Spacer for an endodontic instrument

Abstract

Spacer (100) for an endodontic instrument (10) comprising: a base (12) with a diameter (d G ), a cover surface (14) with a diameter (d D ), where the diameter (d D ) is smaller than the diameter (d G ), a rotation axis (16), a lateral surface (18), a height (h), an opening (20) with a longitudinal axis for receiving an endodontic instrument (10) and a cylindrical recess (22) for receiving a stopper (24) on the base surface (12), wherein the spacer (100) is conical, and wherein the opening (20) extends from the base surface (12) to the top surface (14), wherein the longitudinal axis of the opening (20) is arranged coaxially to the rotation axis (16) of the spacer (100), and wherein the cylindrical recess (22) is arranged coaxially to the opening (20).

Description

[0001] The invention relates to a spacer for an endodontic instrument, for example, for a root canal instrument. The invention further relates to a device for providing such spacers. The invention also relates to a kit for use during endodontic treatment comprising the spacer and the device according to the invention.

[0002] Endodontic instruments, such as files and reamers, including hand and rotary instruments, are commonly used to clean and widen the root canal of infected teeth. In the treatment of diseased root canals, the pulp tissue is removed to gain access to the apical end of the tooth in order to completely remove bacteria.

[0003] A common problem in dental treatment is the inaccurate adherence to the working length of the instruments. However, in root canal treatment, it is crucial that the endodontic instruments are only inserted into the respective root canal to a precisely defined maximum penetration depth. This prevents over-instrumentation, the spread of bacteria, pain, and other complications during treatment.

[0004] Various methods exist to determine the length of a tooth's roots or canals; for example, root canal length can be measured using special measuring needles and an X-ray, or with an electronic measuring device. This is necessary to ensure that treatment reaches the root tip.

[0005] This determined maximum penetration depth is conventionally set using a stop ring that is attached to the instrument. The stop ring is made of an elastic plastic, such as silicone, and has a central bore into which the instrument is inserted. The stop ring is also called a silicone stopper or simply a stopper.

[0006] According to the prior art, a stopper is slid onto the instrument, specifically onto a reference point in the area of ​​the tooth crown. This reference point is also referred to as the coronal reference point. To precisely adjust the position of the stop ring on the respective instrument, a variety of different devices are known from the prior art.

[0007] From DE 24 16 275 C2 and DE 34 34 786 C2, for example, measuring gauges are known which have a length scale and a recess at a well-defined location into which the stopper can be inserted. The instrument can then, if this has not already been done, be passed through the central bore of the stop ring and moved in the direction of extension of the instrument, whereby the stopper remains stationary relative to the length scale of the measuring gauge.

[0008] A disadvantage of this method is that the instrument must be manually pushed through the stopper until the desired position and file length are reached. This results in a certain degree of inaccuracy and insufficient reproducibility of the maximum penetration depth, which should be measurable to within a quarter of a millimeter.

[0009] From DE 199 16 114 A1, a setting gauge for adjusting the depth stop is known, in which the instrument is pushed through the stopper until it reaches an adjustable stop. This achieves increased reproducibility of the set length.

[0010] From JP 10 085 243 A, US 3,938,253 and US 4,028,810, an adjustment device is known in which the maximum penetration depth of the root canal file can be adjusted by means of a stop adjustable via a threaded rod. This allows for better length adjustment.

[0011] The aforementioned devices use conventional silicone stoppers. These stoppers have the disadvantage that, due to their flexible material, they can slip during treatment, leading to a change in the maximum penetration depth. This often results in over-instrumentation during root canal treatment.

[0012] US patent 5,154,611 discloses a dispenser for silicone stoppers that holds silicone stoppers of varying lengths. These can be pushed onto an endodontic instrument until the handle stops, thus creating a defined file length. While this eliminates the problem of slippage, such dispensers do not meet the requirement of sterility.

[0013] Furthermore, it is possible that several root canals may need to be cleaned during a dental treatment, requiring the instrument to be adjusted to different maximum penetration depths. For this, the stopper is moved manually. This has several disadvantages, such as contamination of the instruments and the risk of injury from moving the stopper. This can prolong treatments that are uncomfortable or painful for the patient.

[0014] All devices and methods known from the prior art for determining, setting, and maintaining the exact position of a stop ring on the endodontic instrument during treatment therefore have numerous disadvantages.

[0015] Based on this, the object of the present invention is to provide a device with which the disadvantages described above in the prior art can be overcome.

[0016] According to the invention, the problem is solved by a spacer for an endodontic instrument comprising: a base surface with a diameter (d G ), a cover surface with a diameter (d D ), where the diameter (d D ) is smaller than the diameter (d G), an axis of rotation, a lateral surface, a height (h), an opening with a longitudinal axis for receiving an endodontic instrument and a cylindrical recess for receiving a stopper on the base surface, wherein the spacer is conical, and wherein the opening extends from the base surface to the top surface, wherein the longitudinal axis of the opening is arranged coaxially to the axis of rotation of the spacer, and wherein the cylindrical recess is arranged coaxially to the opening.

[0017] The spacer according to the invention makes it possible to precisely and reproducibly determine the instrument length of the endodontic instruments during endodontic treatment. In other words, a limit is provided that accurately defines the penetration depth of the instrument and prevents it from changing unintentionally during treatment.

[0018] For this purpose, during endodontic treatment, the endodontic instrument is first inserted into the opening of the spacer according to the invention, up to the distal end of the handle of the endodontic instrument. In other words, the spacer is pushed until it reaches the stop of the handle of the endodontic instrument, so that the top surface of the spacer rests against the handle, while the base of the spacer rests on the crown of the tooth during treatment.

[0019] According to the invention, the spacer can be designed with different heights. By selecting the height of the spacer, a maximum working length or maximum penetration depth of the endodontic instrument is precisely determined before treatment. Thus, correspondingly short working lengths are achieved with greater heights, while correspondingly longer working lengths can be achieved with lesser heights.

[0020] The invention prevents the stopper from slipping, leading to over-instrumentation as is known from the prior art, because the endodontic instrument can only be inserted into the tooth by the remaining length adjoining the spacer.

[0021] The invention also offers the advantage that, due to the conical shape of the spacer, quick replacement of the spacers during treatment is possible. This is particularly necessary when a new or further penetration depth needs to be set.

[0022] Firstly, the spacer is larger than conventional stoppers, making it easier for a treating dentist to detach the spacer from the endodontic instrument.

[0023] Furthermore, it is advantageous that removing the spacer from the endodontic instrument also always releases the stopper (if present) from the instrument.

[0024] According to the invention, an "endodontic instrument" is understood to be any instrument used in endodontic treatment, in particular K-files, reamers, and Hedström files made of Cr-Ni stainless steel. All lengths, thicknesses, dimensions, tolerances, and minimum requirements for mechanical strength are defined in the ISO standard. The diameter at the instrument tip corresponds to a size of 1 / 100 mm. The length of the tapered working portion is 16 mm, regardless of the overall instrument length. All instruments have a tapered working portion that increases in diameter by 0.02 mm per millimeter, meaning the instruments are 0.32 mm thicker at the end of the working portion. Newer nickel-titanium instruments, in addition to the 0.2 mm taper, also have more steeply tapered instrument shapes: e.g., 0.4 mm, 0.6 mm, 1.0 mm, and 1.2 mm. To facilitate instrument use, the instrument handles are color-coded.

[0025] According to the invention, an “endodontic instrument” also includes a dental drilling instrument.

[0026] According to the invention, a "stopper" is understood to be a ring made of a suitable material, preferably plastic or rubber, which can be fitted around the endodontic instrument in a form-fitting manner. These are also referred to as silicone stoppers, endo stoppers, or endo stops. Such stoppers are known in the prior art and are commonly used in endodontic treatment. These stoppers are available in various sizes, with the usual size having a diameter of 3.5 mm and a thickness / height of 1 mm.

[0027] According to the invention, the opening for receiving an endodontic instrument is designed such that the opening has a diameter at least as large as the cross-section of the endodontic instrument which is inserted into the opening.

[0028] According to the invention, the opening can be a circular bore. According to the invention, the opening can also have other shapes, for example triangular, square, or polygonal.

[0029] According to a preferred embodiment of the spacer according to the invention, the cylindrical recess for receiving a stopper has a volume that corresponds to the volume of a stopper.

[0030] This embodiment has the advantage that already known, established techniques can be combined with the invention. For this purpose, the spacer according to the invention has a cylindrical recess into which a stopper can be received without gaps or in a form-fitting manner. This embodiment also offers the advantage that a stopper can additionally fix the spacer to the endodontic instrument.

[0031] According to a preferred embodiment of the spacer according to the invention, the cylindrical recess for receiving a stopper has a diameter of 2.0 mm to 5.0 mm, preferably 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, or 5.0 mm.

[0032] In a further embodiment of the spacer according to the invention, the cylindrical recess for receiving a stopper has a height of 0.5 mm to 2.0 mm, preferably 0.5, 1.0, 1.5 or 2.0 mm.

[0033] The stoppers known in the prior art have different heights / thicknesses and different diameters. These embodiments therefore offer the advantage that any stopper can be combined with the spacer according to the invention.

[0034] According to a preferred embodiment of the spacer according to the invention, the diameter (d) G) at 5.0 mm to 15.0 mm, preferably at 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5 or 15.0 mm.

[0035] According to the invention, the diameter of the base corresponds approximately to the diameter of the crown or restoration of the tooth being treated. The diameter is selected such that the spacer rests on the respective tooth crowns. A diameter that is too small can result in the spacer not resting on the tooth crown, but instead, for example, in the tooth fissures. A diameter that is too large can result in the spacer resting on adjacent teeth of the tooth being treated. Therefore, incorrectly selected diameters can lead to incorrect treatment.

[0036] According to the invention, a dentist undergoing treatment has numerous spacers of various sizes available to him during the procedure. A person skilled in the art will be able to select a suitable spacer depending on the condition of the tooth being treated.

[0037] According to a preferred embodiment of the spacer according to the invention, the height (h) is approximately 0.75 mm to approximately 15 mm, preferably approximately 0.75, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0 or approximately 15.0 mm.

[0038] The height of the spacer determines the maximum penetration depth of the endodontic instrument during tooth treatment. According to the invention, a dentist has various spacers of different heights available to adjust the exact working length of the endodontic instrument.

[0039] To enable precise adjustment of the working length, the spacer can be supplemented according to the invention by additional discs with an opening for receiving endodontic instruments. These discs serve to fine-tune the size of the spacer beyond its height (h).

[0040] These discs can have a height of ≤ 0.5 mm. Possible thicknesses / heights are approximately 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, or 0.5 mm. During processing, these discs can be positioned either against the base or the top surface of the spacer.

[0041] In addition to the discs, according to the invention several spacers can also be pushed one after the other onto the endodontic instrument in order to be able to set the desired or exact working length.

[0042] This embodiment offers the advantage that any working size of the endodontic instrument can be set; either by using a spacer of a defined height, or a combination of several spacers, or a combination of spacers and additional discs.

[0043] According to a preferred embodiment of the spacer according to the invention, the opening for receiving an endodontic instrument has a diameter (d O ) of ≤ 2.0 mm, preferably approx. 2.0, 1.9, 1.8, 1.7, 1.6, 1.5, 1.4, 1.3, 1.2, 1.1, 1.0, 0.9, 0.8, 0.75, 0.7, 0.65, 0.6, 0.55, 0.5, 0.45, 0.4, 0.35, 0.3, 0.25, 0.2 or approx. 0.15 mm.

[0044] Endodontic instruments are typically offered in different thicknesses or diameters. This is necessary because root canals also have different diameters.

[0045] This design has the advantage that all endodontic instruments can be combined with the spacer according to the invention.

[0046] According to a preferred embodiment of the spacer according to the invention, the diameter (d) D ) at 2.5 mm to 15.0 mm, preferably at 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 9.0, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, 14, 14.5 or 15.0 mm.

[0047] This design has the advantage that the spacer is not significantly larger than the tooth being treated. This allows the dentist a good view of the tooth being treated.

[0048] Preferably, the spacer is made of a dimensionally stable material. Furthermore, the material should be chemically inert and retain its shape at high temperatures and pressures. This is particularly advantageous because it allows for easy sterilization of the spacer. Additionally, the material should be inert to bacteria, viruses, and fungi.

[0049] According to a preferred embodiment of the spacer according to the invention, the spacer is made of metal, plastic, silicone, or a combination thereof, preferably PEEK (polyetheretherketone), PPSU, POM-C or stainless steel.

[0050] This design offers the advantage that all materials are easily sterilizable. This allows the spacers to be reused multiple times, which in turn can lead to cost savings.

[0051] Furthermore, the materials offer the advantage that the spacer can be cast during manufacturing, which enables cost-effective production.

[0052] According to a preferred embodiment of the spacer according to the invention, the spacer has a marker indicating the height (h).

[0053] According to the invention, markers are understood to be all indications that can quickly and reliably show a treating physician the height of the respective spacer.

[0054] Such markers can be printed; for example, the respective heights can be printed on the spacer in numbers or graphics. Furthermore, the height information can also be engraved or stamped. According to the invention, the height can also be indicated by a color code. In this case, the spacers can be colored differently depending on the height or be made of a colored material.

[0055] Color coding has become common for endodontic instruments, so marking by means of colors is a preferred embodiment.

[0056] According to the invention, the problem is further solved by a device for providing the spacer according to the invention comprising: a body which has at least one recess for at least partial positive locking reception of the spacer.

[0057] The spacer can be quickly and securely inserted into this device and, if necessary, removed again. The spacer can also be inserted and clamped into this device even when it is attached to an endodontic instrument. The endodontic instrument can then be safely detached from the spacer according to the invention and, if necessary, inserted into another spacer with different dimensions. This allows for quick and safe replacement of the spacer on the endodontic instrument.

[0058] A particularly advantageous feature of the device according to the invention is that the dentist being treated can place the spacer onto the endodontic instrument and, if necessary, change it during endodontic treatment without having to handle the spacer. In the prior art, this regularly leads to unwanted contamination, as the dentist has to manually move the originally sterilized stopper.

[0059] The recess of the device according to the invention is advantageously designed such that the spacer can be easily inserted into the device and can become wedged in it. It is particularly preferred if the recess is designed such that the spacer can only be inserted into and removed from the device in a lateral direction and not perpendicularly upwards or downwards.

[0060] According to the invention, the device can have several recesses, e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, etc. In this embodiment, for example, several spacers of different sizes can be stored in the respective recesses of the device. This has the advantage that the dentist can quickly change the spacer on the endodontic instrument.

[0061] According to a preferred embodiment of the device, the recess is cone-shaped or pyramid-shaped.

[0062] This embodiment offers the advantage that the spacer can be inserted precisely into the device, since the device is designed in a conical shape.

[0063] According to a further preferred embodiment of the device, the at least partially positive-locking receptacle is designed such that the spacer sits in a clamping connection in the at least one recess.

[0064] This embodiment has the advantage that the spacer can be inserted laterally into the device, specifically into the recess. The spacer then wedges itself in place, preventing it from shifting in other directions, such as upwards or downwards.

[0065] According to another embodiment of the device, it has a slit-shaped opening in the base of the body extending towards the edge of the body, which is designed to receive an endodontic instrument.

[0066] According to a further embodiment of the device, the slit-shaped opening has a diameter of ≤ 2.0 mm, preferably of approximately 2.0, 1.9, 1.8, 1.7, 1.6, 1.5, 1.4, 1.3, 1.2, 1.1, 1.0, 0.9, 0.8, 0.75, 0.7, 0.65, 0.6, 0.55, 0.5, 0.45, 0.4, 0.35, 0.3, 0.25, 0.2 or approximately 0.15 mm.

[0067] These designs have the advantage that the spacer is usually inserted into the device in conjunction with an endodontic instrument. The slit-shaped opening therefore allows for easy and safe replacement of the spacer from the endodontic instrument.

[0068] According to the invention, the slit-shaped opening is designed in such a way that an endodontic instrument has sufficient space in the slit-shaped opening and is not trapped like the spacer itself.

[0069] According to the invention, the problem is further solved by a kit for use during endodontic treatment, comprising a device and a spacer according to the invention.

[0070] According to one embodiment of the kit, the kit includes a disc for fine magnification of the spacer, the disc having a height of ≤ 0.5 mm.

[0071] Further advantages will become apparent from the figures and the following description of preferred embodiments.

[0072] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0073] Exemplary embodiments of the invention are shown in the drawings and are explained in more detail below. They show: Fig. 1 a side view of a spacer according to the invention; Fig. 2 a side view of an endodontic instrument extending into a tooth and having a spacer to limit the depth of penetration; Fig. 3 a side view of an endodontic instrument extending into a tooth and having a spacer to limit the penetration depth and an additional disc; Fig. 4 a perspective view of the device according to the invention; Fig. 5 a side view of a section of a device according to the invention; and Fig. 6 a side view of a section of a device according to the invention with a spacer according to the invention and an endodontic instrument.

[0074] Functionally equivalent elements are identified with the same reference numerals in all figures, even in different embodiments.

[0075] Fig. Figure 1 shows a spacer 100 according to the invention for an endodontic instrument 10. The spacer 100 is conical in shape and has an axis of rotation 16. The spacer 100 is characterized in that it has a base 12, a top surface 14, a lateral surface 18 and a height h. The top surface 14 is smaller than the base 12.

[0076] Furthermore, the spacer 100 has an opening 20 for receiving an endodontic instrument 10, the opening 20 extending from the base surface 12 to the top surface 14. The opening 20 also has a longitudinal axis, the longitudinal axis of the opening 20 being arranged coaxially with the axis of rotation 16 of the spacer 100.

[0077] Furthermore, the spacer 100 has a cylindrical recess 22 for receiving a stopper 24 on the base 12, wherein the cylindrical recess 22 is arranged coaxially to the opening 20.

[0078] According to the invention, the spacer 100 can be designed with variable dimensions. This is advantageous because the spacer 100 is selected depending on the tooth being treated and, in particular, its root length. Variable dimensions include the diameter of the base 12, the diameter of the top surface 14, the diameter of the opening 20, the diameter of the cylindrical recess 22, as well as the height h of the spacer 100 and the height of the cylindrical recess 22.

[0079] The spacer 100 is preferably made of materials that are easy to sterilize, dimensionally stable and chemically inert.

[0080] According to the invention, the spacer 100 can have markers indicating the height of the spacer 100 (not shown). This can be achieved, for example, by color coding on the spacer 100 or by completely coloring the spacer 100.

[0081] Fig. Figure 2 shows a side view of an endodontic instrument 10 which extends into a tooth 26 and has a spacer 100 limiting the penetration depth.

[0082] As from Fig. As can be seen in Figure 2, the endodontic instrument 10 has an elongated shape. It consists of a handle 28 and a treatment head 30, which is usually the drill head or file. The endodontic instrument 10 extends in the Fig. 2 into the root canal of tooth 26 to the apical end of tooth 26.

[0083] The spacer 100 is arranged such that the base surface 12 rests against the crown of tooth 14 and the cover surface 14 rests against the distal end of the handle 28. This determines the maximum penetration depth of the endodontic instrument 10 by the height of the spacer 100.

[0084] Furthermore, in Fig. Figure 2 shows a stopper 24 which is received in the cylindrical recess 22 of the spacer 100. The stopper 24 can advantageously be used to fix the spacer 100 firmly to the endodontic instrument 10.

[0085] Fig. 3 differs from Fig. 2 by an additional disc 32, which is located between the handle 28 of the endodontic instrument 10 and the cover surface 14 of the spacer 100. According to the invention, the disc 32 can also be arranged between the crown of the tooth and the base surface 12 of the spacer 100 (not shown).

[0086] The disc 32 is advantageous because it allows for fine adjustment of the penetration depth. Unlike the spacer 100, the disc 32 can also have very small heights, for example ≤ 0.5 mm.

[0087] According to the invention, several discs 32 and several spacers 100 can also be arranged one behind the other on the endodontic instrument 10 in order to achieve a desired working length of the endodontic instrument 10.

[0088] Fig. Figure 4 shows a perspective view of the device 200 according to the invention. It shows a device 200 for providing a spacer 100 according to the invention, wherein the device 200 has a recess 34 for at least partial positive-locking reception of the spacer 100.

[0089] The in Fig. The device 200 shown in Figure 4 has six recesses 34 in a body 36, each of which can accommodate a spacer 100 (not shown). The recesses 34 are shaped such that they are partly truncated pyramidal and partly frustoconical, with the recess 34 being truncated pyramidal towards the edge.

[0090] The spacer 100 can be at least partially positively engaged in the recess 34. The spacer 100 can be clamped in place.

[0091] The recess 34 also has a slit-shaped opening 38 in the base of the body 36 extending towards the edge of the body 36, which is designed to receive an endodontic instrument 10.

[0092] Device 200 also includes a further recess 35 for receiving the stopper 24 (not shown). This further recess 35 is designed such that the stopper 24 can be received at least partially in a form-fitting manner, preferably in a clamping connection. The further recess 35 has a slit-shaped opening 39 extending towards the edge of the body.

[0093] The device 200 according to the invention allows for the easy removal of both the spacer 100 and the stopper 24 from the recess 34 and the further recess 35, respectively. For this purpose, the endodontic instrument 10 (not shown) is first inserted from above through the central opening of the spacer 100 located in the recess 34 and the slit-shaped opening 38 in the base of the body 36, until the spacer 100 is seated on the shaft of the endodontic instrument 10. In the next step, the stopper 24 is then removed from the further recess 35 in a corresponding manner and subsequently pressed into the cylindrical recess 22 of the spacer 100. The spacer 100 and / or stopper 24 can be removed by the reverse procedure.

[0094] Fig. Figure 5 shows a side view of a section of a device 200 according to the invention. The device 200 according to the invention for providing the spacer 100 according to the invention can be seen. Fig. 4. and Fig. Figures 5 show the same design of the device 200 and differ only in perspective.

[0095] Fig. Figure 6 shows a side view of a section of a device 200 according to the invention with a spacer 100 according to the invention and an endodontic instrument 10.

[0096] The endodontic instrument 10 is guided by the spacer 100 and the stopper 24, with the spacer 100 bearing against the handle 28 of the endodontic instrument 10 with its top surface 14. The base 12 of the spacer 100, on the other hand, rests on the body 36 of the device 200, and the spacer 100 is positively engaged in the recess 34 of the device 200. The stopper 24 is also engaged in the cylindrical recess 22 of the spacer 100.

[0097] Assuming that the endodontic instrument 10 were to be pulled out of the spacer 100, the spacer 100 and the stopper 24 would remain in the device 200, since they are connected to the device 200 by a clamping connection.

Claims

[1] Spacer (100) for an endodontic instrument (10) comprising: a base (12) with a diameter (d G ), a cover surface (14) with a diameter (d D ), where the diameter (d D ) is smaller than the diameter (d G ), a rotation axis (16), a lateral surface (18), a height (h), an opening (20) with a longitudinal axis for receiving an endodontic instrument (10) and a cylindrical recess (22) for receiving a stopper (24) on the base surface (12), wherein the spacer (100) is conical, and wherein the opening (20) extends from the base surface (12) to the top surface (14), wherein the longitudinal axis of the opening (20) is arranged coaxially to the rotation axis (16) of the spacer (100), and wherein the cylindrical recess (22) is arranged coaxially to the opening (20). [2] Spacer (100) according to claim 1, characterized by, that the cylindrical recess (22) for receiving a stopper (24) has a volume that corresponds to the volume of a stopper (24). [3] Spacers (100) according to claim 1 or 2, characterized by , that the cylindrical recess (22) for receiving a stopper (24) has a diameter of 2.0 mm to 5.0 mm, preferably 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, or 5.0 mm. [4] Spacers (100) according to any one of claims 1 to 3, characterized by , that the cylindrical recess (22) for receiving a stopper (24) has a height of 0.5 mm to 2.0 mm, preferably 0.5, 1.0, 1.5 or 2.0 mm. [5] Spacers (100) according to any one of claims 1 to 4, characterized by , that the diameter (d G ) is between 5.0 mm and 15.0 mm, preferably between 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5 or 15.0 mm. [6] Spacers (100) according to any one of claims 1 to 5, characterized by , that the height (h) is between 0.75 mm and 15 mm, preferably between 0.75, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0 or 15.0 mm. [7] Spacer (100) according to any one of claims 1 to 6, characterized by , that the opening (20) for receiving an endodontic instrument (10) has a diameter (d O ) of ≤ 2.0 mm, preferably 2.0, 1.9, 1.8, 1.7, 1.6, 1.5, 1.4, 1.3, 1.2, 1.1, 1.0, 0.9, 0.8, 0.75, 0.7, 0.65, 0.6, 0.55, 0.5, 0.45, 0.4, 0.35, 0.3, 0.25, 0.2 or 0.15 mm. [8] Spacers (100) according to any one of claims 1 to 7, characterized by , that the diameter (d D ) is between 2.5 mm and 10.0 mm, preferably between 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 9.0, 9.5 or 10.0 mm. [9] Spacer (100) according to any one of claims 1 to 8, characterized bythat it is made of metal, plastic, silicone, or a combination thereof, preferably PEEK (polyetheretherketone), PPSU, POM-C or stainless steel. [10] Spacers (100) according to any one of claims 1 to 9, characterized by , which has a marker indicating the height (h). [11] Device (200) for providing the spacer (100) according to any one of claims 1 to 10 comprising: a body (36) which has at least one recess (34) for at least partial positive-locking reception of the spacer (100). [12] Device (200) according to claim 11, characterized by , that the recess (34) is cone-shaped or pyramid-shaped. [13] Device (200) according to claim 11 or 12, characterized by , that the at least partially form-fitting receptacle is designed such that the spacer (100) sits in clamping connection in the at least one recess (34). [14] Device (200) according to any one of claims 11 to 13, characterized by , that in the area of ​​the recess (34) a slit-shaped opening (38) extending towards the edge of the body (36) is formed in the base of the body (36) for receiving an endodontic instrument (10). [15] Device (200) according to claim 14, characterized by , that the slit-shaped opening (38) has a diameter of ≤ 2.0 mm, preferably 2.0, 1.9, 1.8, 1.7, 1.6, 1.5, 1.4, 1.3, 1.2, 1.1, 1.0, 0.9, 0.8, 0.75, 0.7, 0.65, 0.6, 0.55, 0.5, 0.45, 0.4, 0.35, 0.3, 0.25, 0.2 or 0.15 mm. [16] Kit (300) for use in endodontic treatment, comprising a device (200) according to any one of claims 11 to 14 and a spacer (100) according to any one of claims 1 to 10. [17] Kit (300) according to claim 16, characterized by, that the kit (300) includes a disc (32) for fine magnification of the spacer, wherein the disc (32) has a height of ≤ 0.5 mm.

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