Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`IMPLANT SURGERY DRILL
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`TECHNICAL FIELD
`
`[01]
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`The present invention relates to a surgery drill for dental implant capable of perforate grooves
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`in an alveolar bone, specifically, to prevent accidents in advance by actively reinforcing
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`coupling force between a cutting part for cutting the alveolar bone and a connecting part for
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`connecting the cutting part to a handpiece.
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`BACKGROUND ART
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`[02]
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`In general, implant surgery is a dental treatment technique in which a biocompatible implant
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`10
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`body is implanted in positions wherethere is loss of extraction, so as to restore the function of
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`the natural teeth. The method for implanting an implant body may be classified according to
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`implant positions such as endosseous implant, submucosal implant, bone penetrating type
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`implant, and endodontic implant, and recently, a method of using a handpiece after forming a
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`perforation in an alveolar bone and coupling a thread-type implantis often used.
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`15
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`[03]
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`Meanwhile, since an implant type may be determined according to diameter, depth, and angle,
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`the precise a drilling is emerging, as well as securing safety of drill without damaging other
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`regions of the oral cavity of a treated patient.
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`[04]
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`Accordingly, a surgical drill for dental implant with enhanced functions such as usability,
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`cleanliness, preciseness and safety 1s continuously developed, and as an example, a "surgical
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`20
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`drill for implant” is disclosed in Korean Patent Application Publication No. 10-119662, and
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`the above-mentioned prior art includes a cutting part for cutting the alveolar bone and a
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`connecting part protruding downward from the bottom surface of the cutting part that is
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`coupled with a handpiece, and in particular, it is a technique that the cutting part has a
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`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`cylindrical shape with a diameter decreasing as towards the lowerpart and a plurality of saw
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`teeth are arranged in a circularly to form a perforation with a minimaldrilling.
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`[05]
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`In order to safely and precisely implant the patient's alveolar bone, the methodis carried out
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`by gradually expanding a perforation of small diameter while varying the size of the drill, and
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`the above-mentioned prior art has to
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`abide the inconvenience of separating both the
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`connecting part and the cutting part from each other in the handpiece, furthermore, there has
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`been a problem thatall the connecting parts, which are configured integrally when the cutting
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`part is replaced due to wear, haveto be replaced.
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`[06]
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`To solve such a problem,there is provided a surgical drill for dental implant in which a cutting
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`10
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`part and a connecting part are provided separately, and as an example, a "surgical drill for
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`implant” is disclosed in Korean Patent Application Publication No. 10-1711613. This is a
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`technique, in which a cutting part for forming a perforation in the alveolar bone, a connecting
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`part for connecting the cutting part, and the handpiece are configured to be disassembled and
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`coupled with each other, so that machinability is improved in manufacturing a drill as well as
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`15
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`storing and maintenance after use is made easy. A mutual coupling of the cutting part and the
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`connecting part as described above,a bolt part is provided on the bottom surface of the cutting
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`part, and a nut is further provided on the uppersurface of the connecting part for a rotational
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`coupling.
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`[07]
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`On the other hand, as a method of forming a precise perforation in a patient's alveolar bone
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`20
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`while varying the size of drill and expanding a perforation of the small diameteris performed,
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`accordingly, a repetitive replacementis carried out from the cutting part to the connectingpart.
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`[03]
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`Further, in general, a nut part is more likely to wear due to weakerdurability thereof compared
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`to a bolt part, wherein the durability of the connecting part is subjected to a serious wear while
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`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`a plurality of cutting part are replaced and used in one connecting part. In addition, the cutting
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`part also induces to replacement use for a certain period of time due to wear while cutting the
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`alveolar bone and hygiene and maintenance problems dueto the intricate configuration, and
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`an economic burden on use has emerged.
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`5
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`[09]
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`Accordingly, there is a demand for a technique capable of minimizing economical burden by
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`actively extending the replacement period as much as the connecting part even when the
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`cutting part is used due to wear and hygiene problems caused by perforation process on the
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`alveolar bone.
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`DISCLOSURE OF INVENTION
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`10
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`TECHNICAL PROBLEM
`
`[10]
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`Therefore, the present invention has been made to more actively solve the above-mentioned
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`problems, and an object of the present invention is to provide a surgical drill for dental
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`implant, which not only actively reinforcing coupling force between a cutting part and a
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`connecting part, but also ensures durability and lifespan of the connecting part even the
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`15
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`cutting part is replaced frequently.
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`TECHNICAL SOLUTION
`
`[11]
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`To accomplish the above object, according to one aspect of the present invention, there is
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`provided a surgical drill for dental implant comprising: a cutting part 10 having a plurality of
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`cutting blades that comprise saw teeth andare aligned in a circular shape so as to perforate the
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`20
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`alveolar bone; and a connecting part 20 interposed between the handpiece andthe cutting part,
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`wherein, specifically, the cutting part 10 including: the saw teeth 11 aligned in a circular shape
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`at the upper end thereof; a cutting upper part 12 extending downward from the saw teeth; a
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`cutting lower part 13 protruding downward from the cutting upper part with an expanded
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`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`diameter; and a coupling hole 14 recessed from the bottom surface of the cutting lower part so
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`as to guide the insertion of the connecting part, the connecting part 20 including: a coupling
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`protrusion 21 inserted and interposed in the coupling hole of the cutting part; a stepped part
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`22 protruding downward from the bottom of the coupling protrusion with an expanded
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`diameter, and constraining the insertion length of the coupling hole; and an extendedpart 23
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`extendedly protruding from the bottom surface of the stepped part so as to be connected to the
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`handpiece, and the coupling protrusion 21 further has threads on the outer periphery thereof,
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`and the coupling hole 14 further has threaded grooves corresponding to the threads of the
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`coupling protrusion, so that the coupling protrusion and the coupling hole are fastened to each
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`10
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`other by a bolt fastening method.
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`[12]
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`The bottom surface of the cutting lower part 13 includes an extending protrusion 15 having a
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`smaller diameter protruding downwards comparedto the outer periphery of cutting lowerpart;
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`and a recessed part 24
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`corresponding to the extending protrusion that is further provided on
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`the upper surface of the stepped part 22, thereby reinforcing coupling force according to an
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`15
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`expansion of insertion depth between a coupling hole and a coupling protrusion, anda friction
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`area between a protrusion part and a recessedpart.
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`[13]
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`In addition, a plurality of latch protrusions 15a having a sloped surface at one side is provided
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`at the lower end of the extending protrusion 15, and a plurality of holding protrusions 24a
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`corresponding to the latch protrusions is further provided so as to prevent from undesirable
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`20
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`separations by latching each other whenfastened.
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`[14]
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`The outer periphery of the cutting lower part 13 may include a number marked according to
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`the diameter of the cutting part.
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`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`[15]
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`A surgical drill for dental implant according to another embodimentof the present invention
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`configured to include: a cutting part 10 having a plurality of cutting blades that include saw
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`teeth and are alignedin a circular shape so as to perforate the alveolar bone; and a connecting
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`part 20 interposed between the handpiece and the cutting part, wherein, the cutting part 10
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`including: the saw teeth 11 aligned in a circular shape at the upper end thereof; a cutting upper
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`part 12 extending downward from the saw teeth; a cutting lower part 13 protruding downward
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`from the cutting upper part with an expanded diameter; and a coupling part 16, in which at
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`least one or more protruding downwardly from the bottom surface of the cutting lowerpart,
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`the connecting part 20 including: a coupling protrusion 21 inserted to the internal space of the
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`10
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`cutting part; a stepped part 22 protruding downward from the bottom of the coupling
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`protrusion with an expanded diameter, and constraining the insertion length of the coupling
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`hole; and an extended part 23 extendedly protruding from the bottom surface of the stepped
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`part so as to be connected to the handpiece, and the coupling protrusion 21 further has threads
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`on the outer periphery thereof, and the coupling hole 25 formed to pass therethrough in the
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`15
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`same position as the coupling part 16, and a fixing nut 30 fastening to some exposed portions
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`of the coupling part 16 on the bottom surface of a stepped part 22 by passing the coupling
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`space 25.
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`ADVANTAGEOUS EFFECTS
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`20 [16]
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`According to the present invention including the configuration as described above, as the
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`integration is achieved by fastening a screw thread between a coupling hole provided on the
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`bottom surface of the cutting part and a coupling protrusion provided on the upper surface of
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`the connecting part,
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`the abrasion of the coupling protrusion due to assembling and
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`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`disassemblingin a repetitive replacement may be actively reduced to secure the durability and
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`lifespan of the connectingpart.
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`[17]
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`According to the present invention, latch protrusions and holding protrusions are further
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`provided between a coupling hole and a coupling protrusion so that protection is given for
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`decoupling due to a mutual cross-latching.
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`[18]
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`According to the present invention, the cutting part is formed by a combination ofat least one
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`coupling part protruding downwardfrom the bottom surface of the cutting part and a coupling
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`hole formed in the stepped part and a fixing nut that passes through the coupling hole and a
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`portion of the coupling part exposed to the bottom surface of the stepped part. As the coupling
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`10
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`force between the connecting parts is reinforced, and the precise perforation may stably
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`performed, so that an advantage of creating a more comfortable implant environment is
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`expected.
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`BRIEF DESCRIPTION OF THE DRAWINGS
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`15 [19]
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`Fig. 1 is a perspective view of a surgical drill for dental implant according to an embodiment
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`of the present invention.
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`[20]
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`Fig. 2 is an exploded perspective view ofFig. 1.
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`[21]
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`Fig. 3 is a perspective view of a surgical drill for dental
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`implant according to another
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`embodimentof the present invention.
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`20 [22]
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`Fig. 4 is a partially enlarged view ofFig. 3.
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`[23]
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`Fig. 5 is a perspective view of a surgical drill for dental implant according to an embodiment
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`of the present invention.
`
`[24]
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`Fig. 6 is a sectional view ofFig. 5.
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`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`BEST MODE FOR CARRYING OUT THE INVENTION
`
`[25]
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`Hereinafter, a configuration, operations, and effects of the present invention will be disclosed
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`with reference to the attached drawings.
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`5 [26]
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`Objects, characteristics and advantages of the present
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`invention will be more clearly
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`understood from the detailed description as will be described below and the attached drawings.
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`Before the present invention is disclosed and described,itis to be understoodthat the disclosed
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`embodiments are merely exemplary of the invention, which can be embodiedin various forms.
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`Therefore, specific structural and functional details disclosed herein are not to be interpreted
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`10
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`as limiting, but merely as a basis for the claims and as a representative basis for teaching one
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`of ordinary skill
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`in the art
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`to variously employ the present invention in virtually any
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`appropriately detailed structure. The corresponding parts in the embodiments of the present
`
`invention are indicated by corresponding reference numerals.
`
`[27]
`
`The present invention relates to a surgical drill for dental implant to perforate a groove in the
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`15
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`alveolar bone.
`
`[23]
`
`Accordingto the present invention, aboveall, there provided a surgical drill for dental implant
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`that prevents accidents in advance by actively reinforcing coupling force between a cutting
`
`part for cutting the alveolar bone and a connecting part for connecting the cutting part to a
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`handpiece.
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`20 [29]
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`Fig. 1 is a perspective view perspective view of a surgical drill for dental implant according to
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`a preferred embodiment of the present invention, and Fig. 2 is an exploded perspective view
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`showing a combination relation between a coupling part perforating a groove in the alveolar
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`bone and a connecting part connecting the handpiece.
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`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`[30]
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`As shown in Fig. 1 and Fig. 2, a surgical drill for dental implant of the present invention may
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`be configured to include a cutting part 10 having a plurality of cutting blades that comprise
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`saw teeth and are aligned in a circular shape so as to perforate the alveolar bone; and a
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`connecting part 20 interposed between the handpiece and the cutting part.
`
`5 [31]
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`The cutting part 10 may further include a cylindrical shape of cutting upper part 12 having a
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`hollow part formedinternally by communicating between top and bottom; saw teeth 11 having
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`an alignmentin a circular shape on the upper end thereof; a cutting lower part 13 protruding
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`downward from the cutting upper part with an expanded diameter; and a coupling hole 14
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`recessed from the bottom surface of the cutting lower part so as to guide the insertion of the
`
`10
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`connecting part.
`
`[32]
`
`The saw teeth 11 may be aligned in a circular shape on the front end of the cylinder, and having
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`a sloped surface at one side. A plurality of saw teeth 11 having the same configuration
`
`described above maycut a patient's alveolar bone in a circular shape while makinga rotation
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`about by a handpiece.
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`15 [33]
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`The cutting upper part 12 may be extended downward from the saw teeth and gradually
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`expands the diameter from the center thereof. A tapered cutting upper part 12 having a gradual
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`expansion of the diameter may guide to minimize the size replacement of the cutting part as
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`the diameter gradually expand as the alveolar bone ofthe patient is cut, as well as precisely
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`cut the alveolar bone.
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`20 [34]
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`In addition, the cutting upper part 12 further provided with a penetrating part 12a so as to
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`communicate with an internal hollow part at a constant interval at one side, thereby friction
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`heat generated between the cutting upper part and the alveolar bone may be dissipated to
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`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
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`outside via the penetrating part and the hollow part, furthermore, fragments introduced from
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`cutting the alveolar bone may be collected in the hollow part through the penetrating part.
`
`[35]
`
`The cutting lower part 13 may be protruding downward from the bottom with an more
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`expanded diameter than the cutting upper part, and a space for guiding the coupling of
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`connecting part 20, as described in greater detail below, may be provided, while providing a
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`surface for assembling the cutting part so that a user can grip the outer periphery of the cutting
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`lowerpart.
`
`[36]
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`Meanwhile, on the outer periphery of cutting lowerpart including a number markedaccording
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`to the diameter of the cutting part, therefore, a user may easily distinguish the size of the
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`10
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`cutting part from the number marked.
`
`[37]
`
`The coupling hole 14 may be recessed towards the center from the bottom surface of the
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`cutting lower part 13, and consequently, the coupling hole is formed to communicate with the
`
`internal space of the cutting upper part. Specifically, the coupling hole 14 further provided
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`with a helical shaped screw thread in the internal circumference and guides a coupling of
`
`15
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`connecting part 20 as described in greater detail below.
`
`[33]
`
`The connecting part 20 is configured to include a coupling protrusion 21 inserted and
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`interposed to the coupling hole of the cutting part, a stepped part 22 protruding downward
`
`from the bottom of the coupling protrusion with an expanded diameter, and constraining the
`
`insertion length of the coupling hole; and an extended part 23 extendedly protruding from the
`
`20
`
`bottom surface of the stepped part so as to be connected to the handpiece.
`
`[39]
`
`The coupling protrusion 21 may be comprised in the length corresponding to the depth of the
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`coupling hole 14, and a threaded grooveis given so as to coupled with a helical shaped screw
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`thread formed in the coupling hole correspondingly.
`
`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`[40]
`
`The stepped part 22 is formed such that protruded in a constant thickness with slightly
`
`expanded diameter compared to the coupling protrusion, wherein, the diameter of the stepped
`
`part is identical to the diameter of the cutting lower part, and may result fineness in terms of
`
`exterior of a surgical drill for dental implant.
`
`5 [41]
`
`The stepped part 22 may provide a gripping surface that guides the user's gripping like the
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`cutting lower part 13 in the process of mounting the connecting part 20 and cutting part 10,
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`and constrain the depth of the coupling protrusion 21 inserted to the coupling hole 14.
`
`[42]
`
`The extended part 23 at the endis fixedly coupled with a handpiecein the axis of protruding
`
`downwards from the bottom surface of the stepped part 22, and transfer the rotational power
`
`10
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`provided from the handpieceto the cutting part 10.
`
`[43]
`
`The cutting part 10 and the connecting part 20 including the configuration as described above
`
`may firmly fasten by rotation in the state of the coupling protrusion 21 disposed in the bottom
`
`surface of the coupling hole 14. By arranging the coupling hole 14 with slightly weak
`
`durability in the cutting part 10, and a coupling protrusion 21 with better durability compared
`
`15
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`to the coupling hole arranged to the connecting part 20, abrasion of the connecting part due to
`
`coupling and disassembling of the cutting part is prevented so as to improve the durability and
`
`lifespan of connecting part.
`
`[44]
`
`Fig. 3 and 4 are perspective viewsillustrating a coupling relation of a cutting part and a
`
`connecting part configured according to another embodimentof the present invention.
`
`20 [45]
`
`Asillustrated in Fig. 3, a surgical drill for dental implant of the present invention may further
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`include an extending protrusion 15 having a smaller diameter protruding downwards
`
`compared to an outer periphery of the cutting lower part so as to expand the insertion depth;
`
`and a recessed part 24 corresponding to the extending protrusion on the uppersurface.
`
`10
`
`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`[46]
`
`For example, the extended protrusion 15 and a recessed part 24 are merely an example to help
`
`understand the present disclosure, and are not intendedto limit the present invention. It should
`
`also be appreciated that the cutting lower part 13 and the stepped part 22 may be configured
`
`as various types of protrusion and recessed parts within the spatial range.
`
`5
`
`[47]
`
`Meanwhile, as shownin Fig. 4, a surgical drill for dental implant of the present invention may
`
`further include a plurality of latch protrusion 15a having sloped surface at each one sides
`
`facing surfaces of extending protrusion 15 and a recessed part 24 respectively, and a plurality
`
`of holding protrusion 24a corresponding to the latch protrusion, so as to prevent from
`
`undesirable separations by latching each other when fastened.
`
`10
`
`[43]
`
`Fig. 5 and 6 are perspective views are another embodimentof the present inventionillustrating
`
`the reinforced coupling force of a surgical drill for dental implant by further implementing a
`
`fixing nut in the coupling relation between the cutting part and connecting part.
`
`[49]
`
`Asillustrated in Fig. 5, a surgical drill for implant of the present invention may be configured
`
`to include a cutting part 10 having a plurality of cutting blades that comprise saw teeth and are
`
`15
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`aligned in a circular shape so as to perforate the alveolar bone; and a connecting part 20
`
`interposed between the handpiece and the cutting part.
`
`[50]
`
`The cutting part 10 is configured to including the saw teeth 11 aligned in a circular shape at
`
`the upper end thereof; a cutting upper part 12 extending downward from the saw teeth; a
`
`cutting lower part 13 protruding downward from the cutting upper part with an expanded
`
`20
`
`diameter; and a coupling part 16 at least one or more protruding downwardly from the bottom
`
`surface of the cutting lower part, the connecting part 20 including: a coupling protrusion 21
`
`inserted to the internal space of the cutting part; a stepped part 22 protruding downward from
`
`the bottom of the coupling protrusion with an
`
`11
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`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`[S1]
`
`expanded diameter, and constraining the insertion length of the coupling hole; and an extended
`
`part 23 extendedly protruding from the bottom surface of the stepped part so as to be connected
`
`to the handpiece, and the coupling protrusion 21 further has threads on the outer periphery
`
`thereof, and the coupling hole 25 included to pass therethrough in the same position as the
`
`coupling part 16, and a fixing nut 30 fastening to some exposed portions of the coupling part
`
`16 on the bottom surface of a stepped part 22 by passing the coupling space 25.
`
`[52]
`
`Asillustrated in Fig. 6, a plurality of coupling part protruded downwardly to the bottom
`
`surface of the cutting lower part 13 may enter into a coupling hole 25 formed in the same
`
`position as the coupling part on the stepped part, and someportionsat the end may be arranged
`
`10
`
`in the bottom surface of the stepped part exposed. A fixing nut 30 may be entered from the
`
`extended part 23 of connecting part 20, so as to the stepped part 22 mayberotationally coupled
`
`to the exposed coupling part 16, here, the cutting lower part 13 and a nut both apply pressure
`
`to the stepped part having a stepped part therebetween,resulting a firm fastening. In particular,
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`a coupling holel4 and a coupling protrusion 21 or a coupling part 16 and a fixing nut 30 of
`
`15
`
`the present invention are both configured threaded groove andthread in opposite directions to
`
`the direction in which the handpiece rotates,
`
`so as to completely prevent undesired
`
`disassembly of the cutting part 10 on the connecting part 20 during the perforation process.
`
`[S3]
`
`A surgical drill
`
`for dental
`
`implant according to the present
`
`invention including the
`
`configuration as described above,as the integration is achieved by fastening a screw thread
`
`20
`
`between a coupling hole provided on the bottom surface of the cutting part and a coupling
`
`protrusion provided on the upper surface of the connecting part, the abrasion of the coupling
`
`protrusion due to assembling and disassembling in a repetitive replacement may be actively
`
`reduced to secure the durability and lifespan of the connecting part, and latch protrusions and
`
`12
`
`

`

`Application No: 17/284,910
`Docket No: PK3454668
`Specification: Marked-up
`
`holding protrusionsare further provided between a coupling hole and a coupling protrusion so
`
`that protection is given for decoupling due to a mutual cross-latching. The cutting part is
`
`formed by a combination ofat least one coupling part protruding downward from the bottom
`
`surface of the cutting part and a coupling hole formedin the stepped part and a fixing nutthat
`
`passes through the coupling hole and a portion of the coupling part exposed to the bottom
`
`surface of the stepped part. As the coupling force between the connecting parts is reinforced,
`
`and the precise perforation may stably performed, so that a more comfortable implant
`
`environmentis created.
`
`[54]
`
`Although the present invention has been described with reference to the embodiments shown
`
`10
`
`in the drawings, this is only illustrative, and those skilled in the art may understandthat various
`
`modifications and equivalent other embodiments are possible. The scope of the protection of
`
`the present application should be determined by reasonable interpretation of the appended
`
`claims andall technical concepts coming within the equivalence rangeof the present invention
`
`should be interpreted to be embracedin the scope of the right of the present invention.
`
`15
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`feat
`
`
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`teves,
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`13
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`