Dental abutments for intraoral or extraoral scanning

Abstract

The present invention relates to the field of implant treatment devices, more specifically to a scanbody or scan abutment for a dental implant which is suitable for high-precision intraoral scanning when mounted on the dental implant, the scanbody also being suitable for scanning when mounted on an implant analogue, e.g. when mounted on a model of a patient's mouth.

Description

[Technical field]

[0001] The present invention relates to the field of devices for implant therapy. More specifically, the invention provides a scanbody or scan abutment for a dental implant which is suitable for high-precision intraoral scanning when mounted on the dental implant. The scanbody is also suitable for scanning when mounted on an implant analogue, e.g. when mounted on a model of a patient's mouth. [Background technology]

[0002] Custom-made dental abutments such as crowns or bridges for mounting on implants fastened in a patient's jawbone are usually manufactured on the basis of a scan. The scan is made on an implant analogue in a model of the patient's mouth, i.e. a scanbody element or scanbody or scanabutment mounted outside the patient's mouth. Alternatively, the scan can be made inside the patient's mouth with the scanbody mounted on the patient's jawbone, i.e. an implant placed in the oral cavity. The scan of recognizable features on the scanbody helps to provide precise information about the position and orientation of the scanbody element, and thus also the position and orientation of the implant or implant analogue, allowing the patient's mouth to be digitally represented, and using these data to create a custom abutment or bridge that fits exactly to the implant.

[0003] Known scanbodies include a threaded base that is screwed onto the implant. Once the base is fastened to the implant analog, the dentist or surgeon manually positions and presses a polymer cap on top of the base. The polymer cap has features that are recognizable in the subsequent scan.

[0004] Other known scanbodies include several parts that may come apart during use, leading to inaccurate intraoral scans or loss of parts of the scanbody within the patient's mouth.

[0005] An example of a known scanbody is disclosed in WO 2019 / 162446.

[0006] These systems, because the scanning element is mounted on a separate part that is screwed into the implant, result in a rather low accuracy of the scan result for the orientation of the implant, thus leading to possible errors in the determination of the inclination angle of the implant. The resulting dental bridge or bar manufactured based on such a scan may therefore be inaccurately attached to the implant, which may cause various health problems, such as infection and bone deterioration, thus resulting in additional costs and pain for the patient. Generally, very high precision is required, for example a tolerance of less than 5-6 μm.

[0007] Furthermore, fastening each part required for performing a scan individually to the implant can be a rather cumbersome process, especially if the scan is performed intra-oral, which can lead to undesired breakage of known scanbodies.

[0008] Furthermore, there are potential safety and hygiene issues associated with using a scanbody orally.

[0009] Therefore, an improved scanbody that exhibits a high degree of robustness and provides a safer and more hygienic approach for intra-oral use would be advantageous. Thus, improved scanbodies would be advantageous, and in particular scanbodies that are more reliable, robust, easy to clean, safe, and easy to manufacture.

[0010] SUMMARY OF THE PRESENT EMBODIMENT It is therefore an object of the present invention to provide a scanbody that is easily cleanable.

[0011] It is also an object of the present invention to provide a scanbody that is safe for oral use.

[0012] It is also an object of the present invention to provide a method of assembling a scanbody that is reliable and delivers the scanbody in one piece.

[0013] An object of the present invention may also be seen as providing a robust scanbody that avoids undesired breakage when fastening to an implant or implant analog.

[0014] A further object of the present invention may also be seen as providing an alternative to the prior art.

[0015] In particular, it may be seen as an object of the present invention to provide a scanbody with an optimized aperture configuration, which can be used for fastening to an implant or an implant analogue, and thus has improved robustness, cleaning and safety features. Summary of the Invention

[0016] The above mentioned objects and certain other objects are intended to be obtained in a first aspect of the present invention by a scanbody insertable into or onto a dental implant or into or onto an implant analog and recognizable by an optical scanning system arranged to find the orientation and position of the scanbody, the scanbody comprising a first hollow member and a second member for fastening or fixing the scanbody to the dental implant or implant analog.

[0017] The scanbody can be inserted directly into or onto the implant or into or onto the implant analog, but in some cases the scanbody may be inserted into or onto an intermediate structure, such as an abutment mounted in or on the implant or implant analog.

[0018] The first hollow member is characterized by having a distal end, a central or core portion, and a proximal end portion, the distal end portion comprising at least one geometric feature recognizable by an optical scanning system, and the central portion comprising an opening referred to as the central opening.

[0019] A second member for fastening the scanbody to the dental implant or implant analog comprises an elongated part having an upper portion and an end threaded portion, the end threaded portion extending from a proximal end of the first hollow member, and a retaining means for retaining at least a portion of the elongated part within the first hollow member, the retaining means fastening the upper portion of the elongated part.

[0020] The presence of the second member allows for fastening the scanbody to the dental implant or implant analog. The second member or inner member is located at least partially within the hollow area of ​​the first hollow member.

[0021] In some embodiments, the first hollow member may be cylindrical or conical, however, the first hollow member may be other geometric shapes.

[0022] The distal end of the first hollow member is the end that, in use, is located away from the dental implant or implant analog.

[0023] The distal end comprises at least one geometric feature recognizable by an optical scanning system.

[0024] In some embodiments, the at least one geometric feature is a portion recognizable in an optical scan, the portion being recognizable in terms of angular position by having a first surface in a cross-sectional plane relative to the longitudinal axis of the scanbody.

[0025] The distal end has an opening along the longitudinal axis of the scanbody, referred to as the distal end opening.

[0026] The distal end opening is configured to allow insertion of a fastener, such as a driver or driver tip.

[0027] The distal end opening, eg, throughbore, has a dimension, eg, at least one dimension arranged for insertion of a fastener, such as insertion of a driver tip.

[0028] The term "dimension" as used herein refers to a measurable extent of a particular type, such as length, width, depth or height.

[0029] The dimension, shape or size of the distal end opening is optimized to have a minimum cross section that allows for the insertion of a fastener.

[0030] A small distal tip opening is preferred to maximize the surface area of ​​the upper distal tip, which is preferred for optimal and more accurate scanning.

[0031] In some embodiments, the distal end opening has a dimension, such as a diameter, that is less than 1.4 mm. In some embodiments, the distal end opening has a dimension, such as a diameter, that is smaller than the proximal end opening.

[0032] The proximal end of the first hollow member is the end that, in use, is closer to the dental implant or implant analogue.

[0033] The proximal end has an opening along the longitudinal axis of the scanbody, referred to as the proximal end opening.

[0034] The longitudinal axis is the axis that spans the length of the scanbody from the distal opening to the proximal opening.

[0035] The proximal end opening is configured to allow insertion of the elongated part of the second member, i.e., has a dimension, such as at least one dimension arranged for insertion of the elongated part of the second member. The insertion of the elongated part of the second member occurs prior to fastening of the retaining means. The elongated part is inserted into the hollow region of the first hollow member in a direction from the proximal end opening to the distal end opening.

[0036] In some embodiments, the elongated part of the second member may be cylindrical or conical, however, the elongated part of the second member may be of other geometric shapes.

[0037] The function of the proximal end opening is to allow insertion of the elongate part of the second member and its dimension, size or shape is at least as large as the cross section of the elongate part.

[0038] The distal end opening has a dimension, such as a diameter, that allows the elongated part to rotate within the proximal end opening when the elongated part is inserted.

[0039] In some embodiments, the distal end opening has dimensions such as a diameter of 1.4 mm to 3 mm.

[0040] The central portion of the first hollow member is the region of the first hollow member between the distal end and the proximal end.

[0041] The central portion is characterized by the presence of an opening that has several functions, namely the central opening.

[0042] In some embodiments, the central opening has one dimension that is greater than the maximum dimension of a cross-section of the proximal opening, the cross-section being perpendicular to the longitudinal axis.

[0043] Moreover, in some embodiments, the central opening is configured to allow for insertion of the retaining means of the second member into the first hollow member.

[0044] The central opening has the function of allowing the introduction of a retaining means which, when inserted through the proximal opening, is secured to the upper portion of the elongate part.

[0045] Since the retaining means has at least one dimension greater than the maximum dimension of the cross-section of the proximal end opening so as to be able to retain at least a portion of the elongate part within the first hollow member, the central opening must have a correspondingly appropriate dimension.

[0046] The distal end opening is much smaller than the proximal end opening because its only function is to accommodate the tip of the fastener, and thus the central opening has at least one dimension that is greater than the maximum dimension of the cross-section of the distal end opening, where this cross-section is perpendicular to the longitudinal axis.

[0047] In some embodiments, the middle opening is configured to allow cleaning of a hollow region within the first hollow member, thereby allowing cleaning of a hollow region accessible through the middle opening.

[0048] The scanbody of the present invention is particularly advantageous in that it improves hygiene during use within the oral cavity.

[0049] The central opening also has a dimension, shape and size that allows for cleaning of undesirable residual material within the hollow region of the first hollow member.

[0050] The central opening may have a circular shape, an oval shape, a slot shape, or any other suitable shape capable of performing that function.

[0051] In some embodiments, the central opening has at least one dimension, such as a diameter, in the range of 1.4 mm to 3 mm.

[0052] The central opening may be a through hole or may be an opening on only one side of the central portion.

[0053] In some embodiments, the central opening is a side opening, ie, an opening on the side of the first hollow member.

[0054] In some embodiments, the central opening is configured to allow fastening of a safety means, such as a safety thread, thereby avoiding misplacement of the scanbody during use.

[0055] The scanbody of the present invention is particularly advantageous for intra-oral use in that it reduces the risk of dropping unwanted objects into the patient's mouth.

[0056] This is achieved by fastening the elongated part within the hollow region of the first hollow member, thus preventing any possibility of losing unwanted objects within the patient's mouth.

[0057] Furthermore, a safety feature can be fastened to and / or through the central opening, thus allowing the dentist or surgeon to more safely handle the one-piece scanbody in the patient's mouth, which significantly reduces the risk of dropping the scanbody in the patient's mouth and having to retrieve it.

[0058] The central opening may be located below a centerline of the central portion.

[0059] In some embodiments, the central opening is located at a lower end of the central portion, such as the end toward the proximal end of the first hollow member.

[0060] In some embodiments, the central opening has a center located below the centerline of the first hollow member.

[0061] Additionally, in some embodiments, the central opening has a center that is further from a top surface of the distal end than from a bottom surface of the proximal end of the first hollow member.

[0062] In some embodiments, the central opening has a central axis that intersects with the longitudinal axis of the scanbody.

[0063] In some other embodiments, the central axis of the central opening is perpendicular to the longitudinal axis.

[0064] In some embodiments, the retaining means has at least one dimension greater than the maximum dimension of the cross-section of the distal end opening and the proximal end opening, the cross-section perpendicular to the longitudinal axis, thereby retaining at least a portion of the elongated part within the first hollow member.

[0065] The retaining means serves to fasten to an upper portion of the elongated part to retain at least a portion of the elongated part within the first hollow member.

[0066] To be compatible with its function, the retaining means must have at least one external dimension, such as an outer diameter, that is greater than the maximum dimension of the proximal end opening and must be fastened to the top of the elongated part.

[0067] In some embodiments, the retaining means is configured to engage an upper portion of the elongate part.

[0068] The elongate part can be repositioned relative to the proximal end opening along the longitudinal axis of the scanbody prior to fastening the retaining means.

[0069] In some embodiments, the retaining means is fastened to the top of the elongate strip by one or more external protrusions on the retaining means configured to be press-fitted into the top of the elongate strip.

[0070] In some other embodiments, the retaining means is fastened to the top of the elongated part by one or more external protrusions on the top of the elongated part that are configured to be press-fitted into the retaining means.

[0071] Furthermore, in some embodiments, the retaining means is fastened to the top of the elongate part by adhesive, by laser welding, and / or by corresponding threads on the retaining means and the top.

[0072] The retaining means and the top of the elongate part may be fastened through a bayonet connection.

[0073] In some embodiments, the retaining means is or comprises a ball or a cylindrical head configured to engage the top of the elongate part.

[0074] In some other embodiments, the retaining means is or comprises a ring surrounding a top portion of the elongated part, the ring being configured to retain at least a portion of the elongated part within the first hollow member.

[0075] The top or head portion may be or may comprise a ring, such as a locking ring, surrounding the top of the elongated part having a diameter substantially larger than the maximum diameter of the elongated part, such as the maximum diameter of the cross-section of the elongated part.

[0076] A ring is defined herein as any small circle or open small circle having at least one dimension, such as an outer diameter, that is greater than one dimension of the elongated part, and thus the dimension of the proximal end opening, that presents an obstacle when sliding the elongated part out of the proximal end opening.

[0077] In some other embodiments, the retaining means may be a shape other than circular, such as a square, rectangle or triangle, and have the same function of preventing the retaining means from sliding or pulling out of the elongated part through the proximal end opening when the retaining means is fastened to the elongated part.

[0078] In some embodiments, the retaining means comprises a head piece or head member.

[0079] The head piece, such as a screw head, may have an at least partially threaded region and be configured to engage threads on the upper portion of the elongated piece.

[0080] In some embodiments, the head piece is configured to engage with a fastener insertable through the distal end opening, thereby allowing the scanbody to be fastened to a dental implant or implant analog.

[0081] In some embodiments, the head piece includes a recess for receiving a fastener through the distal end opening.

[0082] In some other embodiments, the top portion of the elongated part is configured to engage a fastener insertable through the distal end opening, while the head part simply functions to retain the elongated part.

[0083] The head part may be a screw head which can be fastened by adhesive, laser welding and / or by means of a retaining means and corresponding threads on the upper part of the elongated part.

[0084] In some embodiments, the first hollow member and / or the second member may be made from a polymer including PEEK, ceramic, Teflon, polyoxymethylene (POM), or combinations thereof.

[0085] In some other embodiments, the first hollow member and / or the second member may be made of a metal or alloy that includes at least one of the following elements or alloys: titanium, zirconium, and steel.

[0086] Additionally, in some embodiments, the first hollow member and / or the second member may be made from a biocompatible material and may be disposed for use within the oral cavity.

[0087] In a second aspect, the present invention relates to a method for assembling a scanbody according to the first aspect, the method comprising inserting an elongated part of a second member into the first hollow member through the proximal end opening, inserting a retaining means of the second member into the first member through the central opening, and fastening the retaining means to an upper portion of the elongated part by manipulating it through the central opening.

[0088] Fastening may also be referred to as being secured, such as locked into place.

[0089] In some embodiments, the fastening is by laser welding, adhesive, threading, press fit, snap fit, or interference fit.

[0090] The first, second and other aspects and embodiments of the present invention may each be combined with any of the other aspects and embodiments. These and other aspects of the present invention will be apparent from and elucidated with reference to the following embodiments. [Brief description of the drawings]

[0091] The scanbody and method according to the present invention will now be described in more detail with reference to the accompanying drawings, which show one mode of carrying out the invention and are not to be construed as limiting other possible embodiments falling within the scope of the appended set of claims. [Figure 1] FIG. 1 shows two side views of a scanbody according to some embodiments of the present invention. [Diagram 2] FIG. 2 shows two side views of a scanbody according to some embodiments of the present invention. [Diagram 3] FIG. 3 shows a cross section along axis AA shown in FIG. 2 of a scanbody according to some embodiments of the present invention. [Figure 4] FIG. 4 shows a side view of two different embodiments of a scanbody characterized by different side openings. [Diagram 5] FIG. 5 shows a side view of two different embodiments of a scanbody characterized by different side openings. [Figure 6] FIG. 6 illustrates a front view of an elongate member according to some embodiments of the present invention. [Figure 7] FIG. 7 illustrates a cross section of the elongate member of FIG. 6 according to some embodiments of the present invention. [Figure 8] FIG. 8 shows a three-dimensional view and a cross-sectional view of the second member according to some embodiments of the present invention before and after the retaining means is secured to the elongate member. [Figure 9] FIG. 9 shows a three-dimensional view and a cross-sectional view of the second member according to some embodiments of the present invention before and after the retaining means is secured to the elongate member. [Figure 10]FIG. 10 shows a three-dimensional view and a cross-sectional view of the second member according to some further embodiments of the invention, before and after the retaining means is fixed to the elongate member. [Figure 11] FIG. 11 shows a three-dimensional view and a cross-sectional view of the second member according to some further embodiments of the invention, before and after the retaining means is fixed to the elongate member. [Figure 12] FIG. 12 shows a three-dimensional view and a cross-sectional view of the second member according to further embodiments of the present invention, before and after the retaining means is secured to the elongate member. [Figure 13] FIG. 13 shows a three-dimensional view and a cross-sectional view of the second member according to further embodiments of the present invention, before and after the retaining means is secured to the elongate member. [Figure 14] FIG. 14 is a three-dimensional view of a retaining means according to some embodiments of the present invention. [Figure 15] FIG. 15 is a three-dimensional view of an elongated member according to some embodiments of the present invention. [Figure 16] FIG. 16 shows a flow chart of a method for assembling a scanbody according to one embodiment of the present invention. [Figure 17] FIG. 17 is a schematic diagram of a scanbody according to some embodiments of the present invention. [Figure 18] FIG. 18 is a schematic cross-sectional view of a scanbody according to some embodiments of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0092] 1 and 2 show two side views of a scanbody 1 according to some embodiments of the present invention.

[0093] The scanbody 1 exhibits geometric features 6 that are recognizable by an optical scanning system for finding the orientation and position of the scanbody.

[0094] 1, three sections of a first hollow member of a scanbody 1 are shown. The first hollow member shows a distal end 3, an intermediate section 4 and a proximal end 5.

[0095] FIG. 3 shows a cross section of the scanbody 1 along the axis AA shown in FIG.

[0096] In FIG. 3, a first hollow member 2 is shown having a distal end 3, an intermediate portion 4 and a proximal end 5.

[0097] The second member 29 is located in the hollow region of the first hollow member 2. The second member 29 comprises an elongated part 8 having an upper portion 10 and an end threaded portion 9. The elongated part 8 is inserted into the hollow region of the first hollow member 2 through the proximal end opening 13.

[0098] Retaining means 11 is fixed to the upper portion 10 of the elongated part 8 so as to retain at least a portion of the elongated part 8 within the first hollow member.

[0099] The holding means 11 is introduced into the hollow region of the first hollow member 2 via the intermediate opening 7 .

[0100] The tip opening 12 allows for the insertion of a fastener such as a driver or a driver tip for fastening the scanbody 1 to a dental implant or an implant analog.

[0101] 4 and 5 show side views of scanbodies 19 and 20, which are characterized by elliptical and rectangular side or middle openings 21 and 22. Middle openings 21 and 22 have suitable shapes to enable them to perform their respective functions.

[0102] 6 and 7 show front and cross-sectional views of elongate member 24 according to some embodiments of the present invention.

[0103] The elongated part 24 is characterized by an upper portion 31 and an end threaded portion 30 .

[0104] 8 and 9 show a three-dimensional view and a cross-sectional view of the second member, the retaining means of which comprises the head part 14. In FIG.

[0105] The head part, i.e. ball head 14, is secured to the top of elongated part 25 by a snap-fit ​​feature. The outer diameter of ball head 14 is larger than the maximum dimension of the proximal end opening and is larger than the maximum dimension of elongated part 25.

[0106] 10 and 11 show a three-dimensional view and a cross-sectional view of a second member in which the retaining means comprises a head part such as a ball head 15. The ball head 15 is configured to engage with the upper part of an elongate part 26.

[0107] The ball head 15 also includes a recess for receiving a fastener through the distal opening.

[0108] 12 and 13 show a three-dimensional view and a cross-sectional view of the second member before and after the retaining means 18 is fixed to the elongate part 27. FIG.

[0109] The retaining means 18 is a ball head having an outer diameter greater than the maximum dimension of the proximal end opening.

[0110] When the ball head 18 is snap-fit ​​onto the top of the elongated part 27, movement along the longitudinal axis of the scanbody is prevented.

[0111] The elongated part 27 has an upper portion configured to engage with a fastener insertable through the distal opening, thereby allowing the scanbody to be fastened to a dental implant or implant analog.

[0112] FIG. 14 is a three-dimensional view of the retaining means which is an open ring 16.

[0113] 15 is a three-dimensional view of the elongated part 28. The release ring 16, when secured to the top of the elongated part 28, retains at least a portion of the elongated part 15 within the first hollow member.

[0114] The elongated part 28 has an upper portion configured to engage a fastener insertable through the distal opening, thereby allowing the scanbody to be fastened to a dental implant or implant analog.

[0115] FIG. 16 shows a flow chart of a method 17 for assembling a scanbody according to one embodiment of the present invention.

[0116] How to Assemble a Scanbody 17

[0117] - S1, i.e. inserting an elongate part of the second member into the first hollow member through the proximal end opening;

[0118] - S2, i.e. inserting the retaining means of the second member into the first member through the central opening;

[0119] - S3, i.e. fastening the retaining means to the upper part of the elongate part by operating through the central opening.

[0120] 17 and 18 are a schematic diagram and a schematic cross-sectional view of a scanbody having a slot-shaped opening 23. FIG.

[0121] Once the elongated part 32 has been introduced through the proximal end opening 33 , the retaining means 34 can be introduced through the slotted opening 23 and fastened to the top of the elongated part 32 .

[0122] Although the present invention has been described with reference to specific embodiments, the present invention should not be construed as being limited in any manner to the examples presented. The scope of the present invention is defined by the appended set of claims. In the context of the claims, the term "comprising" or "comprises" does not exclude other possible elements or steps. Also, references such as "a" or "an" should not be construed as excluding a plurality. The use of reference numbers in the claims for elements shown in the drawings should also not be construed as limiting the scope of the present invention. Furthermore, individual features recited in different claims may be advantageously combined, and the recitation of these features in different claims does not exclude that a combination of features is possible and advantageous.

Claims

1. a scanbody (1, 19, 20) that can be inserted into or onto a dental implant or into or onto an implant analogue and that is recognizable by an optical scanning system arranged to find the orientation and position of the scanbody, a first hollow member (2) having a distal end (3), an intermediate portion (4) and a proximal end (5); said distal end (3) comprises at least one geometric feature (6) recognizable by an optical scanning system; the intermediate part (4) comprises openings (7, 21, 22, 23), a second member (29) for fastening the scanbody to a dental implant or implant analogue, an elongated part (8, 24, 25, 26, 27, 28, 32) having an upper part (10) and an end threaded portion (9), said end threaded portion extending from the proximal end of said first hollow member; retention means (11, 14, 15, 16, 18, 34) for retaining at least a portion of said elongated element within said first hollow member, said retention means (11, 14, 15, 16, 18, 34) fastening to said upper portion of said elongated element; a second member (29) comprising: Equipped with the distal end and the proximal end have openings (12, 13) along the longitudinal axis of the scanbody, the intermediate openings (7, 21, 22, 23) are configured to allow the retention means of the second member to be inserted into the first hollow member, the retention means having at least one dimension greater than the largest dimension of the cross-sections of the distal end and the proximal end openings (12, 13), the cross-sections being perpendicular to the longitudinal axis, thereby retaining at least a portion of the elongated part (8, 24, 25, 26, 27, 28, 32) within the first hollow member, and the distal end opening (12) is configured to allow the insertion of a fastener. Scanbody (1, 19, 20).

2. 2. The scanbody (1, 19, 20) of claim 1, wherein the central opening (7, 21, 22, 23) has at least one dimension greater than the largest dimension of the cross-section of the tip and the proximal end openings (12, 13), the cross-section being perpendicular to the longitudinal axis.

3. 2. The scanbody (1, 19, 20) according to claim 1, wherein the intermediate opening (7, 21, 22, 23) is configured to allow cleaning of a hollow area within the first hollow member, thereby allowing cleaning of the hollow area accessible through the intermediate opening.

4. 2. The scanbody (1, 19, 20) according to claim 1, wherein the intermediate opening (7, 21, 22, 23) is configured to allow fastening of a safety means, such as a safety thread, thereby preventing mispositioning of the scanbody during use.

5. 2. The scanbody (1, 19, 20) according to claim 1, wherein the proximal end opening (13) is configured to allow insertion of the elongated part (8, 24, 25, 26, 27, 28, 32) before fastening the holding means (11, 14, 15, 16, 18).

6. The scanbody (1, 19, 20) according to claim 1, wherein the holding means (11, 14, 15, 16, 18, 34) comprises a head part.

7. 2. The scanbody (1, 19, 20) according to claim 1, wherein the head part (11, 14) or the upper part of the elongated part (8, 24, 25, 26, 27, 28, 32) is configured to engage with a fastener insertable through the distal end opening, thereby enabling the scanbody to be fastened to a dental implant or an implant analog.

8. 2. The scanbody (1, 19, 20) according to claim 1, wherein the holding means (11, 14, 15, 16, 18, 34) is configured to engage the top part (10) of the elongated part.

9. 2. The scanbody (1, 19, 20) according to claim 1, wherein the holding means (11, 14, 15, 16, 18, 34) is or comprises a ball or a cylindrical head (14, 15) configured to engage with the top of the elongated part.

10. 2. The scanbody (1, 19, 20) according to claim 1, wherein the retaining means is or includes a ring (16) surrounding the upper portion of the elongated part, the ring being configured to retain at least a portion of the elongated part (8, 24, 25, 26, 27, 28, 32) within the first hollow member.

11. The holding means one or more external protrusions on the retaining means configured to be press-fitted onto the top of the elongate part; one or more external protrusions on the top portion of the elongate element configured to be press-fit into the retaining means; By adhesive, By laser welding, by the corresponding threads on the retaining means and the upper portion.

11. The scanbody (1, 19, 20) according to claim 1, wherein the scanbody (1, 19, 20) is fastened to the upper part of the elongated part by at least one of the following means:

12. A method (17) for assembling a scanbody according to any of the preceding claims, comprising: inserting the elongated part (8, 24, 25, 26, 27, 28, 32) of the second member into the first hollow member through the proximal end opening; inserting the retaining means of the second member into the first member through the intermediate opening; fastening said retaining means to said upper portion of said elongated member by operating through said middle opening; A method (17) comprising:

13. The method of claim 12, wherein the fastening is by laser welding, adhesive, threading, press fit, snap fit or interference fit.

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