Implant drill and implant drill set

Description

[0001] The present invention relates to an implant drill for producing boreholes in jawbone for dental implants.

[0002] The invention further relates to an implant drill set comprising such an implant drill.

[0003] Dental implants, which serve as supports for dentures, are inserted into the jawbone, usually by screwing them in. For this, the jawbone must be prepared by creating a hole whose size and shape correspond as precisely as possible to the implant being inserted. Several implant drills are typically required for each dental implant in order to create different sections of the hole with varying diameters.

[0004] The implant drills known from the prior art are typically manufactured as a single piece, comprising a drill bit and an actuating section for connection to a hand instrument used to operate the drill. These implant drills are intended for multiple uses, with a specific drill (or set of drills) required for each dental implant. The implant drills are uniformly made of a material with the hardness required for the drill bit, usually high-strength stainless steel or ceramic. Manufacturing the drills is relatively complex due to the different sections with their respective geometries.

[0005] German patent application DE 10 2021 107077 A1 discloses a drill for alveolar bone comprising a main body and a collecting cover. The main body has a first cutting plate and a second cutting plate, which are manufactured by stamping, inserted into one another in a cross-like offset, and welded together to form a drill insert with a drill point at its lower end and a shank at its upper end.

[0006] The invention is based on the objective of proposing an implant drill and an implant drill set that can be manufactured with reduced effort and used flexibly.

[0007] This problem is solved according to the invention by an implant drill according to claim 1.

[0008] The invention is based on the fundamental idea of ​​manufacturing the drill bit element and the holding device as two separate parts that can be positively connected to each other via a simple mechanism. The first significant advantage of this is that only one or a few standardized holding devices can be combined with a variety of different drill bit elements (adapted to the respective dental implants) to form an implant drill. The holding device can therefore be manufactured cost-effectively in a correspondingly large quantity.

[0009] A second significant advantage arises from the fact that, in the implant drill according to the invention, only the drill bit element needs to be made of a high-strength material, while a more cost-effective material (e.g., simple stainless steel) can be used for the holding device. In contrast, one-piece implant drills must be made entirely of a high-strength material, which leads to increased costs.

[0010] In a preferred embodiment of the implant drill according to the invention, the holding section of the holding device has a cylindrical outer surface that serves to be received in a drill sleeve with a corresponding cylindrical inner surface. The drill sleeve is located in a template that rests on the patient's dentition, so that the position and orientation of the bore can be precisely determined with the aid of the drill sleeve. Due to its essentially rotationally symmetrical shape, the holding device can advantageously be manufactured by a material-removing process such as turning, which reduces manufacturing costs. Preferably, the holding device is made of stainless steel.

[0011] The drill bit element of the implant drill according to the invention consists of a flat material whose edges are chamfered in the area of ​​the blade section. Such a drill bit element also has the advantage that it can be easily manufactured in the required size and geometry.

[0012] Preferably, the drill blade element is formed in one piece from a ceramic material or from a metallic material, in particular from high-strength stainless steel or surgical steel.

[0013] The drill bit element is advantageously manufactured by electrical discharge machining (EDM), particularly spark EDM. This manufacturing process allows the drill bit element to be cut from a larger sheet of material and simultaneously provided with a beveled edge in the cutting section, forming the drill bit, in a single operation. The beveled edges typically have an angle of 12° to 18° to the thickness direction of the drill bit element, for example, 15°.

[0014] The drill bit element preferably has a substantially constant thickness, preferably in the range of approximately 0.25 to approximately 0.8 mm, and more preferably from approximately 0.5 to 0.7 mm. However, the drill bit element may also have a reduced thickness in the region of the tip of the blade section.

[0015] In the holding section of the implant drill according to the invention, the receiving surfaces of the slot-shaped receptacle preferably have a distance that corresponds to the thickness of the drill bit element in order to accommodate the connecting section of the drill bit element with virtually no play. In this way, a secure and precise transmission of torque from the holding device to the drill bit element is ensured when the bore is created in the bone.

[0016] The actuating section of the holding device is preferably designed for a rotationally fixed, detachable connection with a handle. This type of connection with a handle is known from the prior art of implant drills.

[0017] According to the invention, the drill bit element can be detachably connected to the holding device by means of a snap-fit ​​or detent connection. In this case, the holding device, which does not come into direct contact with the patient's body, can potentially be reused multiple times, thereby achieving further cost advantages. At a minimum, one holding device can be successively connected to and used with two or more drill bit elements during the creation of a borehole to produce and / or enlarge the different sections of the borehole.

[0018] According to an advantageous embodiment, the connecting section of the blade element has a central guide section and two lateral wing sections spaced apart from the guide section, each wing section having a locking lug oriented towards the axis of rotation. The slot-shaped receptacle does not extend over the entire diameter of the holding section, but has a width that essentially corresponds to the width of the central guide section. The holding section has two opposing recesses on its outer circumference for receiving the locking lugs. When the drill blade element is inserted into the holding device, the locking lugs engage, thus securing the drill blade element, which is detachably connected to the holding device, in particular against axial or radial movement.Advantageously, the locked connection can be easily released using a release tool. For this purpose, it is preferred that the retaining section adjacent to the recesses has a contact surface for a release tool in order to move the lateral wing sections apart and release the connection between the drill bit element and the retaining device.

[0019] The holding device preferably has a cleaning bore that connects the end of the slotted receptacle facing the actuating section with the outer circumference of the holding section. This ensures effective flushing of the slotted receptacle during cleaning when the holding device is reused.

[0020] The present invention also relates to an implant drill set comprising an implant drill according to the invention with a detachable connection between the drill blade element and the holding device, as well as one or more further drill blade elements, wherein each drill blade element has a connecting section which can be inserted axially into the receptacle of the holding section of the holding device in order to connect the drill blade element to the holding device in a rotationally fixed manner.

[0021] In the implant drill set according to the invention, a single holding device is sufficient, which only needs to be adapted to the outer diameter of the holding section in relation to the drill sleeve to be used. The holding device can be combined with a range of different drill bit elements in the set, both for creating a single borehole in the jawbone with different sections and for creating multiple boreholes after appropriate cleaning of the holding device. Compared to a series of implant drills, each consisting of a drill bit element and a holding device as a single unit, the set according to the invention enables significant material and cost savings.

[0022] Within the implant drill set according to the invention, the connecting sections of all drill blade elements are preferably designed in the same way, while the blade sections of the drill blade elements can each be designed in the same or different ways.

[0023] The blade sections of the drill bit elements can be designed differently, in particular to successively create and / or widen different sub-areas of a borehole in the jawbone.

[0024] These and other advantages of the invention will be explained in more detail with reference to the following exemplary embodiments and the figures.

[0025] They show in detail: Figure 1: A holding device according to a first, non-inventive embodiment of an implant drill in a side view ( Fig. 1A ), a perspective view ( Fig. 1B ) and a top view ( Fig. 1C); Figure 2: a drill blade element according to the first embodiment in a side view ( Fig. 2A ), a perspective view ( Fig. 2B ) and a top view ( Fig. 2C ); Figure 3: an implant drill according to the first embodiment in a side view ( Fig. 3A ), a perspective view ( Fig. 3B ), a top view ( Fig. 3C ) and a longitudinal section ( Fig. 3D ); Figure 4: a holding device according to a second, non-inventive embodiment of an implant drill in a side view ( Fig. 4A ), a perspective view ( Fig. 4B ) and a top view ( Fig. 4C ); Figure 5: a drill blade element according to the second embodiment in a side view ( Fig. 5A ), perspective view ( Fig. 5B ) and a top view ( Fig. 5C ); Figure 6: an implant drill according to the second embodiment in a side view ( Fig. 6A ), a perspective view ( Fig. 6B ), a top view ( Fig. 6C ) and a longitudinal section ( Fig. 6D ); Figure 7: a holding device according to a third embodiment of an implant drill according to the invention in a side view ( Fig. 7A ), a perspective view ( Fig. 7B ) and a top view ( Fig. 7C ); Figure 8: a drill blade element according to the third embodiment in a side view ( Fig. 8A ), a perspective view ( Fig. 8B ) and a top view ( Fig. 8C ); and Figure 9: an implant drill according to the third embodiment in a side view ( Fig. 9A ), a perspective view ( Fig. 9B ), a top view ( Fig. 9C ) and a longitudinal section ( Fig. 9D ).

[0026] A first, non-inventive embodiment of an implant drill 10 for producing boreholes in the jawbone for dental implants is described in the Figures 1A to 3D shown. Here, the Figures 1A to 1Conly the holding device 12, which Figures 2A to 2C only the drill blade element 14 and the Figures 3A to 3C Figure 1 shows the implant drill 10 comprising the drill blade element 14 and the holding device 12, each in a side view, a perspective view and a top view from below. 3D figure shows a longitudinal section through the implant drill 10.

[0027] The holding device 12 is essentially rotationally symmetrical with respect to an axis of rotation that extends from top to bottom in the side and perspective views. At its upper end, the holding device 12 includes an actuating section 16, via which the implant drill 10 can be connected to a handle (not shown in the figures). The implant drill 10 is actuated via this handle or hand instrument.

[0028] At its lower end, the holding device 12 includes a holding section 18 for connection with the drill blade element 14. The holding section 18 has a slot-shaped receptacle 20 with two mutually parallel receiving surfaces 22.

[0029] In the area of ​​the holding section 18, the holding device 12 has a cylindrical outer surface 24. This serves in particular to receive the implant drill 10 in a drill sleeve (not shown in the figures) with a corresponding cylindrical inner surface.

[0030] The drill bit element 14 is essentially mirror-symmetrical with respect to the axis of rotation of the holding device 12. It comprises a blade section 26 in its lower region for creating the bore in the jawbone and a connecting section 28 in its upper region for connecting to the holding section 18 of the holding device 12. The drill bit element 14 is made of a flat material, for example, with a thickness in the range of approximately 0.5 to approximately 0.7 mm, and has chamfered edges 30 at least in the blade section 26 (for example, at an angle of approximately 15° to the thickness direction of the drill bit element 14). The drill bit element 14 according to this first, non-inventive embodiment of the implant drill consists of a high-strength stainless steel, in particular surgical steel, and can advantageously be manufactured by electrical discharge machining (EDM).

[0031] For the holding device 12 of the implant drill 10, a stainless steel with a lower strength compared to the drill blade element 14 can be used, which can result in cost savings compared to a one-piece implant drill.

[0032] The connecting section 28 of the drill blade element 14 can be inserted axially into the slot-shaped receptacle 20 in the holding section 18 of the holding device 12 and is held without play between the receiving surfaces 22, as shown in the Figures 3A to 3C In this first embodiment of the implant drill 10, the drill blade element 14 is provided for permanent connection with the holding device 12; for this purpose, the holding section 18 of the drill blade element 14 is welded to the receiving surfaces 22 of the holding device 12 (preferably by laser welding).

[0033] A second embodiment of an implant drill 40, not according to the invention, is the Figures 4A to 6C depicted, whereby the Figures 4A to 4C only the holding device 12 show the Figures 5A to 5C only the drill blade element 14 and the Figures 6A to 6D the implant drill 40 comprising the drill blade element 14 and the holding device 12. Identical or corresponding elements are each provided with the same reference numeral as in the Figures 1A to 3C of the first embodiment.

[0034] The implant drill 40 of the second embodiment differs from the implant drill 10 of the first embodiment in that the drill bit element 14 is not made of high-strength stainless steel, but of a ceramic material. The drill bit element 14 is also permanently connected to the holding device 12 in this case, with this connection being made in particular by bonding.

[0035] To optimize the adhesive bond, the connecting section 28 of the ceramic drill bit element 14 has a different geometry, namely a section 42 with a smaller width than the rest of the connecting section 28. When the drill bit element 14 is connected to the holding device 12, the section 42 engages in a corresponding receptacle 44 in the holding section 18 of the holding device 12, which extends above the slot-shaped receptacle 20 (see Figure 6D ).

[0036] A third embodiment of an implant drill 50 according to the invention is described in the Figures 7A to 9D depicted, whereby the Figures 7A to 7C only the holding device 12 show the Figures 8A to 8C only the drill blade element 14 and the Figures 9A to 9D The implant drill 50 comprises the holding device 12 and the drill blade element 14. Identical or corresponding elements are each provided with the same reference numeral as in the Figures 1A to 3Dof the first embodiment and the Figures 4A to 6D of the second embodiment.

[0037] In the third embodiment of the implant drill 50, a detachable connection is provided between the holding device 12 and the drill bit element 14, which in this case is realized via a mechanical snap-fit ​​connection. As in the first embodiment, the drill bit element 14 is made of a high-strength stainless steel, in particular surgical steel.

[0038] To form the locking mechanism, the connecting section 28 of the drill blade element 14 has a central guide section 52 and two lateral wing sections 54, which are spaced apart from the guide section 52. Each wing section 54 has a locking lug 56 oriented towards the axis of rotation.

[0039] In the holding section 18 of the holding device 12 of the implant drill 50, the slot-shaped receptacle 20 does not extend over the entire diameter of the holding section 18, but has a width that essentially corresponds to the width of the central guide section 42 of the drill bit element 14. The holding section 18 has two opposing recesses 58 on its outer circumference for receiving the locking lugs 56. When the connecting section 28 of the drill bit element 14 is inserted into the slot-shaped receptacle 20 of the holding device 12, the locking connection is thus established. The drill bit element 14 is then rotationally fixed to the holding device 12 and secured against axial or radial movement.

[0040] To release the connection between the drill bit element 14 and the holding device 12, the locking connection must be released by moving the wing sections 54 outwards. This is advantageously done using a release tool. The holding section 18 of the holding device 12 has a contact surface 60 adjacent to each of the recesses 58 for such a release tool. This tool is moved downwards along the contact surface 60 to push the wing sections 54 outwards and release the connection between the drill bit element 14 and the holding device 12.

[0041] The holding device 12 of the implant drill 50 additionally has a cleaning bore 62, which connects the end of the slotted receptacle 20 pointing towards the actuating section 16 with the outer circumference 24 of the holding section 18. This ensures effective rinsing of the slotted receptacle 20 when cleaning the holding device 12.

[0042] The holding device 12 of the implant drill 50 according to the third embodiment is suitable as a component of an implant drill set according to the invention. Such an implant drill set can comprise a plurality of different drill blade elements 14, the connecting sections 28 of which are each identically designed for connection with the holding device 12, but which have different blade sections 26 in order to successively create and / or widen different partial areas of a bore in the jawbone, or to be able to create bores for different dental implants.

[0043] The implant drill set according to the invention enables a significant saving in material and costs compared to implant drill sets that each comprise one-piece implant drills. Reference symbol list

[0044] 10 Implant drill 12 Holding device 14 Drill blade element 16 Actuating section 18 Holding section 20 Slotted receptacle 22 Receptacle surface 24 Cylindrical outer surface 26 Blade section 28 Connecting section 30 Beveled edges 40 Implant drill 42 Narrower section 44 Receptacle 50 Implant drill 52 Central guide section 54 Lateral wing sections 56 Locking lugs 58 Recesses 60 Contact surface 62 Cleaning hole

Claims

1. Implant drill (10; 40; 50) for producing bores in the jaw bone for dental implants, comprising - a drill blade element (14) which consists of a flat material and is configured substantially mirror-symmetrical relative to a rotation axis of the implant drill, comprising a blade portion (26) with bevelled edges (30) for producing the bore in the jaw bone and a connecting portion (28), which are arranged in the axial direction at opposite ends of the drill blade element; and - a holding apparatus (12) which is configured substantially rotationally symmetrical relative to the rotation axis, wherein the holding apparatus comprises a holding portion (18) and an actuating portion (16), which are arranged in the axial direction at opposite ends of the holding apparatus, and wherein the holding portion has a slot-shaped receptacle (20) that is mirror-symmetrical relative to the rotation axis, with two mutually parallel receptacle surfaces (22), wherein the connecting portion of the drill blade element is introducible in the axial direction into the receptacle of the holding portion of the holding apparatus, in order to connect the drill blade element non-rotatably to the holding apparatus, characterized in that the drill blade element is releasably connectable to the holding apparatus by means of a latching connection or snap-fit connection.

2. Implant drill (10; 40; 50) according to claim 1, wherein the holding portion (18) has a cylindrical outer surface (24) to be received in a drilling sleeve with a corresponding cylindrical inner surface.

3. Implant drill (10; 40; 50) according to claim 1 or 2, wherein the holding apparatus (12) is made from high-grade steel.

4. Implant drill (10; 40; 50) according to one of the preceding claims, wherein the drill blade element (14) is formed integrally from a ceramic material or a metallic material, in particular, from high-strength high-grade steel or surgical steel.

5. Implant drill (10; 40; 50) according to one of the preceding claims, wherein the drill blade element (14) is produced by means of eroding, in particular, by means of spark eroding.

6. Implant drill (10; 40; 50) according to one of the preceding claims, wherein the drill blade element (14) has a substantially constant thickness, preferably in the range from approximately 0.25 to approximately 0.8 mm, more preferably from approximately 0.5 to approximately 0.7 mm; and / or wherein the receptacle surfaces (22) of the slot-shaped receptacle (20) in the holding portion (18) have a spacing that corresponds to the thickness of the drill blade element (14) in order to receive the connecting portion (28) of the drill blade element substantially play-free.

7. Implant drill (10; 40; 50) according to one of the preceding claims, wherein the actuating portion (16) is configured for non-rotatable, releasable connection to a handle.

8. Implant drill (50) according to one of the preceding claims, wherein the connecting portion (28) of the drill blade element (14) has a central guide portion (52) and two lateral wing portions (54) spaced from the guide portion, wherein the wing portions each have a latching nose (56) oriented toward the rotation axis, wherein the slot-shaped receptacle (20) does not extend over the whole diameter of the holding portion (18), but rather has a width that substantially corresponds to the width of the central guide portion, and wherein the holding portion has two recesses (58) disposed opposite one another on its outer periphery (24) for receiving the latching noses.

9. Implant drill (50) according to claim 8, wherein, adjoining each of the recesses (58), the holding portion (18) has a respective contact surface (60) for an unlocking tool, in order to move the lateral wing portions (54) apart and to release the connection between the drill blade element (14) and the holding apparatus (12).

10. Implant drill (50) according to one of the preceding claims, wherein the holding apparatus (12) has a cleaning bore (62) which connects the end of the slot-shaped receptacle (20) orientated in the direction of the actuating portion (16) to the outer periphery (24) of the holding portion (18).

11. Implant drill set comprising an implant drill (50) according to one of the preceding claims and one or more further drill blade elements (14), wherein each drill blade element has a connecting portion (28) which is introducible in the axial direction into the receptacle (20) of the holding portion (18) of the holding apparatus (12), in order to connect the drill blade element non-rotatably to the holding apparatus.

12. Implant drill set according to claim 11, wherein the connecting portions (28) of all the drill blade elements (14) are configured identically, and wherein the blade portions (26) of the drill blade elements are configured identically or differently, wherein preferably the blade portions (26) of the drill blade elements (14) are configured differently, in order to produce and / or widen different partial regions of a bore in the jaw bone sequentially.