Handheld impression device and impression device

Abstract

Handheld impression device for insertion into a target region, the handheld impression device comprising: several movable elements (110) arranged in a matrix arrangement for three-dimensional impression of the target region; a positioning device (120) configured for positioning the several movable elements (110) such that a three-dimensional image of the target region is generated by means of the respective positions of the several movable elements (110).

Description

[0001] Various embodiments relate to a handheld impression device and an impression device.

[0002] In general, various devices and procedures can be used to image (e.g., impressions) a target region of a human or animal (e.g., the oral cavity and its surrounding anatomical structures), such as to visualize pathological changes in soft and hard tissue within this region. Typically, classic imaging techniques (e.g., dental radiographs, panoramic radiographs, cone beam computed tomography, CT scans, and MRI scans) are used for this purpose.

[0003] Many common procedures rely on X-rays and involve additional radiation exposure for the patient. Therefore, they are used sparingly for diagnostic purposes (e.g., in children) and are primarily performed when the images are absolutely necessary for treatment. For example, imaging and / or measuring a specific target region (e.g., a cleft lip) is often omitted due to radiation exposure, even though such imaging and / or measurement could significantly enhance the surgical procedure. These benefits could have a positive impact on both the practitioner and the patient before, during, and after the operation (e.g., through improved planning), during the operation (e.g., through a shorter operating time), and after the operation (e.g., through faster recovery).For example, grafts, scaffolds, and / or implants can be used to close a cleft lip and palate. These can usually be roughly adjusted based on imaging or measurements—if these have been performed. Typically, a (fine) adjustment of the grafts, scaffolds, and / or implants can be made again during the operation based on the actual defect, at the discretion of the operating surgeon. Therefore, it is possible that optimal closure of the cleft lip and palate is not guaranteed.

[0004] Several disadvantages are apparent in the currently used methods. Imaging techniques based on ionizing radiation, for example, may be limited in their application (e.g., due to pregnancy, claustrophobia), may only allow selective detail visualization (e.g., primarily hard tissue visualization), and / or may involve radiation exposure (or radiation dose) for the patient. Imaging techniques based on magnetic resonance imaging (MRI) may also be limited in their application (e.g., due to pacemakers, claustrophobia) and may only allow selective detail visualization (e.g., primarily soft tissue visualization), and / or may be very time-consuming. When taking a mechanical dental impression, the accuracy of the impression may be limited by the material and / or the practitioner.Furthermore, such impression taking can be resource-intensive and, due to its invasiveness, uncomfortable for the patient (e.g., due to individual hardening times of the impression materials). The quality of a laser-optical measurement of tooth position (e.g., image accuracy) can be limited by surface contamination and / or surface wetting, resulting in measurement deviations. Additionally, the materials conventionally used for taking impressions may not be suitable for intraoperative use or in wounds (e.g., due to a lack of sterility and / or material residue within the target area). Therefore, for example, the image quality of intraoperative target areas may be insufficient. Consequently, rapid, direct measurement of the original tooth may also be impossible.

[0005] Depending on various aspects, a device (e.g., an impression tool) can be provided that enables non-invasive measurement of large-volume anatomical defects (e.g., 3D defects in the oral cavity). The device can be easy to use.

[0006] Depending on various aspects, a device can be provided whose imaging resolution can be adjusted (e.g., adapted to a target region). The device can exhibit increased resistance to imaging artifacts compared to conventional imaging systems.

[0007] Depending on various aspects, the provided device can be suitable for three-dimensionally representing and / or measuring clefts of the jaw and / or palate. For example, the device can enable the comprehensive representation of the sometimes very complex geometry (e.g., dimensions) of a cleft, thus facilitating optimal impression taking (e.g., adaptation) of augmentation materials to the geometry of the cleft during cleft osteoplasty. The device can also be used more generally to increase the accuracy of reconstruction when fitting augmentation materials in various medical fields (e.g., orthopedics, hand surgery, and foot surgery, etc.), thereby improving and accelerating the healing process (e.g., due to improved bone ingrowth).

[0008] Based on various aspects, a device with a modular design is provided. Using an impression mechanism (e.g., a pin-based positioning mechanism), a three-dimensional image can be created at multiple levels of detail without any device components (e.g., contact pins) penetrating the bone tissue. This approach can, for example, take advantage of the fact that bone has a comparatively high surface hardness.

[0009] Depending on various aspects, the material selection of the impression mechanism (e.g., the materials that come into physical contact with the target region) can be adapted so that material incompatibilities and / or allergic reactions can be prevented.

[0010] Depending on various aspects, the device can be configured to actively move the impression mechanism (e.g., multiple movable elements). For example, the multiple movable elements can be moved (e.g., shifted) towards a region to be impressioned (or imaged) using one or more physical forces (e.g., a bone surface) until they tactilely (e.g., physically) touch the region. Thus, for example, an impression of the target region can be created.

[0011] For example, the one or more physical forces can be one or more of the following: a magnetic force, an electric force, a mechanical force, or gravity. For example, the one or more physical forces can be provided by a pressurized medium (e.g., a fluid (such as a liquid, a gas, a gas-liquid mixture, a gas-solid mixture, or a liquid-solid mixture)). For example, the medium can be fed into and / or encapsulated in a special insert (e.g., a feeder).

[0012] Depending on various aspects, the device can be configured to fix the impression mechanism once it is in full physical contact with the target region. For example, the impression mechanism can be fixed or locked in place by a clamping mechanism. This allows for the creation of a clear inverse model of the target region. For instance, the inverse model can be provided as a digital inverse model (e.g., for 3D printing). The inverse model can be used to create cutting templates and / or for manual shape adjustment of augmentations, scaffolds, osteosynthesis plates, and / or implants.

[0013] Depending on various aspects, a tactile impression tool can be provided that can be manufactured in a compact and / or application-specific design.

[0014] Depending on various aspects, the impression tool can have one or more elements that can or are intended to come into physical contact with tissue (e.g., the palate, (intraoperative) wounds, etc.). For example, the one or more elements can consist essentially of a material and / or be coated (e.g., covered) with a material that is biocompatible and non-allergenic.

[0015] Based on various aspects, a device is provided that enables tactile three-dimensional impression taking without risk of contamination in a target region (e.g., in the oral cavity). For example, the device can be reusable and / or its impression quality (e.g., level of detail, resolution) can be adapted to a specific application.

[0016] Depending on various aspects, the device may have disposable components (e.g., be designed as a disposable device). For example, the device may have disposable components that contain (e.g., are made of) plastic (e.g., ABS, etc.) and / or organic material (e.g., natural materials).

[0017] According to various aspects, a handheld impression device is provided for insertion into a target region, comprising: several movable elements (e.g., linearly displaceable pins) arranged in a matrix for three-dimensional impression of the target region (e.g., a section of the target region); and a positioning device designed to position the several movable elements such that a three-dimensional image of the target region is created by means of the respective positions of the several movable elements.

[0018] This device provides a (comparatively simple) fast, intraoperative, and tactile impression technique with a high information content for the target region (e.g., the oral cavity and / or adjacent anatomical structures, etc.). Furthermore, the device enables minimally invasive three-dimensional measurement of objects within the target region (e.g., within the oral cavity). The device's resolution can be adjusted to the required level of detail. Due to the matrix arrangement, each of the multiple elements can be uniquely assigned to a specific position within the matrix. Moreover, the device is reusable, thus enabling a resource-efficient and sustainable measurement procedure.

[0019] The impression tool enables intraoperative imaging and the immediate creation of an inverse model of the region (e.g., a defect) with comparatively little (e.g., no) contamination in the target area. Based on this inverse model, rapid in-situ fitting of grafts and / or implants to be inserted into the region (such as scaffolds, osteosynthesis plates, or implants) is possible. For example, the device could be used to visualize and / or measure: alveolar bone, clefts, cavities in cysts, after / for osteotomies, and / or surfaces when fitting osteosynthesis plates.

[0020] According to various embodiments, an impression device for taking a mold of an anatomical structure is provided, comprising: several elements that are movably mounted and arranged in a matrix arrangement for three-dimensional impression of an anatomical structure; and a positioning device configured to position the several elements such that a three-dimensional image of the anatomical structure is produced by means of the respective positions of the several elements, wherein the positioning device is configured to position each of the several elements independently of the others. In other words, each of the several elements can be positioned individually.

[0021] The embodiments are shown in the figures and are explained in more detail below.

[0022] They show Fig. 1A to Fig. 5 each a molding device according to different aspects.

[0023] The following detailed description refers to the accompanying drawings, which form part thereof and illustrate specific embodiments in which the invention can be implemented. In this context, directional terminology such as "top," "bottom," "front," "back," "anterior," "rear," etc., is used with reference to the orientation of the described figure(s). Since components of embodiments can be positioned in a number of different orientations, the directional terminology serves only for illustration and is in no way limiting. It is understood that other embodiments may be used and structural or logical modifications may be made without deviating from the scope of protection of the present invention.It is understood that the features of the various exemplary embodiments described herein can be combined with one another, unless specifically stated otherwise. The following description is therefore not to be interpreted in a restrictive sense, and the scope of protection of the present invention is defined by the appended claims.

[0024] Depending on various aspects, an impression device is provided for taking an impression of a target region. The impression device may be designed to be brought into physical contact with the target region in order to take an impression of it. The target region can be any area of ​​the body, such as a region inside and / or outside a human or animal body. For example, the target region may be located within the oral cavity, within a wound, or within a surgical area. A target region could also be another area of ​​the body (e.g., an arm stump, a leg stump, a nose, etc.). It is understood that the impression device does not necessarily have to be suitable for being placed inside the oral cavity if the desired target region is not located there.For example, the target region may be larger (or smaller) (in terms of area and / or volume) than the oral cavity. In such a case, the impression device may also be larger (or smaller) than its respective dimensions.

[0025] Depending on various aspects, an impression device can be suitable for insertion into the oral cavity. This means that its dimensions (e.g., external dimensions) are designed to fit through the open mouth into the oral cavity without injuring it (e.g., the lips, gums, palate, etc.). Furthermore, the weight of a handheld impression device can be adjusted so that it can be operated with one or two hands. An impression device in general can, for example, be positioned on a guide rail or stand, which allows it to be inserted into the oral cavity.

[0026] An impression device can be designed for sterilization in various ways, e.g., thermally and / or by radiation (e.g., UV radiation, ionizing radiation, etc.). It is understood that the impression device must be designed in such a way that its function is not impaired by the sterilization process. Therefore, the impression device can, for example, be designed so that it is not significantly deformed as a result of the sterilization process. Significant deformation would impair the quality of the impression to such an extent that it is no longer sufficient for the intended application. For example, significant deformation can lead to imaging errors caused by the deformation itself.

[0027] For example, the impression device can be made of a surgical material (e.g., surgical steel and / or a suitable plastic) (e.g., consist essentially of this). For example, all components of the impression device that come into contact with the target region (e.g., the wound, the surgical target area) can be made of a surgical material (e.g., consist of this). For example, the components can be provided with a (e.g., sterile) disposable cover that can be replaced after an impression has been taken.

[0028] Fig. Figure 1A schematically illustrates a molding device 100 from various perspectives in a lateral sectional view. The molding device can have several movable elements 110 and a positioning device 120 for positioning the several movable elements 110. The positioning device 120 can be configured to position the several movable elements 110 relative to a target region (e.g., a body region) such that the several movable elements 110 create a three-dimensional impression of the target region. According to various aspects, each of the several movable elements 110 can have a surface. Visually, the surfaces of all the several movable elements 110 can create the impression of the target region. The impression of the target region can also be referred to as an inverse model. According to various aspects, the several movable elements 110 can be movably mounted.For example, the several movable elements 110 can be set up to be moved (e.g. shifted) by the positioning device 120.

[0029] The multiple movable elements 110 can, for example, include movable pins. It is understood that the multiple movable elements 110 can also include elements other than pins, such as hooks, springs, screws, or the like.

[0030] For example, the multiple movable elements 110 can be designed such that they can be pushed out of and / or into the device. For example, the multiple movable elements 110 can be linearly displaceable elements. To illustrate, the multiple movable elements 110 can, for example, be moved upwards (into Fig. 1A in the z-direction) and / or downwards (in Fig. 1A opposite to the z-direction). Furthermore, it is understood that the movement of the multiple elements 110 can also be a movement other than a linear one. For example, a screw-like element can also be rotated to be moved out of or into the device. Visually, a screw-like element can be screwed out of or into the device. For example, the multiple movable elements 110 can be displaced with respect to a z-direction (cf. Fig. 1A) be tilted. This can be advantageous, for example, for taking impressions of target regions that are difficult to access from above or from the side using the impression device 100.

[0031] Depending on various aspects, the multiple movable elements 110 can each be configured to move independently of one another. This can be advantageous, for example, for mapping large gradients (e.g., steep edges).

[0032] According to various aspects, the multiple movable elements 110 can be grouped into multiple functional groups. Each of the multiple functional groups can contain one or more (but not all) of the multiple movable elements 110. For example, a functional group of the multiple functional groups can contain directly adjacent elements of the multiple movable elements 110. The multiple elements of a given functional group can be configured to move together. The multiple elements of a given functional group can be configured to move independently of the elements of the other functional groups. For example, the elements of a functional group can be coupled to one another (e.g., mechanically). For example, the multiple elements of a functional group can be connected to one another by a coupling mechanism (e.g., a connection). Thus, an efficient mapping (e.g.,B. faster, with less effort) made possible, e.g. from surfaces with low (e.g. negligible) gradients.

[0033] Visually, the multiple movable elements can be represented as multiple pins that are movably mounted. These multiple pins can be grouped into multiple functional groups, each containing at least one of the multiple pins. A first functional group can contain a first set of movable pins that are coupled together. A second, third, and fourth group can each contain one of the multiple pins, which, being in different groups, can move independently of each other. Thus, the pins of the first functional group can be better suited to representing larger areas than the second, third, and fourth groups, respectively. Furthermore, the second, third, and fourth groups can be better suited to representing edges.This can be advantageous, for example, if an area within the target region is excluded from the investigation.

[0034] Fig. Figure 1B schematically illustrates the impression device 100. Fig. 1A according to various aspects in a top view. According to various aspects, the multiple movable elements 110 can be arranged in a matrix arrangement. For example, the multiple movable elements 110 can be arranged in N rows and M columns, where N and M are natural numbers greater than or equal to 1. The multiple movable elements 110 can each be configured to be moved out of and / or into the impression device 100 by means of the positioning device 120.

[0035] Thus, each of the multiple elements can be assigned a location within the matrix and an element height. Intuitively, the element height can be understood as a distance representing how far each of the multiple movable elements 110 has been moved out of or into the molding device 100. This will be illustrated below, for example, in Fig. Figure 4 illustrates this. The position of each of the several movable elements 110 can consist of the element's height and its location within the matrix. It is understood that if the matrix arrangement is fixed, a position can essentially be varied by varying the element's height.

[0036] It is further understood that the element area density of the multiple movable elements 110, i.e., the number of elements per unit area, can be adapted to a target region. For example, a very small target region and / or a target region with many gradients may require a higher element area density than a larger target region and / or a target region with fewer gradients. For example, the element area density can be reduced by forming functional groups, e.g., by coupling the elements of the multiple movable elements 110 within a functional group. This intuitively reduces the number of individually movable (e.g., movably mounted) elements. For example, the element area density can be increased by dissolving existing functional groups, e.g., by uncoupling the coupled elements of a functional group.

[0037] Fig. 2A to Fig. Figure 2E schematically illustrates possible operating modes of an impression device 100 according to various aspects in a side view. According to these various aspects, the impression device 100 can be configured to create an impression of a surface structure (e.g., elevations, depressions, etc.) of a target region 210. For this purpose, the impression device 100 can be brought into physical contact with the target region 210, as described below.

[0038] According to various aspects, the several movable elements 110 of the impression device 100 can be extended before an impression is taken (e.g., partially or fully extended), as in Fig. 2A is shown schematically. Subsequently, the impression device 100 can be brought into physical contact with the target region 210. This is exemplified in Fig. Figure 2B illustrates this. The impression device 100 can be pressed against the target region 210, as indicated by arrow 221. Due to this pressure, the multiple movable elements 110 can be moved towards the impression device 100 when their respective surfaces 111 are in physical contact with the target region 210. This is indicated by arrows 222. Once the impression process is complete, the respective position of each of the multiple movable elements 110 can be locked using the positioning device 120. This creates an impression (or an inverse model) of the target region 210, which is represented by the surfaces 111 of the multiple movable elements 110. This is illustrated by way of example in Figure 2B. Fig. 2E is shown.

[0039] According to various aspects, the several movable elements 110 of the impression device 100 can be retracted (e.g., partially or fully retracted) before an impression is taken, as in Fig. 2C is shown schematically. Subsequently, the impression device 100 can be brought close to the target region 210 – but not yet into physical contact with the target region 210. Depending on various aspects, the positioning device 120 can be configured to exert a force on the several movable elements 110 (e.g., to apply it to them), as shown in Fig. 2D. For example, a predetermined force can be individually applied to each of the multiple movable elements 110. Due to the force applied to the multiple movable elements 110, the multiple movable elements 110 can move out of the impression device 100. This is exemplified in Fig. The 2D representation is shown by the arrows 223. The movement of a particular element of the multiple movable elements 110 can stop when a surface 111 of that element is in physical contact with the target region 210. Once all of the multiple movable elements 110 are in physical contact with the target region 210 and / or are fully extended, the impression process is complete. Then, a particular position (in particular, a particular element height) of the multiple movable elements 110 can be locked using the positioning device 120. It is understood that locking can be achieved both by additional locking units and by adjusting the force acting on a particular element. Thus, an impression (or an inverse model) of the target region 210 is created, represented by the surfaces 111 of the multiple movable elements 110. This is exemplified in Fig. 2E is shown.

[0040] It is understood that the two principles described above can also be combined: For example, the multiple movable elements 110 can be in a neutral position before the impression process, i.e., partially extended or retracted. The impression device 100 can then be pressed against the target region 210, bringing an initial set (e.g., one, several, all) of the multiple movable elements 110 into physical contact with the target region 210. Subsequently, a force can be applied, bringing the remaining multiple movable elements 110 into physical contact with the target region 210 and / or completely retracting them from the impression device 100.Alternatively, a force can first be applied to bring a number of the multiple elements into physical contact with the target region 210, and then the impression device can be pressed against the target region 210 by means of a contact pressure. Thus, for example, the impression device 100 can be moved through a smaller opening (e.g., the mouth) into a larger cavity (e.g., the oral cavity). Within the cavity, the movable elements can be partially or completely extended from the impression device 100 by means of the applied force. Then, the impression device 100 can be pressed against the target region 210 as described above. It is understood that a force can again be applied to the multiple movable elements 100 after this to ensure that each of the multiple movable elements 100 is in physical contact with the target region 210 and / or is fully extended.

[0041] Depending on various aspects, one or more forces can be applied to the multiple movable elements 110. For example, a first force can be applied to one or more of the multiple movable elements 110, and a second force, different from the first, can be applied to one or more other elements of the multiple movable elements 110. For example, a predetermined force (e.g., one individually predetermined force) can be applied to each of the multiple movable elements 110. Thus, for example, different strengths of a surface of the target region 210 can be taken into account. For example, a less firm region (e.g., soft tissue) can be subjected to a lower force than a firmer region (e.g., bone) to avoid injury.For example, a force applied to one of the several moving elements 110 can be reduced if this element physically touches a surface of the target region 210. This can, for example, reduce or prevent injuries.

[0042] Depending on various aspects, the positioning device 120 can have one or more force transmission units to apply the force from the positioning device 120 to the several movable elements 110.

[0043] Fig. Figure 3A schematically shows a molding device 100, whose positioning device 120 has several force transmission units 310. For example, each of the several elements can be assigned (at least) one of the several force transmission units 310. It is understood that the respective force transmission units 310 can be adapted to the force to be transmitted (e.g., to a force strength, a force type, etc.). For example, each of the several force transmission units 310 can be assigned to a functional group of the several movable elements 110.

[0044] For example, a magnetic force can be applied to the multiple movable elements 110. For this to occur, the one or more force transmission units 310 must have magnetic elements (e.g., be magnetic). The magnetic elements can be arranged, for example, to repel each other. Alternatively, the magnetic elements can be configured to control the magnetic field strength (e.g., electromagnets). Thus, for example, increasing the magnetic field can generate a greater force on a corresponding element of the multiple movable elements 110.

[0045] For example, a physical force can be applied to the multiple movable elements 110. For example, the one or more force transmission units 310 can have (e.g., be) mechanical elements. A mechanical element can be, for example, a mechanical spring, a lever, a lifting element, etc., each configured to move (e.g., move individually) the multiple elements.

[0046] Depending on various aspects, a force transmission unit 310 can be assigned to several or all of the several movable elements 110. For example, a force transmission unit can be assigned to a functional group of the several movable elements 110. For example, a force can be transmitted from the force transmission unit 310 to all elements assigned to this force transmission unit 310, causing them to move until each of these elements is in physical contact with the target region 210 or is fully extended. Subsequently, several movable elements 110 can be fixed, as described herein.

[0047] Depending on various aspects, energy and / or a medium can be supplied to the one or more power transmission units 310, which can then provide a force that can be transferred to (or applied to) the multiple moving elements 110. For example, the one or more power transmission units 310 can be configured to convert the supplied energy and / or medium into a force for moving the multiple moving elements 110. For example, energy can be supplied in the form of electrical energy (e.g., in the form of an electrical voltage and / or an electric current). For example, the one or more power transmission units 310 can have (e.g., be) one or more electric motors. For example, energy can be supplied in the form of thermal energy.For example, the one or more force transmission units 310 can have (e.g., be) thermally activatable actuators configured to change a dimension (e.g., external dimensions) due to thermal energy and thereby generate force. To illustrate, the thermally activatable actuators can, for example, be configured to expand and / or contract due to a temperature change and consequently move the multiple movable elements 110. For example, the one or more force transmission units 310 can have (e.g., be) chemically activatable actuators configured to change a dimension (e.g., external dimensions) due to a chemical process and thereby generate force. For example, the one or more force transmission units 310 can have one or more hydrogel elements configured to change their volume (e.g.,due to an optical stimulus and / or the presence or absence of a liquid). For example, a medium (e.g., a fluid, such as a liquid and / or a gas) can be provided at a specific pressure. Due to this pressure, the multiple movable elements 110 can be moved. For example, the medium can be enclosed, and additional pressure is applied externally, e.g., by compressing the medium.

[0048] For example, a pressure-based force can be applied to several moving elements 110. For this purpose, one or more force transmission units 310 can be connected to a feed unit, for example. Fig. Figure 3B shows a molding device 100 according to various aspects. A positioning device 120 of the molding device 100 can have a feeding unit 320 and one or more force transmission units 310.

[0049] Depending on various aspects, the feed unit 320 can be configured to supply energy and / or a medium to the multiple elements 110, as previously described. Based on the supplied energy and / or medium, a force can be transmitted to (or applied to) the multiple moving elements 110. The supplied energy and / or medium can be distributed to the one or more power transmission units 310 by means of the feed unit 320. For example, the medium can be a fluid (e.g., a liquid and / or a gas). For example, the medium can be provided in the feed unit 320 at a predetermined pressure. The medium can be supplied to the one or more power transmission units 310 via the feed unit 320.For example, a functional group of several movable elements 110 can thus be moved simultaneously if the medium is supplied simultaneously to the one or more power transmission units 310 that correspond to the functional group of several movable elements 110.

[0050] Depending on various aspects, the feed unit 320 can be configured to supply energy and / or the medium individually to the multiple power transmission units 310 (e.g., by means of multiple valves and / or multiple switches). For example, once the molding process is complete, the respective power transmission units 310 can be disconnected from the feed unit 320. This allows the corresponding elements of the multiple movable elements 110 to be locked in their respective positions and thus fixed. The feed unit 320 can therefore assume a locking function. The components used for this purpose (e.g., the multiple valves and / or the multiple switches) can be understood as locking units. For example, the multiple movable elements 110 can be locked (additionally or alternatively) by means of one or more (additional) locking units.

[0051] Similarly, the pressing method described above can also be implemented, as briefly described below. A medium can be located in the feed unit 320 and the force transmission units 310. As a result of pressing the molding device 100 against the target region 210 and the associated physical contact of the several movable elements 110 with the target region 210, a higher pressure can arise in the respective force transmission units 310. This excess pressure can be supplied to the feed unit 320, e.g., via pressure valves. For example, the resulting increased pressure can be compensated for by reducing the quantity of the medium. After the several movable elements 110 are in physical contact with the target region, as described above, the elements can be locked in their respective positions.

[0052] For example, once the molding process is complete, a force equilibrium can be established in the force transmission units 310. This force equilibrium can arise from the weight of each of the multiple movable elements 110 and the pressure of the fluid remaining in the respective force transmission unit. Due to this equilibrium, the position of each of the multiple movable elements 110 can be fixed. For example, the multiple movable elements 110 can be locked (additionally or alternatively) by means of one or more locking units.

[0053] In Fig. Figure 3C schematically depicts a molding device 100 according to various aspects, comprising several movable elements 110 and a positioning device 120. Furthermore, the positioning device 120 can include one or more locking units 330 for locking the multiple elements in a respective position. It is understood that, as previously described, the function of the locking units 330 can be supported or completely taken over by the force transmission units 310.

[0054] Depending on various aspects, the one or more locking units 330 can be configured to lock the multiple elements in a given position. The one or more locking units 330 can have mechanical clamps (e.g., be) configured to clamp the multiple elements in a given position. For example, the one or more locking units 330 can have adhesive elements (e.g., be) configured to adhere to the multiple elements 110, thus fixing the multiple movable elements 110 in a given position. For example, an adhesive element can be a magnetic (e.g., electromagnetic) element that fixes a given element by virtue of a magnetic force.

[0055] For example, the multiple locking units 330 can be two plates that are movable relative to each other, through which the multiple elements extend. It is understood that only one of the two plates needs to be movable relative to the impression device 100, but both plates can also be movable. For example, the two plates can be moved relative to each other in such a way that the multiple movable elements 110 are clamped and thus fixed in their respective positions. This movement can be controlled (e.g., activated and / or deactivated) by a mechanism (e.g., a lever).

[0056] Depending on various aspects, the multiple movable elements 110 can be moved out of or into the impression device 100 at a certain element height. This element height can be detected, for example, by means of one or more sensors.

[0057] Fig. Figure 4 schematically shows a molding device 100 which, according to various aspects, has several movable elements 110, a positioning device 120, and several sensors 410. The several sensors 410 can be configured to determine the respective element height 411, which represents the distance of each of the several movable elements 110 from a baseline 120a of the positioning device 120. For example, each of the several movable elements 110 can be assigned one of the several sensors 410. The respective assigned sensor can be configured to detect the element height 411, which represents the distance of the respective element from the baseline 120a. It should be understood that the positions of the several sensors 410 and the baseline 120a shown are only examples and other locations can be chosen.

[0058] Depending on various aspects, the impression device 100 can be configured to generate and output a control signal representing the measured element heights. Furthermore, the impression device 100 can be configured to receive an input control signal that triggers the locking and / or unlocking of the multiple movable elements 110. The input control signal can be, for example, an electrical signal, an optical signal, or a mechanical signal (e.g., the activation of a switch, etc.).

[0059] Depending on various aspects, the impression device 100 can be connected to a control device configured to receive an output control signal from the impression device 100 and to transmit an input control signal to the impression device. Thus, the impression device can be configured to control the position of the multiple movable elements 110. For example, the control device can be configured to control a force applied to the impression device 100 (e.g., the force applied to the individual elements of the multiple elements, an applied pressure (e.g., that of the fluid), etc.).

[0060] The control device can be configured to apply a force to the impression device 100 to move the movable elements 110, based on the received output control signal from the impression device 100, and to provide an input control signal by which the position of the multiple movable elements 110 can be changed and / or fixed. For example, the control device can be configured to adjust the applied force (e.g., applied pressure) corresponding to the output control signal (e.g., to increase or decrease it), for example, individually for each of the multiple movable elements 110. For example, the control device can be configured to activate and / or deactivate the locking units 330 of the impression device 100 by means of an input control signal, thereby fixing or releasing the multiple elements.Depending on various aspects, the input control signal can be configured to control the multiple force transmission units 310 (e.g., individually). For example, the input control signal can represent a force that the multiple force transmission units 310 transmit to the multiple movable elements 110. Alternatively, the input control signal can represent a position (e.g., an element height) of the multiple movable elements 110, which can be set by means of the multiple force transmission units 310.

[0061] Depending on various aspects, the control device can have a memory for storing the output signal of the molding device 100, which represents the positions of the multiple movable elements 110 and thus of a specific inverse model. Furthermore, the control device can be configured to load the stored positions. Based on the loaded positions, a corresponding force can be applied to the individual elements of the multiple elements, and an input control signal can be generated. Thus, the inverse model loaded from the memory can be produced on the molding device 100. For example, the stored data can also be used to create a structure corresponding to the inverse model using a 3D printer.

[0062] Depending on various aspects, an impression device can be designed as a handheld device. In this context, a handheld device can be understood as a device suitable for manual use (e.g., guided operation), i.e., with one hand (preferably) or with two hands. For example, a handheld device may have one or more handles by which it can be gripped. The handheld device may be designed (e.g., with a certain weight and / or dimensions (e.g., external dimensions)) such that it is suitable for being guided and used by hand (e.g., by a person). For example, a handheld device may be designed so that no additional aids are necessary to guide it other than one or two hands (e.g., by a person). It is understood that a handheld device can also be guided by a mechanical hand (e.g., a robotic hand or arm).

[0063] Fig. Figure 5 shows an example of a handheld impression device 500 according to various aspects. In addition to the components of an impression device 100 mentioned above, a handheld impression device 500 can have a handle 510. This can be used to manually position the handheld impression device 500. Furthermore, the handheld impression device 500 can have several movable elements 110. The multiple movable elements 110 with different element heights are shown as examples.

[0064] For example, the handheld impression device 500 can have a first plate 331 and a second plate 332 as locking units. As described above, the multiple movable elements 110 can extend through the first and second plates 331, 332. Furthermore, the first and second plates 331, 332 can be displaced relative to each other such that the multiple movable elements 110 can be clamped (e.g., wedged) and thereby fixed. For example, the fixing can be triggered or released by flipping a lever 333. The multiple movable elements 110 can be moved by one or more force transmission units (not shown). To introduce a force to the force transmission units, the handheld impression device 500 can have a feed unit 320. Through this feed unit, a fluid, an electrical voltage, an electric current, etc., can be supplied, as described above.

[0065] The following are some examples that relate to what is described herein and depicted in the figures.

[0066] Example 1 is an impression device, e.g., a handheld impression device, for insertion into a target region (e.g., an oral cavity). The impression device may comprise: several movable elements (e.g., linearly displaceable pins) arranged in a matrix for three-dimensional impression of the target region (e.g., a section of the target region, e.g., a region of the oral cavity); and a positioning device configured to position the several movable elements such that a three-dimensional image of the target region (e.g., a section of the target region, e.g., a region of the oral cavity) is generated by means of the respective positions of the several movable elements.

[0067] Example 2 is a molding device according to Example 1, wherein the matrix arrangement has an element area density of at least one element per 1 mm². 2 This feature ensures high impression accuracy of a three-dimensional defect within the target region (e.g., within the oral cavity). Furthermore, it allows for the representation of steep gradients within the three-dimensional defect.

[0068] Example 3 is a molding device according to Example 1 or 2, wherein the multiple movable elements are multiple linearly (e.g., straight-line) movable pin elements.

[0069] Example 4 is a molding device according to one of Examples 1 to 3, wherein the several movable elements are arranged to be coupled together to form several functional groups, wherein the movable elements of different functional groups can be moved separately from one another, and wherein the movable elements of a group can only be moved together (e.g., uniformly).

[0070] Example 5 is a molding device according to one of Examples 1 to 4, wherein the positioning device is configured to transmit a force to the several movable elements in order to move them along a first direction. For example, the first direction may be a direction directed towards the target region.

[0071] Example 6 is a molding device according to Example 5, wherein the positioning device has one or more force transmission units, each configured to transmit the force to the several movable elements. For example, the force transmission units can be configured to transmit a magnetic force, an electrical force (e.g., an electrostatic force), an electromagnetic force, or a mechanical force (e.g., pressure (pneumatic pressure, fluid pressure, etc.), a spring force, etc.)).

[0072] Example 7 is a molding device according to Example 6, wherein each of the several movable elements is assigned one of the several force transmission units.

[0073] Example 8 is a molding device according to Example 6 or 7, wherein each of the several movable elements is assigned exactly one of the several force transmission units, and each of the several force transmission units is assigned exactly one of the several movable elements. Thus, a one-to-one mapping between the several force transmission units and the several movable elements can be created. Therefore, for example, each of the several movable elements can be controlled individually.

[0074] Example 9 is an impression device according to any one of Examples 1 to 8, wherein the impression device is configured to receive an input control signal for the controlled movement of the movable elements. For example, the control signal can represent a force according to Example 5. For example, the input control signal can be an electrical control signal, a thermal control signal (e.g., heating and / or cooling), a mechanical control signal, and / or an optical control signal, etc. For example, the input control signal can be provided by a computer or the like. For example, the input control signal can be provided by an internal or external (electronic) controller. For example, the input control signal can be manually controlled (e.g., by a switch, a hand pump, etc.).

[0075] Example 10 is a molding device according to Example 9, wherein the control signal contains information representing target positions of the movable elements, and wherein the positioning device is configured to position the movable elements corresponding to the information of the control signal.

[0076] Example 11 is a molding device according to one of Examples 1 to 10, wherein the positioning device is configured to individually position (e.g. move) each of the several movable elements.

[0077] Example 12 is a molding device according to any one of Examples 1 to 11, wherein the positioning device is configured to move each of the several movable elements independently of the other several movable elements.

[0078] Example 13 is a molding device according to one of Examples 1 to 12, wherein the several movable elements are mechanically decoupled from each other (e.g., uncoupled from each other).

[0079] Example 14 is a molding device according to one of Examples 1 to 13, wherein the multiple movable elements are arranged such that the surfaces of directly adjacent elements can be displaced relative to each other by more than 1 cm. It is understood that this refers to the surfaces of the multiple movable elements that come into physical contact with the target region.

[0080] Example 15 is a molding device according to one of Examples 1 to 14, wherein directly adjacent elements of the several movable elements are independently displaceable. This allows, for example, a high resolution (e.g., a high level of detail) for gradients or edges.

[0081] Example 16 is an impression device according to any one of Examples 1 to 15, wherein the impression device is configured such that it can be heated without damage (i.e., without permanent deformation and / or without impairing the imaging function) to a temperature of up to 80°C, e.g., preferably 100°C, e.g., further preferably 135°C, for sterilizing the impression device. The selected temperature may depend on the required degree of sterility. For example, the degree of sterility may increase with increasing temperature. For example, the impression device may optionally also be configured such that it can be exposed without damage to a pressure of up to 1500 hPa, e.g., preferably up to 2000 hPa, e.g., further preferably up to 2500 hPa, for sterilizing the impression device. For example, a higher degree of sterility may be achieved due to a higher pressure.

[0082] Example 17 is an impression device according to any one of Examples 1 to 16, wherein the impression device comprises surgical materials (e.g., (surgical) steel, plastic) (e.g., preferably consists substantially of such materials).

[0083] Example 18 is a molding device according to any one of Examples 1 to 17, wherein the positioning device has one or more locking units configured to lock the multiple movable elements.

[0084] It goes without saying that the multiple movable elements can be locked in any desired position.

[0085] Example 19 is a molding device according to Example 18, wherein the one or more locking units have one or more mechanical clamps (e.g. are).

[0086] It is understood that the one or more locking units can be (functionally) coupled to, or even be, the one or more force transmission units. For example, the locking unit can be configured to establish or maintain a force equilibrium, thereby preventing movement of the moving elements and locking them in place. For example, in a pneumatic force transmission, a locking unit can be a gas valve, the closing of which sets a gas pressure. In an electromagnetic force transmission, for example, the magnetic field can be set to a specific field strength.

[0087] It is further understood that the one or more locking units can be independent of the power transmission units.

[0088] Example 20 is a molding device according to Example 18 or 19, wherein the multiple locking units have (e.g.) multiple perforated plates that can be moved in opposite directions relative to each other, and wherein the multiple slidably mounted elements extend through the holes of the perforated plates.

[0089] Example 21 is a molding device according to one of Examples 1 to 20, which optionally further comprises one or more sensors for detecting a respective (absolute, relative) position of the several movable elements.

[0090] Example 22 is a molding device according to any one of Examples 1 to 21, wherein the molding device is configured to generate an output control signal representing an image or the positions of the elements. For example, the output control signal can be based on the respective positions of the several movable elements detected by the one or more sensors according to Example 21.

[0091] Thus, for example, a mechanical and a digital model of the target region (e.g., a section of the target region, e.g., a region of the oral cavity) can be created simultaneously.

[0092] Example 23 is an impression device, e.g. a handheld impression device, for taking an impression of an anatomical structure, the impression device comprising: several elements which are movably mounted and which are arranged in a matrix arrangement for taking a three-dimensional impression of an anatomical structure; and a positioning device which is configured to position the several elements such that a three-dimensional image of the anatomical structure is produced by means of the respective positions of the several elements, wherein the positioning device is configured to position each of the several elements independently of the other several elements.

[0093] It is understood that the preceding examples of impression devices according to Examples 1 to 22 can also be applied analogously to the impression device according to Example 22.

Claims

[1] Handheld impression device (500) for insertion into a target region of a body, comprising handheld impression device (500): • several movable elements (110) arranged in a matrix arrangement for three-dimensional molding of the target region; • a positioning device (120) which is set up to position the several movable elements (110) such that a three-dimensional image of the target region is generated by means of the respective positions of the several movable elements (110). [2] Handheld impression device (500) according to claim 1, wherein the matrix arrangement has an element area density of at least one element per 1 mm² 2 exhibits. [3] Handheld impression device (500) according to claim 1 or 2, wherein each of the several movably mounted elements (110) is a linearly movable pin element. [4] Handheld impression device (500) according to one of claims 1 to 3, wherein the positioning device (120) is configured to transmit a force to the several movably mounted elements (110) in order to move them along a first direction. [5] Handheld impression device (500) according to claim 4, wherein the positioning device (120) has one or more force transmission units, each of which is configured to transmit the force to the multiple movably mounted elements (110). [6] Handheld impression device (500) according to claim 5, wherein each of the several movably mounted elements (110) is assigned one of the several force transmission units. [7] Handheld impression device (500) according to any one of claims 1 to 6, wherein the handheld impression device (500) is configured to receive an input control signal for controlled movement of the movable elements (110). [8] Handheld impression device (500) according to one of claims 1 to 7, wherein the positioning device (120) is configured to position each of the several movable elements (110) individually. [9] Handheld impression device (500) according to any one of claims 1 to 8, wherein the positioning device (120) is configured to move each of the several movable elements (110) independently of the other several movable elements (110). [10] Handheld impression device (500) according to one of claims 1 to 9, wherein directly adjacent elements (110) of the several movable elements (110) are independently displaceable. [11] Handheld impression device (500) according to any one of claims 1 to 10, wherein the handheld impression device (500) is configured such that it can be heated without damage up to a temperature of 80°C, or preferably 100°C, or more preferably 135°C for sterilizing the handheld impression device (500). [12] Handheld impression device (500) according to any one of claims 1 to 11, wherein the positioning device (120) has one or more locking units (330) which are configured to lock the multiple movably mounted elements (110). [13] Handheld impression device (500) according to claim 12, wherein the one or more locking units (330) have one or more mechanical clamps. [14] Handheld impression device (500) according to one of claims 1 to 13, further comprising one or more sensors (410) for detecting a respective position of the movable elements (110). [15] Impression device (100) for taking an impression of an anatomical structure, comprising the impression device (100): several elements (110) which are movably mounted and which are arranged in a matrix arrangement for three-dimensional molding of an anatomical structure; a positioning device (120) which is configured to position the multiple elements (110) such that a three-dimensional image of the anatomical structure is generated by means of the respective positions of the multiple elements (110), wherein the positioning device (120) is configured to position each of the multiple elements (110) independently of the other multiple elements (110).