Surgical instrument and surgical instrument assembly for use in dental sugery, oral surgery and / or oral and maxillofacial surgery

Abstract

The invention relates to a surgical instrument (10) for use in dental surgery, oral surgery and / or oral and maxillofacial surgery, wherein the instrument (10) has an interface (16) for connecting the instrument (10) to a dental contra-angle (14) or handpiece (12), by means of which interface the instrument (10) can be connected to a dental contra-angle (14) or handpiece (12) in such a way that the instrument (10) can be driven by the contra-angle (14) or handpiece (12) in a rotating movement about an axis of rotation (X), wherein the instrument (10) has furthermore a drum-like main body (18), wherein a collecting chamber (20) for collecting bone chips is formed in the interior of the main body (18), wherein the drum-like main body (18) has a lateral surface (22), (24) facing radially outwards with respect to the axis of rotation (X), wherein the instrument (10) has a blade for removing bone chips and an opening (26) which is arranged and designed in such a way that bone chips removed by the blade (24) can penetrate through the opening (26) into the collecting chamber (20), characterized in that the blade (24) and in particular the opening are arranged on the lateral surface (22) of the main body (18).

Description

[0001] Surgical instrument and surgical instrument arrangement for use in dental, oral and / or maxillofacial surgery.

[0002] Description

[0003] The invention relates to a surgical instrument for use in dental, oral, and / or oral, maxillofacial, and facial surgery, as well as a surgical instrument arrangement for use in dental, oral, and / or oral, maxillofacial, and facial surgery.

[0004] In the aforementioned areas of dentistry, the need to reconstruct lost jawbone regularly arises. This procedure, also known as jawbone augmentation, involves the regeneration of jawbone. First, bone material is introduced into the area of ​​the jaw where bone regeneration is desired.

[0005] The current medical gold standard is the so-called shell technique developed by Professor Dr. Fouad Khoury. In this technique, a container is first created using thin bone shells. These bone shells are then fixed to the desired position in the existing jawbone using bone screws. The space between the bone shells, or the interior of the "bone container," is typically filled with bone chips.

[0006] For bone material, the patient's own, so-called autologous bone currently represents the medical gold standard. Instruments have already been developed for harvesting bone shells from the patient's own bone, such as the "Microsaw" by Khoury or the "Easy Bone Collector" by Zastrow. However, these instruments are essentially suitable for obtaining relatively solid bone shells.

[0007] The bone chips used to fill the cavities are currently usually harvested using hand-held scraping instruments. Such instruments are available on the market, for example, under the name "Safescraper".

[0008] Harvesting bone chips using such hand instruments is comparatively time-consuming and laborious. In particular, it places considerable physical strain on the surgeon. At the same time, however, the bone chips are essential for the formation of new bone in the jaw area where bone augmentation is to take place. The introduction of the bone chips delivers large quantities of potent, vital bone cells, platelets, and healing-promoting proteins to the augmentation area. Simultaneously, the volume of the bone regeneration process is stabilized. While the bone shells in the shell technique essentially serve as an external mechanical barrier, the bone chips placed in the cavity between the bone shells play a crucial role in the biological processes of bone formation.

[0009] The TW M 484410 U is a surgical instrument that can be driven in a rotating motion around an axis of rotation. On a surface facing the axis of rotation, the instrument has blades that can be used to remove bone chips. The chips can collect in a chamber inside the instrument. They can be removed through an opening in the instrument's outer surface. A disadvantage of this type of instrument is that relatively large wounds are created when the bone is exposed for its use, and the removal of the chips results in the creation of circular, deep defects in the bone, similar to actual drilling.The invention is based on the objective of demonstrating a surgical instrument and a surgical instrument arrangement that enable the surgeon to obtain bone material in the form of bone chips in a way that is comfortable for the surgeon and gentle for the patient.

[0010] The problem is solved by a surgical instrument and a surgical instrument arrangement having the features of the independent claims. The features of the dependent claims relate to advantageous embodiments.

[0011] The surgical instrument has an interface for connecting it to a dental angled or handpiece. This interface allows the instrument to be connected to a dental angled or handpiece in such a way that the instrument can be driven by the angled or handpiece in a rotating motion around a rotational axis.

[0012] The interface can be a shank, in particular an FG shank, RA shank, HP shank, or HPT shank. These shanks are well-suited for connection to dental angled or handpieces, as such angled or handpieces often have compatible mechanical interfaces for connecting the respective angled or handpiece to a corresponding shank.

[0013] The instrument features a drum-shaped base. Inside this base is a collection chamber for bone chips. This drum-like design, with its integrated collection chamber, offers the advantage of providing a sufficiently large area for collecting the bone chips. This allows for the continuous collection of a significant quantity of bone chips without interrupting the process to remove them. Performing the collection process with as few interruptions as possible for removing the collected bone chips from the instrument shortens the overall procedure, resulting in a gentler and ultimately more cost-effective treatment for the patient.

[0014] The drum-shaped base body has a lateral surface that extends radially outwards with respect to the axis of rotation. This lateral surface is a consequence of the drum-shaped base body, in which the axis of rotation is located in the center of the drum-shaped base body, thus forming a rotational symmetry axis with respect to the basic shape of the base body.

[0015] The drum-shaped base body connects in particular to the interface for connecting the instrument to the angled or handpiece. Especially when the interface is designed as a shaft, the axis of rotation can form an extension of the interface.

[0016] The instrument features a blade for removing bone chips and an opening. The blade is specifically a plane blade. The blade and opening are arranged and designed in such a way that bone chips removed by the blade can pass through the opening into the collection chamber.

[0017] This can be achieved, in particular, by having the opening extend along the cutting edge of the blade. In this context, the opening can especially have an elongated shape. The blade itself can, in particular, form part of the edge of the opening. Such a design or arrangement of the opening facilitates the penetration of bone chips into the collection chamber.

[0018] The blade can be formed integrally with the instrument body. In this case, the blade primarily forms the edge of the opening. Alternatively, the blade can also be attached to the instrument body. This allows for greater flexibility in terms of manufacturing and material selection for both the blade and the instrument body. The blade attached to the instrument body is specifically fixed to the body at the edge of the opening.

[0019] The blade can have a rake angle of at least 000° and at most 045°, a wedge angle of at least 030° and at most 090° and / or a clearance angle of at least 000° and at most 045° when referred to a plane tangential to the lateral surface.

[0020] The problem is solved, in particular, by positioning the blade on the outer surface of the base body. In this context, the opening through which the bone chips can enter the collection chamber can also be located on the outer surface of the base body. This placement on the outer surface of the base body allows for a more patient-friendly removal of the bone chips.

[0021] To reach the bone with the instrument's outer surface, the patient's tissue covering the bone needs to be opened less extensively than with conventional instruments where the blades are oriented along the axis of rotation. Furthermore, attaching the blade to the outer surface allows for a comparatively shallow, even, and therefore gentle removal of bone, whereas conventional, driven instruments create comparatively deep grooves in the bone.

[0022] The instrument can have multiple blades for removing bone chips and openings. These can be arranged on the outer surface of the instrument body, particularly at regular intervals around its circumference. The blades and openings can be arranged and designed such that bone chips removed by one of the blades can enter the collection chamber through one of the openings. Furthermore, the instrument body can have at least one additional opening, and in particular multiple additional openings, especially on its outer surface. These openings have a smaller cross-section than the opening for the entry of bone chips into the collection chamber and serve to allow fluids, such as blood and / or a cooling medium, to escape from the collection chamber during use of the instrument.

[0023] The lateral surface of the base body has, in particular, the shape of a circular cylindrical surface. The resulting geometry, with a lateral surface running parallel to the axis of rotation, represents, geometrically speaking, the ideal realization of a drum-shaped base body. Particularly with regard to adapting the instrument to specific applications, drum-shaped base bodies with a lateral surface that deviates geometrically from this ideal type would also be possible. For example, the lateral surface could also have a conical shape, such that its circumference increases or decreases, particularly along a direction parallel to the axis of rotation. The lateral surface of the base body could accordingly have the shape of a truncated cone.

[0024] The instrument can have a removal opening at its end pointing away from the cutting point along the axis of rotation for extracting bone chips from the collection chamber. Removing the bone chips from the collection chamber through an opening located at the end pointing away from the cutting point is advantageous with regard to the accessibility of the collection chamber. Removing the bone chips from the collection chamber in a direction parallel to the axis of rotation, in conjunction with the blade positioned on the outer surface, allows for a spatial separation of chip removal and chip extraction with respect to the instrument body. In this way, a design optimized for the respective process can be implemented at the corresponding location on the instrument body.The blade, with the path of its cutting edge, and / or the opening, with its principal direction of extension, can run at an angle of at least 0° and / or at most 45° to a direction parallel to the axis of rotation along the lateral surface. Due to the curvature of the lateral surface, the local path at any given position along the circumference of the lateral surface must be considered.

[0025] The surgical instrument arrangement for use in dental, oral, and / or maxillofacial surgery comprises an instrument as described above and a dental angled handpiece. The instrument is connected to the dental angled handpiece in such a way that the instrument can be driven by the handpiece in a rotating motion around an axis of rotation. Such a surgical instrument arrangement allows the surgeon to use the instrument with optimal tactile control.

[0026] The instrument assembly may include a removal element that is positioned in the instrument's collection chamber during use and can be removed from the instrument. The use state of the instrument assembly refers in particular to the state it is in when bone chips are being removed. The removal element is designed such that bone chips can be extracted from the collection chamber by removing the removal element from the instrument.

[0027] In other words, such a sampling element essentially acts as a "carrier" for the bone chips when they are removed from the instrument. Due to the very small size of the bone chips, their removal is significantly simplified by such a sampling element, thus considerably increasing the instrument's practical value. A reduction in the sampling time is particularly beneficial when removing larger quantities of bone chips, where the collection chamber is filled and emptied several times. The patient's discomfort is significantly reduced due to the shorter procedure time.

[0028] In practical application of the instrument arrangement, the extraction element can be replaced with another extraction element when removing bone chips from the collection chamber. The surgeon can then continue the bone chip removal process with the instrument arrangement, which is back in its working state after the insertion of the additional extraction element, while simultaneously, in a parallel workflow, the already extracted bone chips can be separated from the extraction element.

[0029] The extraction element may have a closing area for sealing the extraction opening, which, in the instrument assembly's operating state, seals the extraction opening to prevent bone chips from escaping the collection chamber. The closing area may, in particular, be disc-shaped. For example, the closing area may be a circular disc. The closing area extends, in particular, with its principal directions of extension perpendicular to the axis of rotation. In the instrument assembly's operating state, the closing area is positioned such that it seals the opening at the end of the base body that points away from the interface along the axis of rotation.

[0030] By incorporating such a sealing area on the extraction element, the drum-shaped base can be easily closed to prevent the unwanted escape of chips. Simultaneously, removal of the extraction element is straightforward, as the necessary opening of the normally closed opening occurs automatically when the extraction element is removed, eliminating the need for a separate step. The extraction element can also feature a guide area to assist in removing bone chips from the instrument.Such a collection area particularly helps to ensure that, when the extraction element is removed from the instrument, the bone chips are removed from the collection chamber as completely as possible, along with the extraction element, and do not remain there.

[0031] The collection area can, for example, be disc-shaped and / or extend with its main directions of extension perpendicular to the axis of rotation when the instrument is in use. In this way, when the extraction element is removed, the collection area can, in particular, represent a kind of barrier that moves through the instrument, pushing the bone chips ahead of it and thus ensuring or supporting their collection by the extraction element.

[0032] The collection area can be connected to the closure area, in particular via a connecting area. This connecting area can be, in particular, an elongated, for example, rod-shaped, section. The extraction element can thus have a spindle-like shape, especially with the connecting area located between the closure area and the collection area acting as a "spindle axis." Such a design, particularly due to the comparatively small volume of the connecting area, also has the advantage that the extraction element only minimally reduces the space available for the accumulation of bone chips in the collection chamber.

[0033] In the instrument's operating state, the collection area is located specifically at the end of the drum-like base body furthest from the extraction opening. This arrangement of the collection area means that, when the extraction element is removed, it must move, at least approximately, through the entire base body. This ensures that the collected bone chips are collected as completely as possible.

[0034] The instrument assembly can include a tissue protection element that partially surrounds the instrument's body, such that the outer surface of the body is accessible for bone chip removal from a first direction perpendicular to the angled or handpiece and the axis of rotation, and is at least partially shielded from this first direction by the tissue protection element. Such a tissue protection element can, in particular, prevent unintended injuries to the patient's soft tissue caused by the rotating instrument, especially by the instrument's blade.

[0035] The tissue protection element can be attached to the angled or handpiece. For this purpose, the tissue protection element can, in particular, have a clamping contour adapted to the outer contour of the handpiece or angled piece, allowing the tissue protection element to be clamped and / or clipped onto the handpiece or angled piece. This makes it particularly easy to remove and attach the tissue protection element to the angled or handpiece.

[0036] The tissue protection element can be easily and quickly removed from the base body, particularly for the purpose of extracting bone chips. This is especially advantageous when the tissue protection element surrounds not only the outer surface but also the end of the base body furthest from the cutting site. This allows for even better soft tissue protection without unduly complicating the bone chip extraction process.

[0037] The material used for the tissue protection element can be a metallic material, such as steel or a titanium alloy, or a plastic, such as a transparent plastic. The latter material facilitates visual inspection during instrument use. All of the aforementioned materials share the characteristic of possessing the necessary elasticity to allow the tissue protection element to be clamped onto the handpiece or contra-angle.

[0038] The instrument assembly may also include a cooling device for cooling the instrument with a cooling medium. Due to friction during the removal of bone chips, the instrument can heat up, which can damage the organic tissue that comes into contact with the instrument. To counteract this, the instrument can be cooled with a cooling medium using a cooling device.

[0039] The instrument assembly may, in particular, include a supply device for delivering the cooling medium into a space located between the instrument and the tissue protection element. The supply device may, for example, be integrated into the angled or handpiece. Alternatively and / or additionally, such a supply device may be attached to the angled or handpiece. The supply device includes, in particular, a line by which the cooling medium is delivered from a reservoir to the instrument. In this context, the line may consist of multiple sections made of different materials; optionally, the cooling device may also include a pump. This pump may be arranged along the line.

[0040] In this context, the supply device may also include a reservoir containing a cooling medium. The cooling medium may, for example, be a sterile liquid. This liquid may be, in particular, a physiological saline solution or water prepared for injection. The supply device directs the cooling medium, in particular, into a space located between the instrument and the tissue protection element. For this purpose, the line may, in particular, be arranged such that it terminates in a space located between the instrument, especially the instrument body, and the tissue protection element.

[0041] The instrument arrangement can be designed such that the extraction element is held in the instrument by means of the tissue protection element when the instrument is in use. In particular, if the tissue protection element also at least partially surrounds the instrument at its end pointing away from the interface in an axial direction relative to the axis of rotation, the tissue protection element can advantageously be used as a fixation for the extraction element.

[0042] The instrument arrangement is designed in such a way that, when the tissue protection element is attached to the angled or handpiece, the tissue protection element engages with the removal element in such a way that the removal element is fixed in the instrument in its position that determines the instrument's position for use. Alternatively or additionally, the instrument arrangement is designed in such a way that, when the tissue protection element is removed from the angled or handpiece, the tissue protection element disengages from the removal element in such a way that the removal element can be removed.

[0043] In particular, the extraction element can be mounted on the fabric protection element in a manner that allows it to rotate axially around the axis of rotation and about the axis of rotation relative to the fabric protection element. This mounting can be achieved, in particular, by having a projection of the extraction element rest against the fabric protection element, especially engaging in a complementary recess of the fabric protection element, or by having a projection on the fabric protection element rest against the extraction element, especially engaging in a corresponding complementary recess of the extraction element.

[0044] The projection can be rounded, for example, spherical. This provides a rotatable bearing and, in particular, simultaneously a centering mechanism. The projection and, in particular, the recess can be located along the axis of rotation.

[0045] This design allows for easy exchange of the extraction elements for removing bone chips from the instrument. When removing the tissue protection element from the angled or handpiece, the projection and recess must be disengaged simultaneously. After replacing the extraction element and before resuming bone chip removal, the tissue protection element is reattached to the angled or handpiece. Care must be taken to ensure that the extraction element is properly secured by the tissue protection element. The instrument arrangement can be designed such that, due to elastic deformation, particularly of the tissue protection element, an axial force (relative to the axis of rotation) is exerted on the extraction element via the projection and recess during use. This axial force is preferably very low, resulting in minimal friction.The slight preload acting in the instrument arrangement ensures that the extraction element is securely held in the instrument during use.

[0046] Further practical embodiments and advantages of the invention are described below in connection with the drawings. They show:

[0047] Fig. 1 shows a schematic representation of an exemplary surgical procedure.

[0048] Instrument arrangement with a dental handpiece, Fig. 2 a schematic representation of an exemplary instrument arrangement with a dental contra-angle handpiece,

[0049] Fig. 3 is a schematic exploded view of the exemplary instrument arrangement from Figure 2,

[0050] Fig. 4 shows an exemplary surgical instrument for use as part of a surgical instrument arrangement according to one of Figures 1 to 3.

[0051] Fig. 5 shows a detailed representation of an exemplary fabric protection element for an instrument arrangement according to one of Figures 2 or 3,

[0052] Fig. 6 shows a further detailed representation of an exemplary surgical instrument for use in one of the exemplary instrument arrangements according to Figures 1 to 3.

[0053] The instrument arrangements schematically depicted in Figures 1 to 3 for use in dental, oral, and / or maxillofacial surgery each comprise a surgical instrument 10 for use in dental, oral, and / or maxillofacial surgery. In the case of the example shown in Figure 1, the surgical instrument arrangement further comprises a dental handpiece 12. The instrument 10 is connected to the dental handpiece 12 in such a way that the instrument 10 can be driven by the handpiece 12 in a rotary motion about a rotational axis X. In the case of the example shown in Figures 2 and 3, the surgical instrument arrangement further comprises a dental contra-angle handpiece 14.The instrument 10 is connected to the dental contra-angle handpiece 14 such that the instrument 10 can be driven by the contra-angle handpiece 14 in a rotary motion about an axis of rotation X. In the examples shown, the instrument 10 has an interface 16. As in the example shown, the interface can be a shaft. The instrument 10 can be connected to a dental handpiece 12 or a dental contra-angle handpiece 14 via the interface 16 such that the instrument 10 can be driven by the handpiece 12 or the contra-angle handpiece 14 in a rotary motion about the axis of rotation X.

[0054] The exemplary instrument 10 further comprises a drum-shaped base body 18. Inside the base body 18, a collection chamber 20 is formed for collecting bone chips. The drum-shaped base body 18 has a lateral surface 22 that extends radially outwards with respect to the axis of rotation X.

[0055] The instrument 10 further comprises a blade 24 for removing bone chips. The blade 24 can, in particular, be a plane blade, as shown in the example. The instrument 10 also has an opening 26. The opening 26 is arranged and designed such that bone chips removed by the blade 24 can enter the collection chamber 20 through the opening 26. As shown in the examples, the opening 26 can extend along the blade 24. In the example shown, the opening 26 extends along the cutting edge 28 of the blade 24. As shown in the example, the blade 24 itself can form part of the edge of the opening 26.

[0056] The blade 24 can, in particular, be formed in one piece, as in the examples shown in Figures 4 and 6.

[0057] As can be seen particularly in Figure 6, the blade can have a rake angle of at least 000° and at most 045°, a wedge angle of at least 030° and at most 090°, and / or a clearance angle of at least 000° and at most 045°, relative to a plane tangential to the lateral surface. The blade 24 is arranged on the lateral surface 22 of the base body 18. The lateral surface 22 of the base body 18 can, as in the example shown, have the shape of a lateral surface of a circular cylindrical body.

[0058] As can be seen in the example shown, particularly in Figure 6, the instrument 10 can have a removal opening 30 at its end pointing away from the interface 16 along the axis of rotation X for removing bone chips from the collection chamber 20. The cross-section of the removal opening 30 can, in particular as in the illustrated example, correspond to the cross-section of the collection chamber 20. This ensures good accessibility of the collection chamber 20 for easy removal of the bone chips.

[0059] As can be seen in the example shown, particularly in Figure 4, the blade 24 can extend with its cutting edge 28 parallel to the axis of rotation X. Similarly, the opening 26 can also extend with its main direction of extension parallel to the axis of rotation X.

[0060] The instrument arrangement, as exemplified in particular in Figures 1 to 3, includes in particular a removal element 32 which, in a state of use of the instrument arrangement, is located in the collection chamber 20 and can be removed from the instrument 10. The removal element 32 is designed, in particular as in the example shown, such that bone chips can be removed from the collection chamber 20 by removing the removal element 32 from the instrument 10.

[0061] As in the example shown, the dispensing element 32 can have a closing area 34 for closing the dispensing opening 20. The closing area 34 can be disc-shaped, as in the example shown. In particular, the closing area 34 can extend in a plane perpendicular to the axis of rotation X, as shown by way of example, when the dispensing element 32 is located in the collecting chamber 20. As in the example shown, the closing area 34 can have its outer contour adapted to the dispensing opening 30. Furthermore, the dispensing element 32 can have a drive area 36, ​​as in the example shown. The drive area 36 can be disc-shaped, as in the example shown. The drive area 36 can extend in a plane perpendicular to the axis of rotation X, as shown by way of example. As can be seen particularly in Figure 3, the drive area 36 can have an outer contour that corresponds to the inner contour of the collecting chamber 20.is adapted to the inner contour of the base body 18 that defines the collection space 20.

[0062] As shown in the example, the carrying area 36 can be connected to the closing area 34 via a connecting area 38. The removal element 32 can have a spindle-shaped design, as shown in the example. The connecting area 38 is, in particular, rod-shaped or bar-shaped, as illustrated by example.

[0063] The instrument arrangement may further include a tissue protection element 40. The tissue protection element 40, in particular as shown in the illustration, partially surrounds the base body 18 of the instrument 10, such that the outer surface 22 of the base body is accessible for bone chip removal from a first direction Y, perpendicular to the axis of rotation X and relating to the contra-angle handpiece 14 or the handpiece 12, and is shielded from this first direction Y by the tissue protection element 40. As in the example shown, a portion of the tissue protection element 40 can be adapted to the contra-angle handpiece 14 or the handpiece 12, so that the tissue protection element 40 can be easily attached to the contra-angle handpiece 14 or the handpiece 12.

[0064] As in the illustrated example, the instrument arrangement can include a cooling device for cooling the instrument 10 with a cooling medium. In particular, the instrument arrangement can include a supply device 42 for supplying the cooling medium into a space arranged between the instrument 10 and the fabric protection element 40. The exemplary supply device 42, in the form of a tube passing through the fabric protection element 40, is shown in particular in Figure 5.

[0065] As in the example shown, the instrument arrangement 32 can be designed such that the extraction element 32 is held in the instrument 10 by means of the tissue protection element 40 when the instrument arrangement 32 is in use. In particular, as in the example shown, the extraction element 32 can be mounted on the tissue protection element 40 so as to be axially and rotatably about the axis of rotation X relative to the tissue protection element 40. This can be achieved, as in the example shown, by a rounded projection 44 which, when the instrument arrangement 32 is in use, projects in the region of the axis of rotation X in the direction of the tissue protection element 40 and bears against it.

[0066] The base body 18 can have at least one further opening 46 in the area of ​​the outer surface, as shown in Fig. 6, which improves the outflow of liquids such as blood or cooling medium from the collection chamber 20.

[0067] The features of the invention disclosed in this description, in the drawings, and in the claims can be essential for realizing the invention in its various embodiments, both individually and in any combination. The invention is not limited to the described embodiments. It can be varied within the scope of the claims and taking into account the knowledge of the person skilled in the art. Reference numerals list

[0068] 10 surgical instruments

[0069] 12 Handpiece

[0070] 14 Elbow piece

[0071] 16 Interface

[0072] 18 basic shapes

[0073] 20 Collection room

[0074] 22 Surface area

[0075] 24 blades

[0076] 26 Opening

[0077] 28 cutting edge

[0078] 30 extraction opening

[0079] 32 Extraction element

[0080] 34 Closure area

[0081] 36 Carpool area

[0082] 38 Connection area

[0083] 40 fabric protection element

[0084] 42 Feeding device

[0085] 44 lead

[0086] 46 more openings

[0087] X axis of rotation

[0088] Y direction

Claims

Patent claims 1. Surgical instrument (10) for use in dental, oral, and / or maxillofacial surgery, wherein the instrument (10) has an interface (16) for connecting the instrument (10) to a dental angled (14) or handpiece (12), by means of which the instrument (10) can be connected to a dental angled (14) or handpiece (12) in such a way that the instrument (10) can be driven by the angled (14) or handpiece (12) in a rotating motion about an axis of rotation (X), wherein the instrument (10) further has a drum-shaped base body (18), wherein a collection chamber (20) for collecting bone chips is formed inside the base body (18), wherein the drum-shaped base body (18) has a lateral surface (22) (24) extending radially outwards with respect to the axis of rotation (X),wherein the instrument (10) has a blade for removing bone chips and an opening (26) which is arranged and designed such that bone chips removed by the blade (24) can enter the collection chamber (20) through the opening (26), characterized in that the blade (24) and in particular the opening is arranged on the lateral surface (22) of the base body (18).

2. Instrument according to claim 1, characterized in that the lateral surface (22) of the base body (18) has the shape of a lateral surface of a circular cylindrical body.

3. Instrument according to claim 1 or 2, characterized in that the instrument (10) has a removal opening (30) at its end pointing away from the interface (16) along the axis of rotation (X) for removing bone chips from the collection chamber (20).

4. Surgical instrument arrangement for use in dental, oral, and / or maxillofacial surgery, comprising an instrument (10) according to one of the preceding claims and a dental angled (14) or handpiece (12), wherein the instrument (10) is connected to the dental angled or handpiece in such a way that the instrument (10) can be driven by the angled (14) or handpiece (12) in a rotating motion about a rotational axis (six).

5. Instrument arrangement according to claim 4, characterized in that the instrument arrangement has a removal element (32) arranged in the collection chamber (20) in a state of use of the instrument arrangement and removable from the instrument (10), which is designed such that bone chips can be removed from the collection chamber (20) by removing the removal element (32) from the instrument (10).

6. Instrument arrangement according to claim 5, characterized in that the extraction element (32) has a, in particular disc-shaped, closure area (34) for closing the extraction opening (30), which closes the extraction opening (30) in the operating state of the instrument in order to prevent bone chips from escaping from the collection chamber (20).

7. Instrument arrangement according to claim 5 or 6, characterized in that the extraction element (32) has a drive area (36) which is connected, in particular via a connecting area (38), to the closure area (34) and / or which, in the operating state of the instrument (10), is arranged in the area of ​​the end of the drum-like base body (18) facing away from the extraction opening (30) to assist in the transport of the Bone chips are present through the extraction element when the extraction element (32) is removed from the instrument (10).

8. Instrument arrangement according to one of claims 4 to 7, characterized in that the instrument arrangement has a tissue protection element (40), in particular attached to the angled (14) or handpiece (12), which partially surrounds the base body (18) of the instrument (10), so that the lateral surface (22) of the base body (18) is accessible for the removal of bone chips from a first direction (Y) relating to the angled (14) or handpiece (12) and perpendicular to the axis of rotation (X), and is at least partially shielded from a direction opposite to this first direction by the tissue protection element (40).

9. Instrument arrangement according to one of claims 5 to 8, characterized in that the instrument arrangement has a cooling device for cooling the instrument (10) with a cooling medium, in particular wherein the instrument arrangement has a supply device (42) for supplying the cooling medium into an intermediate space arranged between the instrument and the tissue protection element.

10. Instrument arrangement according to claim 8 or 9, characterized in that the instrument arrangement is designed such that the extraction element (32) is held in the instrument (10) by means of the tissue protection element (40) in the operating state of the instrument arrangement, in particular the extraction element (32) can be mounted axially and rotatably about the axis of rotation (six) relative to the tissue protection element (40) on the tissue protection element (40). * * * * * * *

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