A hip cup and a tool set therefor

Abstract

The application discloses a hip cup and a matched tool thereof, which comprises a hip cup, a fine adjustment assembly, a liner and a tool. The hip cup is arranged at the outermost side, and a first opening is arranged on the inner side of the bottom of the hip cup and connected with the fine adjustment assembly; the fine adjustment assembly is arranged between the hip cup and the liner, and comprises a fixed part and an adjusting part; the fixed part is provided with a second opening, and a connecting part is pushed into the first opening of the hip cup to be connected and fixed through the second opening; the inner side of the fixed part is provided with a sliding rail and a fourth connecting part; the adjusting part is a circular ring, the outer surface of the adjusting part is provided with a sliding ball in contact with the sliding rail, a first sawtooth is arranged on the upper surface of the adjusting part, a worm is arranged in mesh with the first sawtooth, gears and a fifth connecting part are symmetrically arranged at the two ends of the worm respectively, the fifth connecting part is hingedly connected with the fourth connecting part on the fixed part to support the worm; and the outer surface of the liner is provided with a second sawtooth in mesh with the gear on the adjusting part, so that the liner is deflected.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to an acetabular cup prosthesis. Background Technology

[0002] Total hip arthroplasty is an effective treatment for end-stage hip joint diseases (such as osteoarthritis, avascular necrosis of the femoral head, rheumatoid arthritis, severe fractures, etc.). Its core goals are to relieve pain, restore joint function, and improve patients' quality of life. A standard total hip arthroplasty mainly consists of two parts: the femoral stem (with the femoral head) and the acetabular cup (with a liner). The acetabular cup is fixed within the patient's acetabulum, and its liner forms the articular interface with the femoral head, enabling smooth hip joint movement.

[0003] Currently, most acetabular cup systems widely used in clinical practice employ a fixed-angle design. This means that after the acetabular cup shell is implanted, the relative angles (mainly the abduction and anteversion angles) between the liner and the shell are fixed and determined once by the locking mechanism between the liner and the cup shell (such as a tapered interface or snap-fit ​​structure). During surgery, the surgeon indirectly achieves the desired joint angle by adjusting the implantation position of the acetabular cup shell. However, this fixed-angle design has significant limitations: low tolerance for implantation angle errors, inability to achieve individualized precise matching, complex and invasive revision surgeries, and poor adjustment flexibility. Therefore, there is an urgent need in the field for an acetabular cup system that can overcome these shortcomings. An ideal design should still provide the ability to fine-tune the liner angle after the acetabular cup shell is implanted. This allows the surgeon to precisely adjust the liner angle based on the patient's actual anatomy and activity level after confirming initial stability of the cup shell. Summary of the Invention

[0004] The main objective of this invention is to provide an acetabular cup and its matching tools to solve the problem that the angle of the liner cannot be finely adjusted in the existing acetabular cup prosthesis.

[0005] To achieve the above objectives, the present invention provides an acetabular cup, specifically comprising: an acetabular cup having three first openings evenly distributed on the inner side of its bottom; a fine-tuning component comprising a fixing part and an adjusting part, the fixing part being composed of a shell and a bottom ring, the lower outer surface of the fixing part having three second openings evenly distributed, each second opening containing a connecting component that connects to the acetabular cup; the connecting component comprising a first connecting part, a second connecting part, and a third connecting part; a slide rail being provided on the inner side of the bottom of the fixing part, and a fourth connecting part being provided inside the fixing part; the adjusting part being... The adjustment part is circular and connected to the slide rail of the fixed part via sliding balls evenly arranged on the outer surface of the adjustment part. The upper surface of the adjustment part is evenly provided with first serrations. The adjustment part is provided with a worm gear that meshes with the first serrations. Gears are symmetrically arranged at both ends of the worm gear. The worm gear is also symmetrically provided with a fifth connecting part in the shape of a cylinder. The worm gear is hinged to the fourth connecting part through the fifth connecting part. The bottom surface of the adjustment part is evenly provided with three third openings in the shape of triangular blocks. A liner is provided with a second serration on one side of the outer surface of the liner. The second serration meshes with the gears in the adjustment part.

[0006] Furthermore, the bottom diameter of the fixing part is the same as the inner diameter of the acetabular cup, and the size and shape of the upper outer shell are the same as the inner surface of the acetabular cup; the bottom diameter of the adjusting part is the same as the inner diameter of the fixing part; the bottom diameter of the liner is the same as the inner diameter of the adjusting part, and its outer surface is in contact with the inner surface of the fixing part; therefore, the fine-tuning component is set between the acetabular cup and the liner, which helps to enhance the overall mechanical properties of the acetabular cup prosthesis.

[0007] Furthermore, the first connecting part of the connecting component is crescent-shaped, which facilitates the connection of the fixing part to the acetabular cup; the second connecting part is cylindrical and fixedly connected to the first connecting part; the third connecting part is cylindrical with a diameter larger than that of the second connecting part and is fixedly connected to the second connecting part, so that the first connecting part can be pushed into the first opening in the acetabular cup.

[0008] Furthermore, the number of the first opening and the second opening are the same. The shape of the first opening is a crescent-shaped channel consistent with the shape of the first connecting part. The upper part of the second opening is a crescent-shaped channel consistent with the shape of the first connecting part, and the lower part is a crescent-shaped channel consistent with the diameter of the second connecting part, so that the connecting part can be pushed into the first opening through the second opening to realize the connection and fixation of the fixing part and the acetabular cup.

[0009] Furthermore, the sliding ball is a hemisphere with the same diameter as the aforementioned slide rail, allowing the adjustment part to rotate without dislodging from the acetabular cup prosthesis.

[0010] Furthermore, the gear is a half gear, and the half gear has evenly distributed tooth grooves, so that the tooth grooves can match the second serrations on the liner, while avoiding excessive offset of the liner angle.

[0011] Furthermore, the threads on the worm have different pitches, thus allowing precise control of the gasket's deflection angle to be achieved using worms with different pitches.

[0012] Furthermore, according to another aspect of the present invention, an adjustment tool is provided for adjusting a fine-tuning component, comprising: a push rod and a sleeve, the push rod being a hollow shell, a buckle being provided on the push rod, a spring being provided inside the push rod and connected to the buckle, and a ball head being provided on the push rod, the diameter of the ball head being the same as the diameter of the aforementioned pad; the sleeve being fitted onto the push rod, and three first fixing blocks being evenly distributed on the sleeve, each first fixing block containing a rotating rod and having a sixth connecting part hinged to the rotating rod, the sixth connecting part having a second fixing block, the second fixing block being a triangular block, the shape and size being the same as the aforementioned third opening.

[0013] According to the technical solution of this invention, an acetabular cup and its matching tools include an acetabular cup, a fine-tuning component, a liner, and tools. The acetabular cup is located on the outermost side, and a first opening is provided on the inner side of its bottom to connect with the fine-tuning component. The fine-tuning component is located between the acetabular cup and the liner. The fine-tuning component includes a fixing part and an adjusting part. The fixing part has a second opening, and a connecting component is pushed into the first opening on the acetabular cup through the second opening for connection and fixation. A slide rail and a fourth connecting part are provided on the inner side of the fixing part. The adjusting part is a ring, and a sliding ball is provided on its outer surface to contact the slide rail, allowing the adjusting part to rotate. A first serration is provided on the upper surface of the adjusting part, and a worm gear meshes with the first serration. Gears and a fifth connecting part are symmetrically provided at both ends of the worm gear. The fifth connecting part is hinged to the fourth connecting part on the fixing part, thereby supporting the worm gear. A second serration is provided on one side of the outer surface of the liner to mesh with the gear on the adjusting part, thereby achieving deflection of the liner.

[0014] Therefore, the technical solution of this application can achieve precise adjustment of the liner angle in the acetabular cup prosthesis. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 A top view of the acetabular cup, fine-tuning assembly, and liner assembly is shown.

[0017] Figure 2A cross-sectional view of the acetabular cup, fine-tuning assembly, and liner assembly is shown.

[0018] Figure 3 A side view of the acetabular cup is shown;

[0019] Figure 4 A side view of the fixing part is shown;

[0020] Figure 5 A schematic diagram of the connecting components is shown;

[0021] Figure 6 A schematic diagram of the adjustment section and the liner assembly is shown;

[0022] Figure 7 A schematic diagram of the tool is shown;

[0023] Figure 8 A cross-sectional view of the tool is shown;

[0024] The above-mentioned figures include the following reference numerals: 1. Acral cup; 10. First opening; 2. Fine-tuning component; 20. Fixing part; 200. Second opening; 201. Connecting part; 2010. First connecting part; 2011. Second connecting part; 2012. Third connecting part; 202. Slide rail; 203. Fourth connecting part; 21. Adjusting part; 210. Sliding ball; 211. First sawtooth; 212. Worm gear; 213. Gear; 214. Fifth connecting part; 215. Third opening; 3. Gasket; 30. Second sawtooth; 4. Tool; 40. Push rod; 400. Buckle; 401. Spring; 402. Ball head; 41. Sleeve; 410. First fixing block; 411. Rotating rod; 412. Sixth connecting part; 413. Second fixing block. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0028] like Figure 1-6As shown: An acetabular cup includes an acetabular cup 1, which includes a first opening 10, which is a crescent-shaped channel; and a fine-tuning component 2, which includes a fixing part 20 and an adjusting part 21. The fixing part 20 includes an upper outer shell and a bottom ring. Three second openings 200 are evenly arranged at the bottom of the fixing part 20. A connecting component 201 is arranged inside the second opening 200. The connecting component 201 includes a first connecting part 2010, a second connecting part 2011, and a third connecting part 2012. Part 2012, the first connecting part 2010 is crescent-shaped, the second connecting part 2011 is cylindrical and fixedly connected to the first connecting part, the third connecting part 2012 is cylindrical with a diameter larger than the second connecting part 2011, and is fixedly connected to the second connecting part; the upper part of the second opening 200 is a crescent-shaped channel consistent with the first connecting part 2010, and the lower part is a crescent-shaped channel with the same diameter as the second connecting part 2011; the fixing part 20 has a slide rail 202 provided on the inner side of its bottom for fixing. The interior of part 20 is symmetrically provided with a fourth connecting part 203, which is a cuboid with a circular opening on its surface; the adjusting part 21 is a solid ring, and the outer surface of the adjusting part 21 is uniformly provided with sliding balls 210, which are hemispherical and have the same diameter as the slide rail 202; the upper surface of the adjusting part 21 is uniformly provided with first serrations 211, and the adjusting part 21 is provided with a worm gear 212 that meshes with the first serrations 211; gears 2 are symmetrically provided at both ends of the worm gear 212. 13 and the fifth connecting part 214, the gear 213 is evenly provided with half tooth grooves, the fifth connecting part 214 is a cylinder and is hinged to the fourth connecting part 203 to support the worm gear, the bottom surface of the adjusting part 21 is evenly provided with three third openings 215 to cooperate with the tool 4 to realize the rotation of the adjusting part, the third opening 215 is triangular block opening; liner 3, the surface of the liner 3 is provided with second serrations 30, the second serrations 30 can mesh with the gear 213.

[0029] like Figure 1 As shown, an acetabular cup prosthesis includes an acetabular cup 1 and a fine-tuning component 2. The fine-tuning component includes a fixing part 20 and an adjusting part 21, as well as a pad 3. The fine-tuning component 2 is disposed between the acetabular cup 1 and the pad 3. The fixing part 20 is evenly provided with three second openings 200, and a connecting part 201 is provided in the second openings 200 to realize the connection with the acetabular cup 1. The adjusting part 21 is evenly provided with three third openings 215.

[0030] like Figure 2As shown, an acetabular cup prosthesis has the following characteristics: the bottom diameter of the fixing part 20 is the same as the inner diameter of the acetabular cup 1, and the size and shape of the upper outer shell are the same as the inner surface of the acetabular cup 1; the bottom diameter of the adjusting part 21 is the same as the inner diameter of the fixing part 20; the bottom diameter of the pad 3 is the same as the inner diameter of the adjusting part 21, and its outer surface is in contact with the inner surface of the fixing part 20; the adjusting part 21 contacts and slides with the slide rail 202 on the inner side of the fixing part 20 via a sliding ball 210; the upper surface of the adjusting part 21 is provided with a first serration 211, which meshes with a worm gear 212; the worm gear 212 is symmetrically provided with gears 213 and a fifth connecting part 214 at both ends; the fifth connecting part 214 is hinged to the fourth connecting part 203 inside the fixing part 20 to support the worm gear 212; a second serration 30 is provided on one side surface of the pad 3, which meshes with the gear 213 to achieve deflection of the pad 3.

[0031] like Figure 3 As shown, the acetabular cup 1 includes a shell and a bottom ring. Three first openings 10 are evenly distributed on the inner surface of the ring. The first openings 10 are crescent-shaped channels.

[0032] like Figure 4 As shown, the fixing part 20 includes an upper outer shell and a bottom ring. Three second openings 200 are evenly distributed on the outer side of the bottom ring. A connecting component 201 is provided in the second opening 200. The connecting component includes a first connecting part 2010, a second connecting part 2011, and a third connecting part 2012. The upper part of the second opening 200 is a crescent-shaped channel consistent with the first connecting part 2010, and the lower part is a crescent-shaped channel with the same diameter as the second connecting part 2011. This allows the third connecting part 2012 to push the entire connecting component 201 into the first opening 10 in the acetabular cup 1, thereby realizing the connection between the acetabular cup 1 and the fixing part 20. A slide rail 202 is provided on the inner side of the bottom of the fixing part 20, and a fourth connecting part 203 is provided inside it.

[0033] like Figure 5 As shown, the connecting component 201 includes a first connecting part 2010, a second connecting part 2011, and a third connecting part 2012. The first connecting part 2010 is crescent-shaped, the second connecting part 2011 is cylindrical and fixedly connected to the first connecting part, and the third connecting part 2012 is cylindrical with a diameter larger than that of the second connecting part 2011 and fixedly connected to the second connecting part.

[0034] like Figure 6As shown, the adjusting part 21 and the pad 3 are assembled. The adjusting part 21 is annular in shape, and its outer surface is uniformly provided with sliding balls 210. The sliding balls 210 are hemispherical, and their diameter is the same as that of the slide rail 202. The upper surface of the adjusting part 21 is uniformly provided with first serrations 211. A worm 212 is provided on the upper part of the adjusting part 21 and meshes with the first serrations 211. The two ends of the worm 212 are symmetrically provided with gears 213 and fifth connecting parts 214. The gears 213 are uniformly provided with half of the tooth grooves. The fifth connecting parts 214 are hinged to the fourth connecting parts 203 on the fixed part 20. The outer surface of the pad 3 is provided with second serrations 30, which mesh with the gears 213. At the same time, the thread on the worm 212 can be adjusted according to the pitch of the thread to control the deflection angle of the pad at different stages.

[0035] like Figure 7 As shown, a tool 4 used in conjunction with the aforementioned acetabular cup prosthesis includes a push rod 40 and a sleeve 41. The push rod 40 is provided with a buckle 400 to limit the sleeve. The push rod 40 is also provided with a ball head 402, the diameter of which is the same as the inner diameter of the aforementioned pad 3. The sleeve 41 is fitted onto the outer surface of the push rod 40. Three first fixing blocks 410 are evenly arranged on the outer surface of the sleeve 41. A sixth connecting part 412 is connected to the first fixing block 410. A second fixing block 413 is connected to the sixth connecting part 412. The second fixing block 413 is a triangular block, the shape and size of which are the same as the third opening 215 on the aforementioned adjustment part 21.

[0036] like Figure 8 As shown, tool 4 includes a push rod 40 and a sleeve 41. The push rod 40 is a hollow shell, and the ball head 402 is a solid sphere. A spring 401 is provided inside the push rod 40 and connected to a buckle 400 to limit the position of the sleeve 41. A first fixing block 410 is connected to the sleeve 41. A rotating rod 411 is provided inside the first fixing block 410. A sixth connecting part 412 is hinged to the rotating rod 411.

[0037] When using this invention, the specific technical effects brought about by the embodiments are as follows: First, after the acetabular cup of this embodiment is implanted into the human body, the fine-tuning component is placed inside the acetabular cup, and the second opening on the fixing part is aligned with the first opening on the acetabular cup. Then, the connecting component in the fixing part is pushed out of the second opening and then pushed into the first opening in the acetabular cup to achieve the connection and fixation between the fixing part and the acetabular cup. Next, the liner is placed inside the fine-tuning component, and when placing it, the end of the liner with the second serration is aligned with the worm gear on the adjusting part. When it is necessary to adjust the angle of the liner, The ball end of the tool is placed into the pad, and the sleeve is pushed down along the push rod to below the buckle, so that the buckle limits the sleeve. Then, the second fixing block is placed into the third opening on the bottom surface of the adjusting part. Then, the sleeve is rotated to drive the adjusting part to rotate. The first sawtooth on the adjusting part drives the worm to rotate, which in turn drives the gears at both ends of the worm to rotate. The rotation of the gears causes the second sawtooth on the meshing pad to deflect, thereby realizing the adjustment of the pad angle. At the same time, during this process, the push rod in the tool prevents the pad from rotating with the adjusting part to avoid unnecessary angle deflection.

[0038] In summary, this invention, by incorporating a fine-tuning component between the acetabular cup and the liner, enables fine-tuning of the liner angle even after the acetabular cup shell has been implanted. This allows physicians to precisely adjust the liner angle based on the patient's actual anatomy and activity level after confirming initial stability of the cup shell.

[0039] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0040] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0041] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hip cup, characterized in that, include: A acetabular cup (1), wherein a plurality of first openings (10) are evenly distributed on the inner bottom side of the acetabular cup (1); A fine-tuning component (2) is disposed inside and connected to the acetabular cup (1), the fine-tuning component (2) comprising: The fixing part (20) has a shell at the top and an annular shape at the bottom. Multiple second openings (200) are evenly distributed on the outer surface of the lower part of the fixing part (20). A connecting component (201) is provided inside the second opening (200). The connecting component (201) includes a first connecting part (2010), a second connecting part (2011), and a third connecting part (2012). A slide rail (202) is provided on the inner side of the lower part of the fixing part (20). A fourth connecting part (203) is symmetrically arranged inside the fixing part (20). The fourth connecting part (203) is rectangular in shape. Adjustment part (21), said adjustment part (21) is annular and includes: Sliding balls (210) are evenly distributed on the outer surface of the adjustment part (21). The first sawtooth (211) is evenly distributed on the upper surface of the adjustment part (21). A worm gear (212) is disposed on the upper part of the adjustment part (21) and meshes with the first saw tooth (211). Gears (213), which are symmetrically arranged at both ends of the worm (212), The fifth connecting part (214) is a cylinder, symmetrically arranged at both ends of the worm (212), and hinged to the fourth connecting part (203). The third opening (215) is in the shape of a triangular block and is evenly distributed on the lower surface of the adjustment part (21). The pad (3) has a second serration (30) on one side of its outer surface, which meshes with the gear (213).

2. The acetabular cup according to claim 1, characterized in that, The bottom diameter of the fixing part (20) is the same as the inner diameter of the acetabular cup (1), and the size and shape of the upper outer shell are the same as the inner surface of the acetabular cup (1); the bottom diameter of the adjusting part (21) is the same as the inner diameter of the fixing part (20); the bottom diameter of the pad (3) is the same as the inner diameter of the adjusting part (21), and the outer surface of the pad (3) is in contact with the inner surface of the fixing part (20).

3. The acetabular cup according to claim 1, characterized in that, The first connecting part (2010) is crescent-shaped, the second connecting part (2011) is a cylinder and is fixedly connected to the first connecting part, and the third connecting part (2012) is a cylinder with a diameter larger than that of the second connecting part (2011) and is fixedly connected to the second connecting part.

4. The acetabular cup according to claim 1, characterized in that, The number of the first opening (10) and the second opening (200) are the same. The shape of the first opening (10) is a crescent-shaped channel that is consistent with the shape of the first connecting part (2010). The upper part of the second opening (200) is a crescent-shaped channel that is consistent with the size and shape of the first connecting part (2010), and the lower part is a crescent-shaped channel that is consistent with the diameter of the second connecting part (2011).

5. The acetabular cup according to claim 1, characterized in that, The sliding ball (210) is a hemisphere, and its diameter is the same as that of the slide rail (202).

6. The acetabular cup according to claim 1, characterized in that, The gear (213) is a half gear, and tooth grooves are evenly distributed on the half gear.

7. The acetabular cup according to claim 1, characterized in that, The threads on the worm (212) have different pitches.

8. A tool (4) for use with the acetabular cup according to any one of claims 1-7, characterized in that: Includes a push rod (40) and a sleeve (41). The push rod (40) is a hollow shell and is also provided with a buckle (400). A spring (401) is provided inside the push rod (40) and connected to the buckle (400). The push rod (40) is also provided with a ball head (402), which is a solid sphere with a diameter consistent with that of the gasket (3). The sleeve (41) is fitted onto the outer surface of the push rod (40). 1) Multiple first fixing blocks (410) are evenly distributed on the top. A rotating rod (411) is provided inside the first fixing block (410). The rotating rod (411) is a cylinder and is provided with a sixth connecting part (412) that is hinged to the rotating rod (411). The sixth connecting part (412) is cuboid in shape. A second fixing block (413) is provided on the sixth connecting part (412). The second fixing block (413) is a triangular block with the same shape and size as the third opening (215) mentioned above.

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