JP2004173708A - Alveolar bone extender - Google Patents

Alveolar bone extender Download PDF

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Publication number
JP2004173708A
JP2004173708A JP2002339856A JP2002339856A JP2004173708A JP 2004173708 A JP2004173708 A JP 2004173708A JP 2002339856 A JP2002339856 A JP 2002339856A JP 2002339856 A JP2002339856 A JP 2002339856A JP 2004173708 A JP2004173708 A JP 2004173708A
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JP
Japan
Prior art keywords
bone
extension
moving
shaft
alveolar bone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002339856A
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Japanese (ja)
Inventor
Tomoaki Koseki
小関智明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koseki Medical KK
Original Assignee
Koseki Medical KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koseki Medical KK filed Critical Koseki Medical KK
Priority to JP2002339856A priority Critical patent/JP2004173708A/en
Publication of JP2004173708A publication Critical patent/JP2004173708A/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/60Surgical 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
    • A61B17/66Alignment, compression or distraction mechanisms
    • A61B17/663Alignment, compression or distraction mechanisms for jaw bones, e.g. subcutaneous distractors with external access
    • A61B17/666Alignment, compression or distraction mechanisms for jaw bones, e.g. subcutaneous distractors with external access for alveolar distraction

Abstract

<P>PROBLEM TO BE SOLVED: To provide an alveolar bone extender which enables to carry out longitudinal and transversal extensions at the same time. <P>SOLUTION: The extender which enables the longitudinal and transversal extensions at the same time is provided and configured to fix an alveolar bone base and an ablated moving bone piece in a fixing plate and a fixing plate for the moving bone piece, respectively. The alveolar bone base is pressed through a hole for the moving bone piece and dissociated from the moving bone piece when a screw for transversal extension inserted into a cylinder is turned, thus bone extension in the transversal direction is carried out. After the transversal extension is finished, a shaft for longitudinal extension is turned, thus the moving bone piece is extended in the longitudinal direction. A spanner having a shape enabling to turn the shaft for the longitudinal extension from all the positions is provided. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明が属する技術分野】
本発明は、人工歯根を埋め込む際、歯槽骨が薄く埋め込み不可能な場合に骨延長を行い、骨を厚くする歯槽骨延長器に関するものである。
【0002】
【従来の技術】
当社は特願2002−339339において、横(厚み)方向を延長することが可能な器具を提案しているが、縦(高さ)方向に骨延長ができない。
【0003】
【発明が解決しようとする課題】
人工歯根をインプラントしようとしても土台である歯槽骨が薄く、埋め込むスペースがない患者が多い。このような患者は従来人工歯根の装着をあきらめざるを得なかった。また横方向に延長ができても、縦方向に十分な骨量が確保できていない患者も多く、縦横同時延長が可能な器具が望まれていた。
【0004】
【課題を解決するための手段】
本発明は、骨同士を密着状態から日々少しずつ引き離すと骨同士の間に新生骨が形成される特性を利用している。移動骨片固定プレート、横延長用スクリュー、縦延長用シャフト、中空ロッド、固定用プレート、固定用スクリューから構成され、固定用プレートを固定用スクリューで歯槽骨土台に固定し、中空ロッドと固定用プレートはヒンジで接続され、移動骨片固定プレートに固定用スクリューで剥離された移動骨片を固定する。移動骨片固定プレート中央部は縦延長用シャフトが貫通し、空回りするよう中空構造となっており、縦延長用シャフト上には移動骨片固定プレートが上下に動かないようストッパーが付いており、移動骨片固定プレート中空部分の両翼中央部からは横延長用スクリューを通すシリンダーが煙突状に立ち上がっており、シリンダーの内側はネジ切りが施され、シリンダーに挿入された横延長用スクリューを回すと移動骨片の穴を通して歯槽骨土台が押され、移動骨片と乖離することにより横方向の骨延長を行う。横延長終了後、縦延長用シャフトを回転させ、中空ロッド内側にはねじ切りが施してあり、移動骨片を縦方向に延長させる構造とした。
【0005】
上記歯槽骨延長器により縦方向延長を行う際に使用するスパナであり、マイナス突起状に削り出された縦延長用シャフト先端に差し込めるようグリップ両端にプラス穴が開いている。プラス穴の角度は互いに45度ずれており、グリップは端部からやや中央部よりで直角に曲がっており、縦延長用シャフトをあらゆる位置から回転させることが可能な形状の縦延長用スパナとした。
【0006】
【発明の実施の形態】
図1は、当該発明の実施の形態を例示している。純チタン製薄型固定用プレート1を固定用スクリュー2aで歯槽骨土台に固定する。歯槽骨の表面状況に応じて固定箇所及び本数は適宜変える。固定用スクリュー2aはチタン製でもよいが、ポリ乳酸又はポリグリコール酸等の吸収性素材を用いるとプレート抜去の際容易である。移動骨片固定プレート3に固定用スクリュー2bで移動骨片4を固定する。同様に吸収性素材を用いてもよい。移動骨片固定プレート3中央部は縦延長用シャフト5が貫通し、空回りするよう中空構造となっており、縦延長用シャフト5上には移動骨片固定プレート3が上下に動かないようストッパー9a,9bが付いており、移動骨片固定プレート3中空部分の両翼中央部からは横延長用スクリュー6a,6bを通すシリンダー7a、7bが煙突状に立ち上がっている。シリンダー7a、7bの内側はネジ切りが施され、シリンダー7a、7bに挿入された横延長用スクリュー6a、6bを回すと移動骨片4の穴を通して歯槽骨土台8が押され、移動骨片4と乖離することにより横方向の骨延長を行う構造となっている。横延長用スクリュー6a、6bの先端は鈍加工が施してあり、スクリューを回しても先端が歯槽骨土台8に食い込まずに確実に骨延長が可能である。柔らかい樹脂キャップを被せるか、空回りの回転式としてもよい。横延長用スクリュー6a、6bのネジ切りピッチは一回転させると一日の必要量を延長させるよう設定されている。横延長終了後、縦延長用シャフト5を回転させると移動骨片固定プレート3の中空部分は空回りし、中空ロッド10内側のネジ切り構造によって固定された移動骨片4がせり上がってくる。歯槽骨延長後、保定期間を経て各々のプレートは取り外され、同時に人工歯根の埋め込み手術を行うこととなる。移動骨片固定プレート3及び固定用プレート1部分の加工に関しては、薄さと穴精度を同時に確保するため、まず厚板にドリルで穴を開け、シリンダー部分の高さを残してフライス盤で削り出す製造方法としている。
【0007】
図2は請求項2に係る縦延長用スパナを示している。あらゆる方向からのアプローチが可能であり、プレス加工のみで製造が可能なため、安価である。
【0008】
【発明の効果】
以上説明したように本発明は、人工歯根を埋め込む際、歯槽骨が薄く埋め込み不可能な場合に骨延長を行い、骨を厚くすることが可能となる。横方向のみならず、縦方向にも同時延長が可能なため、適応が広がり、より多くの患者に対して人工歯根のインプラント術を施行することが可能である。
【図面の簡単な説明】
【図1】歯槽骨延長器の外観図である。
【図2】縦延長用スパナの外観図である。
【符号の説明】
1 固定用プレート
2a、2b 固定用スクリュー
3 移動骨片固定プレート
4 移動骨片
5 縦延長用シャフト
6a、6b 横延長用スクリュー
7a、7b シリンダー
8 歯槽骨土台
9a、9b ストッパー
10 中空ロッド
[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alveolar bone extender that increases the thickness of an alveolar bone when the artificial alveolar bone is thin and cannot be implanted.
[0002]
[Prior art]
The Company proposes in Japanese Patent Application No. 2002-339339 a device that can extend in the horizontal (thickness) direction, but cannot extend the bone in the vertical (height) direction.
[0003]
[Problems to be solved by the invention]
Even when trying to implant an artificial root, there are many patients who have a thin alveolar bone as a base and have no space for implantation. Conventionally, such patients had to give up wearing artificial teeth. In addition, even if the patient can be extended in the horizontal direction, many patients have not been able to secure sufficient bone mass in the vertical direction.
[0004]
[Means for Solving the Problems]
The present invention makes use of the characteristic that new bones are formed between bones when the bones are gradually separated from the close contact state every day. It consists of a moving bone fragment fixation plate, a lateral extension screw, a vertical extension shaft, a hollow rod, a fixation plate, and a fixation screw.The fixation plate is fixed to the alveolar bone base with a fixation screw, and used for fixation with the hollow rod. The plates are connected by hinges, and the moving bone fragments exfoliated by the fixing screws are fixed to the moving bone fragment fixing plate. The central part of the moving bone fragment fixation plate has a hollow structure so that the shaft for vertical extension penetrates and idles, and there is a stopper on the shaft for vertical extension so that the moving bone fragment fixing plate does not move up and down, From the center of both wings in the hollow part of the moving bone fragment fixation plate, a cylinder that passes a screw for horizontal extension rises like a chimney, the inside of the cylinder is threaded, and when the screw for horizontal extension inserted in the cylinder is turned. The alveolar bone base is pushed through the hole of the moving bone fragment, and is separated from the moving bone fragment, thereby performing lateral bone extension. After the lateral extension, the longitudinal extension shaft was rotated, and the inside of the hollow rod was threaded to extend the moving bone fragment in the longitudinal direction.
[0005]
A wrench for use in performing longitudinal extension with the alveolar bone extender, and plus holes are provided at both ends of the grip so that the wrench can be inserted into the tip of the longitudinal extension shaft cut into a minus projection. The angles of the plus holes are shifted by 45 degrees from each other, and the grip is bent at a right angle from the end slightly from the center, so that the vertical extension wrench has a shape that can rotate the vertical extension shaft from any position. .
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 illustrates an embodiment of the present invention. The thin fixing plate 1 made of pure titanium is fixed to the alveolar bone base with the fixing screw 2a. The fixing place and the number of the alveolar bone are appropriately changed according to the surface condition. The fixing screw 2a may be made of titanium, but if an absorbent material such as polylactic acid or polyglycolic acid is used, it is easy to remove the plate. The moving bone fragment 4 is fixed to the moving bone fragment fixing plate 3 by the fixing screw 2b. Similarly, an absorbent material may be used. The central portion of the moving bone fragment fixing plate 3 has a hollow structure through which the shaft 5 for vertical extension penetrates and idles, and a stopper 9a on the shaft 5 for vertical extension to prevent the moving bone fragment fixing plate 3 from moving up and down. , 9b are attached, and cylinders 7a, 7b through which screws 6a, 6b for lateral extension are passed rise from the center of both wings of the hollow portion of the moving bone fragment fixing plate 3 in a chimney shape. The insides of the cylinders 7a and 7b are threaded, and when the screws 6a and 6b for lateral extension inserted into the cylinders 7a and 7b are turned, the alveolar bone base 8 is pushed through the holes of the moving bone fragments 4 and the moving bone fragments 4 are moved. It is structured to extend the bone in the lateral direction by deviating. The distal ends of the lateral extension screws 6a and 6b are dulled, so that even when the screws are turned, the distal ends can be reliably extended without cutting into the alveolar bone base 8. It may be covered with a soft resin cap, or may be an idle rotating type. The thread cutting pitch of the lateral extension screws 6a and 6b is set so that the required amount per day is extended when the screw is rotated once. When the shaft 5 for vertical extension is rotated after the lateral extension, the hollow portion of the movable bone fragment fixing plate 3 rotates idly, and the movable bone fragment 4 fixed by the threaded structure inside the hollow rod 10 rises. After the alveolar bone lengthening, each plate is removed after a retention period, and at the same time, an artificial root implant operation is performed. Regarding the processing of the moving bone fragment fixation plate 3 and the fixation plate 1 part, in order to simultaneously secure thinness and hole accuracy, drill a hole in a thick plate first, and cut it out with a milling machine leaving the height of the cylinder part And how to do it.
[0007]
FIG. 2 shows a wrench for longitudinal extension according to the second aspect. It is inexpensive because it can be approached from all directions and can be manufactured only by pressing.
[0008]
【The invention's effect】
As described above, according to the present invention, when an artificial dental root is implanted, if the alveolar bone is too thin to be implanted, the bone can be lengthened and the bone can be thickened. Since it is possible to simultaneously extend not only in the horizontal direction but also in the vertical direction, the adaptation is widened, and it is possible to perform an artificial root implant for more patients.
[Brief description of the drawings]
FIG. 1 is an external view of an alveolar bone extender.
FIG. 2 is an external view of a vertical extension spanner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fixing plate 2a, 2b Fixing screw 3 Moving bone fragment fixing plate 4 Moving bone fragment 5 Vertical extension shaft 6a, 6b Horizontal extension screw 7a, 7b Cylinder 8 Alveolar bone base 9a, 9b Stopper 10 Hollow rod

Claims (2)

人工歯根を埋め込む際、歯槽骨が薄く埋め込み不可能な場合に骨延長を行い、骨を厚くする器具であり、移動骨片固定プレート、横延長用スクリュー、縦延長用シャフト、中空ロッド、固定用プレート、固定用スクリューから構成され、固定用プレートを固定用スクリューで歯槽骨土台に固定し、中空ロッドと固定用プレートはヒンジで接続され、移動骨片固定プレートに固定用スクリューで剥離された移動骨片を固定し、移動骨片固定プレート中央部は縦延長用シャフトが貫通し、空回りするよう中空構造となっており、縦延長用シャフト上には移動骨片固定プレートが上下に動かないようストッパーが付いており、移動骨片固定プレート中空部分の両翼中央部からは横延長用スクリューを通すシリンダーが煙突状に立ち上がっており、シリンダーの内側はネジ切りが施され、シリンダーに挿入された横延長用スクリューを回すと移動骨片の穴を通して歯槽骨土台が押され、移動骨片と乖離することにより横方向の骨延長を行い、横延長終了後、縦延長用シャフトを回転させ、中空ロッド内側にはねじ切りが施してあり、移動骨片を縦方向に延長させることが可能な縦横同時歯槽骨延長器。When implanting artificial dental roots, this is a device to extend the bone and increase the thickness of the bone when the alveolar bone is too thin to be implanted. The plate consists of a plate and a fixing screw.The fixing plate is fixed to the alveolar bone base with the fixing screw. The bone fragment is fixed, and the central part of the moving bone fragment fixing plate has a hollow structure that the shaft for vertical extension penetrates and idles, so that the moving bone fragment fixing plate does not move up and down on the shaft for vertical extension. There is a stopper, and a cylinder through which a screw for lateral extension extends from the center of both wings in the hollow part of the moving bone fragment fixation plate rises like a chimney. When the screw for horizontal extension inserted in the cylinder is turned, the alveolar bone base is pushed through the hole of the moving bone fragment, and the bone is extended in the lateral direction by separating from the moving bone fragment. After the lateral extension, the longitudinal extension shaft is rotated, and the inside of the hollow rod is threaded, so that the moving bone fragments can be extended in the vertical direction. 上記歯槽骨延長器により縦方向延長を行う際に使用するスパナであり、マイナス突起状に削り出された縦延長用シャフト先端に差し込めるようグリップ両端にプラス穴が開いており、プラス穴の角度は互いに45度ずれており、グリップは端部からやや中央部よりで直角に曲がっており、縦延長用シャフトをあらゆる角度から回転させることが可能な形状の縦延長用スパナ。This is a wrench used to extend the longitudinal direction with the alveolar bone extender, and has plus holes at both ends of the grip so that it can be inserted into the tip of the longitudinal extension shaft that has been machined into a minus projection. Are 45 degrees offset from each other, and the grip is bent at a right angle from the end slightly from the center, so that the vertical extension shaft can be rotated from any angle.
JP2002339856A 2002-11-22 2002-11-22 Alveolar bone extender Pending JP2004173708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002339856A JP2004173708A (en) 2002-11-22 2002-11-22 Alveolar bone extender

Publications (1)

Publication Number Publication Date
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Family Applications (1)

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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006020245A2 (en) 2004-07-19 2006-02-23 Synthes (U.S.A.) Bone distraction apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006020245A2 (en) 2004-07-19 2006-02-23 Synthes (U.S.A.) Bone distraction apparatus
EP1773222A2 (en) * 2004-07-19 2007-04-18 Synthes GmbH Bone distraction apparatus
EP1773222A4 (en) * 2004-07-19 2011-03-09 Synthes Gmbh Bone distraction apparatus

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