JP7305619B2 - 歯科用ねじ - Google Patents
歯科用ねじ Download PDFInfo
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- JP7305619B2 JP7305619B2 JP2020512596A JP2020512596A JP7305619B2 JP 7305619 B2 JP7305619 B2 JP 7305619B2 JP 2020512596 A JP2020512596 A JP 2020512596A JP 2020512596 A JP2020512596 A JP 2020512596A JP 7305619 B2 JP7305619 B2 JP 7305619B2
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30721—Accessories
- A61F2/30749—Fixation appliances for connecting prostheses to the body
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- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
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- A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
- A61C8/0022—Self-screwing
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- 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
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- A61C8/0013—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy with a surface layer, coating
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- A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
- A61C8/0016—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy polymeric material
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- A61F2/00—Filters 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
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- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
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- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
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- 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
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- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
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- A61F2/00—Filters 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
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- A61F2/00—Filters 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
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- A61F2/00—Filters 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
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Epidemiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
- Vascular Medicine (AREA)
- Ceramic Engineering (AREA)
- Transplantation (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Cardiology (AREA)
- Neurology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Developmental Biology & Embryology (AREA)
- Plastic & Reconstructive Surgery (AREA)
- Surgical Instruments (AREA)
- Dental Prosthetics (AREA)
- Dental Preparations (AREA)
Description
2 頭部
3 ねじ山
4 柄部
5 キャップ
6 接触面
7 ドライブ
8 所定の破壊点
9 上部
10 円錐形状の部分
11 移行領域
12 移行領域
13 センタリングコーン
14 ブレード
15 ねじ山の歯
16 ねじ溝
17 先端部
18 フランク
19 インプラント
20 削孔
21 領域
22 切断縁
23 中心軸
24 アダプター
25 ホルダー
26 連結部
Claims (15)
- インプラントを固定するねじであって、
該ねじは生体吸収性材料からなり、
該ねじは、骨にねじ込まれるねじ山を有し、
該ねじは、キャップとドライブとを含む頭部を有し、
前記キャップは、前記インプラントのための基本的に平坦な接触面を有し、
前記ドライブと前記キャップとの間には、前記キャップの上部と前記ドライブとの間の狭窄部として設計された、所定の破壊点が存在し、前記ねじの柄部は前記キャップに向かう方向に厚みを増し、前記ねじ山の歯の幅は、前記歯の底部の幅の少なくとも0.5倍である、ねじ。 - 前記所定の破壊点は、狭窄部として設計されることを特徴とする、請求項1に記載のねじ。
- 前記キャップは板状に設けられ、前記キャップの前記所定の破壊点までの最大高さは、2mm未満である、又は1mm未満である、又は0.8mm未満であることを特徴とする、請求項1又は2に記載のねじ。
- 前記ねじは柄部を有し、前記柄部の最小直径は、前記ねじ山のコア径と同じであることを特徴とする、請求項1乃至3のいずれか一項に記載のねじ。
- 前記ねじ山は、ねじ込まれたときに、骨組織にねじ溝を切削するセルフタッピング先端部を有することを特徴とする、請求項1乃至4のいずれか一項に記載のねじ。
- 前記キャップの直径は1mm乃至6mmである、又は2mm~4mmである、及び/又は、
前記キャップの前記直径は、前記柄部、及び/又は前記ねじ山のコアの直径の1.5倍~5倍である、又は2倍~4倍である、及び/又は、
前記ねじ山のピッチは、0.5mm~1.6mmであり、及び/又は、
前記ねじ山の前記歯の外側は平坦に設計され、及び/又は、
前記ねじ山の前記歯は、前記歯の底部が丸みをもって前記歯のフランクに合流するよう、適切に設計され、及び/又は、
前記ねじがセンタリング先端部を有することを特徴とする、請求項1乃至5のいずれか一項に記載のねじ。 - 前記ねじは、マグネシウム、又はマグネシウム合金からなり、前記マグネシウム合金は、イットリウム、亜鉛、マンガン、及び/又はカルシウムを含むことを特徴とする、請求項1乃至6のいずれか一項に記載のねじ。
- 前記ねじはコーティングを有し、フッ化マグネシウム製のコーティングを有することを特徴とする、請求項1乃至7のいずれか一項に記載のねじ。
- 前記柄部は、前記頭部に隣接する円錐形状の部分又は円錐台形状の部分を有することを特徴とする、請求項1乃至8のいずれか一項に記載のねじ。
- 前記円錐形状の部分の中心軸に対する角度が、前記キャップへの移行領域において、より鋭角となっており、前記移行領域は、放射状として設計されていることを特徴とする、請求項9に記載のねじ。
- 前記移行領域の長さは0.5mm~2mmであることを特徴とする、請求項10に記載のねじ。
- 前記ねじは、前記キャップの下に円錐形状の部分を有し、前記円錐形状の部分は、前記ねじの中心軸に対して20度~40度である、又は平均35度~45度である、及び/又は、前記円錐形状の部分の長さは、0.2mm~10mmである、又は0.4mm~0.6mmであることを特徴とする、請求項1乃至11のいずれか一項に記載のねじ。
- 請求項1乃至12のいずれか一項に記載の少なくとも1つのねじとインプラントとを備えるキットであって、前記インプラントがシート状の構造物として設計される、キット。
- パイロットドリルを更に備え、前記パイロットドリルは、前記ねじの前記柄部とおおよそ同じ直径であり、及び/又は、ねじを保持するアダプターを備え、前記アダプターは、ハンドピース、又は歯科用ドリルを接続するための連結部及び/又は複数のねじのためのホルダーを有することを特徴とする、請求項13に記載のキット。
- インプラントを固定するねじであって、
該ねじは、生体吸収性材料、つまりマグネシウム、又はマグネシウム合金からなり、
該ねじは、骨にねじ込まれるねじ山を有し、
該ねじは、キャップとドライブとを含む頭部を有し、前記キャップは、前記インプラントのための基本的に平坦な接触面を有し、
前記ドライブと前記キャップとの間には、前記キャップの上部と前記ドライブとの間の狭窄部として設計された、所定の破壊点が存在し、
該ねじの柄部は、前記キャップに向かう方向に厚みを増し、
前記ねじ山は、前記ねじ山の歯の外側が平坦、又は丸みをもつよう設計され、前記ねじ山の前記歯の底部が丸みをもって前記歯のフランクに合流するよう、適切に設計されており、
前記ねじ山は、ねじ込まれたときに、骨組織にねじ溝を切削するセルフタッピング先端部を有する、ねじ。
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