Tool for medical treatment, tool tip, moving part and / or handpiece for such a tool and method for producing such a tool for medical treatment

Abstract

A tool (1) for medical treatment, in particular for dental treatment, comprising: a handpiece (40) having an ultrasonic vibration source (30); a moving part (10), which performs a vibrating movement along a vibration direction (VD) in an operating state; and a tool tip (20), in particular a scraper tip, which is connected to the moving part (10) in a coupling section (15), wherein, in a non-vibrating state, the tool tip extends in the coupling section (15) along an extension direction that is inclined relative to the vibration direction of the moving part (10).

Description

[0001] The present invention relates to a tool for medical treatment, a tool tip, a moving part and / or a handpiece for such a tool and a method for producing such a tool.

[0002] In particular, the invention relates to a tool for medical treatment, which during its operation forms a vibrating motion, such as an oscillating motion. For example, the tool is a curette intended for removing dental calculus during dental treatment.

[0003] Plaque, especially during home care treatment, mainly occurs in areas of the oral cavity that are difficult to reach during treatment, for example by toothbrush or water spray. These areas are also difficult to reach during professional care treatment, especially during scraping, and the plaque formed is hard and firmly attached to the teeth.

[0004] It is well known that ultrasonic curettage can remove hard calculus due to the power of ultrasonic vibration and the low impact on teeth. Therefore, the tool tip, in particular the curettage tip, is usually designed as a replaceable element, which can be screwed to a moving part that performs a vibrating motion along the vibration direction. Therefore, the tool tip of the prior art usually includes a screwing section, which extends along the vibration direction in the installed state and is located at the proximal end of the curettage tip, which is the end opposite to the pointed tip of the distal end of the curettage.

[0005] In view of the above, the object of the present invention is to improve a tool for medical treatment, in particular dental treatment, wherein the tool forms a vibrating motion during its operation, in order to particularly improve the efficiency of transmitting the vibrating motion from the ultrasonic source to the tip element and to improve the handling of the tool.

[0006] This object is achieved by a tool according to claim 1, a tool tip according to claim 13, a handpiece and / or a moving part of such a tool according to claim 14 and a method for producing such a tool according to claim 15. Preferred embodiments are contained in the dependent claims, the description and the drawings.

[0007] According to a first aspect of the present invention, there is provided a tool for medical treatment, in particular for dental treatment, the tool comprising:

[0008] a handpiece having a vibration source, in particular an ultrasonic vibration source, i.e. a vibration source which causes ultrasonic vibrations,

[0009] a mobile part which, in a vibrating state, performs a vibrating movement, in particular an ultrasonic movement, along a vibration direction, and

[0010] a tool tip, in particular a curettage tip, which, at least in the operating state, is connected to the moving part in a coupling section,

[0011] Therein, in the non-vibrating state, the tool tip extends in the engagement section along an extension direction that is inclined relative to the vibration direction.

[0012] In contrast to the prior art, according to the invention, it can be provided that the tool tip is connected to the moving part such that in the engagement section the extension direction of the tool tip is inclined relative to the moving part, in particular relative to the vibration direction of the moving part. Surprisingly, the results show that such an alignment of the tool tip relative to the vibration direction and in particular the avoidance of a threaded section for screwing the tool tip to the moving part allows the vibrating movement of the moving part to be transmitted or converted to the tool tip in a more effective manner, in particular compared to those tool tips that include such a threaded section for connecting the tool tip to the moving part. In particular, the tool avoids a threaded section that usually extends in the vibration direction, in particular at the front end of the tool tip, away from the tip of the instrument tool tip, i.e. at the proximal end of the tool tip, as in the prior art. In particular, it can be provided that the tool has an engagement section between the tool tip and the moving part, said engagement section being free of a screwing mechanism. In particular, the tool tip and the moving part form an angle in the engagement section, i.e. in the section that is connected to each other. In particular, the angle between the extension direction of the tool tip and the moving part is the result of the formation of the joint, rather than the result of the route of the moving part or the tool tip itself. In particular, the moving part itself represents an ultrasonic generator or a horn, or is at least connected to the ultrasonic generator or a horn, for example, by a screwing mechanism. In addition, preferably, the tool is arranged for external treatment, in particular for the outer surface of the tooth, and / or in particular, the tool tip performs a flexural movement rather than a rotational movement. In a vibrating state, the tool tip performs a flexural movement, for example, in particular in a plane extending along the extension direction of the tool tip and perpendicular to the cross-section of the tool tip. For example, the vibration performed by the tool tip is very small. For example, the amplitude is less than 100 μm (maximum displacement peak). In a non-vibrating state, no vibration is transmitted to the tool tip, but preferably, the tool tip is connected to the moving part. In particular, in the joint section, in a non-vibrating state, i.e. when the tool tip is connected to the moving part and is not excited to vibrate, the tool tip extends along an extension direction inclined relative to the vibration direction.

[0013] Preferably, the tool is a dental treatment tool for removing tartar and / or surface treatment of teeth, in particular subgingival and / or supragingival. Such a tool may be a curettage. Preferably, the tool tip is positioned next to or close to tartar during operation for removing tartar by external treatment of one or more teeth. For example, the vibration source, in particular the ultrasonic vibration source, which causes the vibration movement of the moving part comprises a piezoelectric element which causes a flexural movement of the moving part along the vibration direction. Preferably, the vibration source implements an ultrasonic movement which causes an effective and harmless way of removing tartar from the teeth.

[0014] In addition, since the vibration source can be sized smaller, the size of the handpiece can be reduced by using the engagement section as described above. Therefore, a tool that is easier for the operator to manipulate can be provided. In particular, since the ultrasonic vibration source can be sized smaller than those tools known in the prior art in order to have the same efficiency, the size of the tool can be reduced. This is another benefit of making the energy transfer between the moving part and the tool tip more efficient. In addition to the curettage for removing dental calculus, other examples may be medical tools for cutting tissue, bone and / or teeth.

[0015] In particular, it can be provided that the connection between the moving part and the tool tip is watertight in order to avoid water jets having a spiral shape.

[0016] Furthermore, it can preferably be provided that the vibration direction corresponds primarily to the longitudinal direction of the handpiece, i.e. the direction along which the handpiece extends. It can preferably be provided that the mobile part has a first length measured between a proximal front end connected to the vibration source and a distal front end opposite the (ultrasonic) vibration source. In particular, the tool tip has a third length that is smaller than the first length.

[0017] Preferably, at least in the non-operating state, the tool tip is non-bent, i.e. the tool tip has no bends or arcuate sections. For example, the tool tip is formed as a needle and / or has a straight overall path. Preferably, the tool tip has a substantially straight path along its entire extension, at least over 76% of its entire extension. In particular, in the case of a curettage, the tool tip avoids bends or arcuate sections. Thus, materials for the tool tip that cannot be bent and that have not been used for conventional curettage tips known in the prior art can be advantageously used. This makes the material selection for the tool tip more flexible and allows materials that have advantages for removing stones but have not been used in the past because they could not be bent correctly. Preferably, the moving part extends straight along the vibration direction, i.e. also without bends or arcuate sections. Thus, bent sections at the ends of the moving part are avoided.

[0018] Thus, a handpiece that is too large in terms of weight and size can be avoided. Due to the reduced weight of the tool, the likelihood of the operator developing musculoskeletal disorders can be advantageously reduced. Furthermore, it has been shown that an excessively large diameter or size of the handpiece can prompt the operator to apply excessive forces to the teeth and thus cause iatrogenic damage. This can be avoided by reducing the size of the handpiece, which is allowed by a more efficient transfer of energy from the moving part to the tool tip.

[0019] Specifically, the relatively large first length allows the distal front end portion of the moving part facing away from or opposite to the ultrasonic vibration source to be placed as close to the tooth as possible. This further reduces energy loss during operation. In addition, since complex bending methods and cutting mechanisms can be avoided, the manufacturing process of the tool tip can be advantageously simplified.

[0020] Preferably, it can be provided that, in the operating state and / or in the mounted state, the tool tip reaches into and / or penetrates through a recess of the moving part. In particular, the moving part comprises, in particular at its distal front end, more precisely at the end located opposite to the vibration source, a recess or an opening into which the tool tip can be inserted for mounting. Preferably, the moving part has a recess which is inclined relative to the vibration direction. In particular, the recess is oriented such that the recess defines the orientation of the extension direction of the tool tip in the mounted state, i.e. in the mounted state, the general course of the tool tip infers the general course of the recess. Preferably, the proximal end of the tool tip forming the insertion section is configured for being inserted into the recess and, for example, penetrates through a recess in the moving part, preferably in the form of a hole or an opening such as a through hole or a blind hole, so that in particular the proximal end of the tool tip is flush with the outer surface of the moving part in the mounted state, in particular opposite to the pointed tip of the tool tip or at the proximal end of the tool tip.

[0021] In a preferred embodiment, it can be provided that, in the operating state, the tool tip is connected to the mobile part by a friction connection and / or by a form-fit connection without a screwing mechanism. Preferably, the tool tip is connected to the mobile part by a press-fit connection. In addition, it is conceivable that the strength of the press-fit connection defines whether the tool tip can be removed or is permanently connected to the mobile part. It is even conceivable that the coupling section comprises a bayonet lock for connecting the tool tip and the mobile part. It is also conceivable that the interior of the recess has a groove, which allows a form-fit connection to be established between the tool tip and the mobile part, in particular in a direction parallel to the extension direction. In an alternative embodiment, it is even conceivable that an additional mounting element such as a screw is provided for insertion into the mobile part, so that the mounting element supports the fixing of the tool tip to the mobile part by acting on the tool tip, in particular on the inserted section or the insertion section of the tool tip.

[0022] Preferably, it can be set that:

[0023] - the tool tip is replaceable or permanently attached to the moving part, and / or

[0024] - The moving part is either replaceable or permanently connected to the ultrasound source of the handpiece.

[0025] In the case of a permanent connection, it is possible to avoid an unsuitable tool tip being connected to the mobile part. This reduces the likelihood of damage to the tooth during operation. In addition, the handpiece, in particular the ultrasonic vibration source, can advantageously be adapted to the specific design of the tool tip. Thus, it is possible to avoid the handpiece being too large and the ultrasonic motor, for example in the form of a piezoelectric transducer, can be designed to be smaller. This therefore has a direct impact on the ergonomic benefits for manipulating the tool and improves the comfort of the operator. As a result, less iatrogenic damage is produced at the tooth. In the case of a replaceable or replaceable tool tip and / or mobile part, it is advantageous to only remove the tool tip, in particular when the tool tip is worn after multiple uses. Thus, the handpiece and / or the mobile part only need to be sterilized for the next treatment.

[0026] In addition, it can be provided that the tool tip has a polygonal cross section in a plane perpendicular to the extension direction and / or tapers along the extension direction of the tool tip. The pointed tip caused by the tapered design of the tool tip in particular allows improved removal of tartar during operation. Preferably, the ratio between the lengths of the tapered sections of the tool is between 0.5 mm and 10 mm, preferably between 1 mm and 6 mm, and more preferably between 2 mm and 4 mm. In addition, it can be provided that the tool tip has at least one polygonal, for example rectangular, cross section in the insertion section, which is inserted into the recess in the installed state. Therefore, a key lock system that only allows a specific type of tool tip to be inserted into the recess can be implemented. Therefore, the handpiece can be personalized for a specific type or a specific kind of tool tip, thereby allowing the handpiece to be optimized for a specific type, preferably with respect to its size, in particular the ultrasonic vibration source.

[0027] Preferably, the moving part has a tapered section with a reduced diameter measured in a plane perpendicular to the vibration direction, in particular a reduced diameter compared to the diameter of the moving part adjacent to the vibration source. Such a tapered section is preferably arranged in close proximity to a recess for receiving the tool tip in the mounted state. The tapered section concentrates the translation of the vibration movement to a junction section connecting the tool tip and the moving part. The ratio of the length of the tapered section of the moving part to the first length, i.e. the total length of the moving part, is between 0.0125 and 0.3, preferably between 0.031 and 0.15 and most preferably between 0.05 and 0.10.

[0028] In particular, it can be provided that the moving part comprises a cylindrical section in the engagement section, wherein the cylindrical section comprises a recess for receiving the tool tip. In other words: the distal end of the moving part, in particular the sonotrode of the transducer, is formed as a cylindrical section. In the installed state, the axis of symmetry of such a cylindrical section is oriented parallel to and preferably concentric with the extension direction of the recess or the non-bent tool tip. In addition, it is conceivable that, in addition to the cylindrical section at the distal end of the moving part, the moving part also comprises a shaft section. The shaft section preferably has a reduced cross section in a direction perpendicular to the vibration direction. For example, the shaft section is formed by two flat surfaces parallel to each other. During the insertion of the tool tip into the recess, the parallel surfaces simplify the handling, because the moving part can be gripped in a simpler way. The ratio of the distance between the two parallel surfaces is less than the outer diameter of the cylindrical section. In particular, the ratio of the distance to the outer diameter is between 0.5 and 0.9, preferably between 0.6 and 0.8, and more preferably between 0.7 and 0.78. Such an elongated shaft section reduces the possibility that the shaft blocks the observation of the tool tip, in particular the treatment area, during operation. In addition, the configuration of the cylindrical section and the shaft section can be simply manufactured by milling. The shaft section preferably extends to the handpiece, i.e., extends to the area outside the shell forming the handpiece. Another benefit of the cylindrical section is that any lateral mode of connection is avoided, and thus better control of the vibration direction is guaranteed. Since the operator can directly see the tip, the operator can directly know the vibration direction. Therefore, a safer treatment of the patient can be guaranteed, thereby achieving low-invasive treatment and less pain or no pain.

[0029] In particular, it can be provided that the moving part comprises a spherical or cylindrical section in the engagement section, wherein the spherical section comprises a recess for receiving the tool tip. By using the spherical section, damage to the inside of the oral cavity can be advantageously avoided. In addition, the spherical section again increases the diameter of the moving part along the vibration direction at its front, and the spherical section is located opposite to the ultrasonic vibration source. In particular, reducing the diameter of the moving part, in particular reducing the diameter of the moving part at the rear end of the moving part, i.e. the end located opposite to the vibration source, reduces the weight of the moving part. In particular, the results show that the cylindrical shape or the rear end or the moving part improves ergonomics and tool tip fixation.

[0030] In another embodiment, it can be provided that the moving part is made of titanium, preferably the ultrasonic horn is titanium (Ti6L4V) or aluminum (7075T6). Thus, the material used is lighter than the counterweight (stainless steel), has high elastic properties, good sound propagation (high resonator behavior, high quality factor) and rapidity compatible with the ceramic and base mass materials used. The materials used need to be biocompatible, in particular the fluid channels and / or the external contacts need to be biocompatible. For the tool tip, mainly hard biocompatible materials (hard stainless steel (hardened, high-temperature alloys, duplex...), ceramics (Al2O3, ZRO2, Si3N4), metal ceramics (WC and other carbides) and / or glass metals (amorphous metals) can be used. In addition, it can be provided that the angle between the vibration direction of the moving part and the extension direction of the tool tip is between 90° and 150°, preferably between 100° and 140°, and most preferably between 110° and 130°. Thus, the requirements for the instrument tip, in particular for the scraper, caused by the patient's oral cavity are established.

[0031] In another embodiment, it can be provided that the ratio between the second length, measured in the vibration direction, assigned to the vibration source and the first length, measured in the vibration direction, assigned to the moving part is between 0.025 and 0.5, preferably between 0.04 and 0.13, and most preferably between 0.05 and 0.1. Thus, a short and compact tool that is easy for the operator to handle can be advantageously provided. In particular, the first length L1 depends on the frequency and the transducer configuration, and for example for titanium material, the first length L1 has a value between 20 mm and 80 mm, preferably between 30 mm and 70 mm, and more preferably between 40 mm and 60 mm. Furthermore, it is preferred that the second length L2 has a value between 1 mm and 15 mm, preferably between 2 mm and 8 mm, and most preferably between 3.5 mm and 7.5 mm.

[0032] In particular, it can be provided that the moving part of the handpiece is a multi-part system. This configuration allows the removal or replacement of the entire section comprising the tool tip and the moving part, i.e. the tool tip and the moving part can be removed or replaced, whereby the handpiece comprising the ultrasonic vibration source can be used multiple times. In particular, the moving part and the handpiece are connected to each other in another joint section.

[0033] Another subject of the invention is a tool tip for a tool according to the invention. All benefits and features mentioned in the context of the tool apply analogously to the tool tip and vice versa.

[0034] Another subject of the invention is a handpiece and / or a mobile part of a tool according to the invention. All benefits and features described in the context of the tool apply analogously to the handpiece and the mobile part and vice versa.

[0035] Another object of the present invention is a method for manufacturing a handpiece and / or a moving part and / or a tool tip including a joint section of a tool according to the present invention. All features described in the context of the tool are similarly applicable to the method and vice versa.

[0036] Where not expressly described, the various embodiments or their various aspects and features may be combined or exchanged with one another, without limiting or expanding the scope of the described invention, as long as such combination or exchange makes sense and is within the meaning of the invention. Where applicable, the advantages described with respect to one embodiment of the invention are also advantages of other embodiments of the invention.

[0037] In the attached picture:

[0038] Figure 1 schematically illustrates a tool for medical treatment according to a first preferred embodiment in a side view,

[0039] Figure 2 The present invention schematically illustrates a device including a handpiece in a three-dimensional view. Figure 1 tools for medical treatment,

[0040] Figure 3 Another side view schematically illustrates a handpiece. Figure 1 tools for medical treatment,

[0041] Figure 4 The side view schematically illustrates a handpiece Figure 1 tools for medical treatment,

[0042] Figure 5 The side view schematically illustrates the Figure 1 A joint section of a tool for medical treatment,

[0043] Figure 6 Schematically illustrates in cross section a moving part for a tool according to a second preferred embodiment,

[0044] Figure 7 The diagram schematically illustrates the Figure 6 The moving part,

[0045] Figure 8 is a tool tip of a preferred embodiment of the present invention,

[0046] Fig. 9is a detailed view of the recess and outlet passage of the moving part, and

[0047] Fig.10 The figures schematically illustrate the distal end of a tool according to a third preferred embodiment of the present invention in three viewing angles, and

[0048] Fig.11 Schematically shows the process for producing Fig.10 Manufacturing steps of the moving part of the tool.

[0049] exist Figure 1 Schematically shows a tool 1 for medical treatment according to a first preferred embodiment in a side view. In particular, Figure 1 A tool 1 for dental treatment, in particular a curettage for removing dental calculus, is illustrated. Such a tool 1 uses a vibration motion, in particular an ultrasonic vibration motion, for moving the tool tip 20 so that the tool tip 20 located at or near the dental calculus of the tooth removes the dental calculus from the treated tooth during operation. Preferably, the tool 1 comprises a vibration source 30, in particular an ultrasonic vibration source, which is intended to cause an ultrasonic vibration motion along a vibration direction VD. In particular, the vibration source 30 comprises at least one piezoelectric element 31. These piezoelectric elements 31 are generally configured so that electrical energy can be converted into a small extension of the piezoelectric element 31 in the vibration direction VD, which small extension produces an ultrasonic vibration motion.

[0050] In particular, it can be provided that the tool 1 further comprises a moving part 10 and a tool tip 20. In particular, the moving part 10 represents an ultrasonic generator or a horn. Figure 1 , which interacts with the surface of the tooth, in particular the outer side of the tooth, during treatment. In particular, the tool tip 20 is formed as a non-bent component. In other words: the tool tip 20 is in the form of a needle, i.e. the tool tip 20 has a straight course from the insertion section inserted into the recess 17 in the engagement section 15 along the extension direction ED to the pointed tip or distal end 6 of the tool tip 20. Therefore, the tool tip 20 differs from the curettage tips known from the prior art, which are usually curved in order to meet the requirement that the rear end (seen from the vibration source) or the distal end of the tool tip 20 needs to extend at an angle W of approximately 120° relative to the vibration direction VD, in particular in order to meet the requirement defined by the geometry of the oral cavity.

[0051] However, instead of using a screwing section that allows the tool tip 20 to be connected to the mobile part 10 by a screwing mechanism, according to Figure 1The embodiment shown can provide that the tool tip 20 is connected to the mobile part 10 in the engagement section 15, in particular without a screwing mechanism. Preferably, the tool tip 20 is connected to the mobile part 10 in the engagement section 15, in particular without a screwing mechanism, by a friction fit and / or a form fit. In particular, the tool tip 20 is connected to the engagement section 15 of the mobile part 10 by a press-fit connection. For example, depending on the strength of the press-fit, the tool tip 20 is permanently or non-permanently arranged or connected to the mobile part 10.

[0052] Furthermore, it can be provided that the tool tip 20 is inserted into the recess 17, wherein the recess 17 is included in the moving part 10. Therefore, the tool tip 20 extends in the joint section 15 along the extension direction ED which is inclined with respect to the vibration direction VD. The results show that by connecting a non-bent tool tip 20 to the moving part 10 so that the tool tip 20 extends obliquely with respect to the vibration direction VD of the moving part 10, the vibration movement can be transmitted from the moving part 10 to the tool tip 20 in a more effective manner compared to those scrapers having a screwing section for screwing the tool tip 20 to the moving part 10 of the tool.

[0053] Another benefit of using a non-curved, i.e. needle-shaped, tool tip 20 is that it is possible to rely on new or different materials that, for example, cannot be bent in a manner sufficient to achieve a curved tool tip 20 in the form of a curettage known from the art. Preferably, the extension direction ED and the vibration direction VD of the tool 1 with a non-curved tool tip 20 form an angle W that corresponds mainly to 120°, in order to meet the requirements defined by the geometry of the oral cavity.

[0054] Preferably, it can be provided that the tool 1 has a first length L1 measured along the vibration direction VD between the front end of the vibration source 30 and the front end of the mobile part 10 facing away from the vibration source 30. Due to the connection by press fit in the joint section 15, a third length L3 of the tool tip 20 along the extension direction ED and / or a second length L2 of the vibration source 30 along the vibration direction VD can be reduced. Therefore, the front end of the mobile part 10 facing away from the vibration source 30 can be positioned closer to the tooth during treatment. This makes the energy transfer for removing calculus more effective.

[0055] Preferably, the ratio of the second length L2 to the first length L1 is between 0.025 and 0.5, preferably between 0.04 and 0.13, and more preferably between 0.05 and 0.1. Specifically, the first length L1 depends on the frequency and the transducer configuration, and for example for titanium material, the first length L1 has a value between 20mm and 80mm, preferably between 30mm and 70mm, and more preferably between 40mm and 60mm. In addition, preferably, it can be provided that the second length L2 has a value between 1mm and 15mm, preferably between 2mm and 8mm, and most preferably between 3.5mm and 7.5mm. Preferably, the third length L3 depends on the application. For example, for a universal tip (subgingival and supragingival), the third length is 20mm, but the third length can be longer or shorter depending on the application, for example, shorter (about 14mm) for a supragingival tip of high amplitude. Furthermore, by reducing the second length L2, in particular compared to the first length L1, it is advantageously possible to produce a more compact and smaller handpiece 40 for the tool 1, which handpiece 40 allows for easier manipulation by an operator.

[0056] exist Figure 2 In the figure, a perspective view is shown including a handpiece 40. Figure 1 Tool 1 for medical treatment. As illustrated, the mobile part 10 passes through a hole in the region of the rear end of the handpiece 40. In particular, it can be provided that the handpiece 40 at least partially surrounds the mobile part 10 of the tool 1. For example, it is also conceivable that the mobile part 10 is a multi-part system with a further joining section 15' which allows at least a part of the mobile part 10 to be removed from another section permanently connected to the vibration source 30.

[0057] also, Figure 2 , a needle-shaped, non-bent tool tip 20 is shown tapering toward its distal end 6. Furthermore, it can be preferably provided that the tool tip 20 has a polygonal cross section in a plane perpendicular to the extension direction ED. For example, the cross section has a rectangular form. Furthermore, it can be provided that at the rear end of the tool tip 20, i.e. the proximal end 4 of the tool tip 20, the tool tip 20 has an insertion section. The insertion section is used to be inserted into the recess 17 of the mobile part 10 in the installed state, so that the tool tip 20 is connected to the mobile part 10 by a press fit.

[0058] Preferably, the engagement section 15 is configured as a lock and key principle, which allows only those tool tips 20 which have the same cross section in the insertion section corresponding to the shape of the recess 17 of the mobile part 10 to be connected to the recess 17, in particular in the engagement section 15. Furthermore, it can be provided that the recess 17 is a part of a section 13 of the mobile part 10 which forms a rear end of the mobile part 10, in particular facing away from the ultrasonic source 30. Furthermore, an additional opening 19 is provided at the front end of the mobile part 10 facing away from the ultrasonic vibration source 30. Such an additional opening 19 allows access, in particular visual access, to the insertion section of the tool tip 20 inserted into the recess 17. Thus, when the tool tip 20 is, for example, color-coded, it is possible to identify the tool tip 20 used, so that it can be visually recognized whether the appropriate tool tip 20 is correctly arranged in the recess. Alternatively or additionally, the opening 19 may be used to fasten or fix the tool tip 20 to the moving part 10 , or a press-fit connection may be supported by additional means for fixing, such as, for example, screws passing through the opening 19 .

[0059] exist Figure 3 Another side view is shown in FIG. Figure 1 The tool 1 for medical treatment in FIG. Specifically, the moving part 10 is shown to have a tapered section 12, which is preferably located close to the spherical or cylindrical section 13. This design of the moving part 10, especially at the rear end of the moving part 10 (seen from the vibration source 30), allows the vibration movement caused by the vibration source 30 to be concentrated to the engagement section 15, for the most efficient transfer of the motion energy from the moving part 10 to the tool tip 20.

[0060] exist Figure 4 In the figure, a side view is shown including a handpiece 40. Figure 1 The tool 1 for medical treatment is shown as follows. The handpiece 40 tapers from the proximal end to the distal end along the vibration direction VD.

[0061] exist Figure 5 In the figure, a side view is shown in detail. Figure 1The invention relates to a tool 1 for medical treatment of a device 1 for medical treatment. Specifically, it can be provided that the tool tip 20 passes through a recess 17 included in a spherical or cylindrical section 13 at the rear end of the moving part 10. Specifically, it can be provided that the recess 17 is inclined relative to the vibration direction VD and defines the direction of the tool tip 20, that is, the extension direction ED of the tool tip 20 inserted into the recess 17. In addition, it can be provided that the tool tip 20 includes a fluid channel 11 located inside the moving part 10, which preferably allows the fluid to be delivered from the handpiece 40 to an outlet 14 located, for example, in the engaging section 15 of the tool 1 or another outlet (not shown) located at the distal end 6 of the tool tip 20. Specifically, the outlet 14 is positioned close to the recess 17, or even a part of the recess 17, which is used to connect the tool tip 20 to the moving part 10 by press fitting.

[0062] exist Figure 6 , a moving part 10 for a tool 1 according to a second preferred embodiment is schematically shown in a cross-sectional view. Figure 6 The moving part 10 shown in FIG. Figures 1 to 5 The main difference of the moving part 10 of the tool 1 shown in is the use of a cylindrical part 13 forming the rear end of the moving part 10. Furthermore, it can be provided that the fluid channel 11 is larger than the outlet channel 18. In particular, the cross section of the fluid channel 11 measured in a plane perpendicular to the flow direction is at least twice as large, preferably at least three times as large, and most preferably at least four times as large as the cross section A of the outlet channel 18 measured in a plane perpendicular to the flow direction.

[0063] Figure 7 The diagram shows two perspectives Figure 6 The moving part 10. In particular, the cylindrical part 13 of the moving part 10 comprises a recess 17 for receiving the tool tip 20. In particular, the perspective in the following figure shows both the recess 17 and the outlet channel 18 in a top view.

[0064] Figure 8 The figures in different perspectives show the tool tip 20 of the moving part 10 according to the first or second embodiment of the invention. In particular, it can be provided that the tool tip 20 is at least partially formed by a straight tool tip 20 or a needle.

[0065] Fig. 9 A detailed view of the outlet 14 and recess 17 of the moving part 10 is shown. Specifically, Fig. 9 The cross section A of the outlet channel 18 of the moving part 10 is shown. In particular, the cross section A of the outlet opening 14 and / or the outlet channel 18 is smaller than 0.8 mm. 2 Or at 0.05mm 2 With 0.78mm2 Between, preferably between 0.05mm 2 With 0.39mm 2 Between, and most preferably between 0.05 mm 2 With 0.15mm 2 between or even about 0.1 mm 2 .

[0066] exist Fig.10 , the distal end of the tool 1 according to the third preferred embodiment is illustrated in three views. The third embodiment corresponds essentially to Figure 6 and Figure 7 The second preferred embodiment shown in . In particular, the moving part 10 of the tool 1 includes a cylindrical section 13 at its distal end. In addition, the moving part 10 includes a shaft section 45. The shaft section 45 extends at least half of the interval between the cylindrical section 13 and the housing 41 of the handpiece. The shaft section 45 preferably has a reduced cross-section and more preferably includes two flat surfaces 48 that are parallel to each other and spaced apart from each other by a distance d1. Specifically, the ratio of the distance d1 to the outer diameter d2 of the cylindrical section of the moving part 10 is between 0.5 and 0.9, preferably between 0.6 and 0.8, and more preferably between 0.7 and 0.78. Such an elongated shaft section 45 reduces the possibility that the moving part 10 blocks the operator from observing the tool tip 20, especially the treatment area and the vibrating tool tip 20 during operation.

[0067] Fig.11 Shown for production Fig.10 The manufacturing steps of the moving part 10 of the tool 1 are as follows. Specifically, in the case of a configuration having a shaft section 45 and a cylindrical section 13 at the distal end of the moving part 10, a corresponding outer contour of the moving part 10 can be produced at the distal end of the moving part 10 using a machining process such as milling. Therefore, parallel-oriented flat surfaces 48 and a cylindrical section 13 having a symmetry axis parallel to an axis inclined by about 120° relative to the vibration direction VD and / or parallel to the recess 17 for receiving the tool tip 20 or the extension direction ED of the tool tip 20 can be produced in a simple manner. In particular, the manufacturing process can be simplified and accelerated, and thus the cost for manufacturing the moving part 10 can be reduced. In fact, Fig.11 The circles in the figure illustrate the Fig.10 The milling tool 47 is adapted to be milled to the contour of the moving part 10. In particular, it can be provided that the milling tool 47 is oriented at approximately 120° relative to the extension direction of the rod to be machined to form the moving part 10. By a relative translational movement along a corresponding path (during a rotational movement of the milling tool for machining), the orientation of the cylindrical section 13 is automatically produced. And the end section of the shaft section 45 is correspondingly tilted.

[0068] Reference numerals

[0069] 1 Tools

[0070] 4 Proximal end

[0071] 6 Distal end

[0072] 10 Moving Parts

[0073] 11 Fluid Channel

[0074] 12 Tapered section

[0075] 13 Spherical or cylindrical segments

[0076] 14 Exit

[0077] 15 Joint section

[0078] 15' Another joint section

[0079] 17 recess

[0080] 18 Exit Channel

[0081] 19 Opening

[0082] 20 Tool tip

[0083] 30 Vibration Source

[0084] 31 Piezoelectric element

[0085] 40 Handpiece

[0086] 41 Shell

[0087] 45 Shaft section

[0088] 47 Milling tools

[0089] 48 Flat Surface

[0090] d1 distance

[0091] d2 outer diameter

[0092] VD Vibration direction

[0093] ED extension direction

[0094] W angle

[0095] L1 First Length

[0096] L2 Second length

[0097] L3 Third length

Claims

1. A tool for medical treatment (1), comprising: - a handpiece (40) having a vibration source (30), - a mobile part (10) which, in a vibrating state, performs a vibrating movement along a vibrating direction (VD), and - a tool tip (20) connected to the moving part (10) at a joining section (15), wherein the engagement section between the tool tip and the moving part has no screwing mechanism, wherein, in a non-vibrating state, the tool tip (20) extends in the engagement section (15) along an extension direction (ED) that is inclined relative to the vibration direction (VD) of the moving part, and The movable part (10) is configured to be connected to the ultrasonic generator or horn of the handpiece by a screwing mechanism, and the tool tip (20) is configured to be connected to the movable part (10) by a friction connection and / or by a form-fit connection.

2. The tool (1) according to claim 1, wherein: At least in the non-operating state, the tool tip (20) is non-bent.

3. The tool (1) according to claim 1 or 2, wherein: In an operating state, the tool tip (20) reaches into the recess (17) of the moving part (10) and / or penetrates through the recess (17) of the moving part (10).

4. The tool (1) according to claim 1 or 2, wherein: - the tool tip (20) is replaceable or permanently connected to the mobile part (10), and / or The mobile part (10) is an ultrasound source (30) which is replaceable or permanently connected to the handpiece (40).

5. The tool (1) according to claim 1 or 2, wherein: The tool tip (20) - has a polygonal cross section in a cross section perpendicular to said extension direction (ED), and / or - tapering along the extension direction (ED) of the tool tip (20).

6. The tool (1) according to claim 1 or 2, wherein: The moving part (10) comprises a tapered section (12) having a decreasing diameter measured in a plane perpendicular to the vibration direction (VD).

7. The tool (1) according to claim 3, wherein: The moving part (10) comprises a cylindrical section (13) in the engagement section (15), wherein the cylindrical section comprises the recess (17) for receiving the tool tip (20).

8. The tool (1) according to claim 1 or 2, wherein: The moving part (10) is made of titanium.

9. The tool (1) according to claim 1 or 2, wherein: The angle (W) between the vibration direction (VD) of the moving part (10) and the extension direction (ED) of the tool tip (20) is between 90° and 150°.

10. The tool (1) according to claim 1 or 2, wherein: The ratio of a second length (L2) assigned to the vibration source (30) measured in the vibration direction (VD) to a first length (L1) assigned to the mobile part (10) measured in the vibration direction (VD) is between 0.025 and 0.

5.

11. The tool (1) according to claim 1 or 2, wherein: The moving part (10) of the handpiece (40) is a multi-part system.

12. The tool (1) according to claim 1 or 2, wherein: The tool is a tool for dental treatment.

13. The tool (1) according to claim 1 or 2, wherein: The moving part (10) performs ultrasonic movement along the vibration direction (VD) in the vibration state.

14. The tool (1) according to claim 1 or 2, wherein: The tool tip (20) is a scraper tip.

15. The tool (1) according to claim 1, wherein: The friction connection is a press-fit connection.

16. The tool (1) according to claim 1 or 2, wherein:The angle (W) between the vibration direction (VD) of the moving part (10) and the extension direction (ED) of the tool tip (20) is between 100° and 140°.

17. The tool (1) according to claim 1 or 2, wherein: The angle (W) between the vibration direction (VD) of the moving part (10) and the extension direction (ED) of the tool tip (20) is between 110° and 130°.

18. The tool (1) according to claim 1 or 2, wherein: The ratio of a second length (L2) assigned to the vibration source (30) measured in the vibration direction (VD) to a first length (L1) assigned to the mobile part (10) measured in the vibration direction (VD) is between 0.04 and 0.

13.

19. The tool (1) according to claim 1 or 2, wherein: The ratio of a second length (L2) assigned to the vibration source (30) measured in the vibration direction (VD) to a first length (L1) assigned to the mobile part (10) measured in the vibration direction (VD) is between 0.05 and 0.

1.

20. A tool tip (20) for a tool (1) according to any one of claims 1 to 19.

21. A handpiece (40) and / or a mobile part (10) of a tool (1) according to any one of claims 1 to 19.

22. A method for manufacturing a handpiece (40) and / or a moving part (10) and / or a tool tip (20) comprising an engagement section (15) of a tool (1) according to any one of claims 1 to 19.

23. The method according to claim 22, wherein: The method includes milling a shaft section (45) and a barrel section.

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