Patent Publication Number: US-2022233274-A1

Title: Drill for dental implant procedure

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to and the benefit of Korean Patent Application No. 10-2021-0012259, filed in the Korean Intellectual Property Office on Jan. 28, 2021, the entire contents of which are incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     Field of the Disclosure 
     The present disclosure relates to a drill for dental implant procedure. More specifically, the present relates to a drill for dental implant procedure capable of minimizing the removal of alveolar bone by rotation in the case of forward rotation about a central axis and easily performing sinus lift without damaging the sinus membrane while compressing the bone density of the alveolar bone by rotation in the case of inverse rotation about the central axis. 
     Description of the Related Art 
     Recently, in dentistry, an implant technique for placing artificial teeth is rapidly spreading. However, many of the patients have an oral structure that makes it difficult for implant procedure to be performed, so they suffer from difficulties in implant procedure, and some doctors avoid such patients. In particular, there is a lot of difficulty when it is difficult to place the implant due to the lack of residual bone in the posterior teeth where the maxillary sinus is located. In this case, a method of lifting a sinus membrane to form a space and then transplanting a bone in secured space and placing the implant therein is used, which is divided into two types: a vertical approach and a lateral approach. 
     First, the vertical approach is a method when a certain amount of residual bone is secured at the implant site (the thickness of the residual bone is more than 4 mm thick), and the vertical approach is a method of tapping a maxilla several times with a tool called an osteotome (chisel and hammer) to make a hole with a diameter of 2 to 3 mm to prevent damage to the sinus membrane, and then inserting a graft bone through the hole little by little. This has the advantage of less swelling in the patient after the procedure because the treatment site is narrow, but since the maxillary sinus lining cannot be seen directly during the procedure, the procedure is checked with X-rays and the operation is carried out very carefully. For this reason, there are problems that the procedure takes a long time and a considerable discomfort to the patient occurs due to the blow in the procedure. 
     Next, the lateral approach is a method performed when the residual bone at the implant site is very insufficient (the thickness of the residual bone is less than 4 mm thick), and is the method of forming a hole (window) on the side of the sinus to lift the sinus membrane, and then bone graft is performed. This has the advantage that the sinus membrane can be lifted while looking directly at the sinus membrane during the procedure, so that damage to the sinus membrane is less likely, and even if damage occurs, post-treatment is possible, and rapid progress is possible because a desired amount of bone graft material can be quickly inserted at a time. But since the operation itself is difficult and a large valve must be formed, there is a problem that severe edema occurs after the operation, and such a procedure is avoided. 
     Recently, the sinus lift was performed using an implant drill. Technique using the implant drill may have the advantage that the patient reluctance is low and maxillary perforation is possible quickly and easily, but this could not avoid the phenomenon that the sinus is torn or curled up by a tip of a drill blade because there is no means to block the tip of the drill blade from contacting the sinus membrane at the moment the maxillary perforation is completed by the rotation of the drill blade. 
     PRIOR ART DOCUMENT 
     Patent Document 
     
         
         Korean Patent No. 10-1019121 
       
    
     SUMMARY 
     The present disclosure provides a drill for dental implant procedure capable of minimizing the removal of alveolar bone by rotation in the case of forward rotation about a central axis and easily performing sinus lift without damaging the sinus membrane while compressing the bone density of the alveolar bone by rotation in the case of inverse rotation about the central axis. 
     The present disclosure provides a drill for dental implant procedure capable of safely performing the implant procedure while giving a user a sense of trust by adjusting a length of the drill inserted into the maxillary sinus according to the state of the alveolar bone by fastening a stopper to a body portion of the drill. 
     In an aspect, there is provided a drill for dental implant procedure including: a body portion extending in a longitudinal direction and including cylindrical first and second rotating portions rotatable in both directions about a central axis, 
     In this case, the first rotating portion may include a cutting head portion disposed at a front end of the first rotating portion and including a tip surface with round shape; a first spiral groove portion connected to the cutting head portion and including at least one or more grooves along the spiral around the central axis; and a first cutting side surface portion connected to the first spiral groove portion and formed to have a slope inclined upward from the cutting head portion in the shape of a predetermined plate protruding from the central axis. 
     Furthermore, the second rotating portion formed integrally with the first rotating portion may include a second spiral groove portion connected to the first rotating portion and including at least one or more grooves along the spiral around the central axis; and a second cutting side surface portion connected to the first spiral groove portion and formed to have a slope inclined unward from the first rotating portion in the shape of a predetermined plate protruding from the central axis. 
     In addition, the first cutting side surface portion may include a first cutting right side surface portion rotating to be twisted so that an inclination sharply changes from the outside toward the central axis in a right direction about the central axis in the case of forward rotation; and a first cutting left side surface portion rotating to be twisted so that an inclination sharply changes sharply from the central axis to the outside in a left direction about the central axis in the case of inverse rotation. 
     Furthermore, the second cutting side surface portion may include a second cutting right side surface portion rotating to be twisted so that an inclination sharply changes from the outside toward the central axis in the right direction about the central axis in the case of forward rotation; and a second cutting left side surface portion rotating to be twisted so that an inclination sharply changes from the axis to the outside in the left direction about the central axis, 
     In this case, based on the central axis, a length of the second cutting right side surface portion may be formed longer than a length of the second cutting left side surface portion, and the second cutting side surface portion may include a cutting end surface portion formed in a round cross section and connecting the second cutting right side surface portion and the second cutting left side surface portion. 
     The first cutting side surface portion and the second cutting side surface portion may be rotated in the same direction at the same time in the case of forward rotation and inverse rotation. 
     The drill for dental implant procedure may further includes a stopper extending in the longitudinal direction corresponding to a shape of the body portion, formed in a cylindrical shape having a predetermined diameter, and screwed to an outer surface of the body portion. 
     In this case, the first cutting right side surface portion and the first cutting right side surface portion first may be rotating than the first cutting left side surface portion and the second cutting left side surface portion in the case of forward rotation. 
     The first cutting left side surface portion and the second cutting left side surface portion first may be rotating than the first cutting right side surface portion and the first cutting right side surface portion in the case of inverse rotation 
     In this case, the stopper may include a screw coupling groove including a first coupling groove coupled to an upper surface of the body portion and a second coupling groove coupled to a lower surface of the body portion, and an inner diameter of the first coupling groove may be larger than an inner diameter of the second coupling groove. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a view for explaining a drill for dental implant procedure according to an embodiment of the present disclosure. 
         FIG. 2  is a view for explaining a second cutting side surface portion shown in  FIG. 1 . 
         FIG. 3  is a view for explaining a state of use of a drill for dental implant procedure according to an embodiment of the present disclosure. 
         FIG. 4  is a view for explaining a state of use of a drill for dental implant procedure in the case of forward rotation. 
         FIG. 5  is a view for explaining a state of use of a drill for dental implant procedure in the case of inverse rotation. 
         FIG. 6  is a detailed view for explaining a drill for dental implant procedure according to another embodiment of the present invention. 
         FIG. 7  is a view for explaining coupling state of a stopper shown in  FIG. 5  and the drill for dental implant procedure. 
         FIG. 8  is a view for explaining a method of adjusting a length of a drill for dental implant procedure inserted into an implant hole using the stopper. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. 
     The specification describes in the embodiment for the present invention the term used in which relayed a number that is even endured. In the specification, a plurality type comprises a unit in a single may be phrase will not specially mentioned. Used in specification “(comprises) comprising” and/or “including (comprising)” at least one other handle components other components does not number the presence or addition times. The same drawing code which defines the same element throughout the specification, “and/or” ensures that all components and at least one each of a combination. Although “number  1 ”, “number  2 ” is used to describe various components or the like, these components are not one number by these terms the concave disclosed. These terms have only one component used to discriminate between other components are disclosed. The, hereinafter referred to as number  1  in technical idea of the present invention components may be as well as in number  2  component are disclosed. 
     Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It is noted that the use of any and all examples, or exemplary terms provided herein is intended merely to better illuminate the invention and is not a limitation on the scope of the invention unless otherwise specified. Further, unless defined otherwise, all terms defined in generally used dictionaries may not be overly interpreted. 
     Hereinafter, embodiments disclosed in the present disclosure will be described in detail with reference to the accompanying drawings. 
       FIG. 1  is a view for explaining a drill for dental implant procedure according to an embodiment of the present disclosure, and  FIG. 2  is a view for explaining a second cutting side surface portion shown in  FIG. 1 . 
     As shown in  FIG. 1 , a drill for dental implant procedure  1  according to an embodiment of the present disclosure may include a body portion  10  and a connection support portion  20 . In this case, the body portion  10  and the connection support portion  20  may be integrally formed, but are not limited thereto. 
     The body portion  10  may be formed in a cylindrical shape, and may include a first rotation portion  12 , a second rotation portion  14 , and a connection groove  16  formed between the first rotation portion  12  and the second rotation portion  14 . In this case, the first rotation portion  12 , the second rotation portion  14 , and the connection groove may be integrally formed and rotate in a forward direction (a right side) or an inverse direction (a left side). 
     In this embodiment, a length of the body portion  10  may be a maximum of 10 mm and a diameter of 3.1 mm to 3.7 mm, but is not limited thereto. For example, when the drill for dental implant procedure  1  is inserted into an implant hole  46 , the maximum diameter may be 3.1 mm when it is inserted with a length of 3.1 mm, the maximum diameter may be 3.7 mm when it is inserted with a length of 8 mm, and the maximum diameter may be 3.7 mm when it is inserted with a length of 10 mm. In this case, the length of the body portion  10  may be a length including the connection portion  22 . 
     The first rotating portion  12  is disposed at a front end of the body portion  10 , and an alveolar bone  40  may be perforated by rotation. 
     Specifically, the first rotating portion  12  may include a cutting head portion  120 , and a first spiral groove portion  122 . 
     The cutting head portion  120  may be disposed at the front end of the first rotating portion  12  and may include a cutting edge  1200 . 
     In the present embodiment, although the cutting head portion  120  is disclosed to have a round shaped tip surface, the present disclosure is not limited thereto. Here, the “round” shape may be a concept including a shape in which a curved section and a straight section are mixed such as rounded corners or even a semi-ellipse shape. 
     In this case, an upper surface of the cutting edge  1200  may be formed to be inclined downward toward the central axis. For example, the upper surface of the cutting edge  1200  may have a rounded outer surface shape in which the slope gradually becomes gentle from the outside to the center. 
     In addition, a side portion of the cutting edge  1200  may be formed to be inclined downward from an upper surface to a lower surface of the cutting edge  1200 . For example, the slope of the side portion of the cutting edge  1200  gradually becomes gentle from the top to the bottom, and a diameter of the upper surface may be formed smaller than a diameter of the lower surface. 
     When the cutting head portion  120  rotates in the forward direction according to the rotation of the body portion  10 , the cutting head portion  120  temporarily forms the implant hole  46  until the cutting edge  1200  contacts the surface of the alveolar bone  40  after the cutting edge  1200  touches the surface of the alveolar bone  40  first for perforation of the alveolar bone  40 . When the cutting edge  1200  contacts the alveolar bone  40 , cutting starts, and the implant hole  46  corresponding to the diameter of the implant may be formed. 
     In addition, in the upper molar implant procedure, the cutting head portion  120  may perforate an alveolar periosteum  42  of a maxillary sinus  44  so as not to reach the alveolar periosteum  42  in the maxillary sinus  44  by the rotation of the cutting edge  1200  in the case of inverse rotation according to the rotation of the body portion  10 . 
     The first spiral groove portion  122  may be formed as a spiral groove to discharge wastes such as bone fragments, blood, or saliva generated when the alveolar bone  40  is perforated. That is, bone fragments cut by the cutting edge  1200  may not be accumulated on the upper surface of the cutting edge  1200  and may be discharged to the outside through the first spiral groove portion  122 . 
     The first spiral groove portion  122  may be recessed along the spiral around the central axis extending in a longitudinal direction of the body portion  10 . In this case, the horizontal cross-section of the first spiral groove portion  122  may have a fan shape, and preferably may have a fan shape having a central angle of 30 degrees to 60 degrees. 
     In the present embodiment, the first spiral groove portion  122  is disclosed as three, but the present invention is not limited thereto, and three or more may be provided. 
     For example, when a plurality of the first spiral groove portions  122  are provided, each of the first spiral groove portions  122  may be formed to be spaced apart from each other at equal intervals. 
     The first cutting side surface portion  124  may be formed to have a slope inclined upward from the cutting head portion  120  to the first cutting side surface portion  124  in the shape of a predetermined plate protruding from the central axis, and may be include the first cutting right side surface portion  1240  and a first cutting left side surface portion  1242 . In this case, the first cutting side surface portion  124  may be formed in a rhombic shape, but is not limited thereto. 
     The first cutting right side surface portion  1240  may remove the alveolar bone  40  by the rotation of the body portion  10 , and the first cutting left side surface portion  1242  may not remove the alveolar bone  40 . That is, the first cutting right side surface portion  1240  may be formed of a surface capable of cutting, and the first cutting left side surface portion  1242  may be formed of a surface not capable of cutting. 
     For example, in the case of forward rotation, the first rotating portion  12  may be rotated to be twisted so that an inclination changed sharply from the outside toward the central axis in a right direction about the central axis, so that the first cutting right side surface portion  1240  may remove the alveolar bone  40 . In addition, in the case of inverse rotation, the first rotating portion  12  may be rotated to be twisted so that the inclination changes sharply from the central axis toward the outer side in the left direction about the central axis, so that the first cutting left side surface portion  1242  may perforate the alveolar periosteum  42  of the maxillary sinus  44  so as not to the alveolar periosteum  42  in the maxillary sinus  44  without removing the alveolar bone  40 . 
     In the case of forward rotation, when the implant hole  46  formed up to the alveolar bone  40  located under the alveolar periosteum  42  of the maxillary sinus  44  so as not to reach the alveolar periosteum  42  in the maxillary sinus  44  does not match the diameter of the implant, the first rotation portion  12  as described above may be operated to match the diameter of the implant by minimizing the removal of the alveolar bone  40 . 
     In addition, in the case of inverse rotation, in the upper molar implant procedure, the first rotating portion  12  may minimize damage to the alveolar periosteum  42  while facilitating perforation, and the upper end of the alveolar bone  40  may be easily lifted toward the maxillary sinus  44  along with the alveolar periosteum  42 . 
     The second rotating portion  14  may include a second spiral groove portion  140  and a second cutting side surface portion  142 . 
     The second spiral groove portion  140  may be formed as a spiral groove to discharge wastes such as bone fragments, blood, or saliva generated when the alveolar bone  40  is perforated. That is, bone fragments cut by the cutting edge  1200  may not be accumulated on the upper surface of the cutting edge  1200  and may be discharged to the outside through the first spiral groove portion  122  and the second spiral groove portion  140 . 
     The second spiral groove portion  140  may be recessed along the spiral around the central axis extending in a longitudinal direction of the body portion  10 . In this case, the horizontal cross-section of the second spiral groove portion  140  may have a fan shape, and preferably may have a fan shape having a central angle of 30 degrees to 60 degrees. 
     In the present embodiment, the second spiral groove portion  140  is disclosed as three same as the first spiral groove  122 , but the present invention is not limited thereto, and three or more may be provided. 
     For example, when a plurality of the second spiral groove portions  140  are provided, each of the second spiral groove portions  140  may be formed to be spaced apart from each other at equal intervals. 
     The second cutting side surface portion  142  may be formed to have a slope inclined upward from the first rotation portion  12  to the second cutting side surface portion  142  in the shape of a predetermined plate protruding from the central axis, and may be include the second cutting right side surface portion  1420 , and a second cutting left side surface portion  1422 . In this case, the second cutting side surface portion  142  may be formed in a rhombic shape, but is not limited thereto. In this case, based on the central axis, a length of the second cutting right side surface portion  1420  may be formed longer than a length of the second cutting left side surface portion  1422 . 
     Referring to  FIG. 2 , the second cutting right side surface portion  1420  may have a sharp cross section. That is, the second cutting right side surface portion  1420  may be made of a surface capable of cutting, and, in the case of forward rotation, the alveolar bone  40  may be removed. In contrast, in the case of inverse rotation, the second cutting left side surface portion  1422  may push the alveolar bone  40  to expand the alveolar bone  40 . 
     Unlike the cutting right side surface portion  1420 , the second left cutting side surface portion  1422  may have a blunt cross section that is not sharp. That is, the second cutting left side surface portion  1422  may be formed as a surface that is not capable of cutting. 
     Depending on the embodiment, may be include a cutting end surface portion an end surface connecting the second cutting right side surface portion  1420  and the second left cutting side surface portion  1422 , and may be formed in a round shape, but is not limited thereto. For example, the cutting end surface portion may be formed to be rounded from the end of the second cutting right side surface portion  1420  toward the second left cutting side surface portion  1422 . 
     In the case of forward rotation, the second rotating portion  14  may be rotated to be twisted so that an inclination changed sharply from the outside toward the central axis in a right direction about the central axis, so that the second cutting right side surface portion  1420  as described above may remove the alveolar bone  40 . That is, in the case of forward rotation, the second cutting side surface portion  142  may perform a role of a cortical drill. 
     In addition, in the case of inverse rotation, the second rotating portion  14  may be rotated to be twisted so that the inclination changes sharply from the central axis toward the outer side in the left direction about the central axis, so that, by pushing the alveolar bone  40  in the rotational direction without removing the alveolar bone  40 , the second cutting left side surface portion  1422  may easily and conveniently performs sinus lift without damaging the sinus membrane while increasing the stiffness of the alveolar bone  40  by expanding the alveolar bone  40  and compressing the bone density of the alveolar bone  40 . 
     Therefore, when the alveolar bone  40  is removed to match the diameter of the implant after forming the implant hole  46 , the second cutting side surface portion  142  may be performed to match the diameter of the implant by minimizing the removal of the alveolar bone  40  by using the drill for dental implant procedure  1  having a diameter smaller than the initial diameter of the implant hole  46 . 
     For example, if the fixture diameter of the drill for dental implant procedure  1  used when the implant hole  40  was first formed is 4.5, when the alveolar bone  40  is removed to match the diameter of the implant, the removal of the alveolar bone  40  may be minimized by using the drill for dental implant procedure  1  with a 4.0 fixture diameter. 
     In the case of forward rotation, when the implant hole  46  formed up to the alveolar bone  40  located under the alveolar periosteum  42  of the maxillary sinus  44  so as not to reach the alveolar periosteum  42  in the maxillary sinus  44  does not match the diameter of the implant, the second rotation portion  14  as described above may be operated to match the diameter of the implant by minimizing the removal of the alveolar bone  40 . 
     In addition, in the case of inverse rotation, the second rotating portion  14  may compress the bone density of the alveolar bone  40  and reinforces the rigidity of the alveolar bone  40  by pushing the alveolar bone  40  in both directions, and may facilitate perforation and minimize damage to the alveolar periosteum  42  by preventing damage to the alveolar bone  40  due to vibration, and may easily lift the upper end of the alveolar bone  40  together with the alveolar periosteum  42  toward the maxillary sinus  44 . 
     The connection groove  16  may be a groove that has a predetermined width on the outer circumferential surface of the body portion  10  and is recessed along a circumference formed with a central axis as a rotation center. 
     Specifically, the connection groove  16  may be formed to have a predetermined width between the first rotation portion  12  and the second rotation portion  14 . That is, the horizontal cross-section of the connection groove  16  may be formed in a circular shape having a predetermined diameter corresponding to the circular shape of the body portion  10 , but is not limited thereto. 
     In the present embodiment, although the connection groove  16  is disclosed as one, the present disclosure is not limited thereto, and one or more may be provided. 
     For example, when a plurality of connection grooves  16  are provided, a diameter of the connection groove  16  formed on the side of the first rotation portion  12  and the connection groove  16  formed on the side of the second rotation portion  12  may be different from a diameter of the first rotation portion  12  and a diameter of the second rotation portion  14 . 
     In this case, each of the connection grooves  15  may be formed to be spaced apart from each other at the same interval, but the present disclosure is not limited thereto. 
     Depending on the embodiment, the connection groove  16  may be omitted. 
     One side of the connection support portion  20  may extend in the longitudinal direction and be connected to a lower portion of the body portion  10  by extending in the longitudinal direction, and the other side may be connected to an electric motor (not shown). 
     In addition, the connection support portion  20  may be formed under the body portion  10  by a connection portion  22  having screw threads on the outer circumferential surface of the part connected to the second rotation portion  14  of the body portion  10 . The connection portion  22  may include a plurality of spiral grooves recessed along the spiral. 
     In this case, the connection support portion  20  may be made of the same material as the body portion  10 , but is not limited thereto. 
     The connection support portion  20  may transmit the rotational power generated from the electric mechanism to the body portion  10 , and make the body portion  10  rotate in the forward direction or inverse direction. 
       FIG. 3  is a view for explaining a state of use of a drill for dental implant procedure according to an embodiment of the present disclosure.  FIG. 4  is a view for explaining a state of use of a drill for dental implant procedure in the case of forward rotation,  FIG. 4( a )  is a view for explaining a forward rotation state, and  FIG. 4( b )  is a view for explaining a forward rotation method.  FIG. 5  is a view for explaining a state of use of a drill for dental implant procedure in the case of inverse rotation,  FIG. 5( a )  is a view for explaining an inverse rotation state, FIG.  5 ( b ) is a view for explaining an inverse rotation method. 
     First, referring to  FIG. 3 , when the body portion  10  is rotated by the rotational power transmitted from the connection support portion  20 , the first cutting right side surface portion  1240  of the first cutting side surface portion  124  of the first rotation portion  12  and the second cutting right side surface portion  1420  of the second cutting side surface portion  142  of the second rotation portion  14  may be removed, the first cutting left side surface portion  1242  of the first cutting side surface portion  124  of the first rotation portion  12  and the second cutting left side surface portion  1422  of the second cutting side surface portion  142  of the second rotation portion  14  may not be removed. 
     For example, in the case of forward rotation, the first rotating portion  12  may be rotated to be twisted so that an inclination changed sharply from the outside toward the central axis in a right direction about the central axis as shown in  FIG. 4( a ) , and the second rotating portion  14  may be rotated to be twisted so that an inclination changed sharply from the outside toward the central axis in a right direction about the central axis as shown in  FIG. 4( b ) , so that the second cutting right side surface portion  1420  may remove the alveolar bone  40 . That is, in the case of forward rotation, the first cutting right side surface portion  1240  of the first cutting side surface portion  124  of the first rotation portion  12  and the second cutting right side surface portion  1420  of the second cutting side surface portion  142  of the second rotation portion  14  first rotating than the first cutting left side surface portion  1242  of the first cutting side surface portion  124  of the first rotation portion  12  and the second cutting left side surface portion  1422  of the second cutting side surface portion  142  of the second rotation portion  14  may remove the alveolar bone  40 . 
     And, in the case of inverse rotation, the second rotating portion  14  may be rotated to be twisted so that the inclination changes sharply from the central axis toward the outer side in the left direction about the central axis as shown in  FIG. 5( a ) , so that the first cutting left side surface portion  1242  may perforate the alveolar periosteum  42  of the maxillary sinus  44  so as not to the alveolar periosteum  42  in the maxillary sinus  44  without removing the alveolar bone  40  as shown in  FIG. 5( b ) . Furthermore, the second rotating portion  14  may be rotated to be twisted so that the inclination changes sharply from the central axis toward the outer side in the left direction about the central axis, so that, by pushing the alveolar bone  40  in the rotational direction without removing the alveolar bone  40 , the second cutting left side surface portion  1422  may easily and conveniently performs sinus lift without damaging the sinus membrane while increasing the stiffness of the alveolar bone  40  by expanding the alveolar bone  40  and compressing the bone density of the alveolar bone  40 . That is, in the case of inverse rotation, the first cutting left side surface portion  1242  of the first cutting side surface portion  124  of the first rotation portion  12  and the second cutting left side surface portion  1422  of the second cutting side surface portion  142  of the second rotation portion  14  first rotating than the first cutting right side surface portion  1240  of the first cutting side surface portion  124  of the first rotation portion  12  and the second cutting right side surface portion  1420  of the second cutting side surface portion  142  of the second rotation portion  14  may by pushing the alveolar bone  40 . 
       FIG. 6  is a detailed view for explaining a drill for dental implant procedure according to another embodiment of the present invention,  FIG. 7  is a view for explaining coupling state of a stopper shown in  FIG. 5  and the drill for dental implant procedure,  FIG. 8  is a view for explaining a method of adjusting a length of a drill for dental implant procedure inserted into an implant hole using the stopper,  FIG. 8( a )  is a view for explaining a method of lengthening the length of the drill for dental implant procedure, and  FIG. 8( b )  is a view for explaining a method of shortening the length of the drill for dental implant procedure. 
     As shown in  FIG. 6  and  FIG. 7 , the drill for dental implant procedure  2  may include a stopper  30  screwed to the outer surface. 
     Except for the stopper  30  shown in  FIG. 6  and  FIG. 7 , it may have the same features as the drill for dental implant procedure  1 . 
     In  FIG. 6  and  FIG. 7  below, detailed descriptions of content overlapping with those described in  FIG. 1  may be omitted, and different points may be mainly described. Accordingly, components that perform the same functions as those of the dental implant procedure drill shown in  FIG. 6  and  FIG. 7  are denoted by the same reference numerals as in  FIG. 1  and detailed descriptions thereof will be omitted. 
     The stopper  30  may be coupled to the outer surface of the drill for dental implant procedure  1  by a screw adjustment method. 
     A cylindrical body portion  32  may extend in the longitudinal direction corresponding to the shape of the body portion  10  and may be formed in a cylindrical shape having a predetermined diameter. 
     Specifically, the cylindrical body portion  32  may have a screw coupling groove  34  therein so that it can be screwed in correspondence with the screw groove of the connection portion  22 . 
     An inner diameter of the screw coupling groove  34  may be the same as or larger than the maximum diameter of the body portion  10 , but is not limited thereto. 
     For example, a diameter of the first coupling groove  340  coupled to the upper surface of the body portion  10  may be larger than a diameter of the second coupling groove  342  coupled to the lower surface of the body portion  10 . 
     In other words, by adjusting the positions of the first coupling groove  340  and the second coupling groove  342  having different diameters corresponding to the outer surface of the body portion  10 , it is possible to lengthen the length of the drill for dental implant procedure  2 . 
     For example, when it is necessary to lengthen the length of the drill for dental implant procedure  2  according to the depth of the alveolar bone  40  as shown in  FIG. 8( a ) , the second coupling groove  342  of the cylindrical body portion  32  may be disposed on the outer surface of the connection support portion  20  by screwing the cylindrical body portion  32  toward the connection support portion  20 , that is, inverse rotation. 
     Unlike this, when it is necessary to shorten the length of the drill for dental implant procedure  2  according to the depth of the alveolar bone  40  as shown in  FIG. 8( b ) , the first coupling groove  340  of the cylindrical body portion  32  may be disposed on the outer surface of the first rotating portion  12  by screwing the cylindrical body portion  32  toward the body portion  10 , that is, forward rotation. 
     The steps of a method or algorithm described in connection with the embodiments of the present disclosure may be implemented directly in hardware, implemented as a software module executed by hardware, or a combination thereof. Software may also reside on random access memory (RAM), read only memory (ROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), flash memory, hard disk, removable disk, CD-ROM, or any type of computer-readable recording medium well known in the art to which the present disclosure pertains. 
     In the above, embodiments of the present disclosure have been described with reference to the accompanying drawings, but those of ordinary skill in the art to which the present invention pertains will be able to understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the embodiments described above are illustrative in all respects and should be understood as non-limiting.