KR101178488B1 - Apparatus for bone fixation - Google Patents

Apparatus for bone fixation Download PDF

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Publication number
KR101178488B1
KR101178488B1 KR1020110026328A KR20110026328A KR101178488B1 KR 101178488 B1 KR101178488 B1 KR 101178488B1 KR 1020110026328 A KR1020110026328 A KR 1020110026328A KR 20110026328 A KR20110026328 A KR 20110026328A KR 101178488 B1 KR101178488 B1 KR 101178488B1
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KR
South Korea
Prior art keywords
washer
lock hole
plate
bone
screw
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KR1020110026328A
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Korean (ko)
Inventor
김서곤
김일
임동수
전창수
엄광진
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주식회사 솔고 바이오메디칼
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Priority to KR1020110026328A priority Critical patent/KR101178488B1/en
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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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
    • A61B17/8047—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers wherein the additional element surrounds the screw head in the plate hole
    • 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
    • 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
    • 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • 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
    • 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
    • A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread

Abstract

PURPOSE: An apparatus for bone fixation is provided to prevent blood supply from reducing by coupling the screw with the plate and forming a small contact area between bones. CONSTITUTION: A screw(10) has a head unit(12) in which a male screw thread(13) is formed on an outer circumference. A female screw thread(22) engaged with the male screw thread is formed in a washer(20). A locking hole(31) is formed on a plate(30) for the washer to be inserted after being mounted. The end tip of a protrusion portion(21) is pointedly formed.

Description

뼈고정용 장치{Apparatus for bone fixation}Apparatus for bone fixation

본 발명은 골절된 뼈를 접합시키기 위한 뼈고정용 장치에 관한 것으로, 더욱 상세하게는, 플레이트에서 스크류의 풀림으로 인한 빠짐(pull out)을 방지하며 플레이트와 뼈 사이의 접촉면적을 감소시킬 수 있도록 발명된 뼈고정용 장치에 관한 것이다.
The present invention relates to a device for bone fixation for joining fractured bone, and more particularly, to prevent pull out due to loosening of the screw in the plate and to reduce the contact area between the plate and the bone The invention relates to a device for bone fixation.

일반적인 골절 치료의 경우, 골절 환자의 연부조직을 절개한 후 골절된 뼈의 표면에 플레이트를 지지하고 스크류로 고정하여 치료하는 뼈고정용 장치가 사용된다.In the case of general fracture treatment, a bone fixation device is used, in which a soft tissue of a fracture patient is incised and then a plate is supported on the surface of the fractured bone and fixed with a screw.

이러한 뼈고정용 장치는 플레이트에 홀을 가공하고 스크류를 삽입하는 구조가 일반적이다. Such a device for fixing bones is generally a structure for processing holes and inserting screws in the plate.

그러나, 이러한 종래의 뼈고정용 장치는 환자의 몸에 이식한 후 장기적으로 사용할 경우 외부 하중에 의하여 스크류 부위에 응력이 집중되어 스크류가 뼈와 플레이트 홀로부터 빠져 나오는 문제점이 발생하였다. 특히 골다공성의 환자의 경우는 재시술까지 해야 하는 등의 위험성이 있었다. However, such a conventional bone fixation device has a problem in that the stress is concentrated in the screw portion by the external load when long-term use after implantation into the patient's body, the screw is released from the bone and plate holes. In particular, in patients with osteoporosis, there was a risk of having to undergo a procedure again.

아울러, 플레이트와 뼈가 직접적으로 면접촉하게 되므로 그 사이에서 골막의 모세혈관망이 손상되고 피질골의 혈액공급이 상대적으로 저하되어 플레이트와 접촉하는 부분에서 골다공성의 변화를 증가시킬 수 있는 문제점이 있었다.In addition, since the plate and bone are in direct surface contact, the capillary network of the periosteum is damaged therebetween, and the blood supply of the cortical bone is relatively lowered, thereby increasing the change in osteoporosis at the portion in contact with the plate.

즉, 스크류와 플레이트의 접촉으로 인한 불안전 분쇄 골절과 같은 2차 골절이 유발될 수도 있는 문제가 있었다. 가령, 골다공증 환자의 경우 고정력 향상을 위해 분절된 뼈를 사이에 두고 두 개의 플레이트들로 고정해야되는 경우가 있었으나 이로 인해 뼈가 분쇄되는 문제점이 있었다. 그리고, 이러한 경우, 시술 시간이 길어지며 시술 편이성이 저하되고 환부에 좋지 않은 영향을 미칠 개연성이 컸다.
That is, there was a problem that a secondary fracture such as an unstable fracture fracture due to the contact between the screw and the plate may be caused. For example, in the case of osteoporosis patients, in order to improve fixation force, there are cases where the bones have to be fixed with two plates interposed therebetween, but this causes a problem in that the bones are crushed. And, in this case, the procedure time is long, the ease of procedure is lowered, and the probability of adversely affecting the affected part was large.

따라서, 본 발명은 스크류가 플레이트에 더욱 견고히 결속되고, 플레이트와 뼈 사이의 접촉면적을 최소한으로 감소시키며, 골다공증이 발생한 뼈에서도 (하나의 플레이트만 사용하도록) 더욱 안정적이며 고정력이 향상된 뼈고정용 장치를 제공하는 것에 주목적이 있다.
Accordingly, the present invention provides a device for bone fixation, wherein the screw is more firmly bound to the plate, the contact area between the plate and the bone is reduced to a minimum, and the bone fixation bone is more stable and the fixing force is improved (to use only one plate). The main purpose is to provide.

상기와 같은 목적을 달성하기 위한 본 발명은, 플레이트 및 뼈에 삽입되며 상기 플레이트에 고정되는 스크류를 포함하는 뼈고정용 장치에 있어서, 상측으로 외경이 증가하는 형상으로 외주면에 숫나사산이 형성된 헤드부를 구비하는 스크류;와 상기 헤드부가 안착되는 내주면에 상기 숫나사산과 치합하는 암나사산이 형성되는 와셔; 및 상기 와셔가 삽입 후 안착되는 잠금홀이 형성된 플레이트;를 포함하고, 잠금홀에 안착된 와셔는 헤드부의 나사결합에 따라 탄성적으로 외경이 확장되어 잠금홀에 밀착되고 하단에는 잠금홀에서 돌출되도록 연장부가 형성된다.The present invention for achieving the above object, in the bone fixing device comprising a screw inserted into the plate and the bone is fixed to the plate, provided with a head portion formed with a male thread on the outer peripheral surface in the shape of increasing the outer diameter upward A washer formed with a female thread engaged with the male thread on an inner circumferential surface on which the head is seated; And a plate in which a lock hole is formed to be seated after the washer is inserted. The washer seated in the lock hole elastically expands its outer diameter according to the screwing of the head to be in close contact with the lock hole and protrude from the lock hole at the bottom thereof. An extension is formed.

상기 잠금홀의 상단에는 둘레를 따라 이탈방지부가 형성되되 상기 이탈방지부는 내경이 와셔의 외경보다 더 크게 형성되고, 잠금홀 내부에서 상기 와셔의 외경은 이탈방지부의 내경보다 더 크게 탄성적으로 확장된다.A separation prevention part is formed along the periphery of the lock hole, and the separation prevention part has an inner diameter larger than the outer diameter of the washer, and the outer diameter of the washer elastically expands larger than the inner diameter of the departure preventing part.

그리고, 상기 와셔의 외주면은 볼록하게 형성되고, 상기 잠금홀의 내주면은 오목하게 형성된다.The outer circumferential surface of the washer is convex, and the inner circumferential surface of the locking hole is concave.

상기 와셔에는 탄성 확장을 유도하도록 단절부가 형성되며, 상기 와셔의 외주면에는 돌기부가 형성되고 잠금홀의 내주면에는 와셔의 외경 확장에 따라 돌기부가 끼워지는 요홈이 형성된다.The washer is formed with a cutoff portion to induce elastic expansion, and a protrusion is formed on the outer circumferential surface of the washer, and a groove is formed on the inner circumferential surface of the lock hole to fit the protrusion according to the expansion of the outer diameter of the washer.

상기 돌기부는 끝단이 뾰족하게 형성되고, 상기 요홈은 "V" 자형 골(valley) 모양을 이루도록 형성된다.
The protrusion is formed with a sharp tip, and the groove is formed to form a "V" -valley shape.

상기와 같은 구성의 본 발명은 플레이트와 뼈 사이의 접촉면적을 최소화하여 모세혈관망 손상 및 피질골의 혈액공급 저하를 방지할 수 있는 효과가 있다.The present invention of the configuration as described above has the effect of minimizing the contact area between the plate and the bone to prevent capillary network damage and lowering the blood supply of the cortical bone.

아울러, 본 발명의 와셔는 단절부가 형성되어 직경이 용이하게 확장될 수 있으며, 플레이트의 상단에는 이탈방지부가 형성되고, 헤드부의 외주면과 잠금홀의 내주면에는 돌기부와 요홈이 각각 형성되어 스크류의 나사풀림을 방지하여 빠짐을 더욱 확실하게 억제할 수 있는 고정력 향상 효과가 있다.
In addition, the washer of the present invention is formed with a cutout portion can be easily expanded in diameter, the separation prevention portion is formed on the upper end of the plate, the protrusions and grooves are formed on the outer circumferential surface of the head and the inner circumferential surface of the locking hole, respectively, to loosen the screw There is an effect of improving the fixing force that can be prevented more reliably prevented from falling out.

도 1 은 본 발명의 바람직한 실시예에 따른 스크류와 와셔 및 플레이트가 결합되기 전의 모습을 도시한 분해사시도,
도 2 는 본 발명의 바람직한 실시예에 따른 스크류와 와셔 및 플레이트가 결합되기 전의 모습을 도시한 단면도,
도 3 은 본 발명의 바람직한 실시예에 따라 와셔가 플레이트에 결합된 모습을 도시한 단면도,
도 4 는 본 발명의 바람직한 실시예에 따라 플레이트에 결합된 와셔에 스크류가 결합된 모습을 도시한 단면도.1 is an exploded perspective view showing a state before the screw and the washer and plate according to the preferred embodiment of the present invention,
Figure 2 is a cross-sectional view showing a state before the screw and the washer and plate according to the preferred embodiment of the present invention,
3 is a cross-sectional view showing a washer coupled to the plate according to a preferred embodiment of the present invention;
Figure 4 is a cross-sectional view showing the screw coupled to the washer coupled to the plate according to a preferred embodiment of the present invention.

이하, 도면을 참조하여 본 발명의 바람직한 실시예에 따른 뼈고정용 장치를 더욱 상세히 설명한다.Hereinafter, a device for bone fixation according to a preferred embodiment of the present invention with reference to the drawings in more detail.

도 1 과 도 2 를 참조하면, 본 발명의 스크류(10)는, 상측으로 외경이 증가하는 테이퍼드(taped) 형상으로서 외주면에 숫나사산(13)이 형성된 헤드부(12)가 상측으로 형성되고, 상기 헤드부(12)의 아래로는 뼈에 삽입되는 나사부(11)가 형성된다. 상기 헤드부(12)의 상면에는 렌치(wrench)가 끼워질 수 있도록 렌치홈(14)이 형성된다.1 and 2, the screw 10 of the present invention has a tapered shape in which an outer diameter thereof is increased upward, and a head 12 having a male thread 13 formed on an outer circumferential surface thereof is formed upward. Under the head portion 12, a screw portion 11 is inserted into the bone. A wrench groove 14 is formed on the upper surface of the head part 12 so that a wrench may be inserted therein.

그리고, 상기 와셔(20)는 링(ring) 형상이되 내주면에는 헤드부(12)의 숫나사산(13)에 치합하도록 암나사산(22)이 형성되며 하측으로 내경이 감소되도록 형성된다. 아울러, 와셔(20)의 외주면에는 끝단이 뾰족한 (다수 개의 링형태로 분리된 또는 하나의 나사산으로 이뤄진) 돌기부(21)가 둘레를 따라 형성되며, 상기 와셔(20)가 플레이트(30)의 잠금홀(31)에 안착됐을 때, 하단이 플레이트(30) 아래로 돌출되도록 연장부(23)가 형성된다. 따라서, 상기 와셔(20)는 잠금홀(31)에 안착될 수 있도록 형성되되 연장부(23)가 형성된 부분은 잠금홀(31)의 아래부분을 통과할 수 있는 외경을 갖도록 형성된다. In addition, the washer 20 has a ring shape, but an internal thread 22 is formed on the inner circumferential surface thereof so as to be engaged with the male thread 13 of the head 12, and the inner diameter is reduced downward. In addition, on the outer circumferential surface of the washer 20 is formed a projection 21 having a pointed end (separated into a plurality of rings or made of one thread) along the circumference, and the washer 20 locks the plate 30. When seated in the hole 31, the extension 23 is formed so that the lower end protrudes below the plate 30. Thus, the washer 20 is formed to be seated in the lock hole 31, the portion formed with the extension 23 is formed to have an outer diameter that can pass through the lower portion of the lock hole (31).

또한, 상기 와셔(20)는 나사결합에 따른 헤드부(12)의 하강에 따라 외경이 탄성적으로 팽창되되, 더 효율적인 직경의 탄성 팽창 및 축소를 유도하도록 (도 1 에 도시된 바와 같이) 일부분이 절개되어 일측에는 단절부(24)이 형성된다. In addition, the washer 20 is partially expanded (as shown in Figure 1) to induce an elastic expansion and contraction of the outer diameter is elastically expanded as the head portion 12 is lowered due to the screw coupling, more efficient The cut-out portion 24 is formed on one side.

한편, 상기 플레이트(30)에는 와셔(20)가 삽입되어 안착될 수 있도록 잠금홀(31)이 형성되되, 상기 잠금홀(31)은 와셔(20)가 안착될 수 있도록 항아리와 유사한 오목한 형상으로 형성되며 내주면에는 와셔(20)가 탄성적으로 외경이 확장되었을 때 돌기부(21)가 삽입되거나 치합될 수 있도록 "V" 자형의 골 모양을 이루는 요홈(32)이 형성된다.Meanwhile, a lock hole 31 is formed in the plate 30 so that the washer 20 can be inserted and seated. The lock hole 31 has a concave shape similar to a jar so that the washer 20 can be seated. The inner circumferential surface is formed in the groove 32 forming the bone shape of the "V" shape so that the protrusion 21 is inserted or engaged when the washer 20 is elastically expanded outside diameter.

그리고, 상기 잠금홀(31)이 상단에는 탄성확장된 와셔(20)의 회전을 방지하도록 걸림용 턱으로서 이탈방지부(33)가 형성된다. 따라서, 상기 이탈방지부(33)는 내경이 와셔(20)의 외경보다 더 크게 형성되나, 잠금홀(31) 내에서 최대로 확장된 와셔(20)는 이탈방지부(33)의 내경보다 외경이 더 크게 확장된다. 즉, 도 2 에 도시된 바와 같이, 이탈방지부(33)의 내경(D1)은 와셔(20)의 최대 외경(D2) 및 잠금홀의 최대 내경(D3, 도 4 참조) 보다 작다.In addition, the lock hole 31 is formed at the top of the separation prevention portion 33 as a locking jaw to prevent rotation of the elastically extended washer 20. Therefore, the departure preventing part 33 has an inner diameter larger than the outer diameter of the washer 20, but the washer 20, which is maximized in the lock hole 31, is larger than the inner diameter of the departure preventing part 33. This expands even more. That is, as shown in Figure 2, the inner diameter (D1) of the departure prevention portion 33 is smaller than the maximum outer diameter (D2) of the washer 20 and the maximum inner diameter (D3, see Fig. 4) of the lock hole.

상기와 같이 구성된 본 발명의 뼈고정용 장치는 도 3 내지 4 에 도시된 바와 같이 결합된다.The device for bone fixation of the present invention configured as described above is coupled as shown in FIGS.

도 3 를 참조하면, 분절된 뼈에 플레이트(30)를 밀착하기 전에 플레이트(30)의 잠금홀(31)에는 와셔(20)가 삽입된다. 이때, 와셔(20)는 단절부(24)가 형성되어 있으므로 (시술자가 손으로 오므림으로써) 탄성적으로 직경이 축소되어 이탈방지부(33)를 통과하여 잠금홀(31)에 안착될 수 있다. 그리고, 잠금홀(31)에 삽입된 와셔(20)는 직경이 다시 탄성복원하여 잠금홀(31) 내에서 구속된다.Referring to FIG. 3, the washer 20 is inserted into the locking hole 31 of the plate 30 before the plate 30 is closely attached to the segmented bone. At this time, since the washer 20 has a cutout portion 24 formed therein, the diameter of the washer 20 may be elastically reduced (by the operator picking it up by hand) to pass through the separation preventing portion 33 and be seated in the lock hole 31. have. Then, the washer 20 inserted into the lock hole 31 is restored in the lock hole 31 to restore the diameter again.

(시술자가 시술부위에 와셔의 연장부 끝단을 밀착한 상태에서) 렌치(미도시)를 이용해 스크류(10)를 와셔(20) 중앙에서 뼈로 삽입하면, 도 4 에 도시된 바와 같이, 스크류(10)의 헤드부(12)는 와셔(20)로 진입하게 된다. 상기 헤드부(12)의 진입에 따라, 헤드부(20)의 숫나사산(13)은 와셔(20)의 암나사산(22)과 치합하게 된다. 이때, 와셔(20)의 돌기부(21)는 요홈(32)에 부분적으로 끼워진 상태이므로, 와셔(20)와 플레이트(30) 사이의 마찰력에 의해 스크류(10)의 회전에 따라 와셔(20)의 직경은 잠금홀(31) 내에서 최대한으로 확장된다. When the screw 10 is inserted into the bone at the center of the washer 20 using a wrench (not shown) (in a state in which the operator is in close contact with the extension end of the washer at the surgical site), as shown in FIG. 4, the screw 10 The head portion 12 of) will enter the washer 20. As the head 12 enters, the male thread 13 of the head 20 is engaged with the female thread 22 of the washer 20. At this time, since the protrusion 21 of the washer 20 is partially fitted into the groove 32, the washer 20 is rotated according to the rotation of the screw 10 by the friction force between the washer 20 and the plate 30. The diameter is maximally expanded in the lock hole 31.

즉, 스크류(10)의 하강에 따라 잠금홀(31)에 안착된 와셔(20)는 일부분이 잠금홀(30) 내에서 맞닿은 상태이므로 와셔(20)와 플레이트(30) 사이에는 마찰력이 발생되되 상기 마찰력은 점차적으로 증가한다. 이때, 스크류(10)는 계속하여 하강하되, 전술한 바와 같이, 헤드부(12)는 상측으로 외경이 증가하는 테이퍼드 형상이므로, 스크류(10)의 하강에 따라 와셔(20)의 외경은 점차적으로 확장되며 와셔(20)와 플레이트(30) 사이의 마찰면적은 점차적으로 증가하게 되고, 와셔(20)의 직경은 서서히 팽창한다. That is, the washer 20 seated in the lock hole 31 as the screw 10 is lowered, so that a portion of the washer abuts in the lock hole 30, the friction force is generated between the washer 20 and the plate 30. The friction force gradually increases. At this time, the screw 10 continues to descend, but as described above, since the head portion 12 has a tapered shape whose outer diameter increases upward, the outer diameter of the washer 20 gradually decreases as the screw 10 descends. The friction area between the washer 20 and the plate 30 gradually increases, and the diameter of the washer 20 gradually expands.

따라서, 스크류(10)와 와셔(20) 및 플레이트(30)는 (종래와 대비하여) 더 큰 토크 상태로 조여지며, 와셔(20)의 직경 확장에 따라 돌기부(21)와 요홈(32)은 더욱 견고하게 치합되고 와셔(20)의 상단에는 이탈방지부(30)가 위치하게 되므로 스크류(10)의 회전현상 및 이로 인한 풀아웃현상은 최대한 억제된다.Accordingly, the screw 10, the washer 20 and the plate 30 are tightened to a larger torque state (as compared to the conventional), and as the diameter of the washer 20 extends, the protrusion 21 and the groove 32 are Since it is more firmly engaged and the separation prevention part 30 is located at the top of the washer 20, the rotation phenomenon of the screw 10 and the pull-out phenomenon due to this are suppressed as much as possible.

한편, 와셔(20)의 하단에 형성된 연장부(23)는 플레이트 아래로 돌출됨으로서 플레이트(30)와 뼈 사이를 이격시킨다. 따라서, 시술되는 뼈는 플레이트(30)와 면접촉하지 않고 연장부(23)의 끝단에 밀착하게 된다.On the other hand, the extension 23 formed on the lower end of the washer 20 is projected under the plate to space between the plate 30 and the bone. Accordingly, the bone to be treated is in close contact with the end of the extension 23 without being in surface contact with the plate 30.

참고적으로, 상기 돌기부(21)와 요홈(32)은 디자인에 따라서 숫나사산과 암나사산이 치합하는 형태로 실시되거나, 또는 둘레를 따라 링 형상의 돌기들이 다수개가 적층된 형상으로 실시될 수 있다. For reference, the protrusions 21 and the grooves 32 may be implemented in a form in which male and female threads are engaged with each other, or a plurality of ring-shaped protrusions are stacked along a circumference.

이상과 같이 본 명세서와 도면에 개시된 실시예들은 본 발명의 이해를 돕기 위해 특정 예를 제시한 것에 지나지 않으며, 본 발명의 범위를 제한하고자 하는 것은 아니다. 여기에 개시된 실시예들 이외에도 본 발명의 기술적 사상에 바탕을 둔 다른 변형예들이 실시 가능하다는 것은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 자명한 것이다.
As described above, the embodiments disclosed in the present specification and drawings are only illustrative of specific examples in order to facilitate understanding of the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10 : 스크류
11 : 나사부
12 : 헤드부
13 : 숫나사산
20 : 와셔
21 : 돌기부
22 : 암나사산
23 : 연장부
30 : 플레이트
31 : 잠금홀
32 : 요홈10: screw
11: screw thread
12:
13: male thread
20: washer
21: projection
22: female thread
23: extension part
30: plate
31: locking hole
32: groove

Claims (5)

플레이트 및 뼈에 삽입되며 상기 플레이트에 고정되는 스크류를 포함하는 뼈고정용 장치에 있어서,
상측으로 외경이 증가하는 형상으로 외주면에 숫나사산이 형성된 헤드부를 구비하는 스크류;와
상기 헤드부가 안착되는 내주면에 숫나사산과 치합하는 암나사산이 형성된 와셔; 및
상기 와셔가 삽입 후 안착되는 잠금홀이 형성된 플레이트;를 포함하고,
상기 와셔는 직경이 탄성적으로 가변되어 잠금홀에 안착될 수 있도록 단절부가 형성되며 헤드부의 나사결합에 따라 외경이 확장되어 잠금홀에 밀착되되, 하단에는 잠금홀에서 돌출되도록 연장부가 형성된 것을 특징으로 하는 뼈고정용 장치.
In the bone fixing device comprising a plate and a screw inserted into the bone fixed to the plate,
Screw having a head portion formed with a male thread on the outer peripheral surface in a shape of increasing the outer diameter to the upper side; And
A washer having a female thread that engages with a male thread on an inner circumferential surface of the head portion; And
And a plate in which a lock hole for seating the washer is inserted after insertion.
The washer is elastically variable in diameter so that the cutout is formed so that it can be seated in the lock hole, the outer diameter is expanded close to the lock hole according to the screw coupling of the head portion, the lower end is characterized in that the extension is formed to protrude from the lock hole Device for bone fixation.
제 1 항에 있어서, 상기 잠금홀의 상단에는 둘레를 따라 이탈방지부가 형성되되 상기 이탈방지부는 내경이 와셔의 외경보다 더 크게 형성되고, 잠금홀 내부에서 상기 와셔의 외경은 이탈방지부의 내경보다 더 크게 탄성적으로 확장되는 것을 특징으로 하는 뼈고정용 장치.
According to claim 1, wherein the upper end of the lock hole is formed in the separation prevention portion along the periphery of the separation prevention portion is formed larger than the outer diameter of the washer, the outer diameter of the washer in the lock hole is larger than the inner diameter of the separation prevention portion. Bone fixation device, characterized in that the elastic expansion.
제 2 항에 있어서, 상기 와셔의 외주면은 볼록하게 형성되고, 상기 잠금홀의 내주면은 오목하게 형성되는 것을 특징으로 하는 뼈고정용 장치.
The device of claim 2, wherein the outer circumferential surface of the washer is convex, and the inner circumferential surface of the locking hole is concave.
제 1 항 내지 제 3 항 중 어느 한 항에 있어서, 상기 와셔의 외주면에는 돌기부가 형성되고 잠금홀의 내주면에는 와셔의 외경 확장에 따라 돌기부가 끼워지는 요홈이 형성된 것을 특징으로 하는 뼈고정용 장치.
The device for bone fixation according to any one of claims 1 to 3, wherein a protrusion is formed on an outer circumferential surface of the washer, and a groove is formed on an inner circumferential surface of the lock hole, in which a protrusion is fitted according to the expansion of the outer diameter of the washer.
제 4 항에 있어서, 상기 돌기부는 끝단이 뾰족하게 형성되고, 상기 요홈은 "V" 자형 골 모양을 이루도록 형성되는 것을 특징으로 하는 뼈고정용 장치.
The device of claim 4, wherein the protrusion has a sharp tip, and the groove is formed to have a "V" -shaped bone shape.
KR1020110026328A 2011-03-24 2011-03-24 Apparatus for bone fixation KR101178488B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101989351B1 (en) * 2018-04-16 2019-06-14 (주)오스테오닉 Maxillary Skeletal Expander having movable screw guide
WO2021201351A1 (en) * 2020-04-03 2021-10-07 주식회사 모레컴퍼니 Bone anchoring device

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US20090157121A1 (en) 2007-12-13 2009-06-18 Harris Peter M Dynamic anterior vertebral plate
KR100949352B1 (en) 2001-10-23 2010-03-26 비이더만 모테크 게엠베하 ＆ 코. 카게 Bone Fixing Device
KR101007345B1 (en) 2010-11-12 2011-01-13 메디소스플러스(주) Cervical plating system

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US20090157121A1 (en) 2007-12-13 2009-06-18 Harris Peter M Dynamic anterior vertebral plate
KR101007345B1 (en) 2010-11-12 2011-01-13 메디소스플러스(주) Cervical plating system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101989351B1 (en) * 2018-04-16 2019-06-14 (주)오스테오닉 Maxillary Skeletal Expander having movable screw guide
WO2021201351A1 (en) * 2020-04-03 2021-10-07 주식회사 모레컴퍼니 Bone anchoring device

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