KR20220043283A - Bone cement injection type pedicle screw and Surgical tool for spinal fixation equipped with the screw - Google Patents

Bone cement injection type pedicle screw and Surgical tool for spinal fixation equipped with the screw Download PDF

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KR20220043283A
KR20220043283A KR1020200126509A KR20200126509A KR20220043283A KR 20220043283 A KR20220043283 A KR 20220043283A KR 1020200126509 A KR1020200126509 A KR 1020200126509A KR 20200126509 A KR20200126509 A KR 20200126509A KR 20220043283 A KR20220043283 A KR 20220043283A
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vertebral body
bone cement
screw
head part
bone
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KR1020200126509A
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Korean (ko)
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KR102537768B1 (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
    • A61B17/7097—Stabilisers comprising fluid filler in an implant, e.g. balloon; devices for inserting or filling such implants
    • A61B17/7098—Stabilisers comprising fluid filler in an implant, e.g. balloon; devices for inserting or filling such implants wherein the implant is permeable or has openings, e.g. fenestrated screw
    • 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
    • A61B17/7074—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
    • 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
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8802—Equipment for handling bone cement or other fluid fillers

Abstract

The present invention relates to a bone cement injection-type 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 partial sphere shape and having an upwardly open wrench groove; and a vertebral body insertion part integrated with the head part, having spiral peak and valley parts formed on the outer circumferential surface, and screwed into the vertebral body. An internal passage open to the upper part of the head part through the wrench groove and receiving bone cement injected from the outside is formed inside the head part and the vertebral body insertion part and a plurality of outflow holes are formed in a bone part to discharge the bone cement injected into the inner passage toward the periphery of the vertebral body insertion part. Accordingly, the bone cement injection-type pedicle screw ejects the bone cement injected from the outside to the surroundings while being inserted into the vertebral body to enhance the strength of the vertebral body, 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 bone cement injection-type pedicle screw has a porous structure using 3D printing technology, thereby maintaining a stable fusion state through 3D bonding with surrounding bone tissue.

Description

본시멘트 주입형 척추경 나사못 및 상기 나사못을 구비한 척추고정술용 수술도구{Bone cement injection type pedicle screw and Surgical tool for spinal fixation equipped with the screw}Bone cement injection type pedicle screw and Surgical tool for spinal fixation equipped with the screw

본 발명은 척추고정술에 사용되는 수술도구에 관한 것으로서, 보다 상세하게는, 수술 시 척추체 내에 본시멘트를 주입할 수 있는, 본시멘트 주입형 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 bone cement injection type pedicle screw capable of injecting bone cement into a vertebral body during surgery, and a surgical tool for spinal fixation having the screw. it's about

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.There is a demand for a pedicle screw having a structure suitable for patients suffering from osteoporosis, 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 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 유지할 수 있는, 본시멘트 주입형 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 bone cement injection type pedicle screw, which can maintain a fusion state, and a surgical tool for spinal fixation having the screw.

상기 목적을 달성하기 위한 과제의 해결수단으로서의 본 발명의 본시멘트 주입형 척추경 나사못은, 환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서, 부분 구(球)의 형태를 취하며, 상부로 개방된 렌치홈을 갖는 헤드부와, 상기 헤드부에 일체를 이루고 외주면에 나선형 산부와 골부가 형성되며, 척추체 내에 나사 결합되는 척추체삽입부를 포함하고, 상기 헤드부와 척추체삽입부의 내부에는, 렌치홈을 통과해 헤드부의 상부로 개방되며, 외부로부터 주입된 본시멘트를 받아 들이는 내부통로가 형성되어 있고, 상기 골부에는, 상기 내부통로로 주입된 본시멘트를 척추체삽입부의 주변 방향으로 배출하는 다수의 유출구멍이 형성되어 있다.The present cement injection type 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 patient's vertebral body, and takes the form of a partial sphere, A head part having a wrench groove open upward, a vertebral body insertion part integrally formed with the head part, a spiral mountain part and a valley part are formed on the outer peripheral surface, and screwed into the vertebral body, wherein the head part and the vertebral body insertion part are inside, It passes through the wrench groove and is opened to the upper part of the head part, and an internal passage for receiving bone cement injected from the outside is formed, and in the bone part, the bone cement injected through the internal passage is discharged in the peripheral direction of the vertebral body insertion part. A plurality of outlet holes are formed.

또한, 상기 내부통로는; 상기 헤드부와 척추체삽입부의 중심축부에 형성되며, 일정 내경을 가지고 척추체삽입부의 길이방향으로 개방된다.In addition, the inner passage; It is formed on the central axis of the head and the vertebral body insertion unit, and has a predetermined inner diameter and is opened in the longitudinal direction of the vertebral body insertion unit.

또한, 상기 척추체삽입부는; 상대적으로 작은 피치의 산부가 위치하는 제1나사부와, 상기 제1나사부에 포함된 산부보다 큰 피치를 갖는 제2나사부를 포함한다.In addition, the vertebral body insertion unit; It includes a first screw portion in which the peaks having a relatively small pitch are positioned, and a second screw portion having a larger pitch than the peaks included in the first screw portion.

그리고, 제2나사부의 골부를 따라 형성된 다수의 메인유출구멍과, 제1나사부의 골부를 따라 형성된 다수의 미세유출구멍이다.And, there are a plurality of main outlet holes formed along the valley of the second screw portion and a plurality of fine outlet holes formed along the valley portion of the first screw portion.

또한, 상기 메인유출구멍의 내경은, 산부 피치의 1/3 내지 2/3이다.In addition, the inner diameter of the main outlet hole is 1/3 to 2/3 of the pitch of the peaks.

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.

또한, 상기 목적을 달성하기 위한 과제의 해결수단으로서의 척추고정술용 수술도구는, 환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서, 부분 구(球)의 형태를 취하며, 상부로 개방된 렌치홈을 갖는 헤드부와, 상기 헤드부에 일체를 이루고 외주면에 나선형 산부와 골부가 형성되며, 척추체 내에 나사 결합되는 척추체삽입부를 포함하고, 상기 헤드부와 척추체삽입부의 내부에는, 렌치홈을 통과해 헤드부의 상부로 개방되며, 외부로부터 주입된 본시멘트를 받아 들이는 내부통로가 형성되어 있고, 상기 골부에는, 상기 내부통로로 주입된 본시멘트를 척추체삽입부의 주변 방향으로 배출하는 다수의 유출구멍이 형성되어 있는 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 연장지지부를 갖는 개방하우징과; 상기 개방하우징에 장착되며 본시멘트를 상기 척추경 나사못의 내부통로로 압입하는 본시멘트주입기를 포함한다.In addition, a surgical tool for spinal fixation as a solution to the problem 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 partial sphere and opens upward a head part having a wrench groove formed in the head, a vertebral body insertion part which is integral with the head part, a spiral mountain part and a trough part are formed on the outer circumferential surface, and is screwed into the vertebral body; It passes through and is opened to the upper part of the head part, and an internal passage for receiving the bone cement injected from the outside is formed, and in the bone part, a plurality of outflows for discharging the bone cement injected through the internal passage in the peripheral direction of the vertebral body insertion part a pedicle screw having a hole formed therein; 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 an open housing having a pair of extended support parts extending in a straight line parallel to each other and providing a space therebetween; and a bone cement injector mounted on the open housing and press-fitting the bone cement into the inner passage of the pedicle screw.

그리고, 상기 내부통로는; 상기 헤드부와 척추체삽입부의 중심축부에 형성되며, 일정 내경을 가지고 척추체삽입부의 길이방향으로 개방된다.And, the inner passage; It is formed on the central axis of the head and the vertebral body insertion unit, and has a predetermined inner diameter and is opened in the longitudinal direction of the vertebral body insertion unit.

또한, 상기 척추체삽입부는; 상대적으로 작은 피치의 산부가 위치하는 제1나사부와, 상기 제1나사부에 포함된 산부보다 큰 피치를 갖는 제2나사부를 포함한다.In addition, the vertebral body insertion unit; It includes a first screw portion in which the peaks having a relatively small pitch are positioned, and a second screw portion having a larger pitch than the peaks included in the first screw portion.

또한, 상기 유출구멍은; 제2나사부의 골부를 따라 형성된 다수의 메인유출구멍과, 제1나사부의 골부를 따라 형성된 다수의 미세유출구멍으로 이루어진다.In addition, the outlet hole; It consists of a plurality of main outlet holes formed along the valleys of the second screw part, and a plurality of fine outlet holes formed along the valleys of the first screw part.

아울러, 상기 메인유출구멍의 내경은, 산부 피치의 1/3 내지 2/3이다.In addition, the inner diameter of the main outlet hole is 1/3 to 2/3 of the peak pitch.

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.

상기와 같이 이루어지는 본 발명의 본시멘트 주입형 척추경 나사못은, 척추체 내에 삽입된 상태로, 외부로부터 주입된 본시멘트를 주변으로 분출하여 척추체의 강도를 강화시키므로, 골다공증이 심한 환자의 척추 고정술의 성공률을 크게 높일 수 있으며 골유합 속도가 신속하여 빠른 회복을 가능하게 한다.The bone cement injection type pedicle screw of the present invention, which is made as described above, is inserted into the vertebral body and ejects the bone cement injected from the outside to strengthen the strength of the vertebral body, so the success rate of spinal fixation in patients with severe osteoporosis It can significantly increase bone spurs and allows for rapid recovery due to the rapid rate of bone union.

또한 3D프린팅 기술을 이용한 다공성 구조를 가져, 주변 뼈 조직과의 3차원적 결합을 통해 안정적인 유합 상태를 유지할 수 있다.In addition, it has a porous structure using 3D printing technology, and can 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 분해 사시도이다.
도 3은 도 1의 수술도구의 내부 구조를 설명하기 위한 단면도이다.
도 4는 본 발명의 일 실시예에 따른 척추고정술용 수술도구의 사용 방법을 설명하기 위한 도면이다.
도 5 및 도 6은 도 1에 도시한 척추 고정술용 수술도구의 사용 방법을 설명하기 위한 도면이다.1 is a perspective view of a surgical tool for spinal fixation according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of the surgical tool shown in Figure 1;
3 is a cross-sectional view for explaining the internal structure of the surgical tool of FIG.
4 is a view for explaining a method of using a surgical tool for spinal fixation according to an embodiment of the present invention.
5 and 6 are views for explaining a method of using the surgical tool for spinal fixation shown in 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, 나사못 자체가 결합력을 제공함은 물론 본시멘트를 도입하는 도입관의 역할을 겸한다. 척추경 나사못을 연결통로로 삼하 척추체 내에 본시멘트를 주입할 수 있는 것이다. 이러한 척추경 나사못은, 환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서, 부분 구(球)의 형태를 취하며, 상부로 개방된 렌치홈을 갖는 헤드부와, 상기 헤드부에 일체를 이루고 외주면에 나선형 산부와 골부가 형성되며, 척추체 내에 나사 결합되는 척추체삽입부를 포함하고, 상기 헤드부와 척추체삽입부의 내부에는, 렌치홈을 통과해 헤드부의 상부로 개방되며, 외부로부터 주입된 본시멘트를 받아 들이는 내부통로가 형성되어 있고, 상기 골부에는, 상기 내부통로로 주입된 본시멘트를 척추체삽입부의 주변 방향으로 배출하는 다수의 유출구멍이 형성되어 있는 기본 구성을 갖는다.In the pedicle screw of the present invention, the screw itself not only provides a bonding force, but also serves as an introduction tube for introducing the bone cement. It is possible to inject bone cement into the vertebral body under the triceps through the pedicle screw as a connecting passage. The pedicle screw provides a fixing force to the vertebral body in a state of being screwed to the patient's vertebral body, has a partial sphere shape, includes a head part having a wrench groove open upward, and integrally with the head part The vertebral body insert is screwed into the vertebral body, and the head part and the vertebral body insert part are opened to the upper part of the head part through a wrench groove, and the bone injected from the outside is An internal passage for receiving cement is formed, and the bone part has a basic configuration in which a plurality of outlet holes for discharging the cement injected through the internal passage in a peripheral direction of the vertebral body insertion unit are formed.

또한 본 발명의 척추 고정술용 수술도구는, 환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서, 부분 구(球)의 형태를 취하며, 상부로 개방된 렌치홈을 갖는 헤드부와, 상기 헤드부에 일체를 이루고 외주면에 나선형 산부와 골부가 형성되며, 척추체 내에 나사 결합되는 척추체삽입부를 포함하고, 상기 헤드부와 척추체삽입부의 내부에는, 렌치홈을 통과해 헤드부의 상부로 개방되며, 외부로부터 주입된 본시멘트를 받아 들이는 내부통로가 형성되어 있고, 상기 골부에는, 상기 내부통로로 주입된 본시멘트를 척추체삽입부의 주변 방향으로 배출하는 다수의 유출구멍이 형성되어 있는 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 연장지지부를 갖는 개방하우징과; 상기 개방하우징에 장착되며 본시멘트를 상기 척추경 나사못의 내부통로로 압입하는 본시멘트주입기를 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 takes the form of a partial sphere, and includes a head part having a wrench groove open upward; It is integral with the head part and has a spiral peak and a valley part formed on the outer circumferential surface, and includes a vertebral body insertion part screwed into the vertebral body, and the inside of the head part and the vertebral body insertion part is opened to the upper part of the head part through a wrench groove, A pedicle screw having an internal passage for receiving the bone cement injected from the outside and having a plurality of outlet holes formed in the bone part to discharge the bone cement injected through the internal passage in the peripheral direction of the vertebral body insertion unit; ; 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 an open housing having a pair of extended support parts extending in a straight line parallel to each other and providing a space therebetween; and a bone cement injector mounted on the open housing and press-fitting the bone cement into the inner passage of the pedicle screw.

도 1은 본 발명의 일 실시예에 따른 척추고정술용 수술도구(10)의 사시도이고, 도 2는 수술도구의 분해 사시도이다. 또한, 도 3은 척추고정술용 수술도구의 내부 구조를 설명하기 위한 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 an exploded perspective view of the surgical tool. In addition, Figure 3 is a cross-sectional view for explaining the internal structure of the surgical tool for spinal fixation.

도시한 바와 같이, 본 실시예에 따른 척추고정술용 수술도구(10)는, 척추경 나사못(40), 개방하우징(20), 인너캡(30), 본시멘트주입기(도 4의 50)를 포함한다.As shown, the surgical tool 10 for spinal fixation according to the present embodiment includes a pedicle screw 40, an open housing 20, an inner cap 30, and a bone cement injector (50 in FIG. 4). do.

척추경 나사못(40)은, 티타늄이나 스테인리스스틸이나 코발트크롬 중 어느 하나를 원소재로 하여 3D 프린팅 방식을 통해 제작된 것으로서, 도 6에 도시한 바와 같이, 척추체(100)의 내부에 박혀 고정된 상태로 척추체에 고정력을 제공한다. 척추경 나사못(40) 자체가 일체를 이룸은 물론이다.The pedicle screw 40 is manufactured through a 3D printing method using either titanium, stainless steel, or cobalt chromium as a raw material, and is embedded and fixed inside the vertebral body 100 as shown in FIG. 6 . It provides a fixation force to the vertebral body. Of course, the pedicle screw 40 itself is integral.

척추경 나사못(40)은, 헤드부(41)와 척추체삽입부(43)를 포함한다.The pedicle screw 40 includes a head portion 41 and a vertebral body insertion portion 43 .

헤드부(41)는, 상단부가 평평한 부분 구(球)의 형태를 취하고 상부로 개방된 렌치홈(41a)을 갖는다. 렌치홈(41a)은 육각홈으로서 육각렌치가 끼워진다. 육각렌치를 이용해 척추경 나사못(40)을 죄거나 풀 수 있는 것이다.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 hexagon groove into which a hexagon wrench is inserted. It is possible to tighten or loosen the pedicle screw 40 using a hexagonal wrench.

척추체삽입부(43)는, 척추체(100)의 내부에 완전히 삽입되는 부분으로서, 외주면에 산부(43a)와 골부(43d)를 갖는다. 이러한 산부(43a)와 골부(43d)는 일반적인 스크류와 같다.The vertebral body insertion unit 43 is a portion completely inserted into the vertebral body 100 , and has an apex 43a and a trough 43d on its outer circumferential surface. These peaks (43a) and valleys (43d) are the same as a general screw.

또한, 척추체삽입부(43)는, 제1나사부(40A)와 제2나사부(40B)를 포함하여 구성된다. 제1나사부(40A)에 포함되는 산부(43a)의 피치는 제2나사부(40B)의 산부(43a)의 피치보다 좁다. 피치가 좁다는 의미는 피치 사이의 골부(43d)의 폭이 좁다는 의미이다.In addition, the vertebral body insertion portion 43 is configured to include a first screw portion 40A and a second screw portion 40B. The pitch of the peaks 43a included in the first screw portion 40A is narrower than the pitch of the peaks 43a of the second screw portion 40B. The narrow pitch means that the width of the valleys 43d between the pitches is narrow.

아울러, 제1나사부(40A)의 골부에는 다수의 미세유출구멍(43b)이, 제2나사부(40B)의 골부에는 다수의 메인유출구멍(43c)이 형성된다. 미세유출구멍(43b)과 메인유출구멍(43c)은, 후술할 내부통로(43e)를 반지름 방향으로 개방하는 통로이다. In addition, a plurality of fine outlet holes 43b are formed in the valley of the first screw portion 40A, and a plurality of main outlet holes 43c are formed in the valley of the second screw portion 40B. The fine outlet hole 43b and the main outlet hole 43c are passages for radially opening an inner passage 43e to be described later.

메인유출구멍(43c)의 내경은 미세유출구멍(43b)의 내경보다 당연히 크다. 메인유출구멍(43c)의 내경은 미세유출구멍(43b) 직경의 10배 내지 20배 정도 일 수 있다. 대부분의 본시멘트는 메인유출구멍(43c)을 통해 배출된다. The inner diameter of the main outlet hole (43c) is naturally larger than the inner diameter of the fine outlet hole (43b). The inner diameter of the main outlet hole 43c may be about 10 to 20 times the diameter of the micro outlet hole 43b. Most of the bone cement is discharged through the main outlet hole (43c).

필요에 따라 제1나사부(40A)의 골부의 표면은 꺼끌꺼끌하게 형성할 수 있다. 척추경 나사못(40)이 3D 프린팅 방식으로 제작되므로, 표면의 조도는 조절하는 일은 어려운 일이 아니다. 여하튼, 제1나사부(40A)의 표면을 거칠게 형성함으로써 주변 뼈조직과의 유착을 보다 적극적으로 도모할 수 있다.If necessary, the surface of the valley portion of the first screw portion 40A may be formed to be smooth. Since the pedicle screw 40 is manufactured by 3D printing, it is not difficult to adjust the roughness of the surface. Anyway, by roughing the surface of the first screw portion 40A, it is possible to more actively promote adhesion with the surrounding bone tissue.

척추경 나사못(40)의 중심축부에는 내부통로(43e)가 형성되어 있다. 내부통로(43e)는 일정내경을 갖는 관통구멍으로서, 상단부는 렌치홈(41a)을 통해 상부로 개방되고, 하단부는 단부배출구(43f)를 통해 하부로 개방된다. 본 설명에서 상부는 헤드부(41)가 위치한 부분이고, 하단부는 제2나사부(40B)의 끝부분을 의미한다.An inner passage 43e is formed in the central axial portion of the pedicle screw 40 . The inner passage 43e is a through hole having a predetermined inner diameter, and the upper end is opened upward through the wrench groove 41a, and the lower end is opened downward through the end outlet 43f. In the present description, the upper part is a part where the head part 41 is located, and the lower part means the end part of the second screw part 40B.

내부통로(43e)는 본시멘트주입기(50)로부터 압입된 본시멘트(Bone cement)를 받아들이는 통로로서, 미세유출구멍(43b)과 메인유출구멍(43c)을 통해 측방향으로 개방된다. 본시멘트는 내부통로(43e)를 통해 이동하면서 미세유출구멍(43b)과 메인유출구멍(43c)을 통해 빠져나가고 나머지는 단부배출구(43f)로 빠지며 도 6에 도시한 바와 같이, 척추체삽입부(43)의 주변으로 퍼진다. 척추체삽입부(43)로부터 배출된 본시멘트는, 척추체의 뼈조직내부로 스며들며 빈공간을 채워 뼈의 결합력과 강도를 증가시킨다. The inner passage (43e) is a passage for receiving the bone cement press-inserted from the bone cement injector (50), and is opened laterally through the micro outlet hole (43b) and the main outlet hole (43c). As the cement moves through the inner passage 43e, it exits through the micro-outlet hole 43b and the main outlet 43c, and the rest falls through the end outlet 43f, as shown in FIG. 6, the vertebral body insert ( 43) spreads around. Bone cement discharged from the vertebral body insertion unit 43 permeates into the bone tissue of the vertebral body and fills the empty space to increase the bonding strength and strength of the bone.

상기 구성을 갖는 척추경 나사못(40)은, 도 2 및 도 3에 도시한 바와 같이, 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.As shown in FIGS. 2 and 3, the pedicle screw 40 having the above configuration is inserted into the space portion 20a of the open housing 20, and then the head portion 41 is inserted into the open housing 20. It descends until it is caught in the locking hole 23c of 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 다른 수술도구를 지지하는 역할을 한다. 개방하우징(20)의 일부, 즉 연장지지부(21)는 수술 후 절단되어 버려지고, 고정바디부(23)는 연결로드(도 6의 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 other surgical tools required 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. 6) 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, 척추체삽입부(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 6의 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 supporting the connecting rod (105 of FIG. 6) 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 휠 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 segmented groove 22 is, for example, a part cut when the extended support part 21 is bent 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 수술도구가 나사 결합하는 부분이다.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 where the inner cap 30 and the surgical tool are screwed together.

인너캡(30)은, 도 2에 도시한 바와 같이, 외주면에 수나사산(31e)이 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. 도면부호 31a는 렌치걸림홈이다.As shown in FIG. 2, the inner cap 30 is a ring-shaped member having a male thread 31e formed on the outer circumferential surface, and presses the pedicle screw 40 downward while being screwed to the female thread part 24. The pedicle screw 40 can be more stably fixed by using the inner cap 30 . Reference numeral 31a denotes a wrench locking groove.

도 4는 본 발명의 일 실시예에 따른 척추고정술용 수술도구(10)의 전체 사시도이다. 4 is an overall perspective view of the surgical tool 10 for spinal fixation according to an embodiment of the present invention.

도면을 참조하면, 개방하우징(20)에 본시멘트주입기(50)가 장착됨을 알 수 있다. 본시멘트 주입기(50)는, 주사기(55)로부터 공급된 본시멘트를 척추경 나사못(40)의 내부통로(43e)로 압입하는 것으로서, 이러한 기능을 수행할 수 있는 한, 주입기 자체의 구성은 얼마든지 달라질 수 있다.Referring to the drawings, it can be seen that the cement injector 50 is mounted on the open housing 20 . The bone cement injector 50 presses the bone cement supplied from the syringe 55 into the inner passage 43e of the pedicle screw 40, and as long as it can perform this function, how much is the configuration of the injector itself? anything can be different

도 4에서의 본시멘트 주입기(50)는, 회전실린더(51), 피스톤(53), 주사기(55)를 포함한다. The cement injector 50 in FIG. 4 includes a rotating cylinder 51 , a piston 53 , and a syringe 55 .

회전실린더(51)는 외주면에 수나사부(51a)가 형성되어 있는 중공형 케이스로서 개방하우징(20)에 대해 나사 결합한다. 회전실린더(51)의 배출구(미도시)가 척추경 나사못(40)의 내부통로(43e)에 연결됨은 물론이다. 피스톤(53)은 회전실린더(51)의 내부로 진입하며 회전실린더(51)에 주입되어 있는 본시멘트를 내부통로(43e)로 압출한다. The rotating cylinder 51 is a hollow case in which a male screw portion 51a is formed on an outer circumferential surface and is screwed to the open housing 20 . Of course, the outlet (not shown) of the rotary cylinder 51 is connected to the inner passage 43e of the pedicle screw 40 . The piston 53 enters the inside of the rotary cylinder 51 and extrudes the cement injected into the rotary cylinder 51 into the inner passage 43e.

도 5 및 도 6은 도 1에 도시한 척추 고정술용 수술도구의 사용 방법을 설명하기 위한 도면이다.5 and 6 are views for explaining a method of using the surgical tool for spinal fixation shown in FIG. 1 .

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

공간이 확보되면, 육각렌치(미도시)의 단부를 렌치홈(41a)에 끼운 상태로, 개방하우징(20)과 육각렌치를 함께 회전시켜, 척추경 나사못(40)이 척추체(100)의 목적지점에 도달하게 한다. When the space is secured, with the end of the hexagon wrench (not shown) inserted into the wrench groove 41a, the open housing 20 and the hexagon wrench are rotated together, so that the pedicle screw 40 is the purpose of the vertebral body 100 . to reach the point.

상기 과정을 통해 척추경 나사못(40)이 정위치 되었다면, 육각렌치를 빼내고 본시멘트 주입기(50)를 장착한 후, 척추체삽입부(43)로 본시멘트를 압입한다. 압입된 본시멘트는, 내부통로(43e)를 통과하며 메인유출구멍(43c)과 미세유출구멍(43b)을 통해 주변으로 배치되고 나머지는 단부배출구(43f)로 배출된다. 배출된 본시멘트(103)는 주변 뼈조직에 결합하여 뼈의 결합력과 강도를 상승시킨다. If the pedicle screw 40 has been properly positioned through the above process, the hexagonal wrench is removed, the bone cement injector 50 is mounted, and the bone cement is press-inserted through the vertebral body inserting unit 43 . The press-fitted cement passes through the inner passage (43e) and is disposed around the main outlet hole (43c) and the micro outlet hole (43b), and the rest is discharged through the end outlet (43f). The discharged bone cement 103 is coupled to the surrounding bone tissue to increase the bonding strength and strength of the bone.

본시멘트의 주입이 완료되었다면, 본시멘트 주입기(50)를 분리한 후 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.If the injection of the bone cement is complete, after separating the bone cement injector 50, the connection rod 105 is passed through the support groove 23a, and the connection rod 105 is pressed down using the rod fixing screw 107. do. 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.

상기 과정이 완료되었다면 연장지지부(21)를 꺽어 절단 한 후 수술을 마무리한다.If the above process is completed, the extended support part 21 is bent and cut, and then the operation is finished.

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 31a:렌치걸림홈
31e:수나사산 40:척추경 나사못 40A:제1나사부
40B:제2나사부 41:헤드부 41a:렌치홈
43:척추체삽입부 43a:산부 43b:미세유출구멍
43c:메인유출구멍 43d:골부 43e:내부통로
43f:단부배출구 50:본시멘트 주입기 51:회전실린더
51a:수나사부 53:피스톤 55:주사기
100:척추체 103:본시멘트 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 31a: wrench locking groove
31e: male thread 40: spinal screw 40A: first thread part
40B: second screw part 41: head part 41a: wrench groove
43: vertebral body insertion part 43a: obstetric part 43b: microoutlet hole
43c: main outlet hole 43d: valley 43e: internal passage
43f: End outlet 50: Bone cement injector 51: Rotating cylinder
51a: male thread part 53: piston 55: syringe
100: vertebral body 103: bone cement 105: connecting rod
107: rod fixing screw

Claims (10)

환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서,
부분 구(球)의 형태를 취하며, 상부로 개방된 렌치홈을 갖는 헤드부와,
상기 헤드부에 일체를 이루고 외주면에 나선형 산부와 골부가 형성되며, 척추체 내에 나사 결합되는 척추체삽입부를 포함하고,
상기 헤드부와 척추체삽입부의 내부에는, 렌치홈을 통과해 헤드부의 상부로 개방되며, 외부로부터 주입된 본시멘트를 받아 들이는 내부통로가 형성되어 있고,
상기 골부에는, 상기 내부통로로 주입된 본시멘트를 척추체삽입부의 주변 방향으로 배출하는 다수의 유출구멍이 형성되어 있는,
본시멘트 주입형 척추경 나사못.As providing a fixing force to the vertebral body in a state of being screwed to the patient's vertebral body,
A head part taking the form of a partial sphere and having a wrench groove open to the top;
It is integral with the head part and has a helical ridge and a trough formed on the outer circumferential surface, and includes a vertebral body insertion part screwed into the vertebral body,
In the inside of the head part and the vertebral body insertion part, it passes through the wrench groove and is opened to the upper part of the head part, and an internal passage for receiving the bone cement injected from the outside is formed,
A plurality of outlet holes for discharging the bone cement injected into the inner passage in the peripheral direction of the vertebral body insertion unit are formed in the bone portion,
Bone cement injection type pedicle screws. 제1항에 있어서,
상기 내부통로는;
상기 헤드부와 척추체삽입부의 중심축부에 형성되며, 일정 내경을 가지고 척추체삽입부의 길이방향으로 개방된,
본시멘트 주입형 척추경 나사못.According to claim 1,
the inner passage;
It is formed in the central axial portion of the head portion and the vertebral body insertion unit, has a predetermined inner diameter and is opened in the longitudinal direction of the vertebral body insertion unit,
Bone cement injection type pedicle screws. 제1항에 있어서,
상기 척추체삽입부는;
상대적으로 작은 피치의 산부가 위치하는 제1나사부와, 상기 제1나사부에 포함된 산부보다 큰 피치를 갖는 제2나사부를 포함하고,
상기 유출구멍은;
제2나사부의 골부를 따라 형성된 다수의 메인유출구멍과, 제1나사부의 골부를 따라 형성된 다수의 미세유출구멍인,
본시멘트 주입형 척추경 나사못.According to claim 1,
The vertebral body insertion unit;
Comprising a first screw portion in which the peaks having a relatively small pitch are located, and a second screw portion having a larger pitch than the peaks included in the first screw portion,
The outlet hole;
A plurality of main outlet holes formed along the valleys of the second screw portion and a plurality of fine outlet holes formed along the valleys of the first screw portion,
Bone cement injection type pedicle screws. 제3항에 있어서,
상기 메인유출구멍의 내경은, 산부 피치의 1/3 내지 2/3인,
본시멘트 주입형 척추경 나사못.4. The method of claim 3,
The inner diameter of the main outlet hole is 1/3 to 2/3 of the peak pitch,
Bone cement injection type pedicle screws. 제1항에 있어서,
상기 척추경 나사못은,
티타늄이나 스테인리스스틸이나 코발트크롬 중 어느 하나를 원소재로 하여 3D 프린팅 방식을 통해 제작된,
본시멘트 주입형 척추경 나사못.According to claim 1,
The pedicle screw,
Manufactured through 3D printing using either titanium, stainless steel, or cobalt chromium as a raw material,
Bone cement injection type pedicle screws. 환자의 척추체에 나사 결합한 상태로 척추체에 고정력을 제공하는 것으로서, 부분 구(球)의 형태를 취하며, 상부로 개방된 렌치홈을 갖는 헤드부와, 상기 헤드부에 일체를 이루고 외주면에 나선형 산부와 골부가 형성되며, 척추체 내에 나사 결합되는 척추체삽입부를 포함하고, 상기 헤드부와 척추체삽입부의 내부에는, 렌치홈을 통과해 헤드부의 상부로 개방되며, 외부로부터 주입된 본시멘트를 받아 들이는 내부통로가 형성되어 있고, 상기 골부에는, 상기 내부통로로 주입된 본시멘트를 척추체삽입부의 주변 방향으로 배출하는 다수의 유출구멍이 형성되어 있는 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 연장지지부를 갖는 개방하우징과;
상기 개방하우징에 장착되며 본시멘트를 상기 척추경 나사못의 내부통로로 압입하는 본시멘트주입기를 포함하는,
척추고정술용 수술도구.This is to provide 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 partial sphere and includes a head part having a wrench groove open upward, and a helical mountain part integrally with the head part and on the outer circumferential surface and a bone portion is formed, and includes a vertebral body insert screwed into the vertebral body, and the inside of the head part and the vertebral body insert part is opened to the upper part of the head part through the wrench groove, and receives the bone cement injected from the outside. a pedicle screw in which a passage is formed and a plurality of outlet holes for discharging the bone cement injected into the internal passage in a peripheral direction of the vertebral body insertion portion are formed in the bone 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 an open housing having a pair of extended support parts extending in a straight line parallel to each other and providing a space therebetween;
Comprising a bone cement injector mounted on the open housing and press-fitting the bone cement into the inner passage of the pedicle screw,
Surgical instruments for spinal fixation. 제6항에 있어서,
상기 내부통로는;
상기 헤드부와 척추체삽입부의 중심축부에 형성되며, 일정 내경을 가지고 척추체삽입부의 길이방향으로 개방된,
척추고정술용 수술도구.7. The method of claim 6,
the inner passage;
It is formed in the central axial portion of the head portion and the vertebral body insertion unit, has a predetermined inner diameter and is opened in the longitudinal direction of the vertebral body insertion unit,
Surgical instruments for spinal fixation. 제6항에 있어서,
상기 척추체삽입부는;
상대적으로 작은 피치의 산부가 위치하는 제1나사부와, 상기 제1나사부에 포함된 산부보다 큰 피치를 갖는 제2나사부를 포함하고,
상기 유출구멍은;
제2나사부의 골부를 따라 형성된 다수의 메인유출구멍과, 제1나사부의 골부를 따라 형성된 다수의 미세유출구멍인,
척추고정술용 수술도구.7. The method of claim 6,
The vertebral body insertion unit;
Comprising a first screw portion in which the peaks having a relatively small pitch are located, and a second screw portion having a larger pitch than the peaks included in the first screw portion,
The outlet hole;
A plurality of main outlet holes formed along the valleys of the second screw part, and a plurality of fine outlet holes formed along the valleys of the first screw part,
Surgical instruments for spinal fixation. 제8항에 있어서,
상기 메인유출구멍의 내경은, 산부 피치의 1/3 내지 2/3인,
척추고정술용 수술도구.9. The method of claim 8,
The inner diameter of the main outlet hole is 1/3 to 2/3 of the peak pitch,
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 3D printing using either titanium, stainless steel, or cobalt chromium as a raw material,
Surgical instruments for spinal fixation.
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KR20200064601A (en) 2018-11-29 2020-06-08 부산대학교 산학협력단 Spinal screw that improves the pull out force
JP2020523061A (en) * 2017-06-07 2020-08-06 ウォーソー・オーソペディック・インコーポレーテッド Spinal implant system and method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10211213A (en) * 1997-01-31 1998-08-11 Mitsubishi Materials Corp Screw for bone joint
KR100994184B1 (en) 2008-02-05 2010-11-15 주식회사 네온메디칼 A spinal screw module
KR100895243B1 (en) 2008-02-27 2009-04-30 최길운 Buffered spine screw
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