TR201906755A2 - INNOVATION IN WRIST PROSTHESES - Google Patents

Abstract

The subject of the invention is related to the prosthesis which is generally used in orthopedic wrist surgeries, worn on the wrist of patients who cannot perform the wrist joint function and performs the natural wrist joint function more efficiently. The invention is an orthopedic product that can be used for the reconstruction of defects in distal radius and / or carpal bones for any reason. In particular, the present invention relieves painful joint deformations caused by osteoarthritis, rheumatoid arthritis, traumatic arthritis, tumors, fractures, etc., in the wrist area in the medical medical field. The subject of the invention is about the prosthesis that is generally used in orthopedic wrist surgeries, which is worn on the wrist of patients who cannot perform the wrist joint function and performs the natural wrist joint function more efficiently. The invention is an orthopedic product that can be used for the reconstruction of defects in distal radius and / or carpal bones for any reason. The present invention is particularly suitable for osteoarthritis, rheumatoid arthritis, traumatic arthritis, tumor, fracture etc. It is about an orthopedic prosthesis designed to eliminate painful joint deformations caused by.

Description

DESCRIPTION INNOVATION IN WRIST PROSTHESIS Technical Area The subject of the invention is the wrist joint, which is generally used in orthopedic wrist surgeries. Natural wrist joint attached to the wrist of patients who cannot fulfill their duties It is about the prosthesis that fulfills its task more efficiently. Invention, distal radius and/or reconstruction of any defects in the carpal bones It is an orthopedic product that can be used.

The invention is particularly useful in the medical field for osteoarthritis, rheumatoid arthritis, traumatic arthritis, tumor, fracture etc. painful joint deformations caused by It relates to an orthopedic prosthesis designed to remove Prior Art Due to the damage to the joint surface, there is often a severe pain in the related area. pain occurs and the person may not be able to meet his daily needs.

Prosthesis applications made specifically for the patient's symptoms eliminate these difficulties. can lift. Prostheses replace any missing organ or tissue in the body. are artificial products. The prosthesis in orthopedic applications is usually diseased. or surgically into the bone to replace a joint that has lost its integrity or It is referred to as an implant placed on its surface.

In the present technique, in large bone defects occurring in the wrist, tumoral or various prostheses to repair damage in traumatic and degenerative applications is used. In applications known in the art, tumoral or traumatic, There is no degenerative prosthesis that can be used.

In the current technique, monoblock application of the radial stem, revision of the prosthesis and tumoral adversely affect its use in applications.

Suture holes on the dorsal surface of the anatomical radial component in the state of the art does not exist. Suture holes, especially in traumatic situations, remaining on the prosthesis eliminate the risk of bone tissue or adhesions between the prosthesis and tendon. it helps to lift.

Inability to restore the distal radioulnar joint in the current technique, after prosthesis surgery negatively affects the appearance of the wrist.

In the current technique, no locking screws are used to fix the carpal component, reveals the risk of premature loosening of the component in rotational movements. It is extracting.

Screw in stems with modular radial shaft and radial metaphyseal connection in the current technique provided by the system. The screw system causes a low stem diameter and adversely affects the endurance strength and causes rotational changes over time. It poses the risk of premature loosening with (rotating) movements.

In the current technique, modular stems that connect with screws reduce in diameter and strength deficiency occurs and rotational (rotational) movements occur prematurely. there is a risk of relaxation.

In the current technique, prostheses applied to the wrist have a flatter and single-plan surface.

This situation limits the range of motion of the wrist after prosthesis surgery.

As a result of the studies in the literature, the movements of the anatomical wrist joint tumoral, which increases the quality of life of the patient by simulating in the best way (similar to the real thing) or suture on the dorsal surface of the anatomical radial component in traumatic situations adhesion of the bone tissue remaining on the prosthesis, or anatomical radial component, which reduces the risk of adhesions between tendon and prosthesis. The metaphyseal region is in a design that fits the sigmoid notch, the polyethylene carpal bed is in the hand. prosthesis designed to mimic the anatomy of the carpal bones of the wrist. No related system or patent application has been found.

Purpose of the Invention The new hand developed with the aim of solving the problems existing in the existing art mentioned above. The purposes of the wrist prosthesis are as stated below.

The aim of the invention is to describe osteoarthritis in the wrist region, rheumatoid arthritis, traumatic arthritis, tumor, fracture etc. painful joint deformations caused by Removal of the wrist and the appearance of the wrist thanks to the prosthesis that acts as a joint. to keep it close.

Thanks to the invention obtained, in large bone defects, tumoral or traumatic, one in cases where the normal anatomical structure of the entire wrist is lost, such as degenerative The wrist prosthesis set can solve the problem in one go.

Different diameter and length of the anatomical radial component and modular stems in the invention Having options makes it possible to use it in revision and tumoral cases. it builds.

In the invention, one or more suture holes on the dorsal surface of the anatomical radial component are available. The anatomical radial component provides suture passages on its dorsal surface. Thanks to the holes, especially in traumatic situations, the remaining bone tissue on the prosthesis or the risk of adhesions between the prosthesis and the tendon is reduced.

The anatomical radial component of the invention has a design that fits the metaphyseal region sigmoid notch. It must have the ability to imitate the distal radioulnar joint when needed. ensures its use.

The carpal component metal back of the invention is attached to the metacarpals outside the stem with locking screws. is fixed. This situation increases the stability (endurance) of the carpal component, It eliminates the risk of relaxation.

In the invention, in stems with modular radial shaft and radial metaphyseal connection, conical intertwined It is provided with a pass-through system. Thus, the stability (durability) of the stem increases and the risk of premature relaxation that will occur with micro-movements over time. decreases.

The radial stems in the invention are designed to be suitable for cemented and cementless application. It is designed using different coating method. In this situation, the patient's existing bone depending on its stock, it provides an option for the stem to be used in the surgical procedure and reduces the risk of premature relaxation in rotational movements.

The polyethylene carpal bed of the invention mimics the actual anatomy of the wrist carpal bones. It is designed to. Polyethylene that can be produced in different sizes and thicknesses carpal bed design, thanks to the scafoid, Iunatum, triquetrum located in the carpal region It can mimic the condition of the carpal bones. In this case, the placement of the prosthesis Afterwards, it also contributes to the stability of the prosthesis (durability).

Detailed Description of the Invention To achieve the aim of this invention, any distal radius vei or carpal bones should be Orthopedic device designed to be used in the reconstruction of defects resulting from This product, which is a prosthesis, and its components are shown in the attached figures.

From these figures; Figure 1 - Components and elements of a representative embodiment of the invention (Primary EI-Wrist) unassembled perspective view Figure 2 - Invention suitable for use in tumoral or traumatic situations Assembly of components and elements of a representative application (Tumor EI-Wrist) unmade perspective view Figure 3a - Co-movable carpal component of the invention bottom perspective view Figure 3b - Co-movable carpal component of the invention side section view Figure 3c - Co-movable carpal component of the invention top view Figure 4a - Co-movable polyethylene carpal bed of the invention bottom perspective view Figure 4b - Co-movable polyethylene carpal bed of the invention side view Figure 40 - Co-movable polyethylene carpal bed of the invention top view Figure 4d - The co-mobility polyethylene carpal bed of the invention side section view of the thickness Figure 4e - Co-mobility polyethylene carpal of the invention Side section view of the nail on the floor of the bed Figure 5a - Anatomical radial of the invention with mobility bottom perspective view of the component Figure 5b - Anatomical radial of the invention with mobility side section view of the component Figure 5:: - Anatomical radial of the invention with the ability to move together Suture holes on the dorsal surface of the component Figure 5d - Anatomical radial of the invention with mobility located on the lateral surface of the component and the metaphyseal region is a sigmoid groove. side view of the recess Figure 5e - Anatomical radial of the invention with mobility Side section view of the female cone at the base of the component Figure 6a - Cementless modular with co-mobility of the invention side section view of the stem Figure 6!) - The co-movable cementitious modular of the invention side section view of the stem Figure ?a - Co-movable extension piece of the invention top perspective view Figure ?b - Co-movable extension piece of the invention side section view Figure 70 - Co-movable extension of the invention top view Figure 8a - Round-profile extension of the invention with interoperability top perspective view of the piece Figure 8b - Round-profile extension of the invention with interoperability side section view of the part Reference Numbers 1. Carpal Component 1.1 Groove Shaft 1.2 Edge Tabs 1.3 Screw Holes 2. Polyethylene Carpal Mattress 2.1 Polyethylene Carpal Bed Thickness 2.2 Spherical Protrusions on the Surface 2.3 Nail on Base 3. Anatomical Radial Component 3.1 Indented Part on the Side Surface 3.2 Suture Holes 3.3 Pin Hole 3.4 Female Tapered at the base of the Anatomical Radial Component 4. Cementless Modular Stem 4.1 Shaft Partial Channel Profile 4.2 Male Conical at the base of the Cementless Modular Stem . Cemented Modular Stem .1 Coated Round Profile .2 Male Tapered at Base of Cemented Modular Stem 6. Extension Piece 6.1 Female Tapered at the base of the Extension Piece 6.2 Male Taper at the top of the Extension Piece 6.3 Rotation Pin 7. Round Profile Extension Piece 7.1 Female Conical at the base of the Round Profile Extension 7.2 Male Conical at the top of the Round Profile Extension In figure 1, carpal component (1), polyethylene carpal bearing (2), anatomical radial component (3), disassembly of the cementless modular stem (4) and the cemented modular stem (5) perspective views are given.

In Figure 2, unlike Figure 1, tumoral or traumatic lesions in large bone defects extension piece (6) and round profile extension piece suitable for use in There are disassembled perspective views of the elements (7).

Carpal component (1) in Figures 3a, 3b, 30; at least two screw holes of different diameters (1.3) includes spline shaft (1.1) and claw. Lock used in carpal component (1) Thanks to the screws, the risk of loosening in the prosthesis depending on the movement of the hand is eliminated. is being removed.

The polyethylene carpal bearing (2) in figures 4a, 4b, 40, 4d, 4e has different sizes and different It can be produced and used in thicknesses. Thus, adaptation to different joint sizes can provide. On the surface of the polyethylene carpal bed (2), the carpal bone There are spherical protrusions (2.2) similar to its anatomy. Polyethylene carpal bearing (2) spherical protrusions (2.2) on the surface of the carpal bone anatomy and the range of motion and Stability (durability) is provided after placement.

On the half surface of the anatomical radial component (3) in figures 5a, 5b, 50, 5d, 5e The metaphyseal region has a recess (3.1) that can fit into the sigmoid groove. anatomical radial the suture passages on the dorsal surface of the component (3) and the suture materials There are suture holes (3.2) that allow its use. Anatomical radial component Rotation (rotation) after mounting the extension pieces (6.7) on the base (3) There is a preventer pin hole (3.3).

The cementless modular stem (4) in figure 6ai and the cemented stem in figure 6b modular stem (5), with part-shaft channel profile (4.1) and plated round profile (5.1) It provides cementless compaction. Modular stems are applied to the radius bone. The male taper (4.2) at the base of the uncemented modular stem and the cemented stem The male conical (5.2) at the base of the stems with the anatomical radial component (3) It provides the conical connection between

The extension piece (6) in Figure Ta, Tb, ?C is used in articulation or tumor applications. is used. The female conical (6.1) at the base of the extension piece is cementless and the conical connection between the cemented modular stems (4,5) and the extension (6) it provides. Male cone (6.2) anatomically located on the upper part of the extension piece It provides the conical connection between the radial component (3) and the extension piece (6).

Rotation during attachment of the anatomical radial component (3) and the extension piece (6) can occur. on the upper part of the extension (6) to prevent rotation. There is a rotation pin (6.3).

Round profile extension piece (7) in Figure Ba, Bb in tumor cases is used. Female conical (7.1) located at the base of the round profile extension piece Cementless and cemented modular stems (4,5) with round profile extension (7) It provides the conical connection between At the base of the round profile extension piece The male conical (7.2) extension piece (6) and the round profile extension piece (7) It provides the conical connection between

Thanks to the slotted shaft (1.1) and locking screws on the base of the carpal component (1) placement of the prosthesis on the third metacarpal bone by centered on the capitatum bone and cementless fixation is provided. Next, the polyethylene carpal bed (2) nail (2.3) at the base and the margins of the carpal component (1) With the help of claws (1.2), the polyethylene carpal bearing (2) and the carpal component (1) are connected to each other. is locked. Next, the female at the base of the anatomical radial component (3) anatomical with tapered (3.4), cementless modular stem (4) or cemented modular stem (5) It provides the conical connection between the radial component (3) (Figure 1). final stage As an alternative, modular stems are applied to the radius bone. In addition, tumoral or Cementless modular stem (4) with anatomical radial component (3) in traumatic situations or between the cemented modular stem (5) the extension piece (6) and the extension with a round profile part (7) can be used.

Claims (4)

REQUESTS 1. The invention is a prosthesis used in wrist surgery, its characterizing feature is; a. Carpal component (1) with at least one locking screw hole (1.3), b. Polyethylene carpal bed (2), c. Anatomical radial component (3), cl. It contains an extension piece (6) and an extension piece (7) with a rounded profile for tumoral or traumatic situations. 2. Carpal bed (2) according to claim 1, characterized in that; the presence of at least one spherical protrusion (2.2) on the surface, similar to the anatomy of the carpal bone. 3. It is an extension piece (6) according to claim 1, characterized in that; conical connection with anatomical radial component (3) and/or modular stems. 4. It is an extension piece (7) with a round profile according to claim 1, and its characterizing feature is; conical connection with anatomical radial component (3) and/or modular stems.