KR20220043284A - Porous pedicle screw and Surgical tool for spinal fixation with the screw - Google Patents

Porous pedicle screw and Surgical tool for spinal fixation with the screw Download PDF

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KR20220043284A
KR20220043284A KR1020200126510A KR20200126510A KR20220043284A KR 20220043284 A KR20220043284 A KR 20220043284A KR 1020200126510 A KR1020200126510 A KR 1020200126510A KR 20200126510 A KR20200126510 A KR 20200126510A KR 20220043284 A KR20220043284 A KR 20220043284A
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vertebral body
porous
pedicle screw
screw
spinal fixation
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KR1020200126510A
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Korean (ko)
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KR102545243B1 (en
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임권묵
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주식회사 에이스메디코프
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7071—Implants for expanding or repairing the vertebral arch or wedged between laminae or pedicles; Tools therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • A61B17/7076—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
    • A61B17/7082—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/866—Material or manufacture
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/02—Inorganic materials
    • A61L31/022—Metals or alloys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L31/146—Porous materials, e.g. foams or sponges

Abstract

The present invention relates to a porous pedicle screw, and a surgical tool for spinal fixation including the same. According to the present invention, the pedicle screw is screwed to the vertebral body of a patient to provide fixing force to the vertebral body, and comprises: a head part having a sphere shape and including a wrench groove; and a vertebral body insertion part integrated with the head part, having a spiral thread formed therein, and screwed into the vertebral body. A bone part between the peaks of the spiral thread formed in the vertebral body insertion part has a porous structure. Accordingly, the porous pedicle screw minimizes burden on the bone during implantation, thereby greatly increasing the success rate of spinal fixation in patients with severe osteoporosis and enabling rapid recovery due to a fast rate of bone fusion. In addition, the porous pedicle screw has a partial porous structure using 3D printing technology, thereby maintaining a stable fusion state through 3D bonding with surrounding bone tissue.

Description

다공성 척추경 나사못 및 상기 나사못을 구비한 척추고정술용 수술도구{Porous pedicle screw and Surgical tool for spinal fixation with the screw}Porous pedicle screw and Surgical tool for spinal fixation with the screw

본 발명은 척추고정술에 사용되는 수술도구에 관한 것으로서, 보다 상세하게는, 부분 다공성 구조를 가져 뼈조직과의 유착성이 양호하고 장착시 뼈의 부담을 최소화 할 수 있는, 다공성 척추경 나사못 및 상기 나사못을 구비한 척추고정술용 수술도구에 관한 것이다.The present invention relates to a surgical tool used for spinal fixation, and more particularly, to a porous pedicle screw, which has a partially porous structure, has good adhesion to bone tissue, and can minimize the burden on bones during installation, and the It relates to a surgical tool for spinal fixation having a screw.

척추는, 7개의 목뼈, 12개의 등뼈, 5개의 허리뼈, 5개의 엉치뼈, 4개의 꼬리뼈로 구성되며, 각각의 척추 뼈는 추간판으로 연결된다. 추간판은, 몸의 하중과 충격을 흡수 및 분산시키고, 척추 뼈가 어긋나지 않도록 잡아 줌은 물론, 척추 신경이 눌려 압축되지 않도록 두 척추 뼈를 분리시켜 척추 추간공의 범위를 원만히 유지시키는 역할을 한다. 그런데, 척추는, 노화가 진행됨에 따라, 또는 과도한 운동이나 습관화된 나쁜 자세 등과 같은 원인에 의해, 점차 변형되어 다양한 신경학적 이상증상을 발생할 수 있다.The vertebrae are composed of 7 cervical vertebrae, 12 vertebrae, 5 lumbar vertebrae, 5 sacrum, and 4 coccyx, and each vertebra is connected by an intervertebral disc. The intervertebral disc absorbs and distributes the load and shock of the body, holds the vertebrae so that the vertebrae are not misaligned, and separates the two vertebrae so that the spinal nerves are not pressed and compressed, thereby maintaining a smooth range of the intervertebral foramen. However, as aging progresses, or due to causes such as excessive exercise or habituated bad posture, the spine may be gradually deformed and various neurological abnormalities may occur.

척추와 관련된 질환으로는, 척추 측만증, 전만(후만) 전위증, 척추 탈구, 골절, 척추분리증 등이 있다. 이러한 척추질환을 치료하는 방법 중 척추교정술은, 불안정성을 일으킨 뼈를 물리적으로 고정시키는 것으로서, 인접하는 2개 이상의 척추체를 하나로 연결하는 수술이다.Diseases related to the spine include scoliosis, lordosis (kyphosis), dislocation of the spine, fractures, spondylolisthesis, and the like. Among the methods of treating such spinal diseases, chiropractic is to physically fix the bones that have caused instability, and is an operation that connects two or more adjacent vertebral bodies into one.

척추교정술에 사용되는 수술 도구에는 척추경 나사못이 포함된다. 척추경 나사못은, 척추체에 박힌 상태로 연결로드를 통해 상호 연결됨으로써 인접하는 뼈의 간격이 유지되도록 한다. 척추경 나사못을 이용한 척추교정술은 척추의 감압 및 유합에 있어서 필수적이다.Surgical instruments used in chiropractic include pedicle screws. The pedicle screw is connected to each other through a connecting rod while being embedded in the vertebral body, so that the distance between adjacent bones is maintained. Chiropractic using pedicle screws is essential for decompression and fusion of the spine.

하지만, 골다공증을 가진 환자의 경우에는 척추교정술을 통한 효과가 상대적으로 적을 수 있고, 심할 경우 교정에 실패할 수도 있다. 척추경 나사못을 이용한 치료 효과는 뼈의 기본적인 상태에 따라 크게 달라지는 것이다.However, in the case of patients with osteoporosis, the effect of chiropractic surgery may be relatively small, and in severe cases, the correction may fail. The effectiveness of treatment using pedicle screws varies greatly depending on the basic condition of the bones.

고령자들에게 있어서 골다공증은 가장 흔한 대사성 골 질환인데, 근래, 노령 인구가 증가함에 따라, 골다공증을 가진 상태에서, 퇴행성 척추 협착증, 척추 전방 전위증, 흉요추부 골절 등과 같은 척추 관련 질환을 진단받는 빈도가 증가하고 있다.Osteoporosis is the most common metabolic bone disease in the elderly. Recently, as the elderly population increases, the frequency of being diagnosed with spinal-related diseases such as degenerative spinal stenosis, anterior spondylolisthesis, and thoracic and lumbar fractures with osteoporosis increases. are doing

위에 언급한 바와 같이, 골다공증을 가지고 있는 고령자의 경우, 일반적인 척추경 나사못을 이용한 수술이, 효과가 거의 없거나 수술 자체가 불가능한 경우가 있다. 그 이유는 뼈 자체가 잘 붙지 않고, 나사못을 죌 때 뼈가 깨질 수 있기 때문이다.As mentioned above, in the case of the elderly with osteoporosis, there are cases in which surgery using general pedicle screws has little effect or the operation itself is impossible. The reason is that the bones themselves do not adhere well, and the bones may break when the screws are tightened.

골다공증을 앓고 있는 환자에게 적합한 구조의 척추경 나사못이 요구되고 있으며, 그 중에는, 나사못의 표면에, 미세한 티타늄 분말이나 수산화인염을 코팅한 것도 있다.A pedicle screw having a structure suitable for patients suffering from osteoporosis has been demanded, and among them, the surface of the screw is coated with fine titanium powder or hydroxyphosphate.

그런데 티타늄 분말이 고착되어 있는 나사못은, 나사못의 표면적이 증가하기는 하지만, 나사못을 뼈에 박아 고정할 때, 티타늄 분말이 떨어져 혈관으로 들어가거나 신경 조직 사이로 침투하여 더 큰 문제를 야기할 수 있다. 또한, 수산화인염이 코팅되어 있는 나사못도 식립 시, 수산화인염이 융해되어 주위에 염증을 야기할 수 있다.However, the screw to which the titanium powder is adhered, although the surface area of the screw increases, when the screw is driven into the bone and fixed, the titanium powder may fall and enter the blood vessel or penetrate into the nerve tissue, causing a greater problem. In addition, when a screw coated with hydroxyphosphate is placed, the hydroxyphosphate may melt and cause inflammation around it.

척추경 나사못과 관련된 배경 기술로서, 국내 등록특허공보 제10-0994184호를 통해 척추경 나사못 모듈이 개시된 바 있다. 개시된 척추경 나사못은, 몸체 일단에는 공구홈이 형성된 헤드부와, 몸체 타단에는 척추경에 삽입되는 나사부가 형성되어 있는 척추경 나사못과; 몸체 상부에 로드를 수납하기 위한 소정 깊이의 U자 형상의 수납홈이 형성되어 있고, 수납홈의 내주면을 따라 암나사부가 형성되어 있으며, 몸체 하부에는 수납홈과 연결되어 몸체를 관통하며 형성되고, 헤드부를 삽입하여 척추경 나사못과 연결할 수 있도록 형성된 연결구가 형성된 로드 고정부와; 수납홈을 통해 로드 고정부의 연결구에 삽입되는 탄성와셔 및 암나사부와 체결될 수 있도록 몸체 외경을 따라 수나사부가 형성되어 있고, 몸체 중심부에는 렌치홈이 형성되어 있는 볼트를 포함하여 구성되며, 탄성와셔는 수납홈에 로드를 안착하고 볼트를 조여주면, 로드와 밀착되며 로드와 척추경 나사못 및 로드 고정부를 서로 고정하는 동시에 로드 및 척추경 나사못 모듈에 고정된 척추 뼈마디가 소정 범위의 유동성을 가질 수 있도록 구성된다.As a background technology related to pedicle screws, a pedicle screw module has been disclosed through Korean Patent Registration No. 10-0994184. The disclosed pedicle screw includes: a pedicle screw having a head having a tool groove formed at one end of the body and a screw having a threaded portion inserted into the pedicle at the other end of the body; A U-shaped receiving groove of a predetermined depth for accommodating the rod is formed in the upper portion of the body, and a female screw portion is formed along the inner circumferential surface of the receiving groove, and is connected to the receiving groove at the bottom of the body to penetrate the body, and the head a rod fixing part having a connector formed so as to be connected to the pedicle screw by inserting the part; A male threaded part is formed along the outer diameter of the body to be fastened with an elastic washer and a female threaded part inserted into the connector of the rod fixing part through the receiving groove, and the body center includes a bolt having a wrench groove, and the elastic washer When the rod is seated in the receiving groove and the bolt is tightened, it is in close contact with the rod, and the rod and the pedicle screw and the rod fixing part are fixed to each other, and at the same time, the vertebrae fixed to the rod and the pedicle screw module can have a certain range of fluidity. is configured to

국내 등록특허공보 제10-0994184호 (척추경 나사못 모듈)Domestic Patent Publication No. 10-0994184 (Spine screw module) 국내 공개특허공보 제10-2020-0064601호 (고정력이 향상된 척추경 나사못)Domestic Patent Publication No. 10-2020-0064601 (Pedaloscope screw with improved fixation) 국내 등록특허공보 제10-0895243호 (완충형 척추경 나사못)Domestic Patent Publication No. 10-0895243 (Buffered pedicle screw)

본 발명은 상기 문제점을 해소하고자 창출한 것으로서, 골다공증이 심한 환자의 척추 고정술의 성공률을 크게 높일 수 있으며 골유합 속도가 신속하여 빠른 회복을 가능하게 하고, 주변 뼈 조직과의 3차원적 결합을 통해 안정적인 유합 상태를 유지하게 하는, 다공성 척추경 나사못 및 상기 나사못을 구비한 척추고정술용 수술도구를 제공함에 목적이 있다.The present invention was created to solve the above problems, and it can greatly increase the success rate of spinal fixation in patients with severe osteoporosis, and enables rapid recovery due to the rapid rate of bone union, and is stable through three-dimensional bonding with surrounding bone tissue. An object of the present invention is to provide a porous pedicle screw and a surgical tool for spinal fixation having the screw, which maintains the fusion state.

상기 목적을 달성하기 위한 과제의 해결수단으로서의 본 발명의 다공성 척추경 나사못은, 환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서, 구(球)의 형태를 취하며 렌치홈을 갖는 헤드부와, 상기 헤드부에 일체를 이루고 나선형 나사산을 가지며 척추체내에 박혀 고정되는 척추체 삽입부를 포함하고, 상기 척추체 삽입부에 형성된 나사산의 산부 사이의 골부는 다공성 구조를 갖는다.The porous pedicle screw of the present invention as a means of solving the problems for achieving the above object provides a fixing force to the vertebral body in a state of being screwed to the vertebral body of a patient, and takes the form of a sphere and has a head having a wrench groove and a vertebral body insertion unit integrally formed with the head unit, having a spiral thread, and fixedly embedded in the vertebral body, wherein the vertebral body insertion unit formed in the vertebral body insertion unit has a porous structure.

또한, 상기 척추경 나사못은, 티타늄이나 스테인리스스틸이나 코발트크롬 중 어느 하나를 원소재로 하여 3D 프린팅 방식을 통해 제작된다.In addition, the pedicle screw is manufactured through a 3D printing method using any one of titanium, stainless steel, and cobalt chromium as a raw material.

아울러, 상기 척추체 삽입부의 골부의 표면조도는 산부에 비해 상대적으로 높다.In addition, the surface roughness of the bone portion of the vertebral body insertion portion is relatively higher than that of the oblong portion.

또한, 상기 척추경 나사못의 중심축부에는 일정내경을 갖는 관통로가 형성되어 있고, 상기 골부에는 관통로를 측방향으로 개방하는 다수의 유합통로가 형성된다.In addition, a through passage having a predetermined inner diameter is formed in the central shaft portion of the pedicle screw, and a plurality of fusion passages for opening the passage in the lateral direction are formed in the valley portion.

또한, 상기 관통로의 내주면에는 본시멘트코팅층이 적층된다.In addition, the cement coating layer is laminated on the inner peripheral surface of the through passage.

또한, 상기 목적을 달성하기 위한 과제의 해결수단으로서의 본 발명의 척추고정술용 수술도구는, 환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서, 구(球)의 형태를 취하며 렌치홈을 갖는 헤드부와, 상기 헤드부에 일체를 이루고 나선형 나사산을 가지며 척추체내에 박혀 고정되는 척추체 삽입부를 포함하고, 상기 척추체 삽입부에 형성된 나사산의 산부 사이의 골부는 다공성 구조를 갖는 다공성 척추경 나사못과; 원통의 형태를 취하며 상기 척추경 나사못의 헤드부를 수용 지지하고 상기 헤드부의 상부를 가로지르는 연결로드를 수용하도록 상부로 개방된 U자형 지지홈이 형성되어 있는 고정바디부, 상기 고정바디부에 일체를 이루며 상호 평행하게 직선 연장되고 사이에 공간부를 제공하는 한 쌍의 연장지지부가 구비된 개방하우징을 포함한다.In addition, the surgical tool for spinal fixation of the present invention as a means of solving the problems for achieving the above object provides a fixing force to the vertebral body in a state of being screwed to the patient's vertebral body, and takes the form of a sphere and a wrench groove a vertebral body insertion unit integrally formed with the head unit and having a spiral thread and fixedly embedded in the vertebral body; ; A fixed body part having a cylindrical shape and having a U-shaped support groove that is opened upward to receive and support the head part of the pedicle screw and to receive a connecting rod crossing the upper part of the head part, and the fixed body part is integrated with the fixed body part and an open housing provided with a pair of extended support parts extending in a straight line parallel to each other and providing a space therebetween.

그리고, 상기 척추경 나사못은, 티타늄이나 스테인리스스틸이나 코발트크롬 중 어느 하나를 원소재로 하여 3D 프린팅 방식을 통해 제작된다.In addition, the pedicle screw is manufactured through a 3D printing method using any one of titanium, stainless steel, and cobalt chromium as a raw material.

아울러, 상기 척추체 삽입부의 골부의 표면조도는 산부에 비해 상대적으로 높다.In addition, the surface roughness of the bone portion of the vertebral body insertion portion is relatively higher than that of the oblong portion.

또한, 상기 척추경 나사못의 중심축부에는 일정내경을 갖는 관통로가 형성되어 있고, 상기 골부에는 관통로를 측방향으로 개방하는 다수의 유합통로가 형성된다.In addition, a through passage having a predetermined inner diameter is formed in the central shaft portion of the pedicle screw, and a plurality of fusion passages for opening the passage in the lateral direction are formed in the valley portion.

또한, 상기 관통로의 내주면에는 본시멘트코팅층이 적층된다.In addition, the cement coating layer is laminated on the inner peripheral surface of the through passage.

상기와 같이 이루어지는 본 발명의 다공성 척추경 나사못은, 식립 시 뼈에 기해지는 부담을 최소화함으로써 골다공증이 심한 환자의 척추 고정술의 성공률을 크게 높일 수 있으며 골유합 속도가 신속하여 빠른 회복을 가능하게 한다.The porous pedicle screw of the present invention made as described above can greatly increase the success rate of spinal fixation in patients with severe osteoporosis by minimizing the burden on the bone during implantation, and enables rapid recovery due to the rapid osseointegration rate.

또한, 3D 프린팅 기술을 활용한 부분 다공성 구조를 가져, 주변 뼈 조직과의 3차원적 결합을 통해 안정적인 유합 상태를 유지하게 한다.In addition, it has a partially porous structure using 3D printing technology to maintain a stable union state through three-dimensional bonding with surrounding bone tissue.

도 1은 본 발명의 일 실시예에 따른 척추고정술용 수술도구의 사시도이다.
도 2는 도 1에 도시한 수술도구의 내부 구조를 나타내 보인 단면도이다.
도 3 및 도 4는 도 1에 도시한 수술도구의 사용 방식을 설명하기 위한 도면이다.
도 5는 도 1의 척추경 나사못의 변형 예를 나타내 보인 단면도이다.1 is a perspective view of a surgical tool for spinal fixation according to an embodiment of the present invention.
2 is a cross-sectional view showing the internal structure of the surgical tool shown in FIG.
3 and 4 are diagrams for explaining a method of using the surgical tool shown in FIG. 1 .
5 is a cross-sectional view illustrating a modified example of the pedicle screw of FIG. 1 .

이하, 본 발명에 따른 하나의 실시예를 첨부된 도면을 참조하여 보다 상세히 설명하기로 한다.Hereinafter, one embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

본 발명의 척추경 나사못은, 나사못을 구성하는 골부가 다공성 구조를 가져 보다 신혹한 유합을 가능하게 한다. 이러한 척추경 나사못은, 환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서, 구(球)의 형태를 취하며 렌치홈을 갖는 헤드부와, 상기 헤드부에 일체를 이루고 나선형 나사산을 가지며 척추체내에 박혀 고정되는 척추체 삽입부를 포함하고, 상기 척추체 삽입부에 형성된 나사산의 산부 사이의 골부는 다공성 구조를 갖는다.In the pedicle screw of the present invention, the bone portion constituting the screw has a porous structure, enabling more reliable union. The pedicle screw provides a fixing force to the vertebral body in a state of being screwed to the patient's vertebral body, and has a spherical shape and a head part having a wrench groove, integral with the head part and has a helical thread, It includes a vertebral body insert that is embedded and fixed in the vertebral body, and the bone part between the ridges of the screw threads formed in the vertebral body insert has a porous structure.

또한, 본 발명의 척추고정술용 수술도구는, 환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서, 구(球)의 형태를 취하며 렌치홈을 갖는 헤드부와, 상기 헤드부에 일체를 이루고 나선형 나사산을 가지며 척추체내에 박혀 고정되는 척추체 삽입부를 포함하고, 상기 척추체 삽입부에 형성된 나사산의 산부 사이의 골부는 다공성 구조를 갖는 다공성 척추경 나사못과; 원통의 형태를 취하며 상기 척추경 나사못의 헤드부를 수용 지지하고 상기 헤드부의 상부를 가로지르는 연결로드를 수용하도록 상부로 개방된 U자형 지지홈이 형성되어 있는 고정바디부, 상기 고정바디부에 일체를 이루며 상호 평행하게 직선 연장되고 사이에 공간부를 제공하는 한 쌍의 연장지지부가 구비된 개방하우징을 포함한다.In addition, the surgical tool for spinal fixation of the present invention provides a fixing force to the vertebral body in a state of being screwed to the patient's vertebral body. and a vertebral body insert having a helical thread and fixed in the vertebral body; A fixed body part having a cylindrical shape and having a U-shaped support groove that is opened upward to receive and support the head part of the pedicle screw and to receive a connecting rod crossing the upper part of the head part, and the fixed body part is integrated with the fixed body part and an open housing provided with a pair of extended support parts extending in a straight line parallel to each other and providing a space therebetween.

도 1은 본 발명의 일 실시예에 따른 척추고정술용 수술도구(10)의 사시도이고, 도 2는 도 1에 도시한 수술도구의 내부 구조를 나타내 보인 단면도이다.1 is a perspective view of a surgical tool 10 for spinal fixation according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the internal structure of the surgical tool shown in FIG. 1 .

도시한 바와 같이, 본 실시예에 따른 척추고정술용 수술도구(10)는, 척추경 나사못(40), 인너캡(30), 개방하우징(20), 조작기(61)를 포함한다. As shown, the surgical tool 10 for spinal fixation according to the present embodiment includes a pedicle screw 40 , an inner cap 30 , an open housing 20 , and a manipulator 61 .

척추경 나사못(40)은, 티타늄이나 스테인리스스틸이나 코발트크롬 중 어느 하나를 원소재로 하여 3D 프린팅 방식을 통해 제작된 것으로서 전체가 일체를 이룬다. 척추경 나사못(40)은, 도 4에 도시한 바와 같이, 척추체(100)의 내부에 박혀 고정된 상태로 척추체에 고정력을 제공한다. The pedicle screw 40 is manufactured through a 3D printing method using any one of titanium, stainless steel, and cobalt chromium as a raw material, and the whole is integral. The pedicle screw 40, as shown in FIG. 4, provides a fixing force to the vertebral body in a fixed state by being embedded in the inside of the vertebral body 100.

알려진 바와 같이, 척추고정술은 여러 개의 척추체에 척추경 나사못을 박고, 각각의 나사못을 연결로드를 이용해 연결하여 척추체의 움직임을 방지하는 것이다. 척추경 나사못(40)은 척추체에 박혀 고정되고, 후술할 고정바디부(23)가 연결로드와 척추경 나사못을 연결한다.As is known, spinal fixation is to prevent movement of the vertebral body by driving a pedicle screw into several vertebral bodies, and connecting each screw using a connecting rod. The pedicle screw 40 is fixed to the vertebral body, and a fixing body part 23 to be described later connects the connecting rod and the pedicle screw.

척추경 나사못(40)은 헤드부(41)와 척추체 삽입부(43)를 포함한다. 헤드부(41)는, 상단부가 평평한 부분 구(球)의 형태를 취하고 상부로 개방된 렌치홈(41a)을 갖는다. 렌치홈(41a)은 육각홈으로서 육각렌치(미도시)가 끼워진다. 육각렌치는, 조작기(도 3의 61)의 단부에 구비되며, 조작기(61)를 개방하우징(20)에 결합함에 따라 렌치홈(41a)에 끼워진다. The pedicle screw 40 includes a head portion 41 and a vertebral body insertion portion 43 . The head portion 41 has a wrench groove 41a that has a flat upper end in the form of a partial sphere and is opened upward. The wrench groove 41a is a hexagonal groove, and a hexagonal wrench (not shown) is inserted thereinto. The hexagon wrench is provided at the end of the manipulator (61 in FIG. 3), and is fitted into the wrench groove 41a as the manipulator 61 is coupled to the open housing 20.

척추체 삽입부(43)는, 헤드부(41)에 일체를 이루고 외주부에 나선형 나사산을 가지는 스크류이다. 이러한 척추체 삽입부(43)는, 일정 내경의 관통로(43e)를 갖는 다공본체(43m)와, 다공본체(43m)의 외주면에 나선형으로 형성된 산부(43a)로 이루어진다. 다공본체(43m)는 하부로 갈수록 외경이 작아지는, 이를테면, 파이프의 형태를 취한다. 상기 관통로(43e)는 척추경 나사못(40)의 길이방향으로 관통된 구멍이다.The vertebral body insertion part 43 is a screw integral with the head part 41 and having a helical thread in the outer peripheral part. The vertebral body insert 43 includes a porous body 43m having a through passage 43e of a predetermined inner diameter, and a ridge 43a spirally formed on the outer circumferential surface of the porous body 43m. The porous body (43m) has an outer diameter that decreases toward the bottom, for example, takes the form of a pipe. The through passage 43e is a hole penetrated in the longitudinal direction of the pedicle screw 40 .

아울러 다공본체(43m)에는 다수의 유합통로(43q)가 형성된다. 유합통로(43q)는 산부(43a) 사이의 골부(43k)에 위치되며, 관통로(43e)를 측부로 개방한다. 유합통로(43q)는, 척추체 내부의 뼈 조직에 대한 척추체 삽입부(43)의 고정력을 강화시킨다. 또한, 도 5에 도시한 바와 같이, 관통로(43e) 내주면에 본시멘트코팅층(43p)이 코팅된 경우때 뼈조직과 본시멘트를 연결시키는 연결통로의 역할을 하기도 한다.In addition, a plurality of fusion passages 43q are formed in the porous body 43m. The fusion passage 43q is located in the valley portion 43k between the peaks 43a, and opens the through passage 43e to the side. The fusion passage 43q enhances the fixing force of the vertebral body insert 43 to the bone tissue inside the vertebral body. In addition, as shown in FIG. 5, when the bone cement coating layer 43p is coated on the inner circumferential surface of the through passage 43e, it also serves as a connecting passage connecting the bone tissue and the bone cement.

다공본체(43m)는 오픈셀 구조의 망상구조를 이루며 내부에 무수한 공극을 갖는다. 공극은 척추체 내부의 뼈조직과 척추체 삽입부(43)의 유합율을 크게 높이는 역할을 한다. 다공본체(43m)는 산부(43a)의 사이로 노출되므로, 나사산의 산부 사이의 골부(43k)가 다공성 구조를 갖는 것이다. The porous body 43m has a network structure of an open cell structure and has countless voids therein. The void plays a role in greatly increasing the fusion rate between the bone tissue inside the vertebral body and the vertebral body insertion unit 43 . Since the porous body 43m is exposed between the peaks 43a, the valleys 43k between the peaks of the screw thread have a porous structure.

골부(43k)의 표면조도는 산부(43a)의 표면조도에 비해 상대적으로 높다. 말하자면, 산부(43a)의 표면은 맨질맨질 하고, 골부(43k)의 표면은 (상기한 바와 같이 다공성 구조를 가지므로) 꺼끌꺼끌 한 것이다. 산부(43a)의 조직밀도가 골부(43k)의 조직밀도에 비해 높음은 당연하다. 이와 같이, 골부(43k)의 표면이 꺼끌꺼끌 하므로, 척추경 나사못(40)과 주변 뼈조직과의 유착을 보다 적극적으로 도모할 수 있다.The surface roughness of the valley part 43k is relatively high compared to the surface roughness of the peak part 43a. In other words, the surface of the ridge part 43a is polished, and the surface of the valley part 43k is rough (since it has a porous structure as described above). It is natural that the tissue density of the ridge 43a is higher than that of the bone 43k. In this way, since the surface of the bone portion 43k is rough, it is possible to more actively promote adhesion between the pedicle screw 40 and the surrounding bone tissue.

또한, 산부(43a)의 표면이 매끄러우므로, 척추경 나사못(40)의 나사 결합 시 과도한 토크가 가해지지 않는다. 토크가 과도하면 열이 발생하고 열은 뼈의 괴사를 유발할 수 있다. In addition, since the surface of the mountain portion 43a is smooth, excessive torque is not applied when screwing the pedicle screw 40 . Excessive torque generates heat, which can cause bone necrosis.

상기 구성을 갖는 척추경 나사못(40)은, 개방하우징(20)의 공간부(20a)로 삽입된 후, 헤드부(41)가 개방하우징(20)의 걸림구멍(23c)에 걸릴 때 까지 하강한다. 척추경 나사못(40)은 개방하우징(20)의 하단부에 걸린 상태로 전후좌우로 회전 가능하다.The pedicle screw 40 having the above configuration is inserted into the space portion 20a of the open housing 20 and then descends until the head portion 41 is caught in the locking hole 23c of the open housing 20 . do. The pedicle screw 40 is rotatable back and forth, left and right, while being hooked on the lower end of the open housing 20 .

개방하우징(20)은, 척추경 나사못(40)을 척추체 방향으로 가이드 함과 아울러, 수술에 필요한 조작기(61)를 지지하는 역할을 한다. 개방하우징(20)의 일부, 즉 연장지지부(21)는 수술 후 절단되어 버려지고, 고정바디부(23)는 연결로드(도 4의 105), 로드고정스크류(107)와 함께 몸속에 남아 있는다.The open housing 20 serves to guide the pedicle screw 40 in the direction of the vertebral body and support the manipulator 61 necessary for surgery. A part of the open housing 20, that is, the extended support part 21, is cut and discarded after surgery, and the fixed body part 23 remains in the body together with the connecting rod (105 in FIG. 4) and the rod fixing screw 107. .

개방하우징(20)은, 고정바디부(23)와 두 개의 연장지지부(21)로 이루어진다. 고정바디부(23)는 상부로 개방된 대략 원통형 부재로서, 척추경 나사못의 헤드부(41)를 수용지지 한다. 이를 위해 고정바디부(23)의 하단부에는 걸림구멍(23c)이 형성되어 있다. 걸림구멍(23c)은 헤드부(41)의 직경보다 작은 내경을 갖는 구멍으로서, 척추체 삽입부(43)는 통과시키고 헤드부(41)는 하부로 빠지지 않게 지지한다.The open housing 20 includes a fixed body portion 23 and two extended support portions 21 . The fixed body part 23 is a substantially cylindrical member that is opened upward, and receives and supports the head part 41 of the pedicle screw. To this end, a locking hole 23c is formed at the lower end of the fixed body portion 23 . The locking hole 23c is a hole having an inner diameter smaller than the diameter of the head portion 41, and the vertebral body insertion portion 43 passes and the head portion 41 is supported so as not to fall downward.

아울러 고정바디부(23)의 내주면에는 지지곡면부(25)가 형성되어 있다. 지지곡면부(25)는 헤드부(41)의 외주면과 면접하는 지지면이다. 헤드부(41)는 지지곡면부(25)에 면접하며 습동 가능하다. 또한 고정바디부(23)에는 두 개의 지지홈(23a)이 마련되어 있다. 지지홈(23a)은 헤드부(41)의 상부를 가로지르는 연결로드(도 4의 105)를 받치는 홈으로서 상부로 개방된 U자의 형상을 갖는다.In addition, a support curved surface portion 25 is formed on the inner circumferential surface of the fixed body portion 23 . The support curved surface portion 25 is a support surface that is in contact with the outer peripheral surface of the head portion (41). The head part 41 is slidable while interviewing the support curved surface part 25 . In addition, the fixed body portion 23 is provided with two support grooves (23a). The support groove 23a is a groove for supporting the connecting rod (105 in FIG. 4) crossing the upper part of the head part 41, and has a U-shape opened upward.

연장지지부(21)는, 고정바디부(23)에 일체를 이루는 막대형 부재로서, 두 개가 상호 평행하게 직선 연장되고 사이에 공간부(20a)를 제공한다. 연장지지부(21)는 길이방향으로 일정 곡률을 갖는 원호의 형상을 취한다. The extended support portion 21 is a rod-shaped member integral with the fixed body portion 23, and the two extend in a straight line parallel to each other and provide a space portion 20a therebetween. The extended support part 21 takes the shape of a circular arc having a certain curvature in the longitudinal direction.

연장지지부(21)와 고정바디부(23)는 분절홈(22)으로 구획된다. 분절홈(22)은, 가령 연장지지부(21)를 화살표 s방향으로 당길 때 절단되는 부분이다. 척추 고정수술의 종료 후, 연장지지부(21)를 꺾어 절단하고 절단된 연장지지부(21)는 폐기한다. The extended support part 21 and the fixed body part 23 are partitioned by a segmented groove 22 . The segmental groove 22 is, for example, a part cut when the extended support part 21 is pulled in the arrow s direction. After completion of the spinal fixation surgery, the extended support part 21 is cut and cut, and the cut extended support part 21 is discarded.

또한, 연장지지부(21)와 고정바디부(23)의 내주면에는 암나사부(24)가 형성되어 있다. 암나사부(24)는 인너캡(30)과 수술용 조작기(61)가 나사 결합하는 부분이다. 즉, 조작기(61)의 외주면에 형성되어 있는 수나사부(61b)와 결합한다.In addition, a female screw part 24 is formed on the inner peripheral surface of the extended support part 21 and the fixed body part 23 . The female screw part 24 is a part in which the inner cap 30 and the surgical manipulator 61 are screwed together. That is, it engages with the male screw portion 61b formed on the outer circumferential surface of the manipulator 61 .

인너캡(30)은, 외주면에 수나사산이 형성되어 있는 링형부재로서 암나사부(24)에 나사 결합한 상태로 척추경 나사못(40)을 하향 가압한다. 인너캡(30)을 이용해 척추경 나사못(40)을 보다 안정적으로 고정할 수 있다. The inner cap 30 is a ring-shaped member having a male screw thread formed on its outer circumferential surface, and presses the pedicle screw 40 downward while being screwed to the female screw part 24 . The pedicle screw 40 can be more stably fixed by using the inner cap 30 .

조작기(61)는, 개방하우징(20)에 장착된 상태로 렌치홈(41a)에 연결되고, 개방하우징(20)과 함께 축회전하며 척추경 나사못(40)을 돌린다. 개방하우징(20)과 조작기(61)가 회전함에 따라 척추경 나사못(40)이 척추체(100) 내부로 진입하게 한다. 이러한 기능을 수행할 수 있는 한, 조작기(61) 자체의 구성은 얼마든지 달라질 수 있다.The manipulator 61 is connected to the wrench groove 41a in a state of being mounted on the open housing 20 , rotates axially together with the open housing 20 and turns the pedicle screw 40 . As the open housing 20 and the manipulator 61 rotate, the pedicle screw 40 enters the vertebral body 100 . As long as these functions can be performed, the configuration of the manipulator 61 itself may be varied.

도 3 및 도 4는 도 1에 도시한 수술도구(10)의 사용 방식을 설명하기 위한 도면이다.3 and 4 are diagrams for explaining a method of using the surgical tool 10 shown in FIG.

먼저, 척추경 나사못(40)을 척추체(100)에 박아 고정하기 위해서, 의료용 드릴 등의 천공도구를 이용해 척추체(100)에 (척추체 삽입부(43)가 끼워질) 공간을 미리 확보한다. First, in order to drive and fix the pedicle screw 40 to the vertebral body 100 , a space (where the vertebral body insert 43 is inserted) is secured in advance in the vertebral body 100 using a drilling tool such as a medical drill.

공간이 확보되면, 개방하우징(20)에 조작기(61)를 끼운 상태로, 개방하우징(20)과 조작기(61)를 함께 회전시켜, 척추경 나사못(40)이 척추체(100)의 목적지점에 도달하게 한다. When the space is secured, the open housing 20 and the manipulator 61 are rotated together with the manipulator 61 inserted in the open housing 20, so that the pedicle screw 40 is positioned at the destination point of the vertebral body 100. to reach

상기 과정을 통해 척추경 나사못(40)이 정위치 되었다면, 조작기(61)를 빼내고, 지지홈(23a)을 통해 연결로드(105)를 통과시키고, 로드고정스크류(107)를 이용해 연결로드(105)를 하향 가압한다. 연결로드(105)는 이웃하는 다른 고정바디부(23)의 지지홈(23a)에 걸쳐진 상태로, 다른 로드고정스크류(107)에 의해 고정된다. 이웃하는 다수의 고정바디부(23)의 간격이 연결로드(105)에 의해 유지되는 것이다. 이러한 수술 방법 자체는 일반적인 것이므로 더 이상의 설명은 생략하기로 한다. 상기 과정이 완료되었다면 연장지지부(21)를 꺽어 절단 한 후 수술을 마무리한다.If the pedicle screw 40 has been positioned through the above process, the manipulator 61 is removed, the connecting rod 105 is passed through the support groove 23a, and the connecting rod 105 is used using the rod fixing screw 107. ) is pressed downward. The connecting rod 105 is fixed by another rod fixing screw 107 while being spanned over the support groove 23a of the other fixing body part 23 adjacent thereto. The interval between a plurality of adjacent fixed body parts 23 is maintained by the connecting rod 105 . Since these surgical methods themselves are general, further description will be omitted. If the above process is completed, the extended support part 21 is bent and cut, and then the operation is finished.

도 5는 도 1에 도시한 척추경 나사못(40)의 변형 예를 나타내 보인 단면도이다.5 is a cross-sectional view showing a modified example of the pedicle screw 40 shown in FIG.

도면을 참조하면, 척추경 나사못(40)의 관통로(43e) 내주면에 본시멘트코팅층(43p)이 적층되어 있음을 알 수 있다. 본시멘트코팅층(43p)은 본시멘트를 관통로(43e) 내주면에 도포하여 형성한 것으로서, 유합통로(43q)를 통해 외부로 개방되어 있다. 골부(43k)를 둘러싸고 있는 뼈조직은 유합통로(43q)를 통해 본시멘트코팅층(43p)과 유착될 수 있다. 본시멘트코팅층(43p)을 적용함으로써 척추경 나사못(40)의 고정이 보다 안정적으로 유지된다.Referring to the drawings, it can be seen that the cement coating layer 43p is laminated on the inner circumferential surface of the through passage 43e of the pedicle screw 40 . The main cement coating layer 43p is formed by coating the main cement on the inner circumferential surface of the through passage 43e, and is opened to the outside through the fusion passage 43q. The bone tissue surrounding the bone (43k) may be coalesced with the cement coating layer (43p) through the union passage (43q). By applying the cement coating layer 43p, the fixation of the pedicle screw 40 is more stably maintained.

이상, 본 발명을 구체적인 실시예를 통하여 상세하게 설명하였으나, 본 발명은 상기 실시예에 한정하지 않고, 본 발명의 기술적 사상의 범위 내에서 통상의 지식을 가진 자에 의하여 여러 가지 변형이 가능하다.As mentioned above, although the present invention has been described in detail through specific embodiments, the present invention is not limited to the above embodiments, and various modifications are possible by those of ordinary skill within the scope of the technical spirit of the present invention.

10:수술도구 20:개방하우징 20a:공간부
21:연장지지부 22:분절홈 23:고정바디부
23a:지지홈 23c:걸림구멍 24:암나사부
25:지지곡면부 30:인너캡 40:척추경 나사못
41:헤드부 41a:렌치홈 43:척추체삽입부
43a:산부 43e:관통로 43k:골부
43m:다공본체 43p:본시멘트코팅층 43q:유합통로
50:본시멘트주입기 51:회전실린더 51a:수나사부
51c:손가락지지부 53:피스톤 53a:주사기결합부
53c:손잡이 55:주사기 55a:배출구
61:조작기 61a:수나사부 100:척추체
105:연결로드 107:로드고정스크류10: surgical tool 20: open housing 20a: space part
21: extended support part 22: segment groove 23: fixed body part
23a: support groove 23c: locking hole 24: female thread part
25: support curved part 30: inner cap 40: spinal screw
41: head part 41a: wrench groove 43: vertebral body insertion part
43a: Obstetric 43e: Passage 43k: Bone
43m: porous body 43p: main cement coating layer 43q: union passage
50: main cement injector 51: rotary cylinder 51a: male thread part
51c: finger support 53: piston 53a: syringe coupling part
53c: handle 55: syringe 55a: outlet
61: manipulator 61a: male thread part 100: vertebral body
105: connecting rod 107: rod fixing screw

Claims (10)

환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서,
구(球)의 형태를 취하며 렌치홈을 갖는 헤드부와, 상기 헤드부에 일체를 이루고 나선형 나사산을 가지며 척추체내에 박혀 고정되는 척추체 삽입부를 포함하고,
상기 척추체 삽입부에 형성된 나사산의 산부 사이의 골부는 다공성 구조를 갖는,
다공성 척추경 나사못.As providing a fixing force to the vertebral body in a state of being screwed to the patient's vertebral body,
It takes the shape of a sphere and includes a head part having a wrench groove, and a vertebral body insertion part integrally formed with the head part, having a spiral thread, and fixedly embedded in the vertebral body,
The bone portion between the ridges of the screw thread formed in the vertebral body insert has a porous structure,
Porous pedicle screws. 제1항에 있어서,
상기 척추경 나사못은, 티타늄이나 스테인리스스틸이나 코발트크롬 중 어느 하나를 원소재로 하여 3D 프린팅 방식을 통해 제작된,
다공성 척추경 나사못.According to claim 1,
The pedicle screw is manufactured through a 3D printing method using either titanium, stainless steel, or cobalt chromium as a raw material,
Porous pedicle screws. 제1항에 있어서,
상기 척추체 삽입부의 골부의 표면조도는 산부에 비해 상대적으로 높은,
다공성 척추경 나사못.According to claim 1,
The surface roughness of the bony part of the vertebral body insertion part is relatively high compared to the ridge part,
Porous pedicle screws. 제1항에 있어서,
상기 척추경 나사못의 중심축부에는 일정내경을 갖는 관통로가 형성되어 있고,
상기 골부에는 관통로를 측방향으로 개방하는 다수의 유합통로가 형성된,
다공성 척추경 나사못.According to claim 1,
A through passage having a certain inner diameter is formed in the central shaft portion of the pedicle screw,
A plurality of fusion passages for laterally opening the through passages are formed in the valley portion,
Porous pedicle screws. 제4항에 있어서,
상기 관통로의 내주면에는 본시멘트코팅층이 적층된,
다공성 척추경 나사못.5. The method of claim 4,
A cement coating layer is laminated on the inner circumferential surface of the through passage,
Porous pedicle screws. 환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서, 구(球)의 형태를 취하며 렌치홈을 갖는 헤드부와, 상기 헤드부에 일체를 이루고 나선형 나사산을 가지며 척추체내에 박혀 고정되는 척추체 삽입부를 포함하고, 상기 척추체 삽입부에 형성된 나사산의 산부 사이의 골부는 다공성 구조를 갖는 다공성 척추경 나사못과;
원통의 형태를 취하며 상기 척추경 나사못의 헤드부를 수용 지지하고 상기 헤드부의 상부를 가로지르는 연결로드를 수용하도록 상부로 개방된 U자형 지지홈이 형성되어 있는 고정바디부, 상기 고정바디부에 일체를 이루며 상호 평행하게 직선 연장되고 사이에 공간부를 제공하는 한 쌍의 연장지지부가 구비된 개방하우징을 포함하는,
척추고정술용 수술도구.A vertebral body that provides a fixing force to the vertebral body in a state of being screwed to the patient's vertebral body, a vertebral body having a sphere shape and having a wrench groove, and a vertebral body integrally formed with the head part and having a helical thread and fixed in the vertebral body a porous pedicle screw having a porous structure, comprising an insertion portion, wherein the bone portion between the ridges of the screw thread formed in the vertebral body insertion portion;
A fixed body part having a cylindrical shape and having a U-shaped support groove that is opened upward to receive and support the head part of the pedicle screw and to receive a connecting rod crossing the upper part of the head part, the fixed body part being integral with the fixed body part Containing an open housing provided with a pair of extended support portions extending in a straight line parallel to each other and providing a space therebetween,
Surgical instruments for spinal fixation. 제6항에 있어서,
상기 척추경 나사못은, 티타늄이나 스테인리스스틸이나 코발트크롬 중 어느 하나를 원소재로 하여 3D 프린팅 방식을 통해 제작된,
척추고정술용 수술도구.7. The method of claim 6,
The pedicle screw is manufactured through a 3D printing method using either titanium, stainless steel, or cobalt chromium as a raw material,
Surgical instruments for spinal fixation. 제6항에 있어서,
상기 척추체 삽입부의 골부의 표면조도는 산부에 비해 상대적으로 높은,
척추고정술용 수술도구.7. The method of claim 6,
The surface roughness of the bony part of the vertebral body insertion part is relatively high compared to the ridge part,
Surgical instruments for spinal fixation. 제6항에 있어서,
상기 척추경 나사못의 중심축부에는 일정내경을 갖는 관통로가 형성되어 있고,
상기 골부에는 관통로를 측방향으로 개방하는 다수의 유합통로가 형성된,
척추고정술용 수술도구.7. The method of claim 6,
A through passage having a certain inner diameter is formed in the central shaft portion of the pedicle screw,
A plurality of fusion passages for laterally opening the through passages are formed in the valley portion,
Surgical instruments for spinal fixation. 제9항에 있어서,
상기 관통로의 내주면에는 본시멘트코팅층이 적층된,
척추고정술용 수술도구.10. The method of claim 9,
A cement coating layer is laminated on the inner circumferential surface of the through passage,
Surgical instruments for spinal fixation.
KR1020200126510A 2020-09-29 2020-09-29 Porous pedicle screw and Surgical tool for spinal fixation with the screw KR102545243B1 (en)

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