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JPS62201825A - Remedy for osteopathy - Google Patents

Remedy for osteopathy

Info

Publication number
JPS62201825A
JPS62201825A JP61043632A JP4363286A JPS62201825A JP S62201825 A JPS62201825 A JP S62201825A JP 61043632 A JP61043632 A JP 61043632A JP 4363286 A JP4363286 A JP 4363286A JP S62201825 A JPS62201825 A JP S62201825A
Authority
JP
Japan
Prior art keywords
bone
remedy
calcification
insulin
osteopathy
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.)
Granted
Application number
JP61043632A
Other languages
Japanese (ja)
Other versions
JP2604135B2 (en
Inventor
Nobuyuki Miyajima
宮島 信幸
Kenji Namita
波多 賢治
Moriaki Higo
盛明 肥後
Toshiyuki Saotome
早乙女 俊行
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.)
Lion Corp
Original Assignee
Lion Corp
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 Lion Corp filed Critical Lion Corp
Priority to JP61043632A priority Critical patent/JP2604135B2/en
Publication of JPS62201825A publication Critical patent/JPS62201825A/en
Application granted granted Critical
Publication of JP2604135B2 publication Critical patent/JP2604135B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Dental Preparations (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Medicinal Preparation (AREA)
  • Materials For Medical Uses (AREA)

Abstract

PURPOSE:To obtain a remedy for osteopathy, having bone resorption-suppressing effect and excellent bone calcification activity and useful especially for the remedy of osteopathy at periodontal part, by compounding a calcification promoter such as insulin, protamine, chondroitin sulfate, etc., and an osteoanaplerotic material. CONSTITUTION:The objective remedy for osteopathy contains (A) a calcification promotor selected from insulin, protamine, chondroitin sulfate, heparin, hyaluronic acid, dextran sulfate, their salts and vitamin K and (B) a water-soluble osteroanaplerotic material which is solid at normal temperature (preferably a calcium phosphate-type anaplerotic material such as hydroxyapatite, etc.). The component A is preferably chondroitin sulfate. The remedy has high stability, excellent biocompatibility, bone-resorption suppressing effect and excellent calcification effect and applicable without causing side effect. It is effective against osteoporosis, Behcet disease and especially periodontal diseases in which osteoanagenesis is hopless.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、骨疾患、例えば前孔症、ベーチェット病、リ
ュウマチ関節炎、骨折、骨移植、歯周病等の治療に用い
られる桑剤に関するものであり、特に骨の石灰化作用を
促進させ、骨の強度向上及び修復作用を有する温血動物
用の骨疾患治療剤に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mulberry agent used for the treatment of bone diseases, such as proforamia, Behcet's disease, rheumatoid arthritis, bone fractures, bone transplants, periodontal disease, etc. In particular, the present invention relates to a therapeutic agent for bone diseases for warm-blooded animals that promotes bone calcification, improves bone strength, and has repair effects.

〔従来の技術〕[Conventional technology]

これまでに、骨疾患の治療に関して種々の検討が行なわ
れている。例えば、同化ステロイド、エストロゲン、ポ
リリン酸塩、活性型ビタミンD3誘導体、プロスタグラ
シン類、バラサイロイドホルモン(P T H)、フッ
化物、カルントニン、芳香族カルボン酸類などである。
Up to now, various studies have been conducted regarding the treatment of bone diseases. Examples include anabolic steroids, estrogens, polyphosphates, active vitamin D3 derivatives, prostaglasins, barathyroid hormone (P T H), fluoride, cartonin, aromatic carboxylic acids, and the like.

しかしながら、同化ステロイド、エストロゲンは副作用
が強<、ホIJ IJン酸塩は副作用が強い上に、骨吸
収抑制作用しか示さないという欠点がある。又、活性型
ビタミンD 3 J導体、プロスタグラシン類、パラサ
イロイドホルモンは、局所的には骨吸収作用を示し、石
灰化と相反する作用を有しており、使用がむずかしい。
However, anabolic steroids and estrogens have strong side effects, and IJ salts have strong side effects and have the disadvantage of only exhibiting a bone resorption inhibitory effect. In addition, active vitamin D 3 J conductors, prostaglasins, and parathyroid hormones locally exhibit bone resorption action, which has an action contrary to calcification, making them difficult to use.

フッ化物及びカルシトニンは、骨吸収抑制作用のみを有
し、芳香族カルボン酸類は、骨吸収抑制作用と石灰化作
用とを有するが、石灰化作用が低いという欠点がある。
Fluoride and calcitonin only have an effect of inhibiting bone resorption, and aromatic carboxylic acids have an effect of inhibiting bone resorption and a calcification effect, but they have the disadvantage of having a low calcification effect.

一方、骨吸収抑制作用や石灰化作用を有する物質とは異
なり、アルミナ、ハイドロキシアパタイト、第三リン酸
カルシウム、シリカ、カーボン、合金等の不溶性の物質
を骨の機械的補強材として用いることも行なわれている
が、これらは生体適合性が低く骨疾患治療効果は十分と
はいえなかった。
On the other hand, unlike substances that have bone resorption inhibitory or calcifying effects, insoluble substances such as alumina, hydroxyapatite, tricalcium phosphate, silica, carbon, and alloys have also been used as mechanical reinforcement materials for bones. However, these have low biocompatibility and are not sufficiently effective in treating bone diseases.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従って、本発明は、安定性が高く副作用がないとともに
生体適合性にすぐれ、かつ骨吸収抑制作用とすぐれた石
灰化作用とを有する温血動物用の骨疾患治療剤を提供す
ることを目的とする。
Therefore, an object of the present invention is to provide a therapeutic agent for bone diseases for warm-blooded animals that is highly stable, has no side effects, has excellent biocompatibility, and has bone resorption inhibitory and calcifying effects. do.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、石灰化促進作用を有する特定の物質と特定の
骨補填材とを併用すると、骨補填材により機械的強度の
向上と空間的スペースの確保が図られるうえに石灰化促
進剤により骨形成が促進されることによってそれぞれ単
独では得られないようなすぐれた骨疾患治療効果を得る
ことができ、上記問題点を有効に解決できるとの知見に
基づいてなされたのである。
The present invention shows that when a specific substance that has a calcification promoting effect is used in combination with a specific bone grafting material, the bone grafting material improves mechanical strength and secures spatial space, and the mineralization accelerating agent improves bone grafting. This was done based on the knowledge that by promoting the formation of these drugs, it is possible to obtain excellent therapeutic effects for bone diseases that cannot be obtained by each method alone, and that the above-mentioned problems can be effectively solved.

すなわち、本発明は、囚インシュリン、プロタミン、為
コンドロイチン硫酸、ヘパリン、ヒアルロン酸、デキス
トラン硫酸、これらの塩及びビタミンにの群から選ばれ
る少なくとも1種の有効成分とe)水不溶性で常温で固
体の骨補填材とを含をすることを特徴とする骨疾患治療
剤を提供する。
That is, the present invention provides at least one active ingredient selected from the group consisting of insulin, protamine, chondroitin sulfate, heparin, hyaluronic acid, dextran sulfate, salts thereof, and vitamins, and e) a water-insoluble and solid at room temperature. Provided is a therapeutic agent for bone diseases characterized by containing a bone filling material.

本発明で用いる成分図は石灰化促進作用を有するもので
ある。成分図のうち、インシュリン及びその製剤として
はインシュリン、インシュリン亜鉛水性懸濁液、イソフ
ェンインシュリン水性懸濁液、結晶性インシュリン亜鉛
水性懸濁液、二相性インシュリン水性懸濁液、ブタ精製
中性インシュリン、プロタミンインシュリン亜鉛水性懸
濁液、無品性インシュリン亜鉛水性懸濁液等であり、特
に好ましくは、プロタミンインシュリン亜鉛水性懸濁液
をあげることができる。又、本発明において用いられる
プロタミン及びその塩としては、プロタミン及びその塩
酸塩、硫酸塩等である。
The composition diagram used in the present invention has a calcification promoting effect. In the composition diagram, insulin and its preparations include insulin, insulin zinc aqueous suspension, isophene insulin aqueous suspension, crystalline insulin zinc aqueous suspension, biphasic insulin aqueous suspension, and purified porcine neutral insulin. , protamine-insulin-zinc aqueous suspension, non-grade insulin-zinc aqueous suspension, etc. Particularly preferred is protamine-insulin-zinc aqueous suspension. In addition, protamine and its salts used in the present invention include protamine, its hydrochloride, sulfate, and the like.

本発明に用いられるコンドロイチン硫酸及びその塩とし
ては、コンドロイチン硫酸A、コンドロイチン硫酸B1
コンドロイチン硫酸C及びコンドロイチンポリ硫酸とそ
れらのナトリウム塩、カルシウム塩等があげられる。ヘ
パリン及びその塩としては、ヘパリン、ヘパリンナトリ
ウム、ヘパリンナトリウム注射液、ヘパリンカルシウム
等である。ヒアルロン酸及びその塩としては、ヒアルロ
ン酸及びそのす) IJウム塩、カルシウム塩があげら
れる。
Chondroitin sulfate and its salts used in the present invention include chondroitin sulfate A, chondroitin sulfate B1
Examples include chondroitin sulfate C, chondroitin polysulfate, and their sodium salts and calcium salts. Examples of heparin and its salts include heparin, heparin sodium, heparin sodium injection, heparin calcium, and the like. Examples of hyaluronic acid and its salts include hyaluronic acid and its salts, and calcium salts.

デキストラン硫酸及びその塩としては、分子量500か
ら50. OOOのデキストランの部分的硫酸エステル
(硫黄台ff11〜30%)及びそのナトリウム塩、カ
ルシウム塩等があげられる。
Dextran sulfate and its salts have a molecular weight of 500 to 50. Partial sulfate esters of OOO dextran (sulfur level ff 11 to 30%) and their sodium salts, calcium salts, etc. can be mentioned.

ビタミンにとしてはビタミンK l  、ビタミンに2
及びビタミンに3 が例示される。
Vitamin Kl, vitamin 2
and 3 are exemplified by vitamins.

本発明では上記囚成分の1種又は2種以上の混合物を使
用する。この際、上記(A)成分のうち、特にコンドロ
イチン硫酸塩を用いるのが好ましい。
In the present invention, one type or a mixture of two or more of the above-mentioned prison components is used. At this time, it is particularly preferable to use chondroitin sulfate among the components (A).

本発明において、e)成分として用いる骨補填材として
は、上記の各骨補填材であって、水不溶性(例えば20
℃における水への溶解度が0.05%以下)で常温(5
0℃以下で)で固体の化合物であり、具体的には、次の
ものが例示される。アルミナ、水酸化アルミニウムなど
のアルミニウム系骨補填材、ハイドロキシアパタイト、
フッ素アパタイト、塩素アパタイト、カルシウムアパタ
イト、α型第三リン酸カルシウム、β型第三リン酸カル
シウム、メタリン酸カルシウム等のリン酸カルシウム系
骨補填材、二酸化ケイ素、磁器、ガラス等のシリカ系骨
補填材、カーボン、ポリスチレン、ポリエチレン、ポリ
プロピレン等の有機系補填材、コバルト−クロム合金、
ニッケルーコバルト合金、金、銀、プラチナ、ステンレ
ス、チタニウム合金等の金属系骨補填材があげられる。
In the present invention, the bone grafting material used as component e) is each of the above-mentioned bone grafting materials, and is water-insoluble (for example, 20
Solubility in water at ℃ is 0.05% or less) at room temperature (5 ℃)
It is a compound that is solid at temperatures below 0°C), and specifically, the following are exemplified. Aluminum-based bone grafting materials such as alumina and aluminum hydroxide, hydroxyapatite,
Calcium phosphate bone grafting materials such as fluoroapatite, chlorapatite, calcium apatite, α-type tribasic calcium phosphate, β-type tribasic calcium phosphate, and calcium metaphosphate, silica-based bone grafting materials such as silicon dioxide, porcelain, and glass, carbon, polystyrene, and polyethylene. , organic fillers such as polypropylene, cobalt-chromium alloys,
Examples include metal bone grafting materials such as nickel-cobalt alloy, gold, silver, platinum, stainless steel, and titanium alloy.

本発明では、上記(B)成分の1種又は2種以上の混合
物を使用する。この際、上記(B)成分のうち、特にハ
イドロキシアパタイトなどのリン酸カルシウム系骨補填
材を用いるのが好ましい。又、成分(B)の形態は粉状
、粒状等いずれでもよい。
In the present invention, one type or a mixture of two or more of the above-mentioned component (B) is used. At this time, it is particularly preferable to use a calcium phosphate bone grafting material such as hydroxyapatite among the components (B). Moreover, the form of component (B) may be either powdery or granular.

本発明の骨疾患治療剤は、疾患部位への外科的手術によ
る充填投与の方法により用いるのが好ましく、特に歯周
部位の骨疾患治療に有用である。
The therapeutic agent for bone diseases of the present invention is preferably used by a method of surgically filling the diseased site, and is particularly useful for treating periodontal bone diseases.

投与量としては、体重1 kg当り、インシュリンでは
0.01〜20単位くU)、好ましくは0.1〜1単位
(U)であり、プロタミンでは0.001〜100mg
、好ましくは0.1〜20mgである。コンドロイチン
硫酸、ヘパリン、ヒアルロン酸、テストラン硫酸では0
.01〜1000mg、好ましくは1〜200mgであ
る。なお、これらの塩については、J離の形でその投与
量が上記の範囲となるようにするのがよい。ビタミンに
では0.001〜100mg、好ましくは0.1〜20
mgである。
The dosage is 0.01 to 20 units (U) per kg of body weight for insulin, preferably 0.1 to 1 unit (U), and 0.001 to 100 mg for protamine.
, preferably 0.1 to 20 mg. 0 for chondroitin sulfate, heparin, hyaluronic acid, and Testolan sulfate
.. 01 to 1000 mg, preferably 1 to 200 mg. In addition, it is preferable that these salts be administered in the form of J-isolates so that the dosage falls within the above-mentioned range. For vitamins 0.001 to 100 mg, preferably 0.1 to 20
mg.

本発明に用いられる骨補填材の投与量は特に限定はない
が、通常体重1 kg当り1mg〜10g用いられる。
The dosage of the bone grafting material used in the present invention is not particularly limited, but is usually 1 mg to 10 g per 1 kg of body weight.

本発明の骨疾患治療剤は、成分(B)の骨補填材に成分
囚を水溶液または無毒性溶媒希釈液の形で含浸させるか
、成分(B)と成分(A)とを粉末状で混合するか、成
分(B)の表面に成分(〜を付着させるかのいずれかの
方法を採ることができる。成分(A)と成分(B)の使
用比率囚/(B)は1/10,000,000〜1/l
であり、好ましくはl/10[)、000〜1/100
(重量比〉である。
The therapeutic agent for bone diseases of the present invention is prepared by impregnating the bone grafting material of component (B) with the component in the form of an aqueous solution or a diluted solution in a non-toxic solvent, or by mixing component (B) and component (A) in powder form. Alternatively, the component (~) can be attached to the surface of component (B).The usage ratio of component (A) and component (B)/(B) is 1/10, 000,000~1/l
and preferably l/10 [), 000 to 1/100
(weight ratio).

本発明の骨疾患治療剤には、さらに製剤化(安定化)の
ためにグリセリン、ソルビトール、プロピレングリコー
ル、ポリエチレングリコール、デキストラン、メチルセ
ルロース、ヒドロキシエチルセルロース、カルボキシメ
チルセルロース、ゼラチン、アルギン酸塩、トラガント
、ペクチン、アラビアゴム、可溶性デンプン等を添加す
ることができる。
The therapeutic agent for bone diseases of the present invention further includes glycerin, sorbitol, propylene glycol, polyethylene glycol, dextran, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, gelatin, alginate, tragacanth, pectin, arabic acid, etc. for formulation (stabilization). Rubbers, soluble starches, etc. can be added.

本発明で用いる成分囚及び(B)は安全性の高いもので
ある。
Ingredients and (B) used in the present invention are highly safe.

表−1に安全性のデータに示す。Table 1 shows the safety data.

〔発明の効果〕〔Effect of the invention〕

本発明の骨疾患治療剤によれば、骨補填材により、骨疾
患部の空間的スペースが確保され、骨形成を司る骨芽細
胞が骨欠損表面に配列し易くなり、同時に用いられる石
灰化促進剤により骨芽細胞が活性化され骨基質の形成及
び骨の石灰化が促進されて、骨の強度向上及び修復作用
が行なわれるので、管孔症、ベーチェット病、リューマ
チ関節炎、骨折、骨移植、歯周病等の骨疾患に対してす
ぐれた効果を発揮するものである。このうちでも歯槽膿
漏や抜歯により減少した歯槽骨の補修(人工歯槽骨)や
歯牙の代替(人工歯根、人工歯冠等)を要する様な骨の
再形成の望めない歯周病に対しては、特に効果的である
According to the therapeutic agent for bone diseases of the present invention, the bone substitute material secures a spatial space in the bone disease area, facilitates the arrangement of osteoblasts in charge of bone formation on the surface of the bone defect, and promotes mineralization that is used at the same time. The agent activates osteoblasts, promotes bone matrix formation and bone mineralization, improves bone strength and performs repair actions, so it can be used to treat canal disease, Behcet's disease, rheumatoid arthritis, bone fractures, bone grafts, etc. It exhibits excellent effects on bone diseases such as periodontal disease. Among these, for periodontal diseases in which bone regeneration cannot be expected, such as those that require repair of alveolar bone reduced due to alveolar pyorrhea or tooth extraction (artificial alveolar bone) or tooth replacement (artificial tooth root, artificial tooth crown, etc.) is particularly effective.

次に実施例により本発明を具体的に説明するが、本発明
はこれらに限定されるものではない。
EXAMPLES Next, the present invention will be specifically explained with reference to Examples, but the present invention is not limited thereto.

実施例1 酸化アルミニウム(半井化学薬品■製・細胞磨砕用)2
0mgと牛インシュリン(Sigma社製l−5500
)水溶液(1単位/miり0.1−をよく混合して、本
発明の骨疾患治療剤を調製した。次に体重200gのラ
ット10匹の左右大腿骨の中心部にそれぞれ直径l m
mの穴をドリルであけ、片足側の穴に上記治療剤20m
gを埋め込んだ。もう一方の足側の穴に酸化アルミニウ
ムのみ20mgを埋め込んだ。これらのラットを1週間
飼育後と殺し、欠損部を含む大腿骨の横断片をとり出し
アルコールで脱水処理後、スチレンモノマーで透徹し、
ポリエステルレジンを十分に含浸させて、重合開始剤を
加えて重合させ、埋込み部分を固定した。
Example 1 Aluminum oxide (manufactured by Hani Chemical Co., Ltd., for cell grinding) 2
0mg and bovine insulin (Sigma l-5500)
) aqueous solution (1 unit/mm) was thoroughly mixed to prepare the bone disease therapeutic agent of the present invention.Next, a diameter of 1 m was placed at the center of the left and right femurs of 10 rats weighing 200 g.
Drill a hole with a diameter of m, and add 20m of the above therapeutic agent into the hole on one leg side.
embedded g. 20 mg of aluminum oxide alone was embedded in the hole on the other leg side. After raising these rats for one week, they were sacrificed, and the lateral fragment of the femur including the defect was removed, dehydrated with alcohol, and then transparentized with styrene monomer.
After sufficiently impregnating the polyester resin, a polymerization initiator was added and polymerized to fix the embedded portion.

これから欠損部を含む厚さ約60μmの横断研磨片を作
製し、マイクロラジオグラフを撮影した。
A cross-sectional polished piece with a thickness of approximately 60 μm including the defect portion was prepared from this, and a microradiograph was taken.

判定は同一ラットごとに、マイクロラジオグラフで骨形
成度合を比較した。その結果を次に示す。
Judgment was made by comparing the degree of bone formation in each rat using a microradiograph. The results are shown below.

結  果 同     等                 2
この結果から、本発明によれば骨形成が効果的に行なわ
れていることがわかる。
Same result 2
This result shows that bone formation is effectively performed according to the present invention.

実施例2 コンドロイチン硫酸Aナトリウム(生化学工業@製)を
カチオン交換樹脂で酸型とし、水酸化カルシウムでカル
シウム塩(pH6,5〜7.0 ’)、としたものの乾
燥品2mgを第三リン酸カルシウム(純正化学(483
製)10mgとよく混合して骨疾患治療剤を調製した。
Example 2 2 mg of a dry product of sodium chondroitin sulfate A (manufactured by Seikagaku Kogyo@) made into an acid form with a cation exchange resin and made into a calcium salt (pH 6.5 to 7.0') with calcium hydroxide was added to tribasic calcium phosphate. (Junsei Chemical (483
A therapeutic agent for bone diseases was prepared by mixing well with 10 mg of the following products.

又、比較用に第三リン酸カルシウムを用いたほかは、実
施例1と同様にして骨形成効果を調べた。結果を次に示
す。
In addition, the osteogenic effect was investigated in the same manner as in Example 1, except that tricalcium phosphate was used for comparison. The results are shown below.

結  果 同   等                  1実
施例3 二酸化ケイ、累(関東化学@裂、JIS特級)15mg
と硫酸ブロタミ7 (Sigma社製、P−4020)
in+gをよく混合して骨疾患治療剤を調製した。
Results are the same 1 Example 3 Silicon dioxide, 15mg (Kanto Kagaku@Cabi, JIS special grade)
and Brotami sulfate 7 (manufactured by Sigma, P-4020)
A therapeutic agent for bone diseases was prepared by thoroughly mixing in+g.

又、比較のために二酸化ケイ素を用いたほかは、実施例
1と同様にして骨形成効果を調べた。結果を次に示す。
In addition, the osteogenic effect was investigated in the same manner as in Example 1, except that silicon dioxide was used for comparison. The results are shown below.

同    等                   
 に酸化ケイ累投与部 の方が骨形成蚤が多い      1 実施例4 ポリスチレン−2%ジビニルベンゼンコポリマービーズ
(関東化学■製)1mgとビタミンに2製剤ケーツー■
 (エーザイ製、10mg/m)0.1mlをよく混合
して骨疾患治療剤を調製した。
Equivalent
There are more bone-forming fleas in areas where silicon oxide is repeatedly administered. 1 Example 4 1 mg of polystyrene-2% divinylbenzene copolymer beads (manufactured by Kanto Kagaku ■) and 2 preparations of vitamins K-2 ■
(manufactured by Eisai, 10 mg/m) were mixed well to prepare a therapeutic agent for bone diseases.

又、比較のためにポリスチレンジビニルベンゼンコボリ
マービーズを用いたほかは実施例1と同様にして骨形成
効果を調べた。結果を次に示す。
In addition, the osteogenic effect was investigated in the same manner as in Example 1, except that polystyrene divinylbenzene copolymer beads were used for comparison. The results are shown below.

結  果result

Claims (2)

【特許請求の範囲】[Claims] (1)(A)インシュリン、プロタミン、コンドロイチ
ン硫酸、ヘパリン、ヒアルロン酸、デキストラン硫酸、
これらの塩及びビタミンKの群から選ばれる少なくとも
1種の有効成分と(B)水不溶性で常温で固体の骨補填
材とを含有することを特徴とする骨疾患治療剤。
(1) (A) Insulin, protamine, chondroitin sulfate, heparin, hyaluronic acid, dextran sulfate,
A therapeutic agent for bone diseases characterized by containing at least one active ingredient selected from the group of these salts and vitamin K, and (B) a water-insoluble bone grafting material that is solid at room temperature.
(2)口腔疾患を対象とする特許請求の範囲第(1)項
記載の治療剤。
(2) The therapeutic agent according to claim (1), which targets oral diseases.
JP61043632A 1986-02-28 1986-02-28 Oral bone disease treatment Expired - Lifetime JP2604135B2 (en)

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