JP6187862B2 - Dental implant drilling system - Google Patents

Description

  The present invention relates to a drilling system for dental implants (see FIG. 15), and more specifically, hard cortical bone can be cut as planned during implant surgery, and then a precise embedding cavity is formed by one drilling. Belongs to the technical field of drilling systems.

  Conventionally, in a general implant drilling system, in order to form an appropriate embedding cavity for implanting an implant body (fixture), drills with different diameters, that is, drills with a small diameter are sequentially increased. The drill is changed many times. For example, in the case of conventional drills, in order to form an embedding cavity with φ = 6 mm, a total of nine drill changes are necessary. Then, every time each drill is replaced and used, a careful confirmation of the embedding depth is required (see, for example, FIG. 3 of JP-A-2004-113488).

  In addition, in order to form an embedding cavity for conventional implant surgery, drilling is performed by rotating a drill at a high speed, and heat is generated, so that water injection is performed.

Japanese Patent Laid-Open No. 2004-113488 (FIG. 3)

  In the conventional general drilling system, the drill must be changed many times to form the embedding cavity, and it is necessary to carefully check the embedding depth each time, which is a mental stress for the operator. There are problems.

  Further, as shown in FIG. 16, when drilling is performed at low speed using the conventional drill z, initially drilling is performed straight from a hard cortical bone C to a soft cancellous bone D in a desired direction as shown in FIG. 16A. However, there is a drawback that the direction of the embedding inevitably moves in the process of exchanging the drill as shown in FIG. 16B.

  Furthermore, in conventional drilling under high-speed rotation with water injection, there is a problem in that the bone tissue is adversely affected by heat generation, and a healing promoting substance necessary for the living body is washed away by water injection. .

  Therefore, the object of the present invention is to cut only the cortical bone at the time of implant surgery, and then accurately form an appropriate embedding cavity by one drilling by low-speed rotation under non-injection water, To provide a high-quality dental implant drilling system capable of reliably implanting an implant body at a desired position while reducing the burden on the patient.

As a means for solving the problems, the dental implant drilling system according to claim 1 is a dental implant drilling system for cutting hard cortical bone C during implant surgery,
The countersink drill A is composed of a contra-shaft part 1, a body part 3, a cortical bone cutting blade part 5 and a guide part 7. The rod-like contra-shaft part 1 has a connection part 1a at the upper end i and a lower part j A cortical bone cutting blade portion 5 having a blade portion 6 capable of cutting hard cortical bone C is formed at a predetermined height H at the lower end k of the torso portion 3, and the cortex is formed. A guide portion 7 is formed in a lower portion m of the bone cutting blade portion 5, and the cortical bone C having a predetermined depth H can be cut from the bone crest F by 50 rotations per minute of the cortical bone cutting blade portion 5. And

The dental implant drilling system according to claim 2, wherein the dental implant drilling system forms the embedding cavity S by one drilling after cutting the hard cortical bone C during the implant operation,
Consists of a drill B with a stopper comprising a contra-shaft portion 18, a body portion 17, a drill portion 9, and a stopper 10. The rod-shaped contra-shaft portion 18 has a connecting portion 8 a at the upper end and a body portion 17 formed below. The drill portion 9 is formed at a lower end of the body portion 17 and at least a portion corresponding to the depth of the embedding cavity S, and a convex locking portion 19 is provided on the body portion 17 above the drill portion 9. The stopper 10 is formed in a cylindrical shape having a plurality of notches 11... That are notched according to several levels of depth, and the stopper 10 is the convex locking portion of the notch 11. It is attached so as to be adjustable in height by being locked to 19, and a desired embedding cavity S can be formed by cutting the cortical bone C or the cancellous bone D by 50 rotations of the drill portion 9 per minute. And

The dental implant drilling system according to claim 3 is a dental implant drilling system in which the hard cortical bone C is cut during the implant operation and the embedding cavity S is formed by one drilling,
a) Countersink drill A composed of the contra-shaft 1, the body 3, the cortical bone cutting blade 5 and the guide 7, and a stopper composed of the contra-shaft 18, the trunk 17, the drill 9 and the stopper 10. Consists of drill B,
b) In the countersink drill A, the rod-shaped contra-shaft portion 1 is provided with a connecting portion 1a at an upper end i and a body portion 3 is formed at a lower portion j, and a hard cortex is formed at a lower end k of the body portion 3. A cortical bone cutting blade portion 5 having a blade portion 6 capable of cutting bone C is formed at a predetermined height H, and a guide portion 7 is formed at a lower portion m of the cortical bone cutting blade portion 5. The cortical bone C having a predetermined depth H is cut from the bone crest F by 50 rotations of the cutting blade 5 per minute, so that a flat bone surface y can be formed at the position x of the platform 20 of the implant body 2;
c) In the drill B with a stopper, a drill portion 9 formed at least at a portion corresponding to the depth of the embedding cavity S is formed at the tip of the contra-shaft portion 18 and at the top of the drill portion 9. A cylindrical stopper 10 having a plurality of cutout portions 11... Provided with a lock portion 17 and having depths of several levels is adjusted by locking the cutout portion 11 to the lock portion 19. The cortical bone C or cancellous bone D is cut by rotating the drill portion 9 50 times per minute until the stopper 10 comes into contact with the flat bone surface y formed by the countersink drill A. The desired embedding cavity S can be formed freely.

In a dental implant drilling system according to a fourth aspect of the present invention, the cortical bone cutting blade portion 5 of the countersink drill A is configured to be capable of cutting the cortical bone C at 50 revolutions per minute under non-injected water. Features.

A drilling system for a dental implant according to a fifth aspect of the invention is characterized in that the drilled drill B is configured to be able to form the embedding cavity S at 50 revolutions per minute under non-injected water.

In the dental implant drilling system of the present invention (Claim 1), a cortical bone cutting blade portion having a blade portion capable of cutting hard cortical bone is formed at a predetermined height at the lower end of the body portion of the countersink drill, Since the guide portion is formed at the lower portion, only the cortical bone of a predetermined depth can be cut from the top of the bone by rotating the cortical bone cutting blade portion 50 times per minute while maintaining the drilling direction at the guide portion. Excellent convenience to accurately form an appropriate embedding cavity by drilling once.

  The drilling system according to claim 2, wherein the drill with a stopper is formed with a drill portion formed at a tip corresponding to the depth of the embedding pit, and provided with a locking portion. A plurality of cutout portions are provided depending on the depth, and the height can be adjusted by locking the cutout portions to the locking portions. At this time, the stopper is locked while securing the height position of the desired depth only by matching the mark line of the stopper with the desired depth line as in the tenth aspect.

Therefore, it is only necessary to cut with a flat plate four-blade drill until the height-adjusted stopper comes into contact with the flat bone surface formed by the countersink drill (the position of the platform of the implant body). The desired embedding cavity can be accurately formed (Claim 3). That is, since the stopper of the drill with a stopper indicates a predetermined depth, it is not necessary to control the depth by visual inspection or sense without conventional interruption, so that drilling with less stress for the operator is realized. Therefore, by installing and setting a stopper at the planned embedding depth, drilling is completed if the stopper contacts the flat bone surface, so there is no risk of accidentally drilling deeply and damaging the nerve u. In addition, it is possible to form an accurate embedding cavity at an accurate depth.

Therefore, after cutting only the cortical bone of a predetermined depth from the top of the bone by 50 rotations per minute of the cortical bone cutting blade of the canter sink drill, appropriate drilling is performed by 50 rotations per minute of the drill with the stopper. The cavity can be accurately formed, eliminating the need to change the drill many times, greatly shortening the operation time, and reducing the burden on the operator and patient. Eventually, the implant body is reliably embedded at a desired position, and a high-quality dental implant is provided.

The present drill ring system, since the cortical bone cutting edge portion of the countersink drill is formed in 2mm, reliably cut only the cortical bone substantially 2mm from crest by rotation of the cortical bone cutting edge portion, followed by the stopper Contributes to the formation of an appropriate embedding cavity by one drilling of a drill with a drill

  Furthermore, when the height of the metal part of the upper structure (abutment) is 2 mm, the cortical bone cutting blade is set to 2 mm as described above to drill hard cortical bone in the first stage. It is not necessary to adjust by drilling again when attaching the abutment, and the cortical bone part is beautifully drilled, which is also aesthetically superior.

The cortical bone cutting blade of the countersink drill has four blades, so that stable cutting is possible and cortical bone can be cut at a low speed of 50 revolutions per minute under no water injection. ( Claim 4 ) Therefore, there is no harmful effect on the bone tissue due to fever, no water injection, no unnecessary washing promoting substances necessary for living bodies are washed away, and postoperative pain can be reduced. Have.

Moreover, on the outer periphery of the body portion of the counterparty sink drill, since bone harvested groove formed in an elongated recess in the axial direction is formed with a plurality, while drilling under no irrigation as described above, the bone taken groove In addition, it collects and uses autologous bone to contribute to the realization of high-quality implants.

Furthermore, the drill with a stopper according to claim 9 is configured to be able to form an embedding cavity at 50 revolutions per minute under non-injection water. This is a rotational speed that suppresses fever and does not damage healthy bones, and does not require water injection to form the embedding fossa, so it does not wash away precious blood and growth factors, postoperative pain It also has the effect of minimizing.

It is the perspective view which showed the whole structure of the countersink drill in the drilling system of this invention.

A and B are a front view and a bottom view of the countersink drill.

A and B are a front view and a rear view of a drill with a stopper, and C is a view rotated 90 ° from the state of B.

A is a general view showing the assembly procedure of a drill with a stopper, and B is a bottom view of the drill without the stopper.

A to H are explanatory views showing an implant process including an example of use of the drilling system of the present invention.

It is explanatory drawing which showed the use condition of the pilot drill of FIG. 5B.

It is explanatory drawing which showed the usage condition of the counter sink drill of FIG. 5C.

It is explanatory drawing which showed the use condition of the drill with a stopper of FIG. 5D.

It is explanatory drawing which showed the usage condition of the apical reamer of FIG. 5E.

It is explanatory drawing which showed the formation condition of the embedding fossa.

It is explanatory drawing which showed the extraction procedure of the implant body.

It is explanatory drawing which showed the implantation condition of the implant body of FIG. 5F.

It is explanatory drawing which showed the removal state of the implant adapter of FIG. 5E.

It is explanatory drawing which showed the stitching | suture state.

It is explanatory drawing which showed the completion state of the implant.

A and B are explanatory views showing an example of use of a conventional drill.

A preferred embodiment of the dental implant drilling system of the present invention will be described below with reference to the drawings. The embodiment relates to the invention of this claim 1-5 Symbol mounting so are common will be described collectively as follows.

  First, a counter sink drill A suitable for implementing the drilling system of the present invention will be described. As shown in FIGS. 5C and 7, the countersink drill A is suitable for a dental implant drilling system for cutting hard cortical bone C during implant surgery.

  As shown in FIGS. 1 and 2, the overall structure of the countersink drill A is formed by integrally forming a stainless steel contra-shaft portion 1, a body portion 3, a cortical bone cutting blade portion 5, and a guide portion 7. The total length is 27 mm.

  The rod-shaped contra-shaft portion 1 has a connecting portion 1a for connecting a contra-angle handpiece G (see FIG. 6) at the upper end i, and a cylindrical body portion 3 is formed in a lower portion j. The outer diameter of the body portion 3 of the present embodiment is formed to be φ = 5.5 mm which is the same as the maximum outer diameter W (φ = 5.5 mm) of the blade portion 6 of the cortical bone cutting blade portion 5 described later. A cortical bone cutting blade portion 5 having a blade portion 6 capable of cutting hard cortical bone C is formed at the lower end k of the body portion 3.

  The height H of the blade portion 6 of the cortical bone cutting blade portion 5 is 2 mm. A portion of the hard cortical bone C 2 mm from the bone top F is reliably cut (FIG. 5C), and is set to be substantially the same as the height of the metal portion 2a of the implant body 2 described later (FIG. 5H).

  The said blade part 6 is demonstrated. The blade portion 6 is a four-blade blade that realizes stable low-speed rotation (such as 50 rotations per minute). Each blade portion 6 is divided into four at the lower bottom portion 6a having a maximum outer diameter W shown in FIG. 2A of φ = 5.5 mm as viewed from the lower surface of FIG. 2B. One blade portion 6 formed on each radial line of the lower bottom portion 6a reaches the next blade portion 6 that is 90 degrees apart and reaches the next blade portion 6 in the range of height H = 2 mm in the rotation direction (clockwise). An arc is drawn while gradually rising, and finally the upper outer periphery 6b is slightly narrowed to be smaller than the maximum outer diameter W (FIG. 2A). Here, the outer diameter of the upper outer periphery 6b is 4.35 mm.

  In the present embodiment, the maximum outer diameter W of the blade portion 6 is φ = 5.5 mm, but the maximum outer diameter W is in a range of five steps between φ = 4.45 and φ = 6.5. The blade part 6 is suitably implemented (each explanation is omitted).

  A total of four elongated concave bone-collecting grooves 4 rising in the axial direction are formed on the outer periphery v of the upper body portion 3 from the upper outer periphery 6b of each blade portion 6 of the cortical bone cutting blade portion 5 described above. This is because the autologous bone that rises when drilling with the blade portion 6 of the bone cutting blade portion 5 is effectively collected.

  In the lower part m of the cortical bone cutting blade part 5, a columnar guide part 7 (length = 3 mm) retrofitted from below is formed at the center of the cortical bone cutting blade part 5. This is to serve as a guide for forming the embedding cavity S at a predetermined position (see FIG. 5C).

  Next, the stopper drill B will be described.

  This drill B with a stopper is preferably used when the embedding cavity S is formed by one drilling after cutting the hard cortical bone C with the countersink drill A described above (FIG. 5D, FIG. 5). 8).

  As shown in FIG. 3, the drill B with a stopper is configured such that a stainless steel contra-shaft portion 18, a body portion 17 and a drill portion 9 are integrally formed, and a stopper 10 is retrofitted. The total length is 36 mm.

  As with the counter sink drill A, the rod-shaped contra-shaft portion 18 includes a connection portion 8a for connecting a contra-angle handpiece G (see FIG. 6) at the upper end, and a cylindrical body portion 17 below. Is formed. The outer diameter of the body part 17 is formed at φ = 3.5 mm. A convex locking part 19 to which the stopper 10 can be locked is provided on the body part 17 at the upper part of the drill part 9 described below.

  The drill portion 9 is formed over the lower end of the body portion 17 and at least a portion corresponding to the depth of the embedding cavity S. In the present embodiment, the length from the lowest part is about 14.7 mm.

  Specifically, as indicated by reference numerals 90, 91, 92, and 93 in FIG. 4, the drill portion 9 is formed by four flat blades arranged at every 90 degrees. The cancellous bone D (cortical bone C) is cut by low-speed rotation (50 rotations per minute, etc.) under non-injected water, thereby realizing the formation of the embedding cavity S.

  And four horizontal depth lines 16 ... which show four different depth levels are provided in the outer periphery of the drill part 9 or the trunk | drum 17 by laser marking. This is to facilitate the adjustment of the position of the stopper 10 described below.

  The stopper 10 is formed in a cylindrical shape having a size that fits with the body portion 17 of the drill B, as shown in the lower part of FIGS. 3A, 3B and 4A. Four notches 11... Notched from the horizontal direction on the right side surface are provided according to the four depth levels. That is, the notches 11 are formed at positions corresponding to the four depth lines 16 of the trunk portion 17. In addition, one mark line 13 is provided on the outer periphery between the lowermost notch 11 of the stopper 10 and the notch 11 just above it. And the guide part 12 which is notched from the upper part of the said stopper 10 to the front near the lower part, and leads to each said notch part 11 ... is formed.

  Thus, as shown in FIG. 4A, the stopper 10 is fitted upward from below the drill portion 9, and the guide portion 12 is passed through the convex locking portion 19. Then, in a state where the mark line 13 matches the desired depth line 16, the height adjustment and locking of the stopper 10 can be performed simply by rotating the notch 11 to the convex locking portion 19 to the left and locking it. (FIGS. 3A and B).

  Below, the usage example of this drilling system is demonstrated (refer FIGS. 5-15).

  First, as shown in FIG. 5A, the implantation position is determined in advance, and the cortical bone C 2 mm below the bone crest F at the desired position is penetrated by the round bar 30 at 800 rpm / water injection. Then, as shown in FIG. 5B and FIG. 6, the pilot drill 40 (φ = 2 mm) set to the length of the implant body + 2 mm is connected to the contra-angle handpiece G and drilled, and the embedding direction and depth are set in advance. decide.

  As shown in FIG. 5C and FIG. 7, the tip of the guide portion 7 of the countersink drill A is applied to the hole formed by the pilot drill 40, and a little vibration is applied along the implant placement direction. The cortical bone C is drilled by the cortical bone cutting blade 5 at 50 revolutions per minute. A 2 mm cut from the alveolar crest A is a guide. The flat bone surface y (FIG. 5C) formed by the countersink drill A is the position x (FIG. 5H) of the platform 20.

  Next, FIG. 5D and FIG. 8 are usage examples of the drill B with a stopper. The height position of the stopper 10 is determined and locked to the locking portion 19 so as to cut the drill B with stopper in advance by the length of the selected implant body 2 (FIG. 3A). While following the flat bone surface y formed by the counter sink drill A, drilling is performed with no water injection at 50 revolutions per minute up to the position of the stopper 10 of the drill B with stopper to form the embedding cavity S. This low-speed rotation of 50 rotations per minute is a rotation number that suppresses heat generation and does not damage healthy bones. In addition, since water injection is not required to form the embedding cavity S, precious blood and growth factors are not washed away. In addition, the autologous bone adhering to the drill B is collected and used for reuse.

  When the embedding cavity S is formed by the drill B with the stopper, the stopper 10 abuts on the flat bone surface y formed by the countersink drill A, so that a predetermined drilling corresponding to the length of the implant body 2 is achieved. Therefore, the embedding cavity S having a desired depth is formed without fear of unexpectedly cutting deeply and damaging the nerve u.

  Thereafter, an embodiment using the apical reamer 50 shown in FIGS. 5E and 9 is preferred. That is, the embedding cavity S is adjusted to the final depth (the length of the implant body 2 + 2 mm) with the cylindrical apical reamer 50 having a steep blade at the lower end. The apical reamer 50 can completely scrape the self-bone remaining in the embedding cavity S and the bottom thereof simultaneously with the adjustment of the embedding cavity formation.

  Thus, as shown in FIG. 10, the embedding cavity S having a desired depth is accurately formed.

  FIG. 11 shows a procedure for taking out the implant body 2. The cap of the external vial 70 is removed, and the driver contra 60 is attached to the adapter unit 71. The implant body 2 is taken out from the external vial 70, and the internal vial 72 is removed so as not to touch the implant body 2.

  Then, as shown in FIG. 12, the implant body 2 is embedded in the embedding cavity S by the driver contra 60 (FIG. 5F). When using the contra-angle handpiece G, the maximum speed is 20 rotations per minute and the maximum torque is 35 Ncm. When finely adjusting the embedding depth, a hand wrench or torque wrench (not shown) is used. Initial fixation is established as soon as the implantation is at the desired depth.

  When the initial fixation is established, the adapter 2b is removed by reversely rotating the fixing screw of the implant adapter 2b. After confirming that the cover screw 2c is not loose, the autologous bone collected during drilling is transplanted between the cover screw 2c and the bone C.

  As shown in FIG. 14, sutures are made so that saliva does not adhere to the gingival mucosal flap and jawbone. If necessary, make sufficient incision to remove excess tension.

  Thereafter, a secondary operation is omitted, and the upper structure 21 is attached to the upper connection portion of the implant body 2 to complete a high-quality implant (FIGS. 5H and 15).

A Countersink drill 1 Contra shaft part 3 Body part 4 Bone extraction groove part 5 Cortical bone cutting blade part 6 Blade part 7 Guide part B Drill with stopper 9 Drill part 10 Stopper 11 Notch part 13 Marking line 16 Depth line 17 Body part 18 Contra Shaft portion 19 Locking portion 2 Implant body 20 Platform 21 Superstructure F Top of bone C Cortical bone D Cancellous bone S Embedment H Predetermined height x Platform position y Flat bone surface

Claims (5)

A dental implant drilling system for cutting hard cortical bone during implant surgery,
Consists of a countersink drill consisting of a contra-shaft part, a torso part, a cortical bone cutting blade part, and a guide part, and the rod-like contra-shaft part has a connecting part at the upper end and a trunk part is formed below, A cortical bone cutting blade portion having a blade portion capable of cutting hard cortical bone is formed at a predetermined height at a lower end of the body portion, and a guide portion is formed at a lower portion of the cortical bone cutting blade portion, A dental implant drilling system characterized in that a cortical bone having a predetermined depth can be cut from a bone crest by 50 rotations per minute of a cortical bone cutting blade. A dental implant drilling system for forming an embedding cavity by one drilling after cutting hard cortical bone during implant surgery,
Consists of a drill with a stopper comprising a contra-shaft part, a body part, a drill part, and a stopper, and the rod-like contra-shaft part has a connection part at the upper end and a body part formed at the lower part, at the lower end of the body part A drill portion is formed at least at a portion corresponding to the depth of the embedding cavity, and a convex locking portion is provided on the body portion above the drill portion, and the stopper is provided in accordance with several depths. is formed in the cut has been notch cylindrical having a plurality of Te, the stopper are mounted for height adjustment by locking to the convex locking portion of the notch, every minute of the drill portion 50 A dental implant drilling system characterized in that a desired embedding cavity can be formed by cutting cortical bone or cancellous bone by rotation. A dental implant drilling system in which hard cortical bone is cut during an implant operation and an embedding cavity is formed by one drilling,
a) It is composed of a countersink drill composed of a contra-shaft portion, a trunk portion, a cortical bone cutting blade portion and a guide portion, and a drill with a stopper composed of a contra-shaft portion, a trunk portion, a drill portion and a stopper,
b) In the countersink drill, the rod-shaped contra-shaft portion has a connecting portion at the upper end and a body portion is formed below, and a blade portion capable of cutting hard cortical bone is provided at the lower end of the body portion. The cortical bone cutting blade portion provided is formed at a predetermined height, and a guide portion is formed below the cortical bone cutting blade portion. The cortical bone cutting blade portion has a predetermined depth from the top of the bone by 50 rotations per minute . By cutting the cortical bone, a flat bone surface can be formed at the position of the platform of the implant body,
c) In the drill with a stopper, a drill portion formed at least at a portion corresponding to the depth of the embedding cavity is formed at the tip of the contra-shaft portion, and a locking portion is provided at the upper portion of the drill portion. A cylindrical stopper having a plurality of cutout portions corresponding to several levels of depth is attached so that the height can be adjusted by locking the cutout portion to the locking portion, and is formed by the counter sink drill. A desired embedding cavity can be formed by cutting cortical bone or cancellous bone by 50 rotations per minute of the drill portion until the stopper comes into contact with a flat bone surface,
A dental implant drilling system characterized by 4. The dental implant drilling system according to claim 1 or 3, wherein the cortical bone cutting blade portion of the countersink drill is configured to freely cut cortical bone at 50 revolutions per minute under non-injected water. 4. The dental implant drilling system according to claim 2, wherein the drill with a stopper is configured to be able to form an embedding cavity at 50 revolutions per minute under non-injected water.