KR102270227B1 - Low-speed rotary trephine tap drill for implant treatment - Google Patents

Abstract

The present invention relates to a low-speed rotary trephine tap drill for implant treatment, which can cut the hard alveolar bone in a spiral at once with a low-speed rotary tap drill during an alveolar bone drilling process for implant placement. To this end, the low-speed rotary trephine tap drill for implant treatment is formed to mobile terminal an upper shaft of a main body on a dental handpiece. The tap drill has one or a plurality of incision grooves formed on the circumferential surface of the main body to communicate with an inner space part of the inner central portion and a thread having a helical cutting edge is formed on the circumferential surface of the main body.

Description

Low-speed rotary trephine tap drill for implant treatment

The present invention relates to a low-speed rotational trepin tap drill for implant surgery. Above all, in the process of drilling alveolar bone for implant placement, the hard alveolar bone can be spirally cut by the low-speed rotational treppin tap drill at once. It relates to a low-speed rotational trepin tap drill for implant surgery.

In general, a dental implant is a treatment that restores a lost tooth to an artificial tooth by using an osseointegration phenomenon in which an implant material, which is harmless to the human body, adheres well to the human jaw bone. It consists of a fixture (F: Fixture) that is implanted in the alveolar bone to act as an artificial tooth root, an abutment screw-coupled to the artificial tooth root, and an upper prosthesis (Crown) that is joined to the abutment and serves as an artificial tooth. For implant operation, first, a hole is drilled in the alveolar bone (B) with a dental handpiece, and then the fixture is etched. Looking at the drilling process of the alveolar bone for this purpose, if a hole is drilled in the bone with a large drill at a time, the risk of damage or overload to the bone is high, so as illustrated in FIG. 1 , the drill hole (Drill) through a multi-step drilling process hole) is drilled. In (a), a guide hole (2) is first drilled in the alveolar bone (B) with an initial drill (1) with a diameter of about 2mm or less, and then in (b)~(d), the diameter is 2.75mm~4mm By selectively using a drill of precision, the drill hole is gradually expanded step by step. Then, as in (e), the fixture (F) is etched into the drill hole. As such, in the past, due to the drilling process several times, it causes heat and overload in the alveolar bone, the bone tissue is damaged or the osseointegration function is lost, and suffers from severe pain and sequelae, or the recovery is delayed. It caused serious problems. In addition, a large amount of force and labor was added for a doctor to hold and treat a handpiece that rotates at high speed (about 500 to 5000 RPM or more) for a long time, and there was a problem in that fatigue due to long-term treatment was aggravated and the quality of the implant was poor.

Looking at the prior art (patent literature) related to the above-mentioned prior art (patent document) related to the drill for implant surgery, (Patent Document 0001) Korean Patent Publication No. 10-2012-0107796 (published on October 04, 2012) 'For implant operation Drill' has been known. This is a structure in which the drill part is located under the drill connection part, the drill connection part consists of an upper drill part, a drill fixing groove, and a drill connection body, and the drill part has a space part, a side penetration part, and a plurality of side surfaces It consists of a bone preparation blade and a lower bone preparation blade at the lower end. In addition (Patent Document 0002), 'drill for dental implants' and the like of Korean Patent Publication No. 10-2019-0123096 (published on October 31, 2019) are known. This includes a coupling portion connected to the handpiece, a body portion disposed under the coupling portion, a plurality of cutting blades disposed under the body portion, a cutting portion having a void section, and cutting of the alveolar bone In this case, a passage for supplying cooling water to the void portion is configured. However, in the above (Patent Document 0001, 0002), excessive frictional heat and overload are generated while the lateral bone preparation blade of the drill rubs against the hard bone during the drilling process of the alveolar bone, thereby causing damage or injury around the hole and adjacent It is expected that irritation (pain) occurs in the teeth and gums, the risk of bacterial infection is very high, and the problem of seriously inhibiting the osseointegration with the fixture is expected.

Domestic Patent Publication No. 10-2012-0107796 (published on October 04, 2012), Title: Drill for implant surgery Domestic Patent Publication No. 10-2019-0123096 (published on October 31, 2019), Title: Drill for dental implants

An object of the present invention is to drill the alveolar bone for implant operation and drill the alveolar bone to implant an artificial root (Fixture), a Trephine tap drill having a spiral-shaped cutting edge (low speed) While the tap hole can be drilled at a time while rotating at low speed in the spiral direction (when mounted on the type handpiece), excellent stability and productivity are provided, and the implant quality is improved by maximizing the osseointegration action of the fixture. It is to provide a low-speed rotational trepin tap drill for implant surgery that can be

Another object of the present invention is that it is possible to naturally cut and tap the alveolar bone through a linear motion according to the helical rotational motion of the tap drill, so that the user (dentist) does not use a large force to cut a hard bone and even with a small force. An object of the present invention is to provide a low-speed rotating trepin tap drill for implant surgery that can easily and stably drill a tapped hole.

Another object of the present invention is to collect bone by the lower cutting function of the Treffin tap drill, to collect autogenous bone of a certain quality by the cutting edge, and to bury the fixture around the fixture using autogenous bone The goal is to provide a low-speed rotating trepin tap drill for implant surgery that has excellent osseointegration and can improve implant quality and reliability through the reconstruction of lost bones.

In order to achieve the above object, the present invention provides a low-speed rotational trepin tap drill for implant surgery in which the upper shaft part of the body part can be mounted on a dental handpiece, wherein the tap drill has one or more on the peripheral surface of the body part. a plurality of cut-out grooves are formed to communicate with the inner central space that is opened downward in the direction of the center line of the body portion, the body portion is formed with a thread having a helical cutting edge on the circumferential surface; The body portion is formed in a tapered circumference whose diameter decreases from the middle portion to the bottom; The body portion includes an excavation groove having a '∨'-shaped excavation angle at the lower end of the tapered part so that the diameter is reduced as it goes down and an excavation part having one or a plurality of second cutting edges, the body part having the incision groove It is formed in a spiral and proposes a low-speed rotational trepin tap drill for implant surgery, characterized in that the side cut surface of the incision groove is formed in a curved shape.

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According to the present invention, the screw thread is characterized in that the cutting allowance angle is formed from the front cutting edge to the rear edge.

The present invention enables drilling of the alveolar bone in a single step without applying a large force while cutting the alveolar bone along the spiral direction while the Trepin tap drill rotates at a low speed and at the same time slowly digging into the bone. The process is significantly simplified and the implant operation period is shortened, thereby improving productivity. In addition, the quality of the implant is improved by minimizing damage to the affected part (bone) due to cutting and extraction of alveolar bone, improving bone density, etc., and maximizing the osseointegration effect, and it is possible to accelerate the recovery period by preventing irritation and aftereffects caused by the procedure. In other words, since the tap hole can be drilled at once by applying the low-speed rotating handpiece, it is possible to reduce the damage caused by frictional heat between the drill and the bone caused by the drilling method performed several times with the existing high-speed dental handpiece. It is possible to minimize damage and solve problems such as deterioration of the affected area and deterioration of implant quality. In addition, there is no concern about noise generation, and the high-speed rotation noise of the handpiece relieves the patient's feeling of rejection or anxiety and greatly helps the patient's psychological stability.

The present invention is a trepin tap drilling that rotates in the circumferential direction by the spiral cutting edge of the trepin tap drill and gradually digs into the bone in the straight direction, providing excellent precision, guaranteeing reliability of cutting, and constant quality. It has the effect that autogenous bone collection of In addition, when implanting a fixture, the osseointegration effect of bone reconstruction around the fixture using autogenous bone becomes smooth, improving the quality of the implant, and it is very economical as it can reduce the purchase cost of expensive bone graft materials.

According to the present invention, the lower middle part of the body is formed with a taper, and the tap hole gradually expands along the taper-shaped thread (cutting edge) so that it can enter more smoothly into the alveolar bone, and the hole is drilled at a time. There is an advantage in that the tapered type fixture can be implanted as it is in the taper type tap hole. In addition, the present invention has the advantage of being able to smoothly enter the tap hole by guiding the tip of the treffin tap drill while cutting and expanding the guide hole by the second cutting edge formed in the excavation part of the body part.

According to the present invention, since the incision groove of the body part is in a spiral shape, the cutting edge does not contact the cutting surface at once, but naturally contacts and cuts with the alveolar bone along the spiral rotation direction, so cutting resistance is reduced as well as overload is prevented and tapped hole ( Tap hole processing performance is improved.

The present invention prevents contact resistance between the cutting surface of the bone cut by the cutting edge and the thread (surface) while the trepin tap drill rotates by forming a cutting clearance angle from the front cutting edge where the screw thread rotates to the rear edge of the blade, and alveolar bone machinability is significantly improved, frictional resistance is minimized, and it has the effect of preventing temperature rise and heat generation in and around the tap hole. In addition, after drilling the tap hole in the alveolar bone, the tap drill is reversely rotated to reduce the resistance when separating from the tap hole, thereby minimizing irritation and improving safety.

1 is a view illustrating a multi-step drilling process for drilling a drill hole (Drill hole) in the alveolar bone according to the prior art.
Figure 2 is a perspective view showing a low-speed rotation type Treffin tap drill 100 for implant surgery according to a first embodiment of the present invention.
Figure 3 is a front view showing the low-speed rotation type Treffin tap drill 100 for implant treatment of the present invention in a longitudinal section.
4 is a plan view taken along the line "A" - "A" of FIG. 3 .
5 is a bottom view of the tap drill 100 .
6 is a cross-sectional plan view of a low-speed rotational trepin tap drill for implant surgery according to a second embodiment of the present invention. ("A"-"A" line cross section)
7 is a state diagram of the use of a low-speed rotation type Treffin tap drill for implant surgery according to the present invention.

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

In the present invention according to the drawings, in the low-speed rotational trepin tap drill 100 for implant surgery in which the upper shaft part 30 of the body part 10 can be mounted on a dental handpiece, the tap drill ( 100) communicates with the inner central space 18 in which one or a plurality of incision grooves 12 formed on the circumferential surface of the body 10 are opened downward in the center line C direction of the body 10. a thread 14 having a helical cutting edge 16 on a circumferential surface of the body portion 10; The body portion 10 is formed with a taper 20 whose circumferential surface is reduced in diameter from the middle to the bottom; The body portion 10 has an excavation groove 26 and a second cutting edge 24 having a '∨'-shaped excavation angle D at the lower end of the tapered portion 20 so that the diameter decreases toward the bottom. One or a plurality of excavated parts 22 are included, and the body part 10 has the cut-out groove 12 spirally formed, and the side cut surface 13 of the cut-out groove 12 is curved. characterized in that

The low-speed rotational trepin tap drill 100 for implant surgery of the present invention having the above characteristics is mounted on the dental handpiece with the handle 30 formed on the upper portion of the body 10 to rotate at a low speed while rotating the alveolar bone. It becomes possible to drill a tap hole in (B).

2 is a perspective view showing a low-speed rotation type Treffin tap drill for implant surgery according to a first preferred embodiment of the present invention, and FIG. 3 is a front view showing the low-speed rotation type Treffin tap drill for implant operation of the present invention in a longitudinal section. . And FIG. 4 is a plan view taken along line "A" - "A" of FIG. 3 , and FIG. 5 is a bottom view of the tap drill 100 .

Referring to the above drawings, the body portion 10 is formed to extend downward to a certain length, and a thread 14 having one or a plurality of incision grooves 12 and a cutting edge 16 is formed on the circumferential surface, and the inner A space 18 is formed in the center. The incision groove 12 is formed to extend long in the longitudinal direction of the center line C in the inner center of the body 10, and a cutting edge 16 is formed in the form of a thread 14 on one side of the rotation direction. The thread 14 is such that the body portion 10 is formed in a spiral direction on the circumferential surface and divided by the incision groove 12 so that the spiral cutting edge 16 formed in the rotational direction can spirally cut the alveolar bone (B). do. The space 18 is opened laterally through the incision groove 12 of the body portion 10, is formed in the inner center, is opened downward in a straight line of the center line (C), and the cut autogenous bone (B') is the incision groove (12) ) is entered through Referring to FIG. 4 , the tap drill 100 rotates clockwise and the alveolar bone B is cut in a spiral form by the cutting edge 16 formed at the tip of the left thread 14 of the incision groove 12 . At this time, the cut autogenous bone (B ') can be recovered by being contained in the inner space (18) through the incision groove (12). The space 18 can be configured in a form in which the lower part is opened downward or blocked as shown in the figure. On the other hand, the screw thread 14 has a cross section as shown in the drawing, preferably a triangular or trapezoidal shape, or can be formed in various shapes such as a square, polygonal, arc (⊂) shape, etc., thereby improving the corrosion resistance of the fixture and fixing power. can be increased to prevent loosening.

The body portion 10 is formed with a taper 20 in which the inner space portion 18 is opened downward and the diameter of the inner space portion 18 is reduced as the circumferential surface goes down. The body portion 10 is formed with a taper 20 whose circumferential surface is reduced in diameter from the middle portion to the bottom so that it can enter smoothly while gradually expanding the tap hole along the guide hole 2, and when cutting bone It prevents overload and minimizes irritation of the affected area.

An excavation part 22 having one or a plurality of excavation grooves 26 and a second cutting edge 24 is formed at the lower end of the body 10 . The excavation part 22 is formed in a conical shape whose diameter is reduced as it goes down, and the tap drill 100 can enter while excavating along the guide hole 2 . And in the excavation part 22, one or a plurality of excavation grooves 26 are formed at equal intervals, open downward in a concave '∩' shape, and on either side (outside) of the excavation groove 26, a second cutting edge ( 24) is formed. The excavation part 22 has a sharp edge, and the second cutting edge 24 is continuously formed on the outer side of the excavation groove 26, so it is easy to dig into the hard bone, and it is also with the cutting edge 16 of the taper 20. It is configured to minimize cutting resistance and smoothly enter the guide hole (2). In addition, the excavation part 22 has a '∨'-shaped excavation angle (D) that decreases in diameter as it goes down, and the excavation angle (D) is formed within the range of 15 to 60 degrees, so that it can be naturally excavated with the guide hole (2). will do Preferably, the second cutting edge 24 can excavate and cut the bone while rotating in the rotational direction (clockwise), and the cut autogenous bone B ′ is introduced into the space 18 .

As such, in the present invention, the narrow guide hole 2 is gradually expanded by the excavation part 22 and the second cutting edge 24 to secure the access road, and the body part 10 is gradually expanded along the taper 20 . As it enters, it is possible to naturally form a tap hole by the cutting edge 16 of the screw thread 14 without unreasonableness. In other words, since the body portion 10 moves in a straight line by the helical rotational motion of the screw thread 14, the tap drill 100 itself digs into the alveolar bone (B) while holding the handpiece comfortably so as not to be shaken. It becomes possible to drill a tapped hole in one step.

The body portion 10 has a cut-out groove 12 formed in a spiral shape. In the tap drill 100 of the present invention, the incision groove 12 is twisted in the spiral direction, so that the cutting edges 16 do not come into contact with the cutting surface at once and sequentially along the obliquely inclined cutting edge 16 . Naturally, contact and cutting are made with the alveolar bone (B). As a result, the cutting resistance force acting on each cutting edge 16 is relatively reduced and overload can be prevented. For this purpose, the torsion angle of the incision groove 12 is formed within the range of 5 to 30 degrees, and preferably, it is most suitable to be formed within the range of 10 to 20 degrees.

The body portion 10 has a side cut surface 13 of the incision groove 12 is formed in a curved shape. 2 and 4, the cutting surface 13 formed on one side of the incision groove 12 is formed in a gentle curve from the cutting edge 16 toward the inner center. This is because, in the process of the cutting edge 16 cutting the autogenous bone (B), the cut autogenous bone (B') is smoothly separated along the cutting surface 13, and the cutting resistance of the cutting edge 16 is reduced and the machinability is further improved. The improved and cut autogenous bone (B ') is naturally gathered in the space (18). On the other hand, the incision groove 12 is formed symmetrically with both sides of a curved shape similar to the cutting surface 13, so that a sufficient space can be secured so that the cut autogenous bone B' does not interfere with cutting, and the inner space 18 ) is smoothly gathered.

[Second embodiment]

6 is a plan view showing a cross-section of a low-speed rotation type Treffin tap drill for implant surgery according to a second embodiment of the present invention. ("A"-"A" line cross section)

According to the present invention, the thread 14 is characterized in that the cutting allowance angle (S) is formed from the front cutting edge 16 to the rear edge 17. Referring to FIG. 6 , in the tap trill 100 , the cutting allowance angle S of the thread 14 is formed as an interior angle with respect to the tangent R of the circumference of the body 10 . The cutting allowance angle S is preferably formed within the range of 1 to 15 degrees from the front cutting edge 16 of the thread 14 toward the rear edge 17 of the thread 14, and is formed in a straight line or a gentle curve. Accordingly, when cutting the alveolar bone (B), the contact between the cutting surface of the alveolar bone (B) cut by the cutting edge 16 and the surface of the thread 14 is prevented, thereby preventing frictional heat due to contact resistance and temperature rise and heat generation of the tap hole. Of course, the machinability of the alveolar bone (B) is improved. In addition, after cutting the alveolar bone (B), the tap drill 100 is rotated in reverse to minimize the resistance (stimulus) even when separating from the tap hole and can be safely separated. The cutting allowance angle (S) is formed so that the angle increases from the cutting edge 16 to the edge 17, as shown in the figure, so that the surface of the thread is sufficiently spaced from the cutting surface.

The low-speed rotational trepin tap drill for implant surgery of the present invention configured in the above embodiment will be understood in more detail with the description of the following use state.

7 is a state diagram of the use of a low-speed rotation type Treffin tap drill for implant surgery according to the present invention. The low-speed rotational trepin tap drill 100 for implant surgery of the present invention as described above is first, drilling the primary guide hole 2 with the initial drill 1 in the alveolar bone (B) in FIG. 7 (a). Then, as in (b) and (c), the tap drill 100 of the present invention is drilled at a time at a low speed of 50 RPM or less while rotating forward while mounted on the low-speed handpiece. On the other hand, the rotation speed of the tap drill 100 is preferably within the range of about 20 ~ 100RPM in consideration of the state of the alveolar bone, bone density, and the like. Thereafter, the tap drill 100 may be reversely rotated to be separated from the tap hole. Next, since it is possible to implant the fixture (F) directly into the tap hole, the drilling process of the alveolar bone, which was previously divided into several times, is significantly simplified and the implant operation period can be shortened.

In addition, although not shown as a separate embodiment of the present invention, the present invention is the body portion 10 so that the autogenous bone (B ') inside the recovered space 18 after drilling with the tap drill 100 can be easily withdrawn. It can be configured to be able to separate or fix the and the bag part 30 . This allows the upper surface of the space 18 that was blocked by separating the bag 30 from the body 10 to be opened upward, and the autogenous bone B' stored in the space 18 can be easily pulled up by pushing up from the bottom. there will be

1: Initial drill 2: Guide hole 10: Body
12: incision groove 13: cutting surface 14: thread
16: cutting edge 17: cutting edge 18: space part
20: taper 22: excavation part 24: second cutting edge
26: excavation groove 30: handle 100: tap drill
B: alveolar bone B': autogenous bone C: midline
D: Excavation angle F: Fixture R: Tangent
S: Cutting clearance angle

Claims (6)

In the low-speed rotational trepin tap drill 100 for implant surgery in which the upper shaft part 30 of the body part 10 can be mounted on a dental handpiece,
The tap drill 100 is an inner center space portion in which one or a plurality of incision grooves 12 formed on the circumferential surface of the body portion 10 are opened downward in the direction of the center line C of the body portion 10 ( 18) is formed to communicate with,
The body portion 10 is formed with a thread 14 having a helical cutting edge 16 on the circumferential surface;
The body portion 10 is formed with a taper 20 whose circumferential surface is reduced in diameter from the middle to the bottom;
The body portion 10 has an excavation groove 26 and a second cutting edge 24 having a '∨'-shaped excavation angle D at the lower end of the taper 20 so that the diameter is reduced as it goes down. Or including a plurality of excavated parts 22 formed,
In the body portion 10, the incision groove 12 is spirally formed, and the side cutting surface 13 of the incision groove 12 is formed in a curved shape. .
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The screw thread 14 is a low-speed rotating trepin tap drill for implant surgery, characterized in that the cutting clearance angle (S) is formed from the front cutting edge 16 to the rear edge 17.

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