TWI528954B - Dynamic external fixation device - Google Patents
Dynamic external fixation device Download PDFInfo
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- TWI528954B TWI528954B TW102143978A TW102143978A TWI528954B TW I528954 B TWI528954 B TW I528954B TW 102143978 A TW102143978 A TW 102143978A TW 102143978 A TW102143978 A TW 102143978A TW I528954 B TWI528954 B TW I528954B
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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
- A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
- A61B17/64—Devices extending alongside the bones to be positioned
- A61B17/6425—Devices extending alongside the bones to be positioned specially adapted to be fitted across a bone joint
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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
- A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
- A61B17/64—Devices extending alongside the bones to be positioned
- A61B17/6441—Bilateral fixators, i.e. with both ends of pins or wires clamped
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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
- A61B2017/564—Methods for bone or joint treatment
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Description
本發明是應用於骨折治療領域,特別是關於一種可以提供一穩定之固定且持續釋放一大小穩定之撐開作用張力,維持骨頭固定處的關節內空間以及提供該關節活動的角度,得預防因長時間固定不動之關節攣縮的輔助器材。 The invention is applied to the field of fracture treatment, in particular to a method for providing a stable fixed and sustained release of a stable opening tension, maintaining an intra-articular space at a bone fixation site and providing an angle of the joint movement. Auxiliary equipment for long-term fixation of fixed joint contracture.
對於骨折的患者而言,其治療方法主要是以外力先將骨折處復歸正常位置,然後施以固定裝置,經過一段時間後讓患部自行癒合。由於治療時間並非短暫,若固定方式不當,將嚴重妨礙患者的日常活動。因此,如何有效固定骨折患部乃為相當重要的研究課題。 For patients with fractures, the main treatment method is to return the fracture to the normal position by external force, and then apply the fixation device, and let the affected part heal itself after a period of time. Because the treatment time is not short-lived, if the fixation is improper, it will seriously hinder the patient's daily activities. Therefore, how to effectively fix the affected part of the fracture is a very important research topic.
針對骨折患部而言,一般外固定裝置無法提供動態活動所需之活動度,僅能提供固定之支撐。因此,若骨折部包含關節時,不僅影響日常生活甚鉅,而且無法維持關節內之空隙,日後痊癒後會有關節攣縮之現象,患者需再進行復健治療,重建關節活動角度。 For fractured parts, the general external fixation device does not provide the activity required for dynamic activities and can only provide a fixed support. Therefore, if the fracture part contains joints, it not only affects the daily life, but also can not maintain the gaps in the joints. In the future, there will be joint contracture after the recovery. The patient needs to undergo rehabilitation treatment to reconstruct the joint activity angle.
習知技術如我國M256157的「手肘關節之調節裝置」,其主要包括有二個緊配合結構、二個容置結構、一第一樞接結構和一第二樞接 結構,該二個容置結構之一端分別配置於二個緊配合結構之一端上,該第一樞接結構之一端可與其一容置結構之另一相反端相互結合,該第二樞接結構之一端可與另一容置結構之另一相反端相互結合,且第二樞接結構之另一相反端可與第一樞接結構之另一相反端相互樞接。本習知技術可以提供手軸關節彎曲和伸展所需之活動角度,但結構設計複雜,使用不便,且因體積太大,並不利於用在掌指關節之骨折固定。 The conventional technology, such as the "arm adjustment device of the elbow joint" of the M256157 of China, mainly comprises two tight fitting structures, two accommodating structures, a first pivoting structure and a second pivoting connection. One end of the two receiving structures is respectively disposed on one end of the two tight fitting structures, and one end of the first pivoting structure can be coupled to another opposite end of a receiving structure thereof, the second pivoting structure One end may be coupled to the other opposite end of the other receiving structure, and the other opposite end of the second pivoting structure may be pivotally connected to the opposite end of the first pivoting structure. The prior art can provide the working angle required for bending and stretching of the hand joint, but the structural design is complicated, the use is inconvenient, and the volume is too large, which is not advantageous for the fracture fixation of the metacarpophalangeal joint.
另一習知技術如美國US 6,063,087的「Dynamic external fixation device」,是由第一、第二和一活動組件構成,第一和第二組件可以可透過固定針固定在骨頭上,活動組件連結第一和第二組件並可以提供角度之調整。本習知技術同樣可以提供手軸關節彎曲和伸展所需之活動角度,但問題同樣在於結構設計複雜,使用不便,且因體積太大,並不利於用在掌指關節之骨折固定。 Another conventional technique, such as the "Dynamic external fixation device" of US 6,063,087, is composed of first, second and a movable component, and the first and second components can be fixed to the bone through a fixed needle, and the movable component is connected. The first and second components can provide an adjustment of the angle. The prior art also provides the angle of motion required for bending and stretching of the hand shaft, but the problem is also that the structural design is complicated, inconvenient to use, and because of the large volume, it is not advantageous for the fracture fixation of the metacarpophalangeal joint.
又一習知技術如美國US 5,941,877的「Hand external fixation and joint mobilization and distraction device」,其包含兩個主要支撐組件,每個組件皆有一側邊可滑動調整之連接件,連接固定骨頭之鋼針,以及以可活動之球窩關節,以提供活動角度。本習知技術利用一球窩關節,提供外固定裝置一活動度,使患者在使用外固定時亦可兼具掌指關節之活動度,預防併發症,但同樣具有結構較為複雜,使用後造成患者生活不便的問題,且採取球窩關節並無法提供關節一持續穩定之張力。 A further prior art, such as the "Hand external fixation and joint mobilization and distraction device" of US 5,941,877, which comprises two main support components, each of which has a slidably adjustable connection on one side, and a steel needle for attaching the bone to the bone. , as well as movable ball and socket joints to provide an angle of activity. The prior art utilizes a ball and socket joint to provide an activity of the external fixation device, so that the patient can also have the mobility of the metacarpophalangeal joint when using the external fixation, and prevent complications, but also has a complicated structure and is caused by use. The problem of inconvenience to the patient, and the use of ball and socket joints does not provide a consistently stable tension of the joint.
顯然,前述各習知技術普遍的問題在於結構過於複雜,造成裝置上難以使用,以及增加患者活動負擔的問題,實有必要加以改進。 Obviously, the common problems of the aforementioned conventional techniques are that the structure is too complicated, it is difficult to use on the device, and the problem of increasing the workload of the patient is really necessary to be improved.
本案創作人有鑑於此,乃亟思加以改良創新,成功研發完成 本件動態外固定裝置,期能為骨折患者提供更為良善的患部固定裝置。 In view of this, the creators of this case have improved and innovated and successfully completed the research and development. This dynamic external fixation device can provide a better patient fixation device for fracture patients.
本發明的主要目的在於提供一種動態外固定裝置,其可以提供一穩定之支撐且持續釋放一大小穩定之撐開作用張力,不因該動態外固定裝置之變形量增加而劇烈改變,以維持施術區的關節內空間並同時兼具舒適感,並提供施術區的關節活動所需之角度,預防因長時間固定不動所造成之組織沾黏與關節攣縮。 The main object of the present invention is to provide a dynamic external fixation device which can provide a stable support and continuously release a stable opening tension, which is not changed drastically due to an increase in the deformation of the dynamic external fixation device to maintain the operation. The intra-articular space of the area is also comfortable, and provides the angle required for joint movement in the operation area to prevent tissue stickiness and joint contracture caused by long-term fixation.
本發明的另一目的在於提供一種動態外固定裝置,其結構簡單細小,可將外固定對患者之影響降至最低,維持日常生活之活動。 Another object of the present invention is to provide a dynamic external fixation device which is simple in structure and minimizes the influence of external fixation on a patient and maintains activities in daily life.
本發明的再一目的在於提供一種動態外固定裝置,其結構成型容易,手術簡單快速,可減少對患者手術時的不適感。 It is still another object of the present invention to provide a dynamic external fixation device which is easy to form and has a simple and rapid operation, and can reduce discomfort to the patient during surgery.
本發明實施例提供的一種動態外固定裝置,包括:一第一支架組、一第二支架組,以及至少一彈性件。 A dynamic external fixing device provided by the embodiment of the invention includes: a first bracket group, a second bracket group, and at least one elastic member.
該動態外固定裝置主要應用在掌指關節之骨折固定,其中,該第一支架組、該第二支架組分別固定在該關節兩端的骨頭上,並以一固定件穿設固定,在該第一支架組、該第二支架組之間連接該彈性件。 The dynamic external fixation device is mainly applied to the fracture fixation of the metacarpophalangeal joint, wherein the first stent group and the second stent group are respectively fixed on the bones at both ends of the joint, and are fixed by a fixing member. A resilient member is coupled between a bracket set and the second bracket set.
利用一具有良好彈性特性的彈性件,可以提供一穩定之固定且持續釋放一大小穩定之撐開作用張力,不因該動態外固定裝置之變形量增加而劇烈改變,以維持施術區的關節內空間並同時兼具舒適感。以及由該彈性件可樞轉的一端提供該關節活動所需之角度,預防因長時間固定不動所造成之組織沾黏與關節攣縮。 By using an elastic member having good elastic properties, it is possible to provide a stable fixed and sustained release of a stable opening tension, which is not changed drastically due to an increase in the deformation of the dynamic external fixation device, so as to maintain the intra-articular region of the operation region. Space and comfort at the same time. And the pivotable end of the elastic member provides the angle required for the joint to prevent tissue sticking and joint contracture caused by immobilization for a long time.
1‧‧‧第一支架組 1‧‧‧First stent set
11‧‧‧第一固定部 11‧‧‧First Fixed Department
12、22‧‧‧貫孔 12, 22‧‧‧through holes
2‧‧‧第二支架組 2‧‧‧Second bracket set
21‧‧‧第二固定部 21‧‧‧Second fixed department
3‧‧‧彈性件 3‧‧‧Flexible parts
31‧‧‧幾何形變區 31‧‧‧Geometric deformation zone
41‧‧‧樞接部 41‧‧‧ pivotal department
42‧‧‧樞轉部 42‧‧‧ pivoting department
5‧‧‧關節 5‧‧‧ joints
51、52‧‧‧骨頭 51, 52‧‧‧ bones
6‧‧‧固定件 6‧‧‧Fixed parts
10‧‧‧動態外固定裝置 10‧‧‧Dynamic external fixture
F‧‧‧作用張力 F‧‧‧action tension
S‧‧‧徑長 S‧‧‧ path length
第1圖為本發明的立體分解視圖;第2圖為本發明的立體組合視圖;第3圖為本發明的實施例圖;第4圖為本發明的另一實施例圖;第5圖為本發明的結構變化例圖;以及第6圖為本發明的動作流程圖。 1 is a perspective exploded view of the present invention; FIG. 2 is a perspective sectional view of the present invention; FIG. 3 is a view showing an embodiment of the present invention; FIG. 4 is a view showing another embodiment of the present invention; A structural change diagram of the present invention; and a sixth flowchart of the present invention.
為了使本發明的目的、技術方案和優點更加清楚,下面將結合附圖對本發明作進一步地詳細描述。 In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the present invention will be further described in detail with reference to the accompanying drawings.
如第1圖至第3圖所示,本發明所提供之一種動態外固定裝置10,主要包括有一第一支架組1、一第二支架組2,以及至少一彈性件3。該第一支架組1具有一第一固定部11,該第二支架組2具有一第二固定部21,該彈性件3兩端分別連接該該第一支架組1與該第二支架組2,該彈性件3具有至少一幾何形變區31,該幾何形變區31於該彈性件3延伸方向具有可調變的一徑長S。 As shown in FIG. 1 to FIG. 3, a dynamic external fixation device 10 according to the present invention mainly includes a first stent set 1, a second stent set 2, and at least one elastic member 3. The first bracket group 1 has a first fixing portion 11 , and the second bracket group 2 has a second fixing portion 21 . The two ends of the elastic member 3 are respectively connected to the first bracket group 1 and the second bracket group 2 . The elastic member 3 has at least one geometrically deformable region 31 having a variable length S in the direction in which the elastic member 3 extends.
該第一支架組1及該第二支架組2皆各為二對稱之金屬板體,其中該第一支架組1的該二金屬板體自該第一固定部11往外延伸具有一樞接部41,或由該第二支架組2的該二金屬板體自該第二固定部21往外延伸 該樞接部41,該彈性件3則具有一樞轉部42,該樞轉部42對應結合於該樞接部41。 The first bracket group 1 and the second bracket group 2 are each a two-symmetric metal plate body, wherein the two metal plate bodies of the first bracket group 1 extend outward from the first fixing portion 11 and have a pivoting portion. 41 or the second metal plate body of the second bracket group 2 extends outward from the second fixing portion 21 In the pivoting portion 41 , the elastic member 3 has a pivoting portion 42 , and the pivoting portion 42 is coupled to the pivoting portion 41 .
藉由上述完成的該動態外固定裝置10主要應用在掌指關節5之骨折固定。其中,該第一支架組1、該第二支架組2分別固定在該關節5兩端的骨頭51、52上,並在該第一支架組1、該第二支架組2之間連接該彈性件3。 The dynamic external fixation device 10 completed as described above is mainly applied to the fracture fixation of the metacarpophalangeal joint 5. The first bracket group 1 and the second bracket group 2 are respectively fixed on the bones 51 and 52 at the two ends of the joint 5, and the elastic member is connected between the first bracket group 1 and the second bracket group 2 3.
該彈性件3具有U形彎曲的該幾何形變區31,該幾何形變區31藉由朝該彈性件3延伸方向調變該徑長S,可以提供一穩定之固定且持續釋放一大小穩定之撐開作用張力F(第6圖),不因該動態外固定裝置10之變形量增加而劇烈改變,以維持施術區的關節5內空間並同時兼具舒適感。而該樞接部41、該樞轉部42提供該關節5活動所需之角度,預防因長時間固定不動所造成之組織沾黏與關節攣縮。 The elastic member 3 has a U-shaped curved deformation region 31, and the geometric deformation region 31 can adjust the diameter S by extending toward the extending direction of the elastic member 3, thereby providing a stable fixing and continuously releasing a stable size. The opening action tension F (Fig. 6) is not drastically changed by the increase in the amount of deformation of the dynamic external fixation device 10, so as to maintain the space inside the joint 5 of the operation zone and at the same time have a comfortable feeling. The pivoting portion 41 and the pivoting portion 42 provide the angle required for the joint 5 to move, preventing tissue stickiness and joint contracture caused by immobilization for a long time.
該第一固定部11及該第二固定部21各形成有至少一貫孔12、22,該貫孔12、22用以供一固定件6穿設,以將該第一支架組1、該第二支架組2固定在該骨頭51、52上,以得到足夠的固定力量。 Each of the first fixing portion 11 and the second fixing portion 21 is formed with at least a constant hole 12, 22 for a fixing member 6 to pass through the first bracket group 1. Two stent sets 2 are attached to the bones 51, 52 to obtain sufficient fixation force.
請參閱第3圖所示,該第一支架組1係設置在手掌近端的該骨頭51處,該第二支架組2則設置在手掌遠端的該骨頭52處;或者,亦可如第4圖所示,將該第二支架組2係設置在手掌近端的該骨頭51處,該第一支架組1則設置在手掌遠端的該骨頭52處。無論該彈性件3是靠近該第一支架組1或該第二支架組2設置,皆可藉由該樞接部41對應結合於該樞轉部42,並設置於關節5旋轉中心,進而提供該關節5活動所需之角 度,發揮持續釋放撐開作用張力F的功能,預防該關節5攣縮。 Referring to FIG. 3, the first stent set 1 is disposed at the bone 51 at the proximal end of the palm, and the second stent set 2 is disposed at the bone 52 at the distal end of the palm; or As shown in Fig. 4, the second stent set 2 is placed at the bone 51 at the proximal end of the palm, and the first stent set 1 is placed at the bone 52 at the distal end of the palm. The elastic member 3 is disposed adjacent to the first bracket group 1 or the second bracket group 2, and is coupled to the pivot portion 42 by the pivoting portion 41, and is disposed at the center of rotation of the joint 5, thereby providing The angle required for the joint 5 to move Degree, the function of continuously releasing the stretching force F is exerted to prevent the joint 5 from contracting.
另外,該彈性件3與該第一支架組1、該第二支架組2的連接端可進行調整,如本實施例的該彈性件3一端固定於該第二支架組2,該彈性件3另一端則可樞轉地結合至該第一支架組1;當然,亦可將該彈性件3一端固定於該第一支架組1,該彈性件3另一端可樞轉地結合至該第二支架組2。 In addition, the connecting end of the elastic member 3 and the first bracket group 1 and the second bracket group 2 can be adjusted. For example, one end of the elastic member 3 is fixed to the second bracket group 2, and the elastic member 3 is The other end is pivotally coupled to the first bracket set 1; of course, one end of the elastic member 3 can also be fixed to the first bracket set 1, and the other end of the elastic member 3 can be pivotally coupled to the second bracket Bracket set 2.
該彈性件3的數量至少為一個,本實施例則同時設置有二個,該二彈性件3之兩端分別連接該該第一支架組1與該第二支架組2。 The number of the elastic members 3 is at least one. In this embodiment, two of the elastic members 3 are disposed at the same time. The two ends of the two elastic members 3 are respectively connected to the first bracket group 1 and the second bracket group 2.
藉此,可在該第一支架組1連接一或二個該彈性件3,或在該第二支架組2連接一或二個彈性件3,視實際需求而進行變化。 Thereby, one or two elastic members 3 can be connected to the first bracket group 1, or one or two elastic members 3 can be connected to the second bracket group 2, and can be changed according to actual needs.
請參閱第5圖所示,本發明的結構可再進一步變化,其中,該第一支架組1及該第二支架組2皆為二非對稱之金屬板體,該第一支架組1的該金屬板體自該第一固定部11往外延伸具有一樞接部41,或該第二支架組2的該金屬板體自該第二固定部21往外延伸該樞接部41,該彈性件3則具有一樞轉部42,該樞轉部42對應結合於該樞接部41。 Referring to FIG. 5, the structure of the present invention can be further changed, wherein the first bracket group 1 and the second bracket group 2 are two asymmetric metal plates, and the first bracket group 1 The metal plate body extends outwardly from the first fixing portion 11 to have a pivoting portion 41, or the metal plate body of the second bracket group 2 extends the pivoting portion 41 outwardly from the second fixing portion 21, the elastic member 3 There is a pivoting portion 42 , and the pivoting portion 42 is correspondingly coupled to the pivoting portion 41 .
又,該彈性件3除為前述U形彎曲的該幾何形變區31,亦可採取任何產生幾何形變的造型來完成該幾何形變區31,使該幾何形變區31的徑長S可調變,以提供穩定且持續之作用張力F。 In addition, the elastic member 3 is divided into the U-shaped curved geometric deformation region 31, and any geometric deformation can be adopted to complete the geometric deformation region 31, so that the radial length S of the geometric deformation region 31 can be changed. To provide a stable and sustained action tension F.
該第一支架組1、第二支架組2及該彈性件3係為形狀記憶合金所構成,該形狀記憶合金為鎳鈦合金,利用鎳鈦合金記憶之特性,不僅製造容易,且手術簡單。 The first bracket group 1, the second bracket group 2, and the elastic member 3 are formed of a shape memory alloy. The shape memory alloy is a nickel-titanium alloy, and the characteristics of the memory of the nickel-titanium alloy are not only easy to manufacture but also simple in operation.
有關以鎳鈦合金製造該動態外固定裝置10的過程包括有: 1. 鈦鎳合金板材成形製程;2. 板材機械加工;3. 超彈熱機製程;以及4. 表面鈍化處理。 The process for manufacturing the dynamic external fixture 10 from nickel titanium alloy includes: 1. Titanium-nickel alloy sheet forming process; 2. Sheet metal machining; 3. Superelastic thermal mechanism; and 4. Surface passivation treatment.
經過前述簡單的製造過程,即可完成本發明所需的該動態外固定裝置10。 The dynamic external fixation device 10 required by the present invention can be completed by the aforementioned simple manufacturing process.
如第6圖所示,關於鎳鈦合金成型的該動態外固定裝置10的手術實施過程包括有:步驟1. 降溫本發明的該動態外固定裝置10,施加外力縮短該幾何形變區31的徑長S;步驟2. 利用鋼針或是骨釘等固定件6將該動態外固定裝置10固定於骨折處;以及步驟3. 重新加熱至室溫,使動態外固定裝置10回復彈性,此時該幾何形變區31的徑長S調變而產生持續穩定的作用張力F於該關節5處。 As shown in FIG. 6, the surgical implementation process of the dynamic external fixation device 10 for Nitinol molding includes: Step 1. Cooling the dynamic external fixation device 10 of the present invention, applying an external force to shorten the diameter of the geometric deformation region 31 Length S; Step 2. Fix the dynamic external fixation device 10 to the fracture by means of a fixing member 6 such as a steel needle or a nail; and Step 3. Reheat to room temperature to restore the dynamic external fixation device 10 to elasticity. The radial length S of the geometric deformation zone 31 is modulated to produce a continuously stable acting tension F at the joint 5.
藉由前述說明的本專利動態外固定裝置,相較於習用技術,更具有下列優點: The above-mentioned patented dynamic external fixing device has the following advantages compared with the conventional technology:
1. 本發明手術簡單,可提供一穩定之作用力持續作用於受傷關節,預防關節攣縮。 1. The invention has simple operation and can provide a stable force to continuously act on the injured joint and prevent joint contracture.
2. 本發明的結構體積小,厚度僅1-2mm,可將外固定對患者之影響降至最低,維持日常生活之活動。 2. The structure of the present invention is small in size and only 1-2 mm in thickness, which can minimize the influence of external fixation on patients and maintain activities in daily life.
3. 本發明的設計簡單,不須繁雜之加工過程,僅需簡單之機械加工、熱機製程和表面處理即可完成。 3. The design of the invention is simple, and does not require complicated processing, and can be completed by simple mechanical processing, thermal mechanism and surface treatment.
上列詳細說明係針對本發明之一可行實施例之具體說明,惟該實施例並非用以限制本發明之專利範圍,凡未脫離本發明技藝精神所為之等效實施或變更,均應包含於本案之專利範圍中。 The detailed description of the preferred embodiments of the present invention is intended to be limited to the scope of the invention, and is not intended to limit the scope of the invention. The patent scope of this case.
1‧‧‧第一支架組 1‧‧‧First stent set
11‧‧‧第一固定部 11‧‧‧First Fixed Department
12、22‧‧‧貫孔 12, 22‧‧‧through holes
2‧‧‧第二支架組 2‧‧‧Second bracket set
21‧‧‧第二固定部 21‧‧‧Second fixed department
3‧‧‧彈性件 3‧‧‧Flexible parts
31‧‧‧幾何形變區 31‧‧‧Geometric deformation zone
41‧‧‧樞接部 41‧‧‧ pivotal department
42‧‧‧樞轉部 42‧‧‧ pivoting department
6‧‧‧固定件 6‧‧‧Fixed parts
10‧‧‧動態外固定裝置 10‧‧‧Dynamic external fixture
S‧‧‧徑長 S‧‧‧ path length
Claims (7)
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TW102143978A TWI528954B (en) | 2013-12-02 | 2013-12-02 | Dynamic external fixation device |
CN201410207104.XA CN104665903B (en) | 2013-12-02 | 2014-05-15 | Dynamic external fixing device |
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TW102143978A TWI528954B (en) | 2013-12-02 | 2013-12-02 | Dynamic external fixation device |
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TW201521701A TW201521701A (en) | 2015-06-16 |
TWI528954B true TWI528954B (en) | 2016-04-11 |
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CH680769A5 (en) * | 1989-08-23 | 1992-11-13 | Jaquet Orthopedie | |
NO305733B1 (en) * | 1997-07-07 | 1999-07-19 | Prototech As | A distraction apparatus |
US7879074B2 (en) * | 2005-09-27 | 2011-02-01 | Depuy Spine, Inc. | Posterior dynamic stabilization systems and methods |
TW200843690A (en) * | 2007-05-14 | 2008-11-16 | an-shi Ye | Device for fixing the skeleton externally |
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