Device for mechanically attaching connective tissue of an animal

Abstract

The invention relates to a device (1) for mechanically attaching a first connective tissue (11) of the body of an animal, in particular of the human body or of the body of a mammal, to a second connective tissue (12) of said body, the mechanical attachment device (1) comprising: • - an interface part (2), • - at least one element (3, 6; 7, 8) for attaching the interface part (2) to a second connective tissue (12) of the body, • - at least one removable element (9) for attaching a wire (4) to the interface part (2), and • - a cover (102) covering the interface part (2) so as to form a housing containing the at least one removable attachment element (9).

Description

[0001] DESCRIPTION

[0002] TITLE: Device for the mechanical fixation of connective tissue in an animal.

[0003] The invention relates to a device for mechanically fixing a first connective tissue, such as a muscle, from the body of a mammal or more generally an animal, to a second connective tissue of that body, such as a muscle, bone, tendon, or ligament. The invention further relates to a method for positioning and configuring the aforementioned fixing device.

[0004] In the surgical field, particularly in reconstructive or plastic surgery, it is sometimes necessary to implement methods to tighten a muscle or group of muscles. Such an intervention is time-consuming. Furthermore, it is often difficult to make fine adjustments to muscle tension during surgery or afterward, in a subsequent surgical procedure.

[0005] The object of the invention is to provide a device for the mechanical fixation of a first connective tissue of an animal's body to a second connective tissue of the same animal's body, and a method for configuring and positioning such a device, remedying the above-mentioned drawbacks and improving upon devices and methods known in the prior art. In particular, the invention proposes a simple device that makes the aforementioned surgical procedures more practical and faster.

[0006] According to the invention, a mechanical fastening device is defined by claim 1. Different embodiments of the device are defined by claims 2 to 12.

[0007] According to the invention, a method is defined by claim 13.

[0008] Different modes of execution of the process are defined by claims 14 and 15.

[0009] The attached drawing represents, by way of example, different embodiments of a fastening device according to the invention.

[0010] Figure 1 represents a first embodiment of a mechanical fixation device for a first connective tissue.

[0011] Figure 2 represents the first embodiment of the fixation device implanted on a patient.

[0012] Figure 3 represents a second embodiment of a mechanical fixation device for a first connective tissue.

[0013] Figure 4 represents the second embodiment of the fixation device implanted on a patient.

[0014] Figure 5 is a perspective view of a first embodiment of a removable wire fixing element, a wire being fixed by the element.

[0015] Figure 6 is a cross-sectional view of the first embodiment of a removable wire fixing element along plane AA of Figure 5.

[0016] Figure 7 is a perspective view of a second embodiment of a removable wire fixing element, without wire fixed by the element.

[0017] Figure 8 is a perspective view of the second embodiment of a removable wire fixing element, a wire being fixed by the element.

[0018] Figure 9 is a cross-sectional view of the second embodiment of a removable wire fixing element along plane AA of Figure 8. Figure 10 is a perspective view of part of a third embodiment of a mechanical fixing device.

[0019] Figure 11 is a perspective view of the third embodiment of the mechanical fastening device.

[0020] Figure 12 is a perspective and cross-sectional view along plane BB of Figure 11 of the third embodiment of the mechanical fastening device.

[0021] A first embodiment of a mechanical fixation device 1: - of at least one first connective tissue 11 of the body of an animal, in particular the human body or the body of a mammal,

[0022] - to at least a second connective tissue 12 of this same body is described below with reference to figures 1 and 2.

[0023] Regardless of the method of implementation and the variant, at least one first connective tissue may include or comprise:

[0024] - a muscle, and / or

[0025] - a fascia, and / or

[0026] - a tendon, and / or

[0027] - cartilage, and / or

[0028] - the dermis, and / or

[0029] - the hypodermis.

[0030] Regardless of the embodiment and variant, at least one second connective tissue may include or comprise:

[0031] - a muscle, and / or

[0032] - a fascia, and / or

[0033] - a tendon, and / or

[0034] - cartilage, and / or

[0035] - a ligament, and / or

[0036] - a bone, and / or - a periosteum, and / or

[0037] - a perichondrium.

[0038] This fixation device allows for the application of tension or pre-stress to the first connective tissue 11 or to different first connective tissues 11. This enables aesthetic, therapeutic, or reconstructive treatments to be performed on a patient's body. In particular, it allows for the modification of facial expression in patients with facial hemiplegia. It also allows for the support or suspension of organs, such as breast tissue, buttock muscles, or abdominal muscles. It is also used to correct muscle hernias.

[0039] Preferably, regardless of the embodiment, the mechanical fastening device 1 comprises:

[0040] - an interface piece 2,

[0041] - at least one element 3, 6 for fixing the interface piece 2 to the second connective tissue 12 of this body,

[0042] - at least one removable fixing element 9 for a wire 4 to the interface piece 2, and

[0043] - a cover covering the interface part 2 so as to form a housing containing at least one removable fixing element 9 or a cover forming, with the interface part 2, a housing containing at least one removable fixing element 9.

[0044] The lid is not shown in figures 1 to 9.

[0045] Preferably, the interface piece 2 can be a plate, in particular: - a flat or substantially flat plate, or

[0046] - a convex plate, or

[0047] - a concave plate, or

[0048] - a left-hand plate. The mechanical fastening device 1 may also include:

[0049] - at least one first mechanical bonding thread 4 intended to be fixed to the first connective tissue 11 or to several first connective tissues 11, and - at least one first needle 5.

[0050] In figure 1, the first four threads 4 are shown.

[0051] Each mechanical connecting wire may include:

[0052] - a proximal end 41 fixed, in particular knotted, to the interface piece 2, and

[0053] - a distal end 42 fixed, in particular knotted, to a first needle 5.

[0054] Interface piece 2 can have any shape. Its function is to provide an interface between:

[0055] - a first connective tissue 11 or several first connective tissues 11 on which it will exert a tensile force or forces, and

[0056] - a second connective tissue 12 or several second connective tissues 12 to which it will be fixed so that this / these second tissue(s) can mechanically take over the tensile force.

[0057] The interface piece is preferably rigid in the sense that, under normal use—that is, when the device 1 is fixed to the body and the aforementioned forces are applied to the interface piece—no significant deformation of the interface piece is visible to the naked eye. This does not preclude the interface piece from being flexible before its attachment to the body or for the purpose of providing a removable attachment for a wire 4 by deforming a portion of the interface piece 2.

[0058] In the first embodiment, the interface piece 2 is a plate, in particular: - a flat or substantially flat plate, or

[0059] - a convex plate, or

[0060] - a concave plate, or

[0061] - a left-hand plate.

[0062] Alternatively, the interface piece 2 can be annular in shape. In both cases, the perimeter of the interface piece can be any geometric shape, including:

[0063] - of a circle,

[0064] - of ellipsis,

[0065] - of triangle,

[0066] - of a rectangle, or

[0067] - of square.

[0068] In the first embodiment, the interface piece 2 is a circular plate.

[0069] Interface part 2 can be made of a biocompatible material, for example:

[0070] - made of surgical-grade stainless steel, or

[0071] - in titanium alloy, or other or

[0072] - made of plastic or synthetic material, or

[0073] - made of ceramic material.

[0074] Interface piece 2 can perform another complementary function. In particular, interface piece 2 can function as a prosthesis. Interface piece 2 can therefore be a prosthesis, specifically a bioprosthesis, or a prosthetic component, specifically a bioprosthesis component.

[0075] The interface piece 2 can be adapted to the morphology of the body to which it is to be attached, or it can be designed for the morphology of the body to which it is to be attached. For example, measurements can be taken on the body and the interface piece can be custom-made. The interface piece can, in particular, be produced for this purpose using three-dimensional printing (3D printing).

[0076] In this first embodiment, the at least one fastening element 3 comprises at least one second thread 3 and at least one second needle 5. The second thread 3 comprises:

[0077] - a proximal end 31 fixed, in particular knotted, to the interface piece 2, and

[0078] - a distal end 32 fixed, in particular knotted, to the second needle 5.

[0079] The use, setup, and configuration of a device 1, as previously mentioned, are described below. The installed device is illustrated in Figure 2.

[0080] The procedure for using device 1 or for setting up and configuring device 1 includes:

[0081] (a) a first step of fixing the interface piece 2 to the second connective tissue 12,

[0082] (b) a second step of fixing all the threads 4 to the first connective tissue 11 or to several first connective tissues 11, or a second step of fixing one or some of the threads 4 to the first connective tissue 11 or to several first connective tissues 11 and possibly removing the unused mechanical bonding thread(s) 4,

[0083] (c) a third step of fitting the cover 102 onto the interface piece 2, this fitting being carried out by clipping or screwing or any other means,

[0084] the second step comprising a removable attachment of one or more wires 4 to the interface piece 2. Preferably, before step (c) of setting up the cover 102, the surgeon applies a paste, such as a biocompatible paste and / or an ointment with or without antibiotic, intended to fill the housing.

[0085] In the first step (a), the interface piece is fixed by means of the second wire(s) 3 which is / are passed through the second connective tissue 12. The second wire(s) may / may have been previously knotted at their proximal ends 31 to the interface piece 2 at hole(s) 6. This / these second wire(s) may also be knotted, at their distal end(s) 32, at the level of the second connective tissue 12 or at a hole 6 provided in the interface piece 2. Alternatively, the second wire(s) may / may be fixed removably to the interface piece 2 via a removable fixing element 9.

[0086] In the second step (b), the interface piece 2 is attached to the first connective tissue(s) 12 by means of the first thread(s) 4 which is / are passed through the first connective tissue(s) 12. This first thread 4 or these first threads 4 are / are permanently attached to the interface piece 2 at their proximal ends 41, for example by tying the proximal ends 41 to holes 6 made in the interface piece 2. In addition, this first thread 4 or these first threads 4 are / are attached at their distal ends 42 to the interface piece 2 via one or more removable fastening elements 9. The first threads 4 are, for example, removably fixed by wedging and / or butting.

[0087] In this first and / or second step, if a surgeon uses a device 1 with too many first sutures 4 and / or too many second sutures 3, they can simply, in a first removal operation, remove (by cutting) the sutures they do not wish to use. This removal operation can be performed before or after the remaining first and / or second sutures have been fixed to the connective tissue(s). Alternatively, in this first and / or second step, if a surgeon uses a device 1 with not enough first sutures 4 and / or not enough second sutures 3, they can simply, in a second addition operation, add more by fixing them (in particular by tying a knot) to the interface piece 2. This addition of sutures can be performed before or after the remaining first and / or second sutures have been fixed to the connective tissue(s).

[0088] The first and second steps mentioned above can be performed in any order. Preferably, however, the first step (a) is carried out before the second step (b). Alternatively, it is possible to alternately attach the first threads to the first fabric(s) and the second threads to the second fabric(s).

[0089] Initial procedures to add or remove sutures can be performed during a second surgical intervention, delayed in time from the initial surgery in which the fixation device was placed on the body. This could occur, for example, several months or several years after the first surgery. In such a case, one can:

[0090] - add one or more first and / or second threads that were not put in place during the first surgical procedure, and / or - remove one or more first and / or second threads put in place during the first surgical procedure.

[0091] Thanks to the removable fixation element 9, the tension and / or length of the first wire 4 can be finely adjusted during the initial surgical procedure. Specifically, the surgeon can correctly adjust the tension of the first wire 4 by performing various fixation trials. The removable nature of the fixation element 9 makes these trials both possible and practical. Furthermore, these adjustments can be made not only during the initial surgical procedure but also during a subsequent surgical procedure performed at a later time after the first procedure, during which the fixation device was placed on the body. These adjustments involve a step of releasing the first wire 4 from the removable fixation element 9, followed by a step of reattaching the wire 4 to the interface piece 2.

[0092] In a second embodiment described with reference to Figures 3 and 4, the mechanical fastening device 1 differs in that:

[0093] - Interface piece 2 is a rectangular plate, and

[0094] - at least one fixing element 3 includes at least one hole 7 for the passage of a screw 8.

[0095] In this second embodiment, the mechanical fastening device 1 may also include second wires 3 or not include such wires.

[0096] In the described embodiment, at least one fixing element 3 includes two screw holes 7 made in the interface plate 2. In Figure 4, the screw heads 8 can be seen being screwed, for example into a bone 12.

[0097] In a third embodiment described with reference to Figures 10 to 12, the mechanical fastening device 1 differs from the first and second embodiments in that the interface piece 2 has a hollow shape.

[0098] Regardless of the embodiment and variant, the interface piece 2 may include several holes 6 for fixing wires 3, 4 at their proximal ends 31, 41. Regardless of the embodiment, the interface piece 2 may also include several holes 6 for fixing wires 3 at their distal ends 32.

[0099] In the first and second embodiments, four first wires 4 and two first wires 2 have been shown respectively. However, regardless of the embodiment and variant, device 1 may include 1, 2, 3, 4, 5, 6, 7, 8, or 9 first wires 4 or more.

[0100] In the first embodiment, a second thread 3 is shown. However, in this first embodiment, regardless of the variant, the device 1 can include 2, 3, 4, 5, 6, 7, 8, or 9 or more second threads 3. As with the first threads, during use, if the surgeon uses a device 1 with too many second threads 3, they can simply remove (by cutting) the second threads 4 that they do not wish to use. This removal operation can be performed before the other second threads are fixed to the interface or connective tissue.

[0101] In another embodiment not shown, the fixing may be mixed, that is to say that at least one fixing element 3 may comprise:

[0102] - at least a second wire 3, and

[0103] - at least one hole 7 for the passage of a screw 8.

[0104] Regardless of the method of execution and the variant, the first and second threads can have any type of needle combination at their distal ends, including

[0105] - curved needles as shown in figures 1 and 3,

[0106] - straight needles, or

[0107] - any combination of curved and straight needles. Regardless of the method and variation, threads 3 and 4 can be:

[0108] - absorbable, or

[0109] - non-absorbable, or

[0110] - any combination of absorbable and non-absorbable thread(s).

[0111] Regardless of the embodiment and variant, at least one fastening element 3 may include any mechanical fastening means. Alternatively, to the means previously described, at least one fastening element 3 may include:

[0112] - a clipping system for attaching to connective tissue, and / or

[0113] - a tight-fitting or forced conformation in a conformation present or made on rigid connective tissue.

[0114] Regardless of the embodiment and variant, at least one fixing element of the interface part 2 may include a through hole 7 for a fixing screw 8.

[0115] Regardless of the embodiment and variant, the device may include at least one element 6 for permanently fixing a wire 4 to the interface piece 2.

[0116] Regardless of the embodiment and variant, at least one permanent wire fixing element 4 may include a wire knotting hole 6 4.

[0117] Regardless of the embodiment and variant, the mechanical fastening device 1 may comprise a single interface piece 2 and several removable wire fastening elements 9 to the interface piece 2.

[0118] A first embodiment of a removable wire fixing element 9 is described below with reference to Figures 5 and 6. The removable fixing element 9 comprises:

[0119] - an opening 21 or a hole 21 made in the interface element 2, and - a cover 91 or a plug 91 intended to plug the opening or hole while jamming the wire 4.

[0120] Preferably, the lid or cap comprises a head 93 and a body 94.

[0121] The removable fastening element 9 is installed by passing the wire 4 through the opening and then wedging the lid or cap into the opening. Preferably, the wire 4 is passed from one side of the opening and the lid or cap is inserted from a second side. Thus, when tension is applied to the wire 4, the forces tend to pull the cap or lid, particularly the body 94 of the cap, into the opening and / or increase the wedging of the wire 4, especially between the head 93 of the cap and the interface piece 2.

[0122] Preferably, the sides 22 of the opening 21 and / or the surface 92 of the body 93 of the plug 91 may have non-smooth surfaces, in particular wavy or striated, which increase the friction forces on the wire 4 and improve the holding of the wire 4 in place.

[0123] Alternatively, the cap 91 or the cover 91 can be hinged on a surface of the interface part 2, in particular along an axis parallel to a surface of the interface part.

[0124] Alternatively, the plug 91 or the cover 91 can comprise several bodies 94, connected by the same head 93, allowing several openings 21 to be plugged simultaneously and thus several wires 4 to be held together simultaneously. A second embodiment of a removable wire fixing element 9 is described below with reference to figures 7 to 9.

[0125] The removable fixing element 9 includes a tab 95 or a flap 95 made on the interface piece 2. Simply, the tab 95 can be made by a simple U-shaped cut made in the interface piece 2, which is for example a plate.

[0126] The tab 95 is articulated on the interface piece 2 and returned to a rest position such as for example shown in figure 7. In the case of a tab cut out of the interface piece 2, the articulation is achieved by bending the tab 95.

[0127] The tab 95 includes an edge 98 which cooperates with an edge 28 of the interface piece to clamp the wire 4, as shown in figures 8 and 9.

[0128] Advantageously, the interface piece 2 has an opening 96 adjacent to the tab 95. This opening 96 allows the wire 4 to pass through the interface piece, before being clamped by the tab 95. The opening can extend along one lateral wing of the U-shaped cutout.

[0129] Advantageously, the edge 98 can have a chamfer 97 to facilitate and improve the guidance of the wire 4 towards its locking position by the tab 95. Indeed, the surgeon can pass the wire 4 through the opening 96, then pull the wire 4 into the chamfer 97, before locking the wire 4 between the edges 98 and 28.

[0130] Removable fastener element 9 may include:

[0131] - bits or jaws 104a, 104b, in particular such bits or jaws may be constituted by an edge 104a of the tongue 95 and an edge 104b of the rim 28, and

[0132] - an elastic return element 103a, in particular the tongue body 95.

[0133] The elastic return element 103a can be arranged to pinch the wire 4 by returning the movable jaw 104a towards the fixed jaw 104b in order to pinch the wire 4.

[0134] The first jaw 104a can be movable relative to the interface piece 2 and is linked to the interface piece 2 by the elastic return element 103a.

[0135] The second jaw 104b can be fixed relative to the interface piece 2. A third embodiment of a removable wire fixing element 9 is described below with reference to figures 10 to 12.

[0136] In the third embodiment, at least one removable fastening element 9 may include:

[0137] - bits or jaws 104a, 104b, and

[0138] - at least one elastic return element 103a, 103b,

[0139] at least one elastic return element 103a, 103b is arranged to pinch the wire 4 by bringing the jaws 104a, 104b together so as to pinch the wire 4

[0140] At least one removable fastener element (9) may include:

[0141] - a first jaw 104a movable relative to the interface piece 2 and linked to the interface piece 2 by a first elastic return element 103a, such as a flexible blade 103a fixed to the interface piece 2, in particular at the level of an axis 107a, and

[0142] - a second jaw 104b movable relative to the interface piece 2 and linked to the interface piece 2 by a second elastic return element 103b, such as a flexible blade 103b fixed on the interface piece 2, in particular at the level of an axis 107b.

[0143] The jaws preferably have faces elastically drawn towards each other to pinch the wire 4. The faces may have striations 106.

[0144] Regardless of the embodiment or variant, the housing defines a space E. This space is filled with a paste, such as a biocompatible paste and / or an ointment with or without antibiotics.

[0145] Regardless of the embodiment or variant, at least one removable wire fixing element 9 for the wire 4 may include a locking element 91, 95, such as:

[0146] - a flap 95 or a tab 95 or a cover 91 hinged or pivoted on the interface piece 2, or

[0147] - a 91 cap.

[0148] Regardless of the embodiment or variant, at least one removable fixing element 9 can be arranged to tighten the thread when traction is applied to the thread strand connected to the first connective tissue 11, in the direction C shown in Figure 10.

[0149] Regardless of the embodiment or variant, at least one removable fastening element 9 can be arranged to release the thread when tension is applied to the thread strand not connected to the first connective tissue 11, i.e., when tension is applied to the distal end 42 of the thread 4, in the direction D shown in Figure 10. Furthermore, at least one removable fastening element 9 can be arranged to clamp the thread when tension is released on the thread strand not connected to the first connective tissue 11, i.e., when tension is released on the distal end 42 of the thread 4. The tension on the thread strand connected to the first connective tissue 11 causes the jaws to brace, tending to lock the thread.

[0150] Regardless of the embodiment or variant, the interface piece 2 preferably has a thickness e of less than 2 mm or less than 1 mm or less than 0.8 mm or less than 0.5 mm.

[0151] Regardless of the embodiment or variant, the cover 102 preferably has a thickness of less than 2 mm or less than 1 mm or less than 0.8 mm or less than 0.5 mm.

[0152] Regardless of the embodiment or variant, the removable fixing element 9 preferably has a thickness of less than 2 mm or less than 1 mm or less than 0.8 mm or less than 0.5 mm.

[0153] Thus, the mechanical fastening device may have a thickness of a few millimeters, in particular about 2 mm or less.

[0154] In this document, a thread tied to a part is considered to be permanently attached to that part. Indeed, the thread must be cut to break this connection.

[0155] The solutions described above ensure the removability of the thread fixation. In particular, encapsulating a fixation element in a housing prevents fibrosis at the thread fixation point (which can trap the thread in tissue) and allows for easy modification of the thread fixation even after a long period, for example, several years. Filling the housing with a paste further prevents fibrosis at the thread fixation point inside the housing. According to another aspect of the invention, objects are defined by the following propositions.

[0156] 1. A mechanical fixation device (1) of a first connective tissue (11) of the body of an animal, in particular the human body or the body of a mammal, to a second connective tissue (12) of that body, the mechanical fixation device (1) comprising:

[0157] - an interface piece (2),

[0158] - at least one element (3, 6; 7, 8) for attaching the interface piece (2) to a second connective tissue (12) of this body, and

[0159] - at least one removable fastening element (9) for a wire (4) to the interface piece (2), and

[0160] - a cover (102) covering the interface piece (2) so as to form a housing containing at least one removable fastening element (9).

[0161] 2. Device according to Proposition 1, characterized in that the interface piece (2) is a plate, in particular:

[0162] - a flat or nearly flat plate, or

[0163] - a convex plate, or

[0164] - a concave plate, or

[0165] - a left-hand plate.

[0166] 3. Device according to one of the preceding proposals, characterized in that at least one fixing element of the interface piece (2) includes a through hole (7) for a fixing screw (8).

[0167] 4. Device according to one of the preceding proposals, characterized in that the device comprises at least one element (6) for permanently fixing a wire (4) to the interface piece (2). 5. Device according to the preceding proposal, characterized in that the at least one permanent fixing element (4) of the wire comprises a knotting hole (6) for the wire (4).

[0168] 6. Device according to one of the preceding propositions, characterized in that at least one removable fastening element (9) for the wire (4) comprises a locking element (91; 95) such as, for example:

[0169] - a flap (95) or a tab (95) or a cover (91), hinged or pivoted on the interface piece (2), or

[0170] - a cork (91).

[0171] 7. Device according to proposition 5 or 6, characterized in that at least one removable fixing element (9) is arranged to tighten the thread when traction is applied to the strand of thread connected to the first connective tissue (11).

[0172] 8. Device according to any one of Propositions 5 to 7, characterized in that at least one removable fixing element (9) is arranged to release the wire (4) when traction is applied to the distal end (42) of the wire (4).

[0173] 9. Method for installing and configuring a mechanical fastening device (1) according to one of the preceding proposals, the method comprising:

[0174] - a step of fixing the interface piece (2) onto a second connective tissue (12) of an animal body, in particular the human body,

[0175] - a step of attaching a thread (4) to a first connective tissue (11) of an animal's body, and

[0176] - a step of removably attaching the wire (4) to the interface piece (2). The method according to the preceding proposal comprises: - a step of releasing the wire (4), in particular by pulling on a distal end (42) of the wire (4), and

[0177] - a step of re-removable fixing of the wire (4) to the interface piece (2), in particular by releasing the tension exerted on a distal end (42) of the wire (4).

Claims

DEMANDS 1. A mechanical fixation device (1) of a first connective tissue (11) of the body of an animal, in particular the human body or the body of a mammal, to a second connective tissue (12) of that body, the mechanical fixation device (1) comprising: - an interface piece (2), - at least one element (3, 6; 7, 8) for attaching the interface piece (2) to a second connective tissue (12) of this body, - at least one removable fastening element (9) for a wire (4) to the interface piece (2), and - a cover (102) covering the interface piece (2) so as to form a housing containing at least one removable fastening element (9) or a cover (102) forming, with the interface piece (2), a housing containing at least one removable fastening element (9).

2. Device according to claim 1, characterized in that at least one removable fastening element (9) comprises: - bits or jaws (104a, 104b), and - at least one elastic return element (103a, 103b), at least one elastic return element (103a, 103b) being arranged to pinch the wire (4) by returning the jaws (104a, 104b) against each other.

3. Device according to claim 2, characterized in that at least one removable fastening element (9) comprises: - a first jaw (104a) movable relative to the interface piece (2) and linked to the interface piece (2) by a first elastic return element (103a), and - a second jaw (104b) fixed relative to the interface piece (2).

4. Device according to claim 2, characterized in that at least one removable fastening element (9) comprises: - a first jaw (104a) movable relative to the interface piece (2) and linked to the interface piece (2) by a first elastic return element (103a), and - a second jaw (104b) movable relative to the interface piece (2) and linked to the interface piece (2) by a second elastic return element (103b).

5. Device according to any one of the preceding claims, characterized in that the housing defines a space (E) filled by a paste, such as a biocompatible paste and / or an ointment with or without antibiotic.

6. Device according to any one of the preceding claims, characterized in that the interface piece (2) is a plate, in particular: - a flat or nearly flat plate, or - a convex plate, or - a concave plate, or - a left-hand plate.

7. Device according to any one of the preceding claims, characterized in that at least one fixing element of the interface piece (2) includes a through hole (7) for a fixing screw (8).

8. Device according to any one of the preceding claims, characterized in that the device comprises at least one element (6) for permanently fixing a wire (4) to the interface piece (2).

9. Device according to the preceding claim, characterized in that at least one permanent wire fastening element (4) comprises a knotting hole (6) for the wire (4).

10. Device according to any one of the preceding claims, characterized in that at least one removable wire fastening element (9) comprises a locking element (91; 95) such as, for example: - a flap (95) or a tab (95) or a cover (91), hinged or pivoted on the interface piece (2), or - a cork (91).

11. Device according to any one of the preceding claims, characterized in that at least one removable fixing element (9) is arranged to tighten the thread when traction is applied to the strand of thread connected to the first connective tissue (11).

12. Device according to any one of the preceding claims, characterized in that at least one removable fastening element (9) is arranged to release the wire (4) when traction is applied to the distal end (42) of the wire (4).

13. A method for installing and configuring a mechanical fastening device (1) according to any one of the preceding claims, the method comprising: - a step of fixing the interface piece (2) onto a second connective tissue (12) of an animal body, in particular the human body, - a step of attaching a thread (4) to a first connective tissue (11) of an animal's body, - a step of removable fixing of the wire (4) to the interface piece (2), and - a step of placing the cover (102) on the interface piece (2).

14. A method according to the preceding claim, characterized in that the method comprises, before the step of putting on the lid(102), a step of applying a paste, in particular a biocompatible paste, intended to fill the casing.

15. A method according to any one of claims 13 to 14, the method comprising: - a step of releasing the wire (4), in particular by pulling on a distal end (42) of the wire (4), and - a step of new removable attachment of the wire (4) to the interface piece (2), in particular by releasing the tension exerted on a distal end (42) of the wire (4).

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