JP4498909B2 - Artificial shoulder joint - Google Patents

Artificial shoulder joint Download PDF

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JP4498909B2
JP4498909B2 JP2004369728A JP2004369728A JP4498909B2 JP 4498909 B2 JP4498909 B2 JP 4498909B2 JP 2004369728 A JP2004369728 A JP 2004369728A JP 2004369728 A JP2004369728 A JP 2004369728A JP 4498909 B2 JP4498909 B2 JP 4498909B2
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head
shoulder joint
prosthesis
joint
spherical
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JP2006174946A (en
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憲司 土居
孝一 藏本
広幸 高橋
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ナカシマプロペラ株式会社
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/40Joints for shoulders
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof

Description

本発明は、リウマチ(RA)を罹患している患者等の肩関節に置換して好適な人工肩関節に関するものである。 The present invention relates to a suitable shoulder prosthesis to replace the shoulder joint, such as patients suffering from arthritis (RA).

RA患者の約2/3において、その肩関節に何らかの障害があると言われている。 In approximately two-thirds of RA patients, it is said that there is some fault in the shoulder joint. 特に、RA患者では、腱板(肩甲下筋、棘上筋、棘下筋、小円筋といった筋肉からなる腱要素が関節包と一緒になったもの)の機能不全及び肩関節破壊によって骨頭が上方に移動し易くなっており、内外転時に関節面と骨頭との干渉が起こり易い。 In particular, in the RA patients, rotator cuff dysfunction and bone head by a shoulder joint destruction (subscapularis, supraspinatus muscle, infraspinatus muscle, tendon element consisting of muscle, such as small circle muscle that together with the joint capsule) There have become easily move upward, it is likely to occur interference between the articular surface and the bone head when out rolling. このときには、骨頭が強く関節面を擦って疼痛を伴うため、肩関節破壊が進行したRA患者に対しては、人工肩関節に置換することが行われている。 At this time, since the painful rubbing articular surface strongly femoral head, for RA patients shoulder joint destruction progressed, it has been performed to replace the artificial shoulder joint.

従来の人工肩関節においては、特許文献1に見られるように、骨頭に相当する部分をこれと略同じ大きさの半球状のヘッドで代替しているものが多い。 In the conventional shoulder prosthesis, as seen in Patent Document 1, there are many that are replaced by a hemispherical head of substantially the same size the portion corresponding to the femoral head with this. 肩関節の動きには、内転と外転及び外旋と内旋とがあるが、日常生活では、例えば、顔を洗う、身体を拭く、食事をする(女性の場合は化粧をすることも含まれる)といったように圧倒的に内転動作が多い。 The movement of the shoulder joint, but there are a adduction and abduction and external rotation and internal rotation, in everyday life, for example, wash your face, wipe the body, if you want to eat (of the woman also be a cosmetic overwhelmingly adduction operate as such included) often. このような場合において、従来の人工肩関節では、内転したときに、球形の下端の角が関節面を擦り、激しい疼痛を引き起こしていた。 In such a case, the conventional shoulder prosthesis, when adduction, the corners of the lower end of the spherical rubs articular surface, was causing severe pain.

このようなことを解消するには、ヘッドの球面を増やすことが考えられる。 To solve such thing, it is considered to increase the spherical surface of the head. このため、特許文献2では、ヘッドの上端(肩峰)側の球面を延長する提案がなされている。 Therefore, Patent Document 2 proposes to extend the sphere of the upper end (the acromion) of the head has been made. こうすることで、球面が関節面から外れてしまう事態を避けようとしているのであるが、その効果があるのは、スポーツ等を行なう外転動作のときである。 In this way, although sphere is of trying to avoid a situation in which deviates from the joint surface, there is the effect is when the eversion operation for sports like. 上記したように、RA患者に必要なのは、日常動作に多い内転動作であることから、このような構成ではあまり意味がない。 As mentioned above, necessary in RA patients, since it is an internal rotation operation often in day-to-day operations, there is no much sense in such a configuration.

加えて、ヘッドの上端には大結節部が存在するから、ヘッドのこの部分を延長すると、干渉を避けるために大結節部を切除しなければならない(生体肩関節では、これを避けるために骨頭の球形形状は最小限に抑えられている)。 In addition, the femoral head from the upper end of the head there is the large nodules, extending this portion of the head must be excised greater tuberosity part in order to avoid interference (in vivo shoulder joint, in order to avoid this the spherical shape is minimized). そもそも、上腕骨は、三角筋と腱板とが緊張を保つことでぶら下がっている。 To begin with, the humerus, the deltoid muscle and the tendon plate is hanging by keeping the tension. したがって、大結節部を切除すると、腱板の緊張がなくなって上腕骨の保持が不安定になってしまい(ブラブラ状態)、日常生活に大いなる支障を来す。 Therefore, when you cut a large nodules, the holding of the upper arm bone is no longer tension of the tendon plate becomes unstable (dangling state), causing great trouble in daily life. このようなことから、人工肩関節に置換する場合も、大結節部を可能な限り温存するのが臨床上からも望ましいのはいうまでもない。 For this reason, even when replacing an artificial shoulder joint, of course desirable from the clinical has to preserve as much as possible the large nodules.
特開平07−194633号公報 JP 07-194633 discloses 特開2002−301094号公報 JP 2002-301094 JP

本発明は、ヘッドの下端側の球面を延長して日常生活に重要な上腕骨の内転動作のときの関節機能を確保したものである。 The present invention has ensured the joint function in the case of adduction operation key humerus daily life by extending the spherical surface of the lower end side of the head. 同時にヘッドの上端は、生体肩関節と同様に最小限の球形形状にして大結節部を切除しなくてもよいようにしたものである。 The upper end of the head at the same time are those similar to the living body shoulder joint with a minimum of spherical shape greater tuberosity part was set to be not excised.

以上の課題の下、本発明は、請求項1に記載した、上腕骨に挿入されるステムの先端にステムの軸芯と傾いて設けられるヘッド挿入部に生体の骨頭に該当する略半球状のヘッドを設けた人工肩関節において、 ヘッド挿入部の根元にヘッド挿入部の軸芯と直角で、上端はステムの上面とほぼ同じ高さに、下端はヘッドの下端近くまで設定されるフランジを形成する他、ヘッドの球面形状の下端側裏面に表面から凹陥するポケットを形成し、このポケットにフランジ及び上腕骨の下端を取り込んで球面形状の下端を骨頭よりも周方向に延長するも、球体の中心からヘッドの上端と下端とを結ぶ球面の拡がり角度を180°以内に抑えたことを特徴とする人工肩関節を提供したものである。 Under the above object, the present invention is claimed as described in claim 1, of the living body to the head insertion portion provided inclined with the axis of the stem to the tip of the stem to be inserted into the humerus semispherical corresponding to femoral head formed in the shoulder prosthesis having a head, a perpendicular to the axis of the head insertion portion at the base of the head insertion portion, the upper end is at substantially the same height as the upper surface of the stem, the flange lower end is set to near the lower end of the head addition to, forming a pocket for recessed from the surface to the lower side the rear surface of the spherical shape of the head, also extending the lower end of the spherical shape in the circumferential direction than the femoral head captures the lower end of the flange and the humerus on the pocket, spherical body is obtained by providing a shoulder prosthesis, characterized in that it suppresses the spread angle of the spherical connecting the upper and lower ends of the head from the center of within 180 °.

本発明が以上の手段をとることにより、すなわち、ヘッドの球面形状の上端側は普通の拡がりであるが、下端側のみが延長(拡張)されているとともに、球面の拡がり角度は180°以内に抑えられているから、大結節部の切除は必要ないとともに、内転は生体肩関節よりも大きな角度まで関節面で支受した関節運動を確保できる。 By the present invention takes the means described above, i.e., the upper side of the spherical shape of the head is a common spread, with only the lower end is extended (expanded), expanding angle of spherical within 180 ° because suppressed is, with no excision of the large nodules required, adduction can secure a joint motions 支受 the joint surfaces to a greater angle than the biological shoulder joint. 謂わば、内転側の関節機能を生体肩関節よりも拡大して日常の動作に支障がないようにしたものともいえる。 In-called, also it can be said that the joint function of the adductor side was that there is no hindrance to the day-to-day operations to expand than the biological shoulder joint. 加えて、大結節部を切除しないのであるから、手術時の患者の負担を軽減させるとともに、上腕骨を健常時と同様に保持できる。 In addition, since it is not excised large nodules, with reducing the burden on the patient during surgery, Ru can hold humerus as with healthy at.

以下、本発明を実施するための最良の形態を図面を参照して説明する。 Hereinafter will be described the best mode for carrying out the present invention with reference to the drawings. 図1は本発明の一例を示す人工肩関節の断面図、図2は側面図、図3はヘッドの形状説明図、図4は肩関節に置換したときの正面図、図5はヘッドの他の形状の形状説明図であるが、本発明に係る人工肩関節は、上腕骨1の骨頭に該当するヘッド2と、ヘッド2を装着して上腕骨1に挿入されるステム3とからなる。 1 is a sectional view of a shoulder prosthesis illustrating an example of the present invention, FIG 2 is a side view, FIG 3 is the shape illustration of the head, Figure 4 is a front view when replacing the shoulder joint, the other 5 head it is a shape explanatory view of a shape of an artificial shoulder joint of the present invention includes a head 2 corresponding to the humeral 1 femoral head, consisting of a stem 3 which is inserted into the humerus 1 wearing the head 2. 本発明のヘッド2は、要するに、その球面形状の下端側が生体の骨頭よりも延長(拡張)されて設けられており、かつ、球体の中心からヘッド2の上端と下端とを結ぶ球面の拡がり角度θが180°以内に抑えられているものであるが、具体的には、次のようにして決定される(図3)。 Head 2 of the present invention, in short, the spread angle of the spherical connecting the than condylar lower end of biological spherical provided is extended (expanded), and, from the center of the sphere of the head 2 and the upper and lower ends θ but is what is suppressed to within 180 °, specifically, is determined as follows (Figure 3).

すなわち、まず、球体の中心Oから半径Rとする略半分の球面を球面部分の外郭面とする。 That is, first, the spherical surface of approximately half that from the center O of the sphere with radius R and the outer surface of the spherical portion. 一方、反球面側の外郭面は、側面視において、球体の上端を基準直径線R 1 (ステム3の後述するヘッド挿入部の軸線と直角な直径線)よりaだけ球面側に偏寄させるとともに、下端をb(一般的にはb<a)だけ球面側に偏寄させた点を設定し、上端から基準直径線R 1に直角な直径線R 2 (ヘッド挿入部の軸線と平行な直径線)までは基準直径線R 1とほぼ平行に延び、ここから下端までは基準直径線R 1に対して斜めに延びる直線を外郭面とする。 On the other hand, the outer surface of the counter-spherical surface side as viewed from the side, with is biasing only spherical side a from the upper end of the spherical reference diameter line R 1 (the axis perpendicular to the diameter line of the head insertion portion to be described later of the stem 3) sets a point (typically to b <a) lower the b was biasing only spherical side, parallel to the diameter and the axis of the perpendicular diameter line R 2 (the head insertion portion in a reference diameter line R 1 from the top until line) extending substantially parallel to the reference diameter line R 1, from here to the lower end is a straight line extending obliquely relative to the reference diameter line R 1 and the outer surface. なお、ヘッド2の上端や下端の角は十分にアールをとっておき、関節面4を強く擦らないように配慮する。 Incidentally, the upper and lower ends of the corner head 2 consideration sufficiently rounded aside so as not rub strongly articular surface 4.

加えて、中心Oからヘッド2の上端と下端を結ぶ拡がり角度θを180°以内に設定する。 In addition, setting the spreading angle θ connecting the upper and lower ends of the head 2 from the center O within 180 °. このような形状によるヘッド2は、その上端は、生体の骨頭とほぼ同じ拡がりとなり、下端は、中心Oから斜めの外郭線までの範囲で延長されたものになる。 Head 2 by such a shape, the upper end becomes substantially coextensive with the femoral head of a living body, the lower end may be something which is extended in the range from the center O to the oblique outline. このとき、ヘッド2の裏面の延長側は、薄い周壁2aを残して表面から凹陥したポケット2bに形成している。 In this case, the extension side of the back surface of the head 2 forms from the surface leaving a thin peripheral wall 2a pocket 2b were recessed. 本発明で、もっとも重要なヘッド2の形状要素は、ヘッド2下端(のみ)の球面が延長されることと、ヘッド2の拡がり角度θが腱板に影響を及ぼさない生体の骨頭の拡がり面積と略同じの180°以下に設定されることである。 In the present invention, the most important shape element of the head 2, and the spherical head 2 lower (only) is extended, the spreading area of ​​the femoral head of a living body divergence angle θ of the head 2 does not affect the cuff it is to substantially set to the same for 180 ° or less. この要件が充たされるものであれば、球体の下端点を基準直径線R 1上或いはこれをcだけ超えた点に設定してもよい(図5)。 As long as this requirement is satisfied, the reference diameter line R 1 above or which the lower end point of the sphere may be set to a point beyond only c (Fig. 5).

ステム3は、円柱状の本体部3aと本体部3aから斜めに突出するヘッド挿入部3bとからなる。 The stem 3 is made of a cylindrical main body 3a and the main body portion 3a and the head insertion portion 3b which protrudes obliquely. この場合のヘッド挿入部3bの傾斜角αは、上腕骨1を真下に下げたときに、関節面4のほぼ中央に向かう角度である概略40°程度に設定される。 The inclination angle α of the head insertion portion 3b in this case, when lowering the humerus 1 beneath is set to outline 40 ° about an angle substantially toward the center of the articular surface 4. ヘッド挿入部3bは、円形や異形(非対称)をした筒状体であり、本例では、若干先細りのテーパに形成してある。 Head insertion portion 3b is a the tubular body a circular or an irregular (asymmetric), in this example, it is formed in a tapered slightly tapered. ヘッド挿入部3bの根元側にはこれと直角なフランジ3cが形成されており、フランジ3cの上端は、本体部3aの上面とほぼ同じ高さに、下端は、ヘッド2下端にかなり近くまで張出している。 The root side of the head insertion portion 3b which perpendicular flange 3c is formed, the upper end of the flange 3c is flared at substantially the same height as the upper surface of the main body 3a, the lower end, until fairly close to the head 2 lower ing.

そして、フランジ3cの下側の半分程度からリブ3dを設けて本体部3aに連結して強度の保持を図っている。 Then, thereby achieving a holding strength coupled to the main body portion 3a from about half of the lower flange 3c provided ribs 3d. この他、本体部3aの反リブ3d側には骨との固着性を高めるために二枚の放射状に延びるフィン3eが形成されている。 In addition, the anti-rib 3d side of the main body 3a fins 3e extending two radial to enhance the fixation of the bone is formed. さらに、本体部3aの下端は挿入し易いように丸く形成されている。 Further, the lower end of the body portion 3a is rounded for ease of insertion.

ヘッド2とヘッド挿入部3bとの結合は、ヘッド2の裏面にヘッド挿入部3bが挿入できる挿入穴2cを形成し、ヘッド挿入部3bを挿入穴2cに圧入することで行っている。 Coupling between the head 2 and the head insertion portion 3b is performed by the head insertion portion 3b on the back surface of the head 2 to form an insertion hole 2c for insertion, press-fitting the head insertion portion 3b into the insertion hole 2c. このとき、ヘッド挿入部3bがテーパに形成されていることは、ヘッド挿入部3bの挿入深さを任意に調整できることに貢献する。 At this time, the head insertion portion 3b is formed in a tapered contributes to being able to freely adjust the insertion depth of the head insertion portion 3b. 加えて、ヘッド挿入部3b及び挿入穴2cが円形をしていると、本体部3aに対するヘッド2の角度(向き)も自由に調整できる。 In addition, the head insertion portion 3b and the insertion hole 2c is circular, the angle (direction) the head 2 with respect to the main body portion 3a can also be freely adjusted. 肩関節の置換を必要とする患者の肩関節のサイズは様々であるから、それに対応できるようにしたものである。 Since the size of the shoulder joint of a patient in need of replacement of the shoulder joint is variable, it is obtained by allowing correspondingly.

ただし、調整の煩わしさもあることから、これを排する観点からいえば、ヘッド挿入部3bと挿入穴2cとを結合するときの角度(位相)は決まっていることが好ましい(ヘッド2の向きはステム3を挿入するときの向きによって調整する)。 However, since there is also troublesome adjustment, from the viewpoint of Haisuru this angle (phase) is preferably determined in (the head 2 orientation when coupling the insertion hole 2c and the head insertion portion 3b adjusted by the orientation when inserting the stem 3). 図6はこの場合におけるヘッド挿入部3bの断面図、図7は挿入穴2cの断面図であるが、このように、ヘッド挿入部3bを瓢箪形にすれば(挿入穴2cは鍵穴形にしているが、これは加工性を考慮したためで、格別の意味はない)、決まった向き(位相)で結合される。 Figure 6 is a sectional view of the head insertion portion 3b in this case, although FIG. 7 is a sectional view of the insertion hole 2c, this way, if the head insertion portion 3b in gourd shape (insertion hole 2c is in the keyhole shape It is, this is because in consideration of workability, special meaning not) is coupled in a fixed orientation (phase). この場合、間違い等をなくすために、結合位相は一カ所のみのものが好ましい。 In this case, in order to eliminate mistakes, etc., binding phase preferably has only one place. なお、瓢箪形、鍵穴形は一例であって、これに限定されるものではない。 Incidentally, gourd-shaped, keyhole shape is one example, but is not limited thereto.

以上の人工肩関節の置換に要する手術は、従来型の人工肩関節を置換する場合とほとんど変わらない。 Surgery required to replace the more artificial shoulder joint, almost unchanged from the case to replace the conventional shoulder prosthesis. すなわち、骨頭を切除して骨端面をフランジ3cの面と平行に整形してステム3の本体部3aを上腕骨1にそのフランジ3cの下面が骨端面に接触するまで挿入する。 That is, the lower surface of the flange 3c of the main body portion 3a of the stem 3 of the bone end face parallel to shaping the surface of the flange 3c by cutting the femoral head to the humerus 1 is inserted until it contacts the bone end surfaces. この場合、上記した結合位相調整型の人工肩関節であれば、ステム3を挿入した後、患者の肩関節のサイズに合ったヘッド2を選択し、ヘッド2の挿入深さと向きが最適になるようにヘッド2をステム3に結合する。 In this case, if the shoulder prosthesis of binding phase adjustment type described above, after inserting the stem 3, select the head 2 that matches the size of the patient's shoulder joint, the insertion depth and orientation of the head 2 is optimum coupling the head 2 to the stem 3 as. 一方、結合位相決定型のものであれば、本体部3a自体の深さと向きを調整して挿入することになる。 On the other hand, as long as the combined phase decision type, it will be inserted by adjusting the depth and orientation of the main body 3a itself.

このとき、上腕骨1の下端がヘッド2からはみ出る部分を切除し、周壁2aで囲まれるポケット2bの中に取り込むのが適する。 At this time, the lower end of the humerus 1 is excised portion protruding from the head 2, suitably in capture in the pocket 2b surrounded by the peripheral wall 2a. 上腕骨1の下端部分がヘッド2で覆われ、傷付き等が防止できるからであるが、この部分には、上腕骨1の保持機能を果たす筋の付着がないから、切除したとしても、保持機能には影響がない。 The lower end portion of the humerus 1 is covered by the head 2, but because scratches or the like can be prevented, in this portion, because there is no attachment of the muscle to perform a holding function of the humerus 1, even excised, held there is no effect on the function. ステム3を上腕骨2に挿入したとき、そのリブ3dやフィン3eは上腕骨の海綿骨に埋入され、浮上がりや回転を抑制している。 When the stem 3 is inserted into the humerus 2, the ribs 3d and fins 3e is embedded in the cancellous bone of the humerus, thereby suppressing lifting and rotation. なお、必要であれば、リブ3dやフィン3eにスクリューを挿通できる孔をあけておき、ここからスクリューを通して皮質骨にねじ止めしてもよい(図示省略)。 Incidentally, if necessary, leave a hole capable inserting the screw rib 3d and fins 3e, which may (not shown) screwed into the cortical bone from here through the screw.

以上の人工肩関節を肩に置換すると、ヘッド2の球面は関節面3を摺動して内外転及び内外旋時における円滑な関節機能を発揮する。 Substitution on the shoulder over the shoulder prosthesis, the spherical head 2 exhibits a smooth joint function in the inner and outer rolling and out 旋時 slides the articular surface 3. 本発明に係る人工肩関節は、特に、RA患者を対象としたものであり、このような患者は、日常生活に多い内転動作に不自由するのは上述したとおりである。 The shoulder prosthesis according to the present invention are, in particular, those intended for the RA patients, such patients to inconvenience the adduction operation common in daily life is as described above. この内転に必要な最大内転角度βは、窩を拭ったりする動作のときの約45°とされており、この人工肩関節のステム3(上腕骨1)を45°内転したとしても、ヘッド2は関節面4に接触しており、関節機能を発揮させる(図4)。 The maximum in the rolling angle β required this adduction, are approximately 45 ° when the operation or wiped fossa, also the stem 3 of the shoulder prosthesis (humerus 1) was 45 ° adduction , head 2 is in contact with articular surface 4, thereby exerting a joint function (Fig. 4). このとき、ヘッド2の下端の角は十分なアールに形成されているから、擦れて疼痛を起こすこともない。 At this time, since the lower end corner of the head 2 is formed in a sufficient Earl, nor cause pain rubbing.

なお、この内転動作のとき、上腕骨1の下端は、関節面4を構成する窩筋4aと干渉することがあるから、その場合は、干渉範囲A(図4)だけ、上腕骨1又は窩筋4aを切除することがある。 Incidentally, when the adduction operation, the lower end of the humerus 1, because it may interfere with 窩筋 4a constituting the articular surface 4, in this case, interference range A (Fig. 4) only, humerus 1 or sometimes excised 窩筋 4a. ところで、以上のヘッド2やステム3は、人体に悪影響を及ぼさないチタン合金やコバルトクロームモリブデン合金等の生体適合金属で構成されるのはいうまでもない。 Meanwhile, more than the head 2 and the stem 3, being composed of a biocompatible metal such as titanium alloy, cobalt chrome molybdenum alloy having no adverse effect on the human body of course.

人工肩関節の断面側面図である。 It is a cross-sectional side view of the prosthesis. 人工肩関節の背面図である。 It is a rear view of the artificial shoulder joint. 人工肩関節のヘッドの側面図である。 It is a side view of the prosthesis head. 人工肩関節を肩関節に置換した状態の側面図である。 Is a side view of a state in which replacing artificial shoulder joint to the shoulder joint. 人工肩関節の側面図である。 It is a side view of the artificial shoulder joint. 人工関節のヘッド挿入部の断面図である。 It is a cross-sectional view of the head insertion portion of the prosthesis. 人工関節のヘッド挿入穴の断面図である。 It is a cross-sectional view of the head insertion holes of the prosthesis.

1 上腕骨 2 ヘッド 2a 周壁 2b ポケット 2c 挿入穴 3 ステム 3a 本体部 3b ヘッド挿入部 3c フランジ 3d リブ 3e フィン 4 肩関節面 4a 窩筋 1 humeral 2 heads 2a peripheral wall 2b pocket 2c insertion hole 3 stem 3a main body portion 3b head insertion portion 3c flange 3d ribs 3e fins 4 the shoulder joint surface 4a 窩筋

Claims (3)

  1. 上腕骨に挿入されるステムの先端にステムの軸芯と傾いて設けられるヘッド挿入部に生体の骨頭に該当する略半球状のヘッドを設けた人工肩関節において、 ヘッド挿入部の根元にヘッド挿入部の軸芯と直角で、上端はステムの上面とほぼ同じ高さに、下端はヘッドの下端近くまで設定されるフランジを形成する他、ヘッドの球面形状の下端側裏面に表面から凹陥するポケットを形成し、このポケットにフランジ及び上腕骨の下端を取り込んで球面形状の下端を骨頭よりも周方向に延長するも、球体の中心からヘッドの上端と下端とを結ぶ球面の拡がり角度を180°以内に抑えたことを特徴とする人工肩関節。 In the shoulder prosthesis having a substantially hemispherical head corresponding to the biological bone head head insertion portion provided inclined with the axis of the stem to the tip of the stem to be inserted into the humerus, the head insert to the base of the head insertion portion perpendicular and the axis of the parts, the pocket upper end at substantially the same height as the upper surface of the stem, the lower end of recess other to form a flange which is set to near the lower end of the head, from the surface to the lower side the rear surface of the spherical shape of the head is formed and also to extend the lower end of the spherical shape in the circumferential direction than the femoral head captures the lower end of the flange and the humerus on the pocket, the spread angle of the spherical connecting the upper and lower ends of the head from the center of the sphere body 180 ° shoulder prosthesis, characterized in that suppressed within.
  2. ヘッドがヘッド挿入部に対して深さ及び角度(向き)が調整可能に挿入されて結合される請求項1の人工肩関節。 Head depth relative to the head insertion portion and the angle (orientation) is adjustably inserted in claim 1 of the prosthesis to be coupled.
  3. ヘッドがヘッド挿入部に対して深さは調整可能で、角度(向き)は一定で挿入されて結合される請求項2の人工肩関節。 Head depth relative to the head insertion portion is adjustable, the angle (direction) according to claim 2 of the prosthesis to be coupled are inserted at a constant.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07501001A (en) * 1991-11-18 1995-02-02
US6045582A (en) * 1998-09-25 2000-04-04 Sulzer Orthopedics Inc. Implantable humeral shoulder prosthesis having extended articular surface
JP2000197651A (en) * 1998-11-13 2000-07-18 Accumed Inc Prosthesis for shoulder joint
JP2000312692A (en) * 1999-04-07 2000-11-14 Depuy Orthopaedics Inc Colorless type shoulder joint forming prosthesis and prosthesis system
JP2001000461A (en) * 1999-06-09 2001-01-09 Tornier Sa Artificial organ for humerus
JP2004160178A (en) * 2002-06-28 2004-06-10 Depuy Orthopaedics Inc Modular shoulder prosthesis

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DE20120703U1 (en) * 2001-12-21 2002-03-07 Keramed Medizintechnik Gmbh shoulder prosthesis

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07501001A (en) * 1991-11-18 1995-02-02
US6045582A (en) * 1998-09-25 2000-04-04 Sulzer Orthopedics Inc. Implantable humeral shoulder prosthesis having extended articular surface
JP2000197651A (en) * 1998-11-13 2000-07-18 Accumed Inc Prosthesis for shoulder joint
JP2000312692A (en) * 1999-04-07 2000-11-14 Depuy Orthopaedics Inc Colorless type shoulder joint forming prosthesis and prosthesis system
JP2001000461A (en) * 1999-06-09 2001-01-09 Tornier Sa Artificial organ for humerus
JP2004160178A (en) * 2002-06-28 2004-06-10 Depuy Orthopaedics Inc Modular shoulder prosthesis

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