WO2021257040A1 - Elbow prosthesis system to be used for bone deformations at humerus and ulna - Google Patents

Elbow prosthesis system to be used for bone deformations at humerus and ulna Download PDF

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Publication number
WO2021257040A1
WO2021257040A1 PCT/TR2021/050629 TR2021050629W WO2021257040A1 WO 2021257040 A1 WO2021257040 A1 WO 2021257040A1 TR 2021050629 W TR2021050629 W TR 2021050629W WO 2021257040 A1 WO2021257040 A1 WO 2021257040A1
Authority
WO
WIPO (PCT)
Prior art keywords
elbow prosthesis
ulna
elbow
bone
mentioned
Prior art date
Application number
PCT/TR2021/050629
Other languages
French (fr)
Inventor
Fatih OZAYDIN
Serdar OZMEN
Mustafa CETIN
Ozlem ARI
Original Assignee
Estas Eksantrik Sanayi Ve Ticaret Anonim Sirketi
So Saglik Ortopedi Medikal Elektrik Insaat Taahhut Proje Ithalat Ihracat Pazarlama Ve Ticaret Limited Sirketi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Estas Eksantrik Sanayi Ve Ticaret Anonim Sirketi, So Saglik Ortopedi Medikal Elektrik Insaat Taahhut Proje Ithalat Ihracat Pazarlama Ve Ticaret Limited Sirketi filed Critical Estas Eksantrik Sanayi Ve Ticaret Anonim Sirketi
Publication of WO2021257040A1 publication Critical patent/WO2021257040A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3804—Joints for elbows or knees for elbows
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/30375—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess with an intermediate bushing or sleeve between the moving parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
    • A61F2002/30688—Means for allowing passage or sliding of tendons or ligaments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2002/30906—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth shot- sand- or grit-blasted
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2002/3093—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth for promoting ingrowth of bone tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3804—Joints for elbows or knees for elbows
    • A61F2002/3813—Joints for elbows or knees for elbows for ulno-humeral joints

Definitions

  • the invention relates to elbow prosthesis systems used to treat the deformation of the humerus and ulna bones in the elbow region.
  • the primary function of the structure known as the olecranon in the elbow joint is to prevent displacement of the ulna relative to the humerus.
  • the olecranon region in the ulna is not protected.
  • Elbow prostheses in systems in the prior art have a flat structure. So, it is not anatomical. The fact that the elbow prostheses in prior art are not in an anatomical structure reduces bone adhesion and causes stress.
  • Joint movements are not ideal in prosthesis systems in the prior art. In other words, joint movement angles may be excessive or insufficient.
  • the ulna system and the humeral trunk part are not assembled to each other and prepared. This causes too many parts to be assembled during surgery.
  • Adjustable lateral jointed condyle is mentioned in the European patent document with the code EP2967881 in the prior art.
  • Said condyle is used in an elbow prosthesis.
  • the elbow prosthesis includes a first stem component for attachment to one of a humerus and an ulna, a second stem component for attachment from said humerus and said ulna to the other, a joint disposed between and connecting said first stem component and said second stem component to allow respective rotation about a first axis between said first stem component and said second stem component; and a first condyle component rotatable about said first axis with one of said first stem component and said second stem component; a second condyle component movable relative to said first condyle component about a second axis to be configured to engage said first condyle component in first and second orientations.
  • too many parts are used during surgery.
  • the bone tissue compatibility of the mentioned prosthesis is insufficient. Since there will be frictions between the moving parts, the
  • the purpose of the invention is to obtain an elbow prosthesis system that can be used in bone deformations at humerus and ulna with increased yield, elongation, and strength values.
  • Another purpose of the invention is to obtain an elbow prosthesis system in which excessive and/or insufficient joint movements are eliminated.
  • Another purpose of the invention is to obtain an elbow prosthesis system in which bone adhesion is increased.
  • Another purpose of the invention is to obtain an elbow prosthesis system in which stress formation is reduced.
  • Another purpose of the invention is to prevent the assembly of too many parts during the surgery.
  • Another purpose of the invention is to obtain an elbow prosthesis system with increased patient comfort. Another purpose of the invention is to obtain an elbow prosthesis system with increased biocompatibility.
  • Another purpose of the invention is to obtain an elbow prosthesis system with increased bone tissue compatibility. Another purpose of the invention is to obtain an elbow prosthesis system that prevents soft tissue irritation.
  • Another purpose of the invention is to obtain an elbow prosthesis system that can work in accordance with existing tumour prostheses.
  • Another purpose of the invention is to obtain an elbow prosthesis that allows incisions from the anterior-internal region to give confidence to the physicians during the surgery.
  • Elbow prosthesis developed to achieve the mentioned purposes includes an ulna system (1), a wear plate (2), a stud (3), bushings (4), an elbow prosthesis trunk (5), tissue holes (6), bolts (7), an elbow prosthesis cap (8), a support nail (9) and connector regi on ( 10) .
  • FIG - 1 is the perspective view of the disassembled elbow prosthesis system.
  • Figure-2 is the perspective view of the assembled elbow prosthesis system.
  • the invention relates to elbow prosthesis systems used to treat the bone deformations at humerus and ulna in the elbow region.
  • the elbow prosthesis subject to the invention includes an ulna system (1), a wear plate (2), a stud (3), bushings (4), an elbow prosthesis trunk (5), tissue holes (6), bolts (7), an elbow prosthesis cap (8), a support nail (9) and connector region (10).
  • the elbow prosthesis subject to the invention consists of Ti6A14V ELI (Grade 23) material.
  • the yield and percent elongation values of it are 1.5 times higher than the Ti4 material used in the prostheses of the prior art. Considering the yield and percent elongation values, more strength is provided with smaller-diameter implants.
  • the elbow prosthesis subject to the invention is placed at an angle and so the olecranon structure, which prevents the displacement of the ulna relative to the humerus, is preserved without cutting.
  • the elbow prosthesis is designed in an anatomically appropriate manner. With the anatomical design, patient comfort and bone adhesion are increased, while stress formation is reduced. In addition, the design provides an ideal (optimum) joint motion angle of 182°. Thus, conditions such as excessive and/or insufficient joint movements are prevented.
  • the angle of movement can vary between lower and upper values of 175° and 185°.
  • the bushings (4) and wear plate (2) used in the elbow prosthesis subject to the invention are composed of Ultra High Molecular Weight Polyethylene (UHMWPE) material.
  • the remaining parts are made of Ti6A14V ELI (Grade 23).
  • elbow prosthesis subject to the invention works in accordance with existing tumour prostheses. Thus, when more resections occur, that is, as the bone tissue deformation grows, elbow prostheses can be applied.
  • the elbow prosthesis which is used to treat the bone deformations at humerus and ulna in the elbow region, is applied according to the following workflow:
  • the drill is conveniently placed in the medullary space of the proximal ulna.
  • the medullary space of the proximal ulna is prepared with an ulnar brooch.
  • the length of the distal humerus segment to be reconstructed is measured radiologically. Tumour resection is performed at the predetermined level.
  • the humerus medullary cavity is brought to the desired diameter.
  • the brooch is left inside the medullary cavity.
  • the extension piece and the humeral trunk are attached to the brooch.
  • the ulna trunk and trial distal humerus components are temporarily ligated to assess limb length and rotation.
  • the appropriately sized humeral stem is implanted.
  • the extension piece and the distal humeral trunk are attached.
  • the components are then locked with axial transfer bolt.
  • the distal humeral pad is firmly placed in its socket in the distal humeral body.
  • the humeral centring brooch is placed on the ulna trunk bed from both sides.
  • the distal humerus and ulna components are brought together. Humerus and ulna are aligned.
  • Humerus axel on the right side is inserted and tightened counter-clockwise with a T-handle screwdriver.
  • the left humerus axel locking screw is inserted from the side and the humerus axel is tightened clockwise.
  • the elbow prosthesis cap (8) in the elbow prosthesis is connected to the connector region (10) with bolts (7).
  • the studs (3) and bushings (4) are connecting parts, connecting the ulna system (1) and the elbow prosthesis trunk (5) to each other.
  • the ulna system (1) and the elbow prosthesis trunk (5) work in a frictional manner. Because of the mentioned friction, a wear plate (2) is placed between the ulna system (1) and the elbow prosthesis trunk (5) to minimize the friction. Wear plate (2) prevents the ulna system (1) and the elbow prosthesis trunk (5) from rubbing against each other. In this way, the main components of the system work smoothly, and their wear is prevented.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Prostheses (AREA)

Abstract

The invention is about an elbow prosthesis used to treat the bone deformations at the humerus and ulna in the elbow region and is characterised in that; comprising the ulna system (1) with increased bone-tissue compatibility by applying thick sandblasting and anodic oxidation processes to the surface of the support nail (9) that remains in the bone, and the elbow prosthesis trunk (5), which has tissue holes (6) that allow the tendons to be attached.

Description

Elbow Prosthesis System to Be Used for Bone Deformations at Humerus and
Ulna
Technical Field
The invention relates to elbow prosthesis systems used to treat the deformation of the humerus and ulna bones in the elbow region.
Prior Art The primary function of the structure known as the olecranon in the elbow joint is to prevent displacement of the ulna relative to the humerus. When applying elbow prosthesis in current systems, the olecranon region in the ulna is not protected.
Elbow prostheses in systems in the prior art have a flat structure. So, it is not anatomical. The fact that the elbow prostheses in prior art are not in an anatomical structure reduces bone adhesion and causes stress.
Joint movements are not ideal in prosthesis systems in the prior art. In other words, joint movement angles may be excessive or insufficient. In addition, in existing systems, the ulna system and the humeral trunk part are not assembled to each other and prepared. This causes too many parts to be assembled during surgery. In the systems of the prior art, there are no tissue holes on the trunk that allow the tendons to be attached. The fact that the humeral trunk is not fully anatomical reduces patient comfort.
Adjustable lateral jointed condyle is mentioned in the European patent document with the code EP2967881 in the prior art. Said condyle is used in an elbow prosthesis. The elbow prosthesis includes a first stem component for attachment to one of a humerus and an ulna, a second stem component for attachment from said humerus and said ulna to the other, a joint disposed between and connecting said first stem component and said second stem component to allow respective rotation about a first axis between said first stem component and said second stem component; and a first condyle component rotatable about said first axis with one of said first stem component and said second stem component; a second condyle component movable relative to said first condyle component about a second axis to be configured to engage said first condyle component in first and second orientations. In the document in question, too many parts are used during surgery. In addition, the bone tissue compatibility of the mentioned prosthesis is insufficient. Since there will be frictions between the moving parts, the main elements of the system are damaged.
Purpose of the Invention
The purpose of the invention is to obtain an elbow prosthesis system that can be used in bone deformations at humerus and ulna with increased yield, elongation, and strength values.
Another purpose of the invention is to obtain an elbow prosthesis system in which excessive and/or insufficient joint movements are eliminated.
Another purpose of the invention is to obtain an elbow prosthesis system in which bone adhesion is increased.
Another purpose of the invention is to obtain an elbow prosthesis system in which stress formation is reduced.
Another purpose of the invention is to prevent the assembly of too many parts during the surgery.
Another purpose of the invention is to obtain an elbow prosthesis system with increased patient comfort. Another purpose of the invention is to obtain an elbow prosthesis system with increased biocompatibility.
Another purpose of the invention is to obtain an elbow prosthesis system with increased bone tissue compatibility. Another purpose of the invention is to obtain an elbow prosthesis system that prevents soft tissue irritation.
Another purpose of the invention is to obtain an elbow prosthesis system that can work in accordance with existing tumour prostheses.
Another purpose of the invention is to obtain an elbow prosthesis that allows incisions from the anterior-internal region to give confidence to the physicians during the surgery.
Elbow prosthesis developed to achieve the mentioned purposes includes an ulna system (1), a wear plate (2), a stud (3), bushings (4), an elbow prosthesis trunk (5), tissue holes (6), bolts (7), an elbow prosthesis cap (8), a support nail (9) and connector regi on ( 10) .
Description of Figures
Attached Figure - 1 is the perspective view of the disassembled elbow prosthesis system. Figure-2 is the perspective view of the assembled elbow prosthesis system.
The main parts expressed in the figures are given below with their numbers and names:
(1) Ulna system
(2) Wear plate (3) Stud
(4) Bushings
(5) Elbow prosthesis trunk
(6) Tissue holes (7) Bolts
(8) Elbow prosthesis cap
(9) Support nail
(10) Connector region Explanation of the Invention
The invention relates to elbow prosthesis systems used to treat the bone deformations at humerus and ulna in the elbow region. The elbow prosthesis subject to the the invention includes an ulna system (1), a wear plate (2), a stud (3), bushings (4), an elbow prosthesis trunk (5), tissue holes (6), bolts (7), an elbow prosthesis cap (8), a support nail (9) and connector region (10).
The elbow prosthesis subject to the invention consists of Ti6A14V ELI (Grade 23) material. The yield and percent elongation values of it are 1.5 times higher than the Ti4 material used in the prostheses of the prior art. Considering the yield and percent elongation values, more strength is provided with smaller-diameter implants.
The elbow prosthesis subject to the invention is placed at an angle and so the olecranon structure, which prevents the displacement of the ulna relative to the humerus, is preserved without cutting. The elbow prosthesis is designed in an anatomically appropriate manner. With the anatomical design, patient comfort and bone adhesion are increased, while stress formation is reduced. In addition, the design provides an ideal (optimum) joint motion angle of 182°. Thus, conditions such as excessive and/or insufficient joint movements are prevented. In alternative embodiments of the invention, the angle of movement can vary between lower and upper values of 175° and 185°.
The ulna system (1) and the humerus trunk part, that is, the elbow prosthesis trunk
(5), are assembled to each other before the surgery and sent as assembled. Thus, assembly of too many parts during the operation is prevented. There are tissue holes
(6) on the elbow prosthesis trunk (5) that allow the tendons to be attached.
The bushings (4) and wear plate (2) used in the elbow prosthesis subject to the invention are composed of Ultra High Molecular Weight Polyethylene (UHMWPE) material. The remaining parts are made of Ti6A14V ELI (Grade 23).
The elbow prosthesis subject to the invention works in accordance with existing tumour prostheses. Thus, when more resections occur, that is, as the bone tissue deformation grows, elbow prostheses can be applied.
In the ulna system (1), bone tissue compatibility is increased by applying thick sandblasting and anodic oxidation processes to the surface of the support nail (9) that remains in the bone. However, soft tissue irritation was prevented by applying fine sandblasting and anodic oxidation processes to the remaining surfaces of the elbow prosthesis.
The elbow prosthesis, which is used to treat the bone deformations at humerus and ulna in the elbow region, is applied according to the following workflow:
- The drill is conveniently placed in the medullary space of the proximal ulna.
- The medullary space of the proximal ulna is prepared with an ulnar brooch.
- The right and left sides of the implant are checked. It is then implanted.
- The length of the distal humerus segment to be reconstructed is measured radiologically. Tumour resection is performed at the predetermined level.
- With a reamer, the humerus medullary cavity is brought to the desired diameter. The brooch is left inside the medullary cavity. The extension piece and the humeral trunk are attached to the brooch. The ulna trunk and trial distal humerus components are temporarily ligated to assess limb length and rotation.
- After the brooch and trial components are removed, the appropriately sized humeral stem is implanted. The extension piece and the distal humeral trunk are attached. The components are then locked with axial transfer bolt.
After the distal humeral components are fixed, the distal humeral pad is firmly placed in its socket in the distal humeral body. The humeral centring brooch is placed on the ulna trunk bed from both sides.
The distal humerus and ulna components are brought together. Humerus and ulna are aligned.
Humerus axel on the right side is inserted and tightened counter-clockwise with a T-handle screwdriver.
The left humerus axel locking screw is inserted from the side and the humerus axel is tightened clockwise.
Thus, the assembly of the elbow prosthesis is completed.
The elbow prosthesis cap (8) in the elbow prosthesis is connected to the connector region (10) with bolts (7). In addition, the studs (3) and bushings (4) are connecting parts, connecting the ulna system (1) and the elbow prosthesis trunk (5) to each other. The ulna system (1) and the elbow prosthesis trunk (5) work in a frictional manner. Because of the mentioned friction, a wear plate (2) is placed between the ulna system (1) and the elbow prosthesis trunk (5) to minimize the friction. Wear plate (2) prevents the ulna system (1) and the elbow prosthesis trunk (5) from rubbing against each other. In this way, the main components of the system work smoothly, and their wear is prevented.

Claims

C L A I M S
1. An elbow prosthesis used to treat the bone deformations at the humerus and ulna in the elbow region and is characterised in that; comprising the ulna system (1) with increased bone-tissue compatibility by applying thick sandblasting and anodic oxidation processes to the surface of the support nail (9) that remains in the bone, and the elbow prosthesis trunk (5), which has tissue holes (6) that allow the tendons to be attached.
2. An elbow prosthesis mentioned in Claim 1 and is characterised in that; comprising studs (3) and bushings (4) connecting the ulna system (1) and the elbow prosthesis trunk (5).
3. An elbow prosthesis mentioned in Claim 1 and is characterised in that; comprising a bolt (7) that connects the elbow prosthesis cover (8) to the connector region (10).
4. An elbow prosthesis mentioned in Claim and is characterised in that; comprising a wear plate (2) that minimizes the friction between the ulna system (1) and the elbow prosthesis trunk (5).
5. An elbow prosthesis mentioned in Claim 1 and is characterised in that; comprising a support nail (9) for which bone tissue compatibility is increased by applying thick sandblasting and anodic oxidation processes.
6. An elbow prosthesis mentioned in Claim 1 and and is characterised in that; comprising the ulna system (1), wear plate (2), stud (3), bushings (4), elbow prosthesis trunk (5), bolts (7), elbow prosthesis cap (8) and connector region (10).
7. The wear plate (2) and bushing (4) mentioned in Claim 6 and is characterised in that; being composed of Ultra High Molecular Weight Polyethylene (UHMWPE) material.
8. The ulna system (1), stud (3), the elbow prosthesis body (5), the bolts (7), the elbow prosthesis cap (8) and the connector region (10) mentioned in Claim 6 and is characterised in that; being composed of Ti6A14V ELI (Grade 23) material to provide greater strength with smaller diameter implants considering the yield and percent elongation values.
PCT/TR2021/050629 2020-06-19 2021-06-18 Elbow prosthesis system to be used for bone deformations at humerus and ulna WO2021257040A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR202009565 2020-06-19
TR2020/09565 2020-06-19

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WO2023199080A1 (en) * 2022-04-13 2023-10-19 Semmelweis Egyetem Elbow prosthesis implant

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US6699290B1 (en) * 1997-11-03 2004-03-02 Depuy Orthopaedics, Inc. Modular elbow
US20160338839A1 (en) * 2009-11-16 2016-11-24 Limacorporate Spa Elbow replacement apparatus and methods
CN207152677U (en) * 2016-10-28 2018-03-30 北京力达康科技有限公司 A kind of antibacterial elbow joint prosthese

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US6699290B1 (en) * 1997-11-03 2004-03-02 Depuy Orthopaedics, Inc. Modular elbow
US20160338839A1 (en) * 2009-11-16 2016-11-24 Limacorporate Spa Elbow replacement apparatus and methods
CN207152677U (en) * 2016-10-28 2018-03-30 北京力达康科技有限公司 A kind of antibacterial elbow joint prosthese

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023199080A1 (en) * 2022-04-13 2023-10-19 Semmelweis Egyetem Elbow prosthesis implant

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