M394805 五、新型說明： 【新型所屬之技術領域】 本新型是有關於一種用於髖部的假肢體，特別是有關 於一種股骨假體。 【先前技術】 股骨假體是用來連接髖與股骨的假肢體。使用時會在 髖安裝一髖臼，用來和股骨假體連接。股骨則會切開，讓 股骨假體能插入股骨内。 另外，股骨假體和股骨的連接技術，大概分為兩種。 一種是在股骨假體的表面成型凹凸不平的粗糙面，使人體 鬆質骨（或稱骨質）生長並附著於股骨假體；另一種是將 股骨假體的表面製為光滑面，並用骨水泥連接股骨假體的 光滑面與股骨。 雖股骨假體有前述兩種不同的連接技術，仍常發生股 骨假體與股骨分離的問題。這使研究人員開始思考，是否 有其他的連接技術。 【新型内容】 本新型之一技術態樣在於提供一種股骨假體，利用不 同的表面粗度，使股骨假體能抵抗不同的外力。 根據本新型一實施方式，一種股骨假體包含一關節連 接段、一頸段與一骨頭連接段。關節連接段用以連接髖。 頸段連接關節連接段與骨頭連接段。骨頭連接段一端用以 3 M394805 連接股骨。骨頭連接段包含一抗拉力段與一抗剪力段。抗 拉力段的表面粗度在0.6em以下。抗剪力段的表面粗度 為 6/z m-10/z m。 【實施方式】 第1圖繪示本新型一實施方式之股骨假體的前視圖， 第2圖繪示第1圖之股骨假體使用狀態的前視圖。如圖所 示，股骨假體包含一關節連接段1〇〇、一頸段2〇〇與一骨 頭連接段300。關節連接段1〇〇用以連接髖a。頸段2〇〇 連接關節連接段100與骨頭連接段3〇〇。骨頭連接段3〇〇 一端用以連接股骨b。骨頭連接段3〇〇包含一抗拉力段31〇 與-抗剪力段320。抗拉力段31〇的表面粗度在〇 6#m 以下。抗剪力段320的表面粗度為m_1〇^ m。 ·- 使用時，醫療人員會先在髖a安裝一髖白c,並將股 骨b切開。關節連接段會容納在髖臼⑼，使關節連 接段1◦◦與如°構成—球型關節。骨頭連接段300會插 内’抗剪力段320能供鬆質骨生長並附著，抗拉 力段310則是利㈣水泥和股fb連接。由於表面粗度較 小的抗拉力段31〇，利用骨水泥連接股骨b時，連接面能 產生較=的鍵結力，因此能承受較大的拉力；表面粗度較 大的^剪力段物，纽表㈣雌較大，因此能承受較 大的剪力。 ㈣ίΖί:不’可證明表面粗度較小時，確實能提供較 ==度，表面粗度在較大以上時，確實能提供較佳 4 iV1 外4805 .—一 骨泥/骨柄鍵 結介面應力 表 面粗糙度（Ra) 0.6 β m 抛光面 2 /z m 喷砂處理 6〜10/z m 噴砂處理 抗拉強度 _JMPa) 2.81 — . 1.61 1.73 抗剪強度 1.54 3.32 — 7.2 其中，骨頭連接段300包含一頭部3〇1、一幹部3〇2 與一尾部303。頭部301與頸段200連接。且抗拉力^31〇 位於頭部301，抗剪力段320位於幹部3〇2。使抗拉力段 與頸段200相鄰，抗剪力段320與抗拉力段31〇相鄰^ *由於骨頭連減迎的頭部301會接受由心所㈣ 的杈向力，因此橫向的拉力較大；幹部3〇2會接受人體的 重量所傳遞的縱向力，因此縱向的剪力較大。將=拉力段 310設置在頭部3Q1，抗剪力段32Q設置在幹部3〇2，= 確實提升骨頭連接段300與股骨b之間的連接力。 另外，骨頭連接段300的尾部303，表面粗度可以與 抗剪力段32G的表面粗度-樣，製為“叫“⑺。由於 大部份的剪力以被幹部3〇2的抗剪力段咖吸收，因此尾 部303所需抵抗的t力較彳、。不過如果 受煎力的上限’也能避免幹部302的抗剪二 : 損壞而無法吸收剪力的問題。 又思外 5 M394805 雖然本新型已以實施方式揭露如上，然其並非用以限 定本新型，任何熟習此技藝者，在不脫離本新型之精神和 範圍内，當可作各種之更動與潤飾，因此本新型之保護範 圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 第1圖繪示本新型一實施方式之股骨假體的前視圖。 第2圖繪示第1圖之股骨假體使用狀態的前視圖。 【主要元件符號說明】 100 :關節連接段 310 :抗拉力段 200 :頸段 320 :抗剪力段 300 :骨頭連接段 a 髖 301 :頭部 b 股骨 302 :幹部 c 髖臼 303 :尾部M394805 V. New description: [New technical field] The present invention relates to a prosthesis for the hip, in particular to a femoral prosthesis. [Prior Art] A femoral prosthesis is a prosthetic body used to connect the hip to the femur. An acetabular fistula is attached to the hip for use in connection with the femoral prosthesis. The femur will be cut open so that the femoral prosthesis can be inserted into the femur. In addition, the connection technique of femoral prosthesis and femur is roughly divided into two types. One is to form a rough surface on the surface of the femoral prosthesis, so that the human cancellous bone (or bone) grows and attaches to the femoral prosthesis; the other is to make the surface of the femoral prosthesis smooth, and use bone cement Connect the smooth surface of the femoral prosthesis to the femur. Although the femoral prosthesis has the two different joining techniques described above, the problem of separation of the femoral prosthesis from the femur often occurs. This led researchers to think about whether there are other connectivity technologies. [New content] One of the technical aspects of the present invention is to provide a femoral prosthesis that utilizes different surface roughness to make the femoral prosthesis resistant to different external forces. In accordance with an embodiment of the present invention, a femoral prosthesis includes a joint attachment section, a neck section and a bone attachment section. The articulating section is used to connect the hip. The neck segment connects the joint connecting section to the bone connecting section. One end of the bone connection section is used to connect the femur with 3 M394805. The bone connecting section includes a tensile force section and a shear resistant section. The surface roughness of the tensile force section is below 0.6 em. The surface roughness of the shear resistance section is 6/z m-10/z m. [Embodiment] FIG. 1 is a front view of a femoral prosthesis according to an embodiment of the present invention, and FIG. 2 is a front view showing a state of use of the femoral prosthesis of FIG. 1. As shown, the femoral prosthesis includes an articulating segment 1〇〇, a neck segment 2〇〇, and a bone connecting segment 300. The articulating section 1〇〇 is used to connect the hip a. The neck section 2〇〇 connects the joint section 100 to the bone connection section 3〇〇. One end of the bone connecting section 3〇〇 is used to connect the femur b. The bone connecting section 3A includes a tensile force section 31〇 and a shear resistant section 320. The surface roughness of the tensile force section 31〇 is 〇6#m or less. The surface roughness of the shear resistance section 320 is m_1〇^m. ·- When using, the medical staff will first install a hip white c on the hip a and cut the femur b. The articulating section will be housed in the acetabulum (9), so that the joint connecting section 1◦◦ and the spherical joint will be formed. The bone connecting section 300 will be inserted into the 'anti-shear force section 320 for the cancellous bone to grow and adhere, and the tensile section 310 is the joint of the cement and the fb. Due to the small tensile strength of the surface section 31〇, when the femur b is connected by bone cement, the joint surface can produce a stronger bonding force, so that it can withstand a larger pulling force; Segments, New Zealand (4) Large females, so they can withstand large shear forces. (4) ίΖί: If you can't prove that the surface roughness is small, it can provide more than == degree. When the surface roughness is larger than above, it can provide better 4 iV1 and 4805. Surface roughness (Ra) 0.6 β m Polished surface 2 /zm Sandblasted 6~10/zm Sandblasted tensile strength _JMPa) 2.81 — . 1.61 1.73 Shear strength 1.54 3.32 — 7.2 wherein the bone connecting section 300 contains one The head 3〇1, a stem 3〇2 and a tail 303. The head 301 is coupled to the neck section 200. And the tensile force ^31〇 is located at the head 301, and the shear resistance section 320 is located at the trunk 3〇2. The tensile force section is adjacent to the neck section 200, and the shear resistance section 320 is adjacent to the tensile force section 31〇. * Because the head 301 of the bone joint reduction receives the yaw force of the heart (4), the lateral direction The pulling force is larger; the cadre 3〇2 will receive the longitudinal force transmitted by the weight of the human body, so the longitudinal shearing force is larger. The = tension section 310 is placed at the head 3Q1, and the shear section 32Q is set at the trunk 3〇2, = the connection force between the bone connecting section 300 and the femur b is indeed raised. Further, the tail portion 303 of the bone connecting section 300 may have a surface roughness which is thicker than the surface of the shear-resistant section 32G, and is made "called" (7). Since most of the shear force is absorbed by the shearing force of the stem portion 3, 2, the tail force 303 is required to resist the t force. However, if the upper limit of the frying force is also avoided, the shear resistance of the stem 302 can be avoided: the damage cannot be absorbed. 5 M394805 Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this new type is subject to the definition of the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front elevational view of a femoral prosthesis according to an embodiment of the present invention. Fig. 2 is a front elevational view showing the state of use of the femoral prosthesis of Fig. 1. [Main component symbol description] 100: Joint connection section 310: Tension resistance section 200: Neck section 320: Shear resistance section 300: Bone connection section a Hip 301: Head b Femur 302: Cadmium c Acetabular 303: Tail