KR100893287B1 - Dental implant drill using multi-stage structure - Google Patents

Abstract

According to the present invention, the thrust load received at the outer diameter of the implant drill is increased by reducing the thrust load received at the center of the implant drill by the multi-stage having the cutting edges formed at several stages, so that the thrust load received at the center and the outer diameter of the implant drill is constant. Recessed groove to minimize temperature rise by cutting the cutting edge by minimizing the temperature and distributing cutting force to each cutting edge so that the chip can be discharged smoothly. Dentistry using the multi-stage structure to increase the initial fixation force by increasing the initial fixing force by forming a multi-stage part and the tip part to be similar to the shape of the lower part of the fixture, thereby widening the area where the lower part of the fixture contacts the bone. It relates to an implant drill.

Fixture, multi-stage, thrust load, implant drill

Description

A dental implant drill having a multi-step structure

According to the present invention, the thrust load received at the outer diameter of the implant drill is increased by reducing the thrust load received at the center of the implant drill by the multi-stage having the cutting edges formed at several stages, so that the thrust load received at the center and the outer diameter of the implant drill is constant. Recessed groove to minimize temperature rise by cutting the cutting edge by minimizing the temperature and distributing cutting force to each cutting edge so that the chip can be discharged smoothly. Dentistry using the multi-stage structure to increase the initial fixation force by increasing the initial fixing force by forming a multi-stage part and the tip part to be similar to the shape of the lower part of the fixture, thereby widening the area where the lower part of the fixture contacts the bone. It relates to an implant drill.

Implant refers to a substitute that restores human tissue when the tissue is lost, but in the dentist, artificial teeth are used, and the technique of implanting the implant in place of the damaged or damaged natural tooth of the patient is now widely used. It is becoming.

In the artificial tooth treatment, a groove is formed by drilling a alveolar bone to be artificially implanted using a drill, and the screw part of the fixture is embedded while the screw is formed in the groove when the screw is rotated while the fixture is inserted into the groove. Will be. This is done by joining the abutment to the top of the fixture secured to the alveolar bone and then applying the final prosthesis to the abutment.

1 is a block diagram of a conventional implant drill.

As shown in FIG. 1, a conventional implant drill is designed with a constant tip edge and a free end surface so that the cutting speed of the central portion and the outer diameter portion is different at a constant rotation. In addition, the thrust load is different in the central portion and the outer diameter portion of the implant drill to increase the cutting temperature, the heat received by the alveolar bone increases, there is a problem that the bone cells necrosis. Here, the thrust load refers to the force as a reaction that the drill receives in the direction opposite to the axial direction P during drilling. On the other hand, the surface of the tip is in contact with the alveolar bone is wide, the chip (chip) occurs largely to the length level of the tip edge, there is a problem that the chip is not discharged smoothly due to such a large chip to further increase the cutting temperature .

FIG. 2 is a step diagram for expanding a recessed groove step by step with conventional drills of various diameters, and FIG. 3 is a cross-sectional view illustrating a fixture embedded in the recessed groove formed by the drills of FIG. 2.

In order to minimize the heat received by the alveolar bone, which is a conventional problem, as shown in FIG. There is still a problem of increasing the cutting temperature because the load is different from the center and the outer diameter of the implant drill, the length of the drill procedure is long, and the center of the hole formed using the previous drill when using the next drill. Since it is difficult to match, there is a difficult problem in the procedure because the final buried groove can be created in a position different from the original intended. Furthermore, as shown in FIG. 3, after the fixture 7 is embedded in the recessed groove enlarged in the shape of the drill in the final stage of FIG. 2, a gap 9 is formed in the lower portion of the fixture 7 to fix the fix. The lower end portion 71 of the chew has a problem in that the initial fixing force of the implant is lowered because the contact area with the alveolar bone 6 is small.

The present invention has been made to solve the above problems, the object of the present invention, the chip (chip) is small by the multi-stage forming a cutting edge in several stages in order to minimize the heat that the alveolar bone can receive It is to provide a dental implant drill using a multi-stage structure that can be generated in a form and smoothly discharged.

It is still another object of the present invention to form a cutting edge of a drill of several steps in one drill to form a wider diameter from the lower end to the upper end of the multi-stage, and to form a hole for fixing the fixture in one drilling. It is possible to make a hole in a single drilling, and to provide a dental implant drill using a multi-stage structure that can be easily performed because there is no need to match the center of the groove.

It is still another object of the present invention to increase the thrust load received at the outer diameter of the drill so that the thrust load received at the entire drill is constant so that the tip angle of the end of the larger diameter is larger than the tip angle of the end of the smaller diameter. The clearance angle of the step is to provide a dental implant drill using a multi-stage structure to minimize the heat received by the alveolar bone by forming less than or equal to the clearance angle of the smaller diameter step.

Another object of the present invention, in order to reduce the thrust load of the center of the drill to form a diameter of the thinning to the same level as the diameter of the free end surface to ensure a constant thrust load received from the center and outer diameter of the implant drill during drilling In order to minimize the heat received by the alveolar bone, it is to provide a dental implant drill using a multi-stage structure.

Another object of the present invention is to form a cutting edge of the multi-stage according to the shape of the lower end of the fixture to be implanted, so that the area of contact with the bone at the lower end of the fixture embedded in the groove is increased to increase the initial fixing force. It is to provide a dental implant drill used.

Dental implant drill using a multi-stage structure for achieving the above object of the present invention includes the following configuration.

According to the first embodiment of the present invention, in the dental implant drill using a multi-stage structure according to the present invention, the diameter is extended in one end of the bag extending in the axial direction, and the extended in the axial direction from the other end of the extension And a multi-stage portion and a tip portion extending from one end of the multi-stage portion, wherein the extension portion further includes a groove so as to easily discharge chips of the alveolar bone discharged during the drilling operation to the outside. Chips of the alveolar bone are formed in a small form in order to minimize heat that can be received, and are formed in a plurality of stages so that the chips can be smoothly discharged through the grooves. The second free surface is formed in the direction, the cutting edge is further included on one side of the first free surface to cut the alveolar bone It features.

According to the second embodiment of the present invention, in the dental implant drill using the multi-stage structure according to the first embodiment of the present invention, the plurality of stages of the multi-stage portion is formed so that the diameter of the stage is reduced in the axial direction once It is possible to form a groove for burying the fixture by drilling of, it is characterized in that the treatment time of the implant can be shortened.

According to the third embodiment of the present invention, in the dental implant drill using the multi-stage structure according to the second embodiment of the present invention, the tip angle of the step having the larger diameter is formed larger than the tip angle of the step having the smaller diameter, The clearance angle of the large diameter stage is formed to be smaller than or equal to the clearance angle of the smaller diameter stage, thereby increasing the thrust load received at the outer diameter of the drill, so that the thrust load received from the entire drill can be made constant.

According to the fourth embodiment of the present invention, in the dental implant drill using the multi-stage structure according to the third embodiment of the present invention, the plurality of stages of the multi-stage portion, the clearance angle of the large diameter stage is the diameter It is characterized in that it is formed 1˚ ~ 5˚ smaller than the clearance angle of the small stage.

According to the fifth embodiment of the present invention, in the dental implant drill using the multi-stage structure according to the third embodiment of the present invention, the tip portion, the groove is formed so that the chip discharge of the center and the drill smoothly into the alveolar bone during drilling Further comprising a thinning to enter, the thinning, characterized in that the diameter of the thinning is formed of 80% ~ 100% of the diameter of the free end surface so as to reduce the thrust load at the center of the drill.

According to a sixth embodiment of the present invention, in the dental implant drill using the multi-stage structure according to any one of the first to fifth embodiments of the present invention, the front end and the multi-stage part of the lower end of the fixture It is formed in the same manner as the shape of the lower part of the fixture buried in the groove is characterized in that to increase the initial fixing force by widening the area in contact with the alveolar bone.

The present invention can obtain the following effects by the configuration, combination, and use relationship described above with the present embodiment.

The present invention has the effect that the chip is generated in a small form by the multi-stage portion formed by cutting edges in several stages in order to minimize the heat that the alveolar bone can receive smoothly discharged.

The present invention is formed so that the diameter from the lower end of the tip portion to the upper end of the multi-stage portion and forming a cutting edge of the drill of several steps in one drill to create a buried hole that can be buried fixture in one drilling In addition, the drilling hole can be made by one drilling, so the center of the hole does not need to coincide, so that the procedure can be easily performed.

The present invention, in order to increase the thrust load received from the outer diameter of the drill and to make the thrust load received from the entire drill constant, the tip angle of the end of the large diameter is larger than the tip angle of the end of the small diameter, and the clearance angle of the end of the large diameter Has the effect of minimizing heat received by the alveolar bone by forming the diameter smaller than or equal to the clearance angle of the small stage.

In order to reduce the thrust load at the center of the drill, the diameter of the thinning is formed at the same level as the diameter of the tip free surface, so that the thrust load received at the center and the outer diameter of the implant drill during drilling is constant. The effect of minimizing this can be obtained.

The present invention, by forming a cutting edge of the multi-stage according to the shape of the lower end of the fixture to be implanted, it is possible to increase the initial fixing force by increasing the area in contact with the bone at the lower end of the fixture embedded in the hole. .

Hereinafter, with reference to the accompanying drawings a preferred embodiment of a dental implant drill using a multi-stage structure according to the present invention will be described in detail.

Figure 4 is a block diagram of a dental implant drill using a multi-stage structure according to an embodiment of the present invention, Figure 5 is an enlarged view of a portion A of FIG.

4 to 5, the dental implant drill 100 using the multi-stage structure according to the present invention includes a shank portion 1, an extension portion 2, a multi-stage portion 3, and a tip portion 5. .

The shank portion 1 is composed of a chuck coupling portion 11 and the bag 12 to which the chuck (not shown) is coupled. The chuck coupling portion 11 includes a chuck coupling surface 111 to which the chuck is coupled and a chuck groove portion 112 formed with grooves along the circumferential direction, and the chuck not shown is a chuck coupling surface 111 and a chuck groove portion ( 112) and fixed.

The extension part 2 is enlarged and expanded at one end of the bag 12 and includes a wing 21 and a groove 22. The wing 21 is formed to extend a predetermined length in a spiral along the circumference of the extension portion is formed with a plurality of wings. The groove 22 is an alveolar bone which is formed in a predetermined shape, preferably helically, from one end of the extension portion 2 to one end of the tip portion 5, which will be described later, between the wings and discharged during drilling. The chip can be easily discharged to the outside.

The multi-stage portion 3 is formed of a plurality of stages whose diameter increases from the other end of the extension portion 2 toward the upper side. Since the plurality of stages are formed to extend from the blade 21 and are similar in structure to each one stage S in the configuration thereof, one stage S will be described. The stage S includes a first free surface S1 and a second free surface S2.

The first free surface S1 is formed to be inclined in the inward direction of the shaft 10 at the blade 21 and a cutting edge S1a capable of cutting the alveolar bone 6 on one side of the first free surface S1. ). In addition, the second free surface S2 is formed in the axial direction P at one end of the first free surface S1 and the diameter at the end S is between the pair of second free surface S2. It is defined as distance. Therefore, a chip is generated in a small shape by the cutting edge S1a formed on the first free surface S1 of each end S, and smoothly out of the recess 8 through the groove 22. Since it is discharged, it is possible to reduce the cutting temperature.

On the other hand, according to another embodiment of the present invention, the multi-stage portion 3 has a plurality of stages formed so as to reduce the diameter of each stage (S) in the axial direction (P), the chip is small by a plurality of stages Since it can be generated in the shape to minimize the generation of cutting temperature can be formed in the groove (8) for embedding the fixture (7) in one drilling, and also to form the groove (8) in one drilling Since it can be made by solving the problem of matching the center of the recess groove (8) generated when performing the procedure by using a conventional multi-stage drill can be easily performed.

7 is an exemplary view showing the tip angle of the present invention, Figure 8 is an exemplary view showing the clearance angle of the present invention. 7 and 8 illustrate a multi-stage part formed of three stages, but the multi-stage portion of the present invention is not limited to three stages.

On the other hand, according to another embodiment of the present invention, as shown in Figures 7 and 8, the multi-stage portion 3 to make the thrust load received at the center and the outer diameter of the drill 100 in order to lower the cutting temperature The tip angle α ₁ of the first end 31 is greater than the tip angle α _{2 of} the second end 32, and the tip angle α ₂ of the second end 32 is the third end 33. of the tip angle (α ₃₎ than, and so greatly form the first stage (31) relief angle (β ₁₎ smaller than the clearance angle (β ₂₎ of the second end 32, second end 32 of the The allowable angle β ₂ is made smaller than the allowable angle β ₃ of the third end 33.

The tip angle at the end S refers to an angle formed with the shaft 10 when the first free plane S1 is projected in parallel, and the magnitude of the tip angle is proportional to the thrust load.

The clearance angle at the end S refers to an angle formed with the horizontal plane when the first clearance surface S1 is projected in parallel, and the clearance angle is a clearance factor that determines the friction between the alveolar bone and the cutting edge. If this is large, there is a high possibility of chipping due to lack of edge strength, and vibration occurs in the initial positioning process for forming the recessed groove 8, and thus triangular or pentagonal irregularities are generated, or vibration is greatly caused up and down. The cutting effect is lost, and if the clearance angle is small, the clearance surface contacts the alveolar bone and the cutting temperature is increased.

The magnitude of the tip angle is proportional to the thrust load, the magnitude of the clearance angle is inversely proportional to the thrust load, and the diameter at each end is inversely proportional to the thrust load. If this is expressed as an expression, it is as follows.

T = C ₁ * α / (β * D)

(T is the trust load, C ₁ is the proportional constant, α is the tip angle at the stage, β is the clearance angle at the stage, D is the diameter at the stage)

Therefore, referring to Equation 1, since the diameter D1 of the first end 31 is larger than the diameter D2 of the second end 32, the tip angle α ₁ of the first end 31 is increased. the front end of the second stage 32, tip angle (α ₂₎ greater than, the front end of the second stage 32, each of (α ₂₎ the third stage 33 of the so formed larger than the angle (α _3), The clearance angle β ₁ of the first stage 31 is smaller than the clearance angle β _{2 of} the second stage 32, and the clearance angle β ₂ of the second stage 32 is the third stage 33. Each end S is formed at a cutting edge S1a so as to increase the thrust load received at the outer diameter of the drill 100 by making it smaller than the clearance angle β ₃ , so that the thrust load received by the entire drill 100 is constant. It is preferable to form to have. In addition, the present invention is to reduce the variable for manufacturing a dental implant drill using a multi-stage structure to equal the clearance angle of each step and to increase the thrust load received from the outer diameter of the drill by the variable by the tip angle, or This does not preclude equalizing the tip angle of the step and increasing the thrust load received at the outer diameter of the drill by the variable of the clearance angle.

On the other hand, according to another embodiment of the present invention, the multi-stage portion 3 has a clearance angle β ₁ of the first end 31 to increase the thrust load received at the outer diameter of the drill 100, the second end 32 ) relief angle (β ₂ smaller) than, the angle (β ₂ free of the second stage 32) is the third stage (angle than the relief angle (β ₃₎ of 33), preferably of 1˚ ~ 5˚ It is suitable to form. This is due to the cutting speed, where the cutting speed is inversely proportional to the thrust load, the cutting speed is proportional to the diameter at the end and proportional to the rpm for one minute. If this is expressed as an expression, it is as follows.

T = C ₂ / V

V = π * D * N / 1000

(T is the trust load, C ₂ is the proportional constant, V is the cutting speed, D is the diameter of the stage, N is rpm)

Therefore, referring to Equation 1 and Equation 2, the rpm is fixed to 1000 ~ 1500, the diameter of the dental implant drill 100 is less than 6mm, the cutting speed is increased if the diameter of the step (S) is large As a result, the thrust load at the outer diameter of the drill 100 is reduced. Therefore, by increasing the thrust load of the large diameter (S) to make the thrust load at the center and the outer diameter of the entire drill 100 constant, the clearance angle of the first end 31 to minimize the cutting temperature ( β ₁ is greater than the clearance angle β ₂ of the second end 32, and the clearance angle β _{2 of} the second end 32 is ₁ ° to the clearance angle β ₃ of the third end 33. It is preferable to form small 5 degrees.

On the other hand, the equation for designing the shape for the uniformity of the thrust load distribution in the dental implant drill using a multi-stage structure can be expressed by the following equation (1) and (2).

T = C * α / (β * D * V)

(T is the thrust load, C is the proportional constant for the specific cutting resistance per unit area, α is the tip angle at the end, β is the clearance angle at the end, D is the diameter at the end, V is the cutting speed)

Figure 6 is a bottom view of a dental implant drill using a multi-stage structure according to an embodiment of the present invention.

4 to 6, the tip portion 5 extends from one end of the multi-stage portion 4, and includes a tip clearance surface 51 and a thinning 52.

The tip free surface 51 is formed at an end formed at the lower end of the multi-stage part 3 to be inclined in the inward direction of the shaft, and is formed on the one end edge 511 for cutting the alveolar bone, the tip part 5 A plurality of tip free surfaces 51 formed in the projection are projected in parallel to form a tip angle α _{4 of} each of the front end portions of each of the leading free surfaces 51. Since the tip angle α ₄ of the tip portion is proportional to the thrust load, the tip angle α ₄ of the tip portion is made small so that the thrust load at the center of the drill 100 is reduced so that the tip diameter α ₄ is reduced. It is desirable to form the same as the load of the thrust load to minimize the cutting temperature.

The thinning 52 has a groove formed at one side of the tip blade 511 to allow the chip discharge and the drill 100 to smoothly enter the alveolar bone 6 when drilling.

On the other hand, as the diameter D5 of the thinning 52 is smaller than the diameter D4 of the tip free surface 51, the thrust load at the center of the drill is higher than the thrust load at the outer diameter of the drill, so that the cutting temperature is increased. , The thinning 52 is preferably formed with a diameter (D5) of the thinning (52) to 80% ~ 100% of the diameter (D4) of the free end surface 51 in order to reduce the thrust load of the center of the drill Do. Therefore, in the present invention, the diameter (D5) of the thinning 52 of the conventional implant drill is formed to be less than 50% of the diameter (D4) of the tip marginal surface 51 of the drill so that the thrust load of the center of the drill It is possible to solve the problem that the cutting temperature is increased due to the inequality of the thrust load higher than the thrust load at the outer diameter.

According to another embodiment of the present invention, the tip portion 5 and the multi-stage portion 3 is formed in a shape similar to the shape of the lower end 71 of the fixture 7 to be embedded in the recess 8 The lower end part 71 of (7) can widen the area which contacts the alveolar bone 6, and can raise an initial fixation force. In the conventional drill, as shown in FIG. 3, a gap 9 is formed in which the lower end 71 of the fixture 7 does not come into contact with the alveolar bone, resulting in a reduction in the contact area between the fixture 7 and the bone tissue, thereby reducing the fixing force. Although there is a problem of lowering, when the outer periphery profile of the front end portion 5 and the multi-stage portion 3 is formed to be substantially similar to the shape of the lower end 71 of the fixture 7 as in the embodiment of the present invention, the recess 8 The lower end of the shape and the lower end 71 of the fixture 7 approximately coincide with each other so that the bone contact area can be widened, thereby improving the fixing force.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the state of use of the dental implant drill using a multi-stage structure according to the present invention.

9 is an illustration before the fixture is implanted in the groove groove formed by the dental implant drill using a multi-stage structure, Figure 10 is an illustration after the fixture is implanted in the groove groove formed by the dental implant drill using a multi-stage structure. It is also.

4, 9 and 10, the operator rotates the drill mounted on the chuck to form a groove in the alveolar bone of the patient, passes through the patient's gums, contacts the drill to the alveolar bone, and presses the tip of the drill. By cutting grooves in the alveolar bone and cutting the alveolar bone intermittently by the cutting edges included in the plurality of stages, the cutting temperature can be minimized and the thrust load can be kept constant at the center and outer diameter of the drill. The cutting temperature can be further minimized, and the chips of the cut alveolar bone are generated in a small form and can be easily discharged to the outside through the thinning and grooves, so that the cutting temperature can be further lowered to minimize the influence on the heat that the alveolar bone can receive. You can do it.

In addition, the shape of the multi-stage part and the tip of the implant drill according to the present invention is formed similarly to the shape of the lower end of the fixture to be implanted to remove the implant drill according to the present invention from the recessed groove formed by the drilling operation and to fix the fixture to the recessed groove. By fasting, the area where the lower end of the fixture contacts the alveolar bone can be widened, thereby increasing the initial fixation force.

In the above, the Applicant has described various embodiments of the present invention, but these embodiments are merely one embodiment for implementing the technical idea of the present invention, and any changes or modifications may be made to the present invention as long as the technical idea of the present invention is implemented. It should be interpreted as falling within the scope of.

1 is a configuration diagram of a conventional implant drill

Figure 2 is a step for expanding the recess groove step by step with a conventional drill of various diameters

3 is a cross-sectional view illustrating a fixture embedded in a recess formed by the drills of FIG. 2.

Figure 4 is a block diagram of a dental implant drill using a multi-stage structure according to an embodiment of the present invention

5 is an enlarged view of a portion A of FIG.

Figure 6 is a bottom view of a dental implant drill using a multi-stage structure according to an embodiment of the present invention.

7 is an exemplary view showing the tip angle of the present invention.

8 is an exemplary view showing a clearance angle of the present invention

Figure 9 is an exemplary view before the fixture is embedded in the groove groove formed by the dental implant drill using a multi-stage structure

10 is an exemplary view after the fixture is implanted in the groove formed by the dental implant drill using a multi-stage structure

* Description of the symbols for the main parts of the drawings *

1: Shank part 2: Extension part 3: Multi-stage part 5: Tip part

6: Alveolar bone 7: Fixture 8: Fed-out groove 9: Gap 10: Axis

11: chuck coupling part 12: bag 21: wing 22: groove 51: tip margin

52: thinning 100: dental implant drill using a multi-stage structure

111: chuck coupling surface 112: chuck groove portion 511: tip blade

S: where S1: first free surface S2: second free surface S1a: cutting edge

Claims (6)

An extension portion enlarged in one end of the bag and extending in the axial direction, A multistage portion extending in the axial direction from the other end of the extension portion; A tip portion extending from one end of the multi-stage portion, The extension portion, It further comprises a groove to easily discharge the chip of the alveolar bone discharged during the drilling operation to the outside, The multi-stage part, In order to minimize the heat that the alveolar bone can receive the chip of the alveolar bone is formed in a plurality of stages to be discharged smoothly through the groove, Each end has a first free surface in an inward direction of the shaft and a second free surface in the axial direction, and a cutting edge is further included on one side of the first free surface to cut the alveolar bone. Dental implant drill using multi-stage structure The method of claim 1, wherein the plurality of stages of the multistage portion, The diameter of the stage is reduced in the axial direction to form a groove for burying the fixture with a single drilling, and the implantation time of the implant is increased compared to the step of expanding the groove for each stage with an implant drill of various diameters. Dental implant drill using a multi-stage structure, characterized in that can be shortened The method of claim 2, wherein the plurality of stages of the multistage portion, The tip angle of the large diameter stage is formed larger than the tip angle of the small diameter stage, and the clearance angle of the large diameter stage is smaller than or equal to the clearance angle of the small diameter stage to increase the thrust load received from the outer diameter of the drill. Dental implant drill using a multi-stage structure, characterized in that the thrust load received from the entire drill can be made constant The method of claim 3, wherein the plurality of stages of the multi-stage portion, Dental implant drill using a multi-stage structure, characterized in that the clearance angle of the large diameter stage is formed 1˚ ~ 5˚ smaller than the clearance angle of the small diameter stage. The method of claim 3, wherein the tip portion, An end free surface extending from the lower end of the multi-stage part is formed to be inclined in the inward direction of the shaft, and a groove is formed on one side of the end free surface, and further includes a thinning to allow the chip discharge and the drill to smoothly enter the alveolar bone during drilling. , Said thinning, In order to reduce the thrust load at the center of the drill, the diameter of the thinning is a dental implant drill using a multi-stage structure, characterized in that formed from 80% to 100% of the diameter of the free end surface The method according to any one of claims 1 to 5, The front end portion and the multi-stage part are formed in the same shape as the lower end portion of the fixture so that the lower end portion of the fixture embedded in the recess groove widens the area in contact with the alveolar bone so as to increase the initial fixing force. Implant Drills

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