addition, when the transfer unit 1200 is rotated at a speed exceeding 60 rpm, the bone graft material 1 is ejected at a high speed, and the bone graft material 1 is blocked at the outlet 1102 .

On the other hand, since the diameter of the body 1101 is tapered while gradually decreasing from the insertion port 1103 to the outlet 1102, the radius of the screw 1220 in contact with the inner circumferential surface of the body 1101 is also the radius of the body 1101. It is formed to gradually decrease according to the tapering. In addition, like the casing 1100 , the radius of the screw 1220 may be tapered with a downward inclination of about 5 to 10 degrees along the axial direction of the shaft 1210 .

On the other hand, the transfer amount of the bone graft material 1 according to the rotation of the screw 1220 is the shaft 1210, the transfer area defined by the area surrounded by the inner circumferential surface of the body 1101 and the thread positioned within the pitch of the screw 1220. is mainly affected by

Here, since the body 1101 is tapered while gradually decreasing in diameter as it approaches the outlet 1102 side from the insertion hole 1103 side, when the pitch of the screw 1220 is formed at equal intervals, the transfer area is the outlet ( 1102), it decreases. In this case, as the bone graft material 1 is compressed by the inner circumferential surface of the body 1101 or the screw thread of the screw 1220, the particles are crushed, so that the function may not be properly performed. In addition, depending on the compression of the bone graft material (1), a clogging phenomenon of the bone graft material (1) at the outlet (1102) may occur, and also the motor of the handpiece (10) may be overloaded.

Accordingly, the bone graft material injection device 1000 according to an embodiment of the present invention is formed to gradually increase as the pitch of the screw 1220 approaches the outlet 1102 from the insertion hole 1103 so that the transfer area is kept constant. can For example, the screw 1220 is formed so that the following pitches P2 and P3 are relatively larger than the pitch P1 of the insertion hole 1103 side.

In addition, the diameter of the shaft 1210 may be formed to gradually decrease as it approaches the outlet 1102 from the insertion hole 1103 so that the transfer area is kept constant along the axial direction of the shaft 1210 . However, the present invention is not limited thereto, and the shaft 1210 may be formed to have a diameter gradually decreasing along the axial direction.

As such, when the transfer area is kept constant along the axial direction of the shaft 1210, the bone graft material 1 is not excessively filled and compressed, and can be gently pushed out by the screw 1220. can be solved

In addition, the pitch of the screw 1220 may be formed to increase by a predetermined ratio as it approaches the outlet 1102 from the insertion hole 1103 .

In relation to this, Figure 5 (b) is a cross-sectional view of the transfer unit 1200 according to an embodiment of the present invention. 5(b), when the pitch of the insertion hole 1103 side is P1 and the subsequent pitch is P2, the ratio R1 of P2/P1 may be formed within the range of 1.05 or more and 3 or less. That is, based on the pitch P1, P2 = R1*P1, P3 = R1*P2 is formed. At this time, when R1 is formed to be less than 1.05, for example, since the reduction in the conveying area due to the decrease in the diameter of the body 1101 is greater than the increase in the conveying area according to the increase in the pitch, the clogging phenomenon at the outlet 1102 is The bone graft material (1) is excessively compressed and cannot be transferred smoothly. In addition, if R1 is, for example, more than 3, the pitch located on the anterior side becomes longer than necessary, so that the bone graft material 1 does not advance and stays in place and cannot be transferred smoothly.

In addition, in a range in which the bone graft material 1 is not compressed excessively, the pitch of the screw 1220 may be determined so that the transfer area decreases at a certain rate as it approaches the outlet 1102 . Specifically, as shown in FIG. 4 , when the conveying area by the pitch P1 is A1 and the conveying area by the subsequent pitch P2 is A2, the ratio R2 of A2/A1 may be 0.7 or more and less than 1. . That is, A2 = A1*R2, A3 = R2*A2 is formed based on the transfer area A1. If R2 is less than 0.7, the bone graft material 1 may be excessively compressed during the transfer process.

However, the present invention is not limited thereto, and the pitch of the screw 1220 may be formed to be constant along the axial direction of the shaft 1210 .

On the other hand, a connection portion 1230 coupled to the casing 1100 is formed at the end of the screw 1220 on the side of the insertion hole 1103 . The connection part 1230 is formed in a circular shape corresponding to the inner circumferential surface of the insertion hole 1103 to close the insertion hole 1103 and is configured to include a circumferential surface 1231 having a predetermined thickness. A connection groove 1232 corresponding to the shape of the ball 1105 protruding toward the inner circumferential side of the body 1101 is formed in the circumferential surface 1231 of the connection part 1230 . In addition, an inclined surface 1233 is formed in front of the circumferential surface 1231 to be inclined in a forward downward direction, and when the transfer unit 1200 is inserted, the ball 1105 is connected to the connecting groove 1232 along the inclined surface 1233. can be smoothly guided to.

In addition, the transfer unit 1200 includes an extension portion 1240 that extends toward the opposite side of the spiral screw 1220 along the axial direction of the shaft 1210 and is connected to the handpiece 10 .

6 is a view schematically showing a bone graft material injection method using the bone graft material injection device 1000 according to an embodiment of the present invention. Hereinafter, a method for injecting the bone graft material 1 using the bone graft material injection device 1000 according to an embodiment of the present invention will be described in detail with reference to FIG. 6 .

First, insert the outlet 1102 of the casing 1100 into the hole of the alveolar bone 2 taking care not to damage the maxillary sinus mucosa 4 in the maxillary sinus 3 . And when the casing 1100 is positioned in the hole, the bone graft material 1 is filled through the open upper end of the hopper 1110. In addition, saline solution is sprayed to the bone graft material 1 through the hopper 1110 for smooth transfer of the bone graft material 1, and a cap 1130 is mounted to close the upper portion of the hopper 1110.

Next, the handpiece 10 connected to the transfer unit 1200 is driven to rotate the transfer unit 1200 . As a result, the screw 1220 is rotated and the bone graft material 1 is transferred to the outlet 1102 side and injected into the maxillary sinus 3 . When the injection of the bone graft material (1) is completed, the casing (1100) is removed from the hole of the alveolar bone (2).

And when the ossification progresses after a certain period of time and the implanted bone graft material 1 is in a state in which an implant can be placed, the procedure is completed by placing and fixing the implant in the hole of the alveolar bone 2 . As described above, when the bone graft material injection device 1000 of the present invention is used, the bone graft material 1 injection process is performed in a short time, so that the treatment time can be shortened.

At this time, as described above, the bone graft material 1 and the saline solution are not limited to being introduced into the hopper 1110 in order, but after mixing the bone graft material 1 and the saline solution in a separate bowl, the hopper 1110 can also be put into

Hereinafter, an embodiment of the bone graft material injection device 1000 according to an embodiment of the present invention will be described in detail.

The parameters of the casing 1100 referenced in FIG. 5 were set to be D1 = 4.1mm, L2 = 28.5mm, α = 6 degrees, and the transfer area of the insertion hole 1103 side is A1, and the subsequent transfer area is A2 The pitch was set so that the ratio of A2/A1 was 0.9.

Then, 0.25cc of bone graft material was inserted into the hopper 1110, the extension 1240 was connected to the handpiece 10, and the handpiece 10 motor was set to 30rpm to measure the time required for filling. .

As a result of the measurement, it was confirmed that almost no clogging occurred during the filling process of the bone graft material (1), and it took about 10.1 seconds to fill the bone graft material (1) of 0.25 cc. That is, it is expected that it will take about 28 seconds to fill the 0.7cc bone graft material (1). On the other hand, in the case of the conventional filling method using the aforementioned conventional bone capacitor and bone carrier, it took about 3 minutes and 30 seconds to fill the 0.7cc bone graft material (1).

Therefore, according to the bone graft material injection device 1000 according to an embodiment of the present invention, the filling blockage is improved, and the filling time of the bone graft material 1 is effectively reduced, thereby shortening the implant operation time.

On the other hand, in the above-described embodiment, the operator directly puts the bone graft material 1 into the hopper 1110 to drive the handpiece 10 motor, but it is not limited thereto, and the bone graft material filling can be automatically controlled. have. For example, the container provided with the bone graft material 1 is coupled to the hopper 1110 so as to face the open upper side of the hopper 1110, and an opening and closing device that can be opened and closed may be provided at the entrance of the container. Preferably, when the opening and closing device is opened and the bone graft material 1 is put into the hopper 1110 from the container, the transfer unit 1200 can operate until the bone graft material 1 is not detected in the hopper 1110. In order to do so, an infrared sensor may be provided at the lower end of the inner circumferential surface of the hopper 1110 .

At this time, the opening/closing device, the infrared sensor and the handpiece 10 motor are controlled by the control unit provided in the bone graft material injection device (1000). In this case, when the bone graft material input signal is transmitted to the control device by the operator, the control device opens the opening and closing device, and the bone graft material 1 is filled in the hopper 1110 . Then, the control unit controls the motor of the handpiece 10 based on the detection signal of the bone graft material 1 inside the hopper 1110 by the infrared sensor. As such, when the bone graft material injection device 1000 is automatically controlled, the operator's convenience can be increased.

[Second embodiment]

7 is a perspective view of a bone graft material injection device according to another embodiment of the present invention, FIG. 8 is an exploded perspective view of FIG. 7 , and FIG. 9 is a cross-sectional view of FIG.

Hereinafter, a bone graft material injection device 2000 according to another embodiment (the second embodiment) of the present invention will be described with reference to FIGS. 7 to 9 . In the bone graft material injection device 2000 according to the second embodiment, the casing 2100 is coupled to the transfer unit 2200 through the casing cover 2140 , and is connected to the handpiece 10 separately from the extension portion 2240 . It is different from the first embodiment in that a part 2250 is included.

The casing 2100 may include a casing cover 2140 formed to partially cover the open space on the side of the insertion hole 2103 . The casing cover 2140 closes the insertion hole 2103 to prevent the bone graft material 1 accommodated in the body 2101 from departing through the insertion hole 2103 .

The casing cover 2140 is formed in a disk shape corresponding to the insertion hole 2103, and a through hole 2141 extending toward one side of the circumference is formed in the center of the casing cover 2140.

In addition, the insertion hole 2103 is formed with a circumferential groove 2103a that protrudes in the radial direction and extends along the circumference, and the casing cover 2140 has an insertion groove 2142 formed to surround the outer circumferential surface of the circumferential groove 2103a. can be formed. Here, the insertion groove 2142 extends to less than half the circumference of the casing cover 2140. When the insertion groove 2142 of the casing cover 2140 is aligned with the circumferential groove 2103a and fitted, the extension 2240 of the conveying unit 2200 is guided along the through groove 2141 to the center of the casing cover 2140. is supported on the

The transfer unit 2200 further includes an extension portion 2240 extending along the axial direction of the shaft 2210 and a handle portion 2250 coupled to the extension portion 2240 and connected to the handpiece 10 .

In detail, the extension part 2240 includes a first extension part 2241 formed to extend along the axial direction from the center of the shaft 2210 and the first extension part 2241 around the shaft 2210 . and a second extension 2242 extending to surround it. The first extension portion 2241 and the second extension portion 2242 are formed to be spaced apart from each other by a predetermined distance in the radial direction to form a predetermined space therebetween, and the shaft portion 2250 is fitted and coupled to the space.

The shaft 2250 has one end coupled to the extension 2240 and the other end coupled to the motor of the handpiece 10, and the shape of one end of the shaft 2250 is the first extension ( It is formed to correspond to the space between the 2241 and the second extension 2242 .

In detail, at one end of the bag 2250 , a central portion 2251 recessed inward so that the first extension 2241 is inserted into the center of the bag 2250 , and a first extension in the circumferential direction of the center portion 2250 . A first protrusion 2252 protruding to correspond to the space between the portion 2241 and the second extension portion 2242 is formed. When the operator fits the handle portion 2250 to the extension portion 2240, it can be firmly fixed. have.

Meanwhile, even when the shaft part 2250 is fitted and coupled to the extension part 2240 , slip may occur between the shaft part 2250 and the extension part 2240 by the rotation torque of the motor of the handpiece 10 . Therefore, in order to minimize the occurrence of slip between the shaft portion 2250 and the extension portion 2240 , the second projection 2253 formed to protrude more along the axial direction from the end of the first projection 2252 on the shaft portion 2250 . ) is formed, and between the first extension part 2241 and the second extension part 2242 , an anti-skid groove 2243 corresponding to the second protrusion part 2253 is formed to be depressed inwardly. At this time, the non-slip groove 2243 and the second protrusion 2253 are formed to partially open in the circumferential direction, and even if rotational torque is generated by the handpiece 10, the extension 2240 and the handle 2250 are formed. Slip between them is prevented. However, the present invention is not limited thereto, and the extension part 2240 and the handle part 2250 may be simply attached to each other.

The description of the present invention described above is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. There will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

[Explanation of code]

1000, 2000 bone graft material injection device

1100, 2100 casing

1200, 2200 transfer unit

Claims

A casing comprising a hollow-shaped body having both ends open to accommodate the bone graft material therein, a hopper communicating the inside and the outside of the body, and a cap closing the hopper; and

a transfer unit provided in the casing and including a shaft and a spiral-shaped screw disposed around the shaft; including,

The bone graft material is injected into the body through the hopper and transferred to one side of the casing according to the rotation of the conveying unit, a bone graft material injection device.
The method of claim 1,

The screw is a bone graft material injection device, characterized in that disposed in contact with the body.
3. The method of claim 2,

A bone graft material injection device, characterized in that the diameter of the body and the height of the screw thread of the screw are formed to gradually decrease along the axial direction of the shaft.
4. The method of claim 3,

the cap includes a closure projecting towards the body;

The end surface of the closure part, bone graft material injection device, characterized in that formed in a curved surface corresponding to the inner peripheral surface of the body.
4. The method of claim 3,

Bone graft material injection device, characterized in that the pitch of the screw is formed to gradually increase along the axial direction of the shaft.
6. The method of claim 5,

If the pitch of the screw is P1 and the pitch of the subsequent screw is P2, R1 = P2 / P1 is greater than 1.05 and 3 or less, the bone graft material injection device.
6. The method of claim 5,

The bone graft material transfer area formed between the shaft, the thread within the pitch of the screw and the inner circumferential surface of the body is constant along the axial direction of the shaft, the bone graft material injection device.
4. The method of claim 3,

The bone graft material transfer area formed between the screw thread in the pitch of the screw and the inner circumferential surface of the body is characterized in that it decreases at a certain rate along the axial direction of the shaft, the bone graft material injection device.
9. The method of claim 8,

Assuming that the transfer area is A1 and the subsequent transfer area is A2, R2 = A2 / A1 is greater than 0.7 and less than 1.
The method of claim 1,

The transfer unit is connected to the motor of the handpiece, characterized in that the rotation, the bone graft material injection device.
The method of claim 1,

The transfer unit includes a connecting portion that closes the other side of the casing and has a groove formed around it,

The casing protrudes to the inner circumferential surface of the body, the bone graft material injection device, characterized in that it comprises a ball elastically coupled to the groove.
A casing comprising a hollow body having both ends of which a bone graft material is accommodated therein and a hopper communicating the inside and the outside of the body; and

a transfer unit provided in the casing and including a shaft and a spiral-shaped screw disposed around the shaft; including,

The bone graft material is injected into the body through the hopper and transferred to one side of the casing according to the rotation of the conveying unit, a bone graft material injection device.