WO2014014142A1

WO2014014142A1 - Hitting device for forming hole by hitting alveolar bone at predetermined force

Info

Publication number: WO2014014142A1
Application number: PCT/KR2012/005742
Authority: WO
Inventors: Young-Wan Song
Original assignee: Ssi, Inc.
Priority date: 2012-07-18
Filing date: 2012-07-18
Publication date: 2014-01-23

Abstract

Disclosed herein is a hitting device for forming a hole by hitting an alveolar bone at a predetermined force, the hitting device including: a hollow shaped housing having an internal space formed therein; a driving rod inserted into the internal space in a state in which a front end portion thereof is exposed outside the internal space; a receiving body coupled to the driving rod so as to be movable in a direction intersecting with an extension direction of the housing and having a receiving space opened at an upper portion thereof and including a bottom surface formed at a lower portion thereof; a hitting body disposed at the internal space and elastically supported by the housing, such if the hitting body becomes to be aligned with the opened upper portion of the receiving space, the hitting body hits the bottom surface, thereby transferring an impact to the front end portion; and an inducing body installed at the internal space and inducing the receiving body to be changed from a state in which the receiving space is not aligned with the hitting device to a state in which the receiving space is aligned with the hitting device by the movement of the receiving body when the front end portion is moved in a direction toward the internal space.

Description

HITTING DEVICE FOR FORMING HOLE BY HITTING ALVEOLAR BONE AT PREDETERMINED FORCE

The present invention relates to a hitting device for forming a hole that may arrive at a maxillary sinus by hitting an alveolar bone under the maxillary sinus at a predetermined force in a process of implanting an implant by maxillary sinus lift surgery.

Generally, as a method of performing a maxillary sinus lift surgery for implanting an implant in a maxillary sinus (an upper jaw), there are a method of lifting a maxillary sinus by drilling a side of the maxillary sinus and a method of approaching a maxillary sinus by performing the drilling from a distal end of an alveolar bone under the maxillary sinus toward the maxillary sinus.

In the method of drilling the side of the maxillary sinus, an operator drills a side of an alveolar bone and performs an operation while directly viewing the alveolar bone with eyes. Therefore, the method of drilling the side of the maxillary sinus has an advantage in that the operator may confirm whether the side of the alveolar bone has been drilled; however, it has disadvantages in that technology itself is difficult and an operation is limited. Further, in the case of this method, an affected part is excessively large, which causes great inconvenience to a patient.

In the case of the method of performing an operation at the distal end of the alveolar bone, an incision is small, inconvenience of a patient is low, and an operation is relatively simple. Therefore, the method of performing an operation at the distal end of the alveolar bone has been mainly used. However, a technology is sensitive, various anatomic structures are present, and an operator may not directly view a surgical portion with eyes, such that a success rate of the operation is low. The reason why the success rate of the operation is low is that the case in which the drill penetrates through the alveolar bone and then tears the maxillary sinus frequently occurs since whether or not the drilling of the alveolar bone is completed at the time of performing the drilling from the distal end of the alveolar bone toward the maxillary sinus may not be confirmed (felt).

An object of the present invention is to provide a hitting device capable of forming a hole in an alveolar bone without damaging a maxillary sinus by hitting a remaining portion of the alveolar bone after drilling the alveolar bone in maxillary sinus lift surgery at a predetermined force.

According to an exemplary embodiment of the present invention, there is provided a hitting device for forming a hole by hitting an alveolar bone at a predetermined force, the hitting device including: a hollow shaped housing having an internal space formed therein; a driving rod inserted into the internal space in a state in which a front end portion thereof is exposed outside the internal space; a receiving body coupled to the driving rod so as to be movable in a direction intersecting with an extension direction of the housing and having a receiving space opened at an upper portion thereof and including a bottom surface formed at a lower portion thereof; a hitting body disposed at the internal space and elastically supported by the housing, such that if the hitting body becomes to be aligned with the opened upper portion of the receiving space, the hitting body hits the bottom surface, thereby transferring an impact to the front end portion; and an inducing body installed at the internal space and inducing the receiving body to be changed from a state in which the receiving space is not aligned with the hitting device to a state in which the receiving space is aligned with the hitting device by the movement of the receiving body when the front end portion is moved in a direction toward the internal space.

The front end portion may be formed to be offset with respect to an extension axis of a remaining portion of the driving rod.

The hitting device may further include a mounting rod detachably coupled to the front end portion.

The front end portion may include a first screw thread formed at a free end thereof, the mounting rod may be provided with a recess receiving the free end therein, and an inner surface of the recess may be provided with a second screw thread coupled to the first screw thread.

The hitting device may further include a stopper formed so that the mounting rod is fitted thereinto to thereby be detachably mounted on a protrusion part and formed to have a length at which it exposes a free end side of the mounting rod, wherein the mounting rod is further provided with the protrusion part protruding on an outer surface thereof.

The stopper may include: a cylindrical body; and a slot extended from one end portion of the body toward the other end thereof.

The driving rod may further include a key protruding on an outer surface thereof, and the housing may further include a rail formed in an inner surface thereof to slidably receive the key therein.

The housing may be provided with a penetrated and opened identification window, and the driving rod may further include an indicating part visually confirmed through the identification window by the movement of the driving rod.

The hitting device may further include: a base coupled to the driving rod and receiving the receiving body therein; and a biasing member connecting the base and the receiving body to each other to bias the receiving body toward one side of the driving rod to allow the receiving body to be positioned in a state in which the receiving body is not aligned with respect to the driving rod, wherein the bottom surface of the receiving body is provided with a through-hole into which the driving rod is inserted.

The hitting body may have a hollow portion into which the driving rod is movably inserted.

The inducing body may protrude in a ring shape from an inner surface of the housing and a surface of the inducing body facing the receiving body may be formed as an alignment surface so that a width of the ring becomes gradually wide.

The hitting device may further include a driving button having a driving surface contacting a driving protrusion to allow the driving rod to move toward the internal space and installed at the housing so as to be operable at an outer portion of the housing, wherein the driving rod further includes the driving protrusion positioned at the internal space and protruding on an outer surface thereof.

With the hitting device for forming a hole by hitting an alveolar bone at a predetermined force according to the exemplary embodiment of the present invention configured as described above, a remaining portion of the alveolar bone after drilling the alveolar bone in maxillary sinus lift surgery is hit at a predetermined force, thereby making it possible to form a hole in the alveolar bone without damaging the maxillary sinus.

In addition, since the hitting mechanism is implemented by pressing the front end portion of the driving rod pressed against the alveolar bone, an operator may operate the hitting device even with his/her one hand, such that an operation is not troublesome.

The above and other objects, features and advantages of the present invention will become apparent from the following description of preferred embodiments given in conjunction with the accompanying drawings, in which:

FIG. 1 is a cross-sectional view showing a hitting device 100 according to an exemplary embodiment of the present invention;

FIG. 2 is a perspective view showing a modified example of a front end portion 121 of a driving rod 120 of FIG. 1;

FIG. 3 is a perspective view showing a modified example of the driving rod 120 and a front end housing 113 of FIG. 1;

FIG. 4 is a perspective view showing a modified example of the driving rod 120 and a rear end housing 115 of FIG. 1; and

FIG. 5 is a cross-sectional view showing a hitting device 200 according to another exemplary embodiment of the present invention.

Hereinafter, a hitting device for forming a hole by hitting an alveolar bone at a predetermined force according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present specification, throughout the exemplary embodiments of the present invention, similar components will be denoted by the same or similar reference numerals and a description thereof will be replaced by a first description.

FIG. 1 is a cross-sectional view showing a hitting device 100 according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the hitting device 100 may be configured to include a housing 110, a driving rod 120, a receiving body 130, a hitting body 140, an inducing body 150, and a stopper 160.

The housing 110 is a hollow body extended in a length direction. An internal space S of the housing 110 is extended in the length direction. The housing 110 may include a main housing 111, a front end housing 113, and a rear end housing 115. The main housing 111 is positioned at the center and the front end housing 113 and the rear end housing 115 are coupled to both sides of the main housing 111, respectively. The internal space S is formed to be in communication from the front end housing 113 to the rear end housing 115 through the main housing 111.

The driving rod 120 is generally a rod inserted into the internal space S of the housing 110. The driving rod 120 may include a front end portion 121, a rear end portion 123, and a central portion 125. Here, the front end portion 121 may be positioned outside the internal space S, and the rear end portion 123 may also be positioned outside the internal space S. However, the central portion 125 occupying most of the driving rod 120 is positioned in the internal space S. Here, when it is assumed that the central portion 125 and the rear end portion 123 form a first straight line C, the front end portion 121 may form a second straight line A spaced apart from the first straight line C by a predetermined gap O. To this end, the front end portion 121 may be extended from the central portion 125 with being bent two times. Here, the first straight line C and the second straight line A may be approximately in parallel with each other.

The receiving body 130 is a member movably coupled to the driving rod 120. The receiving body 130 which has a receiving space 131 includes a bottom surface 132 formed at a lower portion thereof and an opened portion 133 formed at an upper portion thereof. A through-hole 134 may be formed at the bottom surface 132 of the receiving body 130 and the driving rod 120 may be inserted into the through-hole 134. Here, the through-hole 134 has an inner diameter sufficiently larger than an outer diameter of the driving rod 120, such that the center of the receiving body 130 may be in a state in which it is biased toward one side with respect to the center C of the driving rod 120. In order to move a position of the receiving body 130, the receiving body 130 may be received in a base 135. The base 135, which is coupled to the driving rod 120, has the receiving body 130 moved therein and is fixed with respect to the driving rod 120. In order for the receiving body 130 to be elastically biased toward one side of the driving rod 120, a biasing member 137 may be provided. The biasing member 137, which is, for example, a spring, is installed to connect an inner surface of the base 135 and an outer surface of the receiving body 130 to each other. The receiving body 130 may move in one state in which it is concentric to the driving rod 120 by overcoming elastic force of the biasing member 137 while being maintained in another state in which it is biased toward one side of the driving rod 120 by the biasing member 137. As described above, the receiving body 130 may move in a direction intersecting with the length direction of the driving rod 120, for example, a horizontal direction in FIG. 1.

The hitting body 140 is a member disposed at the internal space S and hitting the bottom surface 132 of the receiving body 130 under a predetermined condition. In the present embodiment, the hitting body 140 is a hollow body receiving the driving rod 120 therein. The hitting body 140 may relatively move with respect to the driving rod 120 in an extension direction of the driving rod 120. The hitting body 140 may include a hitting part 141 disposed at a front end thereof and a supporting part 143 disposed at a rear end thereof. The hitting part 141 is a part hitting the bottom surface 132 of the receiving body 130, and the supporting part 143 is a part supporting one end of a pressing body 145. The pressing body 145, which is, for example, a coil spring, has the other end supported by the rear end housing 115 to elastically press the hitting body 140 in a direction toward the receiving body 130.

The inducing body 150 is a component installed at the internal space S and inducing the movement of the receiving body 130 so that the receiving body 130 is changed from one state in which it is not aligned with the hitting body 140 to another state in which it is aligned with the hitting body 140. Here, the receiving body 130 moves in the direction intersecting with the extension direction C of the driving rod 120, as described above. In the present embodiment, the inducing body 150 has a configuration in which it protrudes in a ring shape from an inner surface of the main housing 111. The center of the ring is provided with a penetration part 151 into which the driving rod 120 is inserted. A surface of the inducing body 150 facing the receiving part 130 may be formed as an alignment surface 153 so that a width of the ring becomes gradually wide.

The stopper 160 is a component coupled to the front end portion 121 and exposing a free end side of the front end portion 121 by a predetermined length. In order to couple the stopper 160 and the front end portion 121 to each other, the front end portion 121 may include a protrusion part 122 formed at one position thereof. An upper end 162 of the stopper 160 is caught by the protrusion part 122 to maintain a state in which the stopper 160 is coupled to the front end portion 121.

According to this configuration, an operator may hold the housing 110 with one hand and then insert the front end portion 121 of the driving rod 120 into a hole (a recess in a state before completely penetrating through an alveolar bone) of a drilled alveolar bone. When the housing 110 is pushed toward a maxillary sinus, the free end of the front end portion 121 is blocked by the alveolar bone to thereby be pressed. Therefore, the driving rod 120 moves in a direction M so that the base 135 and the receiving body 130 rise toward the inducing part 150. The receiving body 130 is applied with force in an oblique line direction with respect to the driving rod 120 by the alignment surface 153 while rising toward the inducing body 150. Therefore, the receiving body 130 moves from one state in which it is eccentric to the driving rod 120 to another state in which it is concentric to the driving rod 120. As a result, the receiving body 130 also becomes a state in which it is concentric to the penetration part 151. Further, in this state, the receiving space 131 of the receiving body 130 becomes a state in which it is aligned with the hitting part 141 of the hitting body 140, such that the hitting part 141 is inserted into the receiving space 131 of the receiving body 130 by elastic force of the pressing body 145 to hit the bottom surface 132. Force by the hitting is transferred to a remaining portion of the alveolar bone through the receiving body 130 and the front end portion 121 of the driving rod 120. When the remaining portion of the alveolar bone is deleted by the force, a completely opened hole connected to the maxillary sinus is formed in the alveolar bone.

In this process, an elastic modulus of the pressing body 145 is predetermined, such that the hitting body 140 always hits the receiving body 130 at a predetermined level of force. Therefore, impact applied to the alveolar bone by the front end portion 121 is also constant, such that even though an operator is replaced, such that the remaining portion of the alveolar bone may be stably removed (without tearing the maxillary sinus).

The front end portion 121 of the driving rod 120 is offset with respect to the central portion 125 thereof, thereby making it possible to improve convenience of the operator according to mouth structures of persons.

In addition, the stopper is additionally used to limit a depth at which the free end side of the front end portion 121 may be inserted into the hole of the alveolar bone, thereby making it possible to remove a risk that the front end portion 121 will penetrate through the alveolar bone and then tear the maxillary sinus. To this end, when an outer diameter of the front end portion is smaller than or equal to an inner diameter of the hole drilled in the alveolar bone, an outer diameter of the stopper 160 may be larger than the hole.

Another configuration of the front end portion 121 as described above will be described with reference to FIG. 2.

FIG. 2 is a perspective view showing a front end portion 121' according to a modified example of a front end portion 121 of a driving rod 120 of FIG. 1.

Referring to FIG. 2, the front end portion 121' of a driving rod 120' may be configured to have a length shorter than that of the front end portion 121 according to the above-mentioned exemplary embodiment and include a mounting rod 170 additionally mounted thereat.

In order to mount the mounting rod 170, a free end portion of the front end portion 121' may be provided with a first screw thread 121a. In addition, one end portion of the mounting rod 170 may be provided with a recess 171 receiving the free end of the front end portion 121' therein and an inner peripheral surface of the recess 171 may be provided with a second screw thread 173 corresponding to the first screw thread 121a. An O-ring 175 is interposed between the front end portion 121' and the recess 171, thereby making it possible to block moisture from penetrating into the recess 171.

In the case in which the mounting rod 170 is mounted at the front end portion 121', the stopper 160 may be coupled to the mounting rod 170 rather than the front end portion 121'. To this end, an outer surface of the mounting rod 170 may be provided with a protrusion part 178.

Specifically, the stopper 160 may include a cylindrical body 161, a convex part formed at an upper end 162 of the body 161, and a slot 163 extended from the upper end 162 of the body 161 toward a lower end thereof. When the mounting rod 170 is fitted into the stopper 160, the slot 163 allows the upper end 162 of the stopper 160 to be widened to overstride the protrusion part 177. The convex part formed at the upper end 162 of the stopper 160 is caught over the protrusion part 178 not to allow the stopper 160 to be separated from the mounting rod 170.

According to this configuration, a plurality of mounting rods 170 having different sizes (mainly in diameters) may be alternately mounted in one hitting device 100, as needed. Therefore, even in the case in which diameters (determined by diameters of drills) of the holes formed in the alveolar bone are different, all of the holes having different diameters may be processed by the plurality of mounting rods (a remaining component of the hitting device 100 is one).

Next, a component for confirming a forward movement of the front end portion 121 of FIG. 1 will be described with reference to FIG. 3.

FIG. 3 is a perspective view showing a modified example of the driving rod 120 and a front end housing 113 of FIG. 1.

Referring to FIG. 3, a front end housing 113' is different from the front end housing 113 shown in FIG. 1 in that it further includes an identification window 114. The identification window 114 is a window penetrated and opened so as to allow an internal space of the front end housing 113' to be in communication with the outside.

A driving rod 120 may be provided with an indicating part 125 corresponding to the identification window 114. The indicating part 125 is positioned at a position corresponding to that of the identification window 114 when the driving rod 120 moves upwardly and then returns to its original position. The indicating part 125 may be a part painted by a paint having a color distinguished from those of other portions of the driving rod 120 or be a separately formed shape (a circle, a star, or the like).

According to this configuration, it may be appreciated that after the driving rod 120 moves upwardly (M) and the hitting body 140 (See FIG. 1) hits the receiving body 130 (See FIG. 1), the driving rod 120 returns to its original position. The meaning that the driving rod 120 returns to its original position in a process of removing a remaining portion of the alveolar bone is that the remaining portion of the alveolar bone has been removed. The reason is that when the alveolar bone is not removed (furthermore, when the hitting device 100 is maintained at a stop position as it is), the driving rod 120 moves upwardly (M) and is then blocked by the alveolar bone, such that it may not return to its original position.

Next, a new concept for a relationship between the rear end housing 115 and the driving rod 120 will be described with reference to FIG. 4.

FIG. 4 is a perspective view showing a modified example of the driving rod 120 and a rear end housing 115 of FIG. 1.

Referring to FIG. 4, an inner wall defining an internal space S of a rear end housing 115' is provided with a rail part 117. The rail part 117 is formed to be recessed in the inner wall of the rear end housing 115'. A single rail part 117 or each of a plurality of rail parts 117 is arranged in the extension direction of the driving rod 120 (See FIG. 1).

A rear end portion 123' of the driving rod 120 is provided with a key 124 corresponding to the rail part 117. The key 124 has a size and a shape in which it is slidably inserted in the rail part 117.

According to this configuration, at the time of the upward movement and the downward movement of the driving rod 120, the key 124 moves only along the rail part 117. As a result, the driving rod 120 moves only in a vertical direction and does not rotate around an extension axis C (See FIG. 1) thereof. When the driving rod 120 does not rotate, a position relationship set between the front end portion 121 and the hole of the alveolar bone that is offset to the front end portion 121 is not changed. Therefore, there is an advantage in that the operator needs not to rotate the housing 110 (See FIG. 1) around the front end portion 121 (See FIG. 1) in order to maintain the above-mentioned position relationship.

An additional means for moving the driving rod 120 upwardly will be described with reference to FIG. 5.

Referring to FIG. 5, the hitting device 200 has substantially the same configuration as that of the hitting device 100 according to the above-mentioned exemplary embodiment of the present invention except that it further includes a driving button 280.

The driving button 280 is disposed to be inserted into an internal space S through a housing 210, more specifically, a button hole 212 of a front end housing 213. An outer portion of the driving button 280 may be provided with a head part appropriate to be operated by the operator and an internal space side portion of the driving button 280 may be provided with a driving surface 281 formed to be inclined.

A driving rod 220 is provided with a driving protrusion 225 corresponding to the driving surface 281. The driving protrusion 225 may be positioned to contact the driving surface 281.

In order for the driving button 280 to be biased toward an outer side of the front end housing 213, an elastic body 285 may be disposed outside the housing 213. When the elastic body 285 is a coil spring, the driving button 280 may be disposed in a state in which it is inserted into the coil spring. In this configuration, in order to maintain the elastic body 285 in an appropriate position, the front end housing 213 may be provided with a cylindrical casing 283 formed to protrude.

According to this configuration, the operator may press the driving button 280 with his/her thumb, or the like, in a state in which he/she holds a main housing 211 with his/her one hand. When the driving button 280 is pressed, the driving surface 281 moves forward while pressing the driving protrusion 225, such that the driving protrusion 225 (and the driving rod 220) moves upwardly (M). A subsequent process in which a receiving body 230 is aligned with a hitting body 240 due to the upward movement of the driving rod 220 and the hitting body 240 hits the receiving body 230 is the same as that of the above-mentioned exemplary embodiment.

In this case, the driving rod 220 is not pressed in a state in which it contacts the alveolar bone, but moves upwardly by the driving button 280, such that the alveolar bone of a patient is not pressed.

The hitting device for forming a hole by hitting an alveolar bone at a predetermined force as described above is not limited to the configurations and the operation schemes of the exemplary embodiments described above. The above-mentioned exemplary embodiments may also be variously modified through a selective combination of all or some thereof.

Claims

A hitting device for forming a hole by hitting an alveolar bone at a predetermined force, the hitting device comprising:

a hollow shaped housing having an internal space formed therein;

a driving rod inserted into the internal space in a state in which a front end portion thereof is exposed outside the internal space;

a receiving body coupled to the driving rod so as to be movable in a direction intersecting with an extension direction of the housing and having a receiving space opened at an upper portion thereof and including a bottom surface formed at a lower portion thereof;

a hitting body disposed at the internal space and elastically supported by the housing, such that if the hitting body becomes to be aligned with the opened upper portion of the receiving space, the hitting body hits the bottom surface, thereby transferring an impact to the front end portion; and

an inducing body installed at the internal space and inducing the receiving body to be changed from a state in which the receiving space is not aligned with the hitting device to a state in which the receiving space is aligned with the hitting device by the movement of the receiving body when the front end portion is moved in a direction toward the internal space.
The hitting device of claim 1, wherein the front end portion is formed to be offset with respect to an extension axis of a remaining portion of the driving rod.
The hitting device of claim 2, further comprising a mounting rod detachably coupled to the front end portion.
The hitting device of claim 3, wherein the front end portion includes a first screw thread formed at a free end thereof, and

the mounting rod is provided with a recess receiving the free end therein, and an inner surface of the recess is provided with a second screw thread coupled to the first screw thread.
The hitting device of claim 3, further comprising a stopper formed so that the mounting rod is fitted thereinto to thereby be detachably mounted on a protrusion part and formed to have a length at which it exposes a free end side of the mounting rod, wherein the mounting rod is further provided with the protrusion part protruding on an outer surface thereof.
The hitting device of claim 5, wherein the stopper includes:

a cylindrical body; and

a slot extended from one end portion of the body toward the other end thereof.
The hitting device of claim 2, wherein the driving rod further includes a key protruding on an outer surface thereof, and

the housing further includes a rail formed in an inner surface thereof to slidably receive the key therein.
The hitting device of claim 1, wherein the housing is provided with a penetrated and opened identification window, and

the driving rod further includes an indicating part visually confirmed through the identification window by the movement of the driving rod.
The hitting device of claim 1, further comprising:

a base coupled to the driving rod and receiving the receiving body therein; and

a biasing member connecting the base and the receiving body to each other to bias the receiving body toward one side of the driving rod to allow the receiving body to be positioned in a state in which the receiving body is not aligned with respect to the driving rod,

wherein the bottom surface of the receiving body is provided with a through-hole into which the driving rod is inserted.
The hitting device of claim 1, wherein the hitting body has a hollow portion into which the driving rod is movably inserted.
The hitting device of claim 1, wherein the inducing body protrudes in a ring shape from an inner surface of the housing and a surface of the inducing body facing the receiving body is formed as an alignment surface so that a width of the ring becomes gradually wide.
The hitting device of claim 1, further comprising a driving button having a driving surface contacting a driving protrusion to allow the driving rod to move toward the internal space and installed at the housing so as to be operable at an outer portion of the housing,

wherein the driving rod further includes the driving protrusion positioned at the internal space and protruding on an outer surface thereof.