JPH0761861A - Production of sintered apatite carbonate - Google Patents

Production of sintered apatite carbonate

Info

Publication number
JPH0761861A
JPH0761861A JP5211284A JP21128493A JPH0761861A JP H0761861 A JPH0761861 A JP H0761861A JP 5211284 A JP5211284 A JP 5211284A JP 21128493 A JP21128493 A JP 21128493A JP H0761861 A JPH0761861 A JP H0761861A
Authority
JP
Japan
Prior art keywords
carbonate
apatite
temperature
powder
carbonate apatite
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
JP5211284A
Other languages
Japanese (ja)
Other versions
JP3308355B2 (en
Inventor
Yoshiko Suwa
佳子 諏訪
Hideo Sakano
英夫 阪野
Hajime Saito
肇 斎藤
Yutaka Doi
豊 土井
Yutaka Moriwaki
豊 森脇
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.)
KYORITSU CERAMIC MATERIALS
KYORITSU YOGYO GENRYO KK
S T K CERAMICS KENKYUSHO KK
STK Ceramics Laboratory Corp
Original Assignee
KYORITSU CERAMIC MATERIALS
KYORITSU YOGYO GENRYO KK
S T K CERAMICS KENKYUSHO KK
STK Ceramics Laboratory Corp
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Filing date
Publication date
Application filed by KYORITSU CERAMIC MATERIALS, KYORITSU YOGYO GENRYO KK, S T K CERAMICS KENKYUSHO KK, STK Ceramics Laboratory Corp filed Critical KYORITSU CERAMIC MATERIALS
Priority to JP21128493A priority Critical patent/JP3308355B2/en
Publication of JPH0761861A publication Critical patent/JPH0761861A/en
Application granted granted Critical
Publication of JP3308355B2 publication Critical patent/JP3308355B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To easily and economically obtain a sintered apatite carbonate having a carbonate group content comparable to the content in a hard bio-tissue and having high mechanical strength sufficient for the use as a filling material for organism such as bone, dental, filling and prosthetic material. CONSTITUTION:Apatite carbonate powder having a carbonate group content of 5-30wt.%, an average particle diameter of <=5mum and a BET value of 10-50m<2>/g is sintered at 600-850 deg.C.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【技術分野】本発明は、炭酸アパタイト焼結体の製造方
法に係り、特に生体硬組織中の炭酸基含有量に略匹敵す
る炭酸基を含有せしめてなる、生体親和性に優れた緻密
質の炭酸アパタイト焼結体を有利に製造する方法に関す
るものである。
TECHNICAL FIELD The present invention relates to a method for producing a carbonated apatite sintered body, and in particular, it contains a carbonate group substantially equivalent to the carbonate group content in a living body hard tissue, which is a dense substance excellent in biocompatibility. The present invention relates to a method for advantageously producing a carbonated apatite sintered body.

【0002】[0002]

【背景技術】従来から、炭酸アパタイト、換言すれば炭
酸基を含有するハイドロキシアパタイトとしては、ハイ
ドロキシアパタイト{Ca10(PO4)6(OH)2}の水酸
基(OH- ) の一部を炭酸基(CO3 2- ) にて置換せし
めてなるAタイプと、そのリン酸基(PO4 3- ) の一部
を同様に炭酸基にて置換してなるBタイプとがあること
が知られている。そして、そのうちのAタイプの炭酸ア
パタイトは、ハイドロキシアパタイト(HAp)を(炭
酸ガス+水蒸気)雰囲気中で1000℃の温度で焼成す
ることによって合成され、また一方、Bタイプの炭酸ア
パタイトは、各種当該塩類を用いて、湿式法によって合
成されている。
BACKGROUND ART Conventionally, as carbonate apatite, in other words, as a hydroxyapatite containing a carbonate group, a part of the hydroxyl group (OH ) of hydroxyapatite {Ca 10 (PO 4 ) 6 (OH) 2 } is a carbonate group. It is known that there are an A type which is substituted with (CO 3 2- ) and a B type which is obtained by substituting a part of the phosphate group (PO 4 3- ) with a carbonate group in the same manner. There is. And, the A-type carbonate apatite among them is synthesized by firing hydroxyapatite (HAp) at a temperature of 1000 ° C. in an atmosphere of (carbon dioxide gas + steam), while the B-type carbonate apatite has various types. It is synthesized by a wet method using salts.

【0003】ところで、脊椎動物の硬組織の無機成分
は、灰分中のおよそ2%〜10%の炭酸基を含有する炭
酸アパタイトから成るものであることが知られている。
そして、歯のエナメル質は、主として上記したBタイプ
にAタイプが10〜20%程度混在しており、歯の象牙
質や骨は、上記Bタイプに近いと言われている。また、
Aタイプの炭酸アパタイトは、高温の固相反応で合成さ
れるため、かなりの高温でも安定であるが、Bタイプの
炭酸アパタイトは、高温では炭酸基が分解、脱離してし
まい、更に低温では焼結させることが難しいため、その
焼結体を得るためには、HIP(Hot Isosta
tic Press)やホットプレス、超高圧CIP
(Cold Isostatic Press)処理、
または高温下の炭酸ガス雰囲気中での焼成、等の特殊な
手法の採用が必要とされている。
By the way, it is known that the inorganic component of hard tissues of vertebrates is carbonate apatite containing about 2% to 10% of carbonic acid groups in ash.
The enamel of the tooth is mainly mixed with the above-described B type in the amount of about 10 to 20% of the A type, and the dentin and bone of the tooth are said to be close to the B type. Also,
Since A-type carbonate apatite is synthesized by a high temperature solid-state reaction, it is stable even at a considerably high temperature, but B-type carbonate apatite decomposes and desorbs a carbonate group at a high temperature and is burned at a lower temperature. Since it is difficult to bind them together, in order to obtain the sintered body, HIP (Hot Isosta
tic Press), hot press, ultra high pressure CIP
(Cold Isostatic Press) processing,
Alternatively, it is necessary to adopt a special method such as firing in a carbon dioxide gas atmosphere at high temperature.

【0004】しかしながら、それら炭酸アパタイトの焼
結体を得るための従来からの手法にあっては、何れも、
複雑な製法を採用するものであり、装置コストが高く、
量産も困難である等の欠点を内在するものであった。そ
して、そのような欠点のために、HApやTCP(リン
酸三カルシウム)に比べて、生体硬組織に近い炭酸アパ
タイトの方が、より生体親和性に優れているとされてい
るものの、炭酸アパタイトは、生体材料として、従来か
ら殆ど使用されていないのである。
However, in all of the conventional methods for obtaining such carbonate apatite sintered bodies,
Since it uses a complicated manufacturing method, the equipment cost is high,
It had some drawbacks such as difficulty in mass production. Due to such drawbacks, carbonate apatite, which is closer to biological hard tissue, is more excellent in biocompatibility than HAp or TCP (tricalcium phosphate), but carbonate apatite. Has been rarely used as a biomaterial.

【0005】[0005]

【解決課題】ここにおいて、本発明は、かかる事情を背
景にして為されたものであって、その課題とするところ
は、生体硬組織と同程度の炭酸基を含有し、生体の骨ま
たは歯牙充填材や補填材の如き生体充填材料として使用
するに充分な機械的強度を有する、生体親和性に優れた
炭酸アパタイト焼結体を、容易且つ有利に製造し得る手
法を提供することにある。
The present invention has been made in view of such circumstances, and a subject of the present invention is to contain a carbonic acid group at the same level as that of a hard tissue of a living body, and to make a bone or a tooth of a living body. It is an object of the present invention to provide a method capable of easily and advantageously producing a carbonated apatite sintered body having a mechanical strength sufficient to be used as a biofilling material such as a filler or a filling material and having excellent biocompatibility.

【0006】[0006]

【解決手段】そして、そのような課題解決のために、本
発明にあっては、炭酸基含有量が5〜30重量%であ
り、平均粒径が5μm以下、BET値が10〜50m2/
gである炭酸アパタイト粉末を用いて、600℃〜85
0℃の温度で焼結させるようにしたものであり、これに
よって、焼成後も炭酸基の脱離が少なく、緻密な焼結体
を比較的低温にて製造し得ることとなったのである。
In order to solve such a problem, in the present invention, the carbonic acid group content is 5 to 30% by weight, the average particle size is 5 μm or less, and the BET value is 10 to 50 m 2 /
Using carbonated apatite powder of g, 600 ° C-85
It was made to sinter at a temperature of 0 ° C., and by doing so, it was possible to produce a dense sintered body at a relatively low temperature with little desorption of carbonate groups even after firing.

【0007】[0007]

【具体的構成】このように、本発明は、炭酸アパタイト
粉末の粒径、比表面積(BET値)及び炭酸基含有量を
特定範囲内に制御することにより、その低温焼結性を高
め、以て600℃〜850℃の比較的低温下での焼結操
作にて、生体親和性に優れた、医療用または歯科用の緻
密質炭酸アパタイト焼結体を有利に与え得たものである
が、そのような特性を有する炭酸アパタイト粉末は、乾
式法や湿式法等の公知の各種の合成手法によって容易に
製造され得、その合成法が特に限定されるものではな
い。尤も、本発明にあっては、低温焼結性に優れた、湿
式法を用いて製造された炭酸アパタイト粉末を用いるこ
とが推奨され、またそのような湿式法における出発原料
は、特に限定されず、当該塩類であれば、何れをも用い
ることが可能である。
SPECIFIC STRUCTURE As described above, according to the present invention, the low temperature sinterability is enhanced by controlling the particle size, the specific surface area (BET value) and the carbonate group content of the carbonate apatite powder within the specific ranges. In a sintering operation at a relatively low temperature of 600 ° C. to 850 ° C., it is possible to advantageously give a dense carbonated apatite sintered body for medical or dental use, which is excellent in biocompatibility. The carbonate apatite powder having such characteristics can be easily produced by various known synthetic methods such as a dry method and a wet method, and the synthetic method is not particularly limited. However, in the present invention, it is recommended to use carbonate apatite powder excellent in low-temperature sinterability and manufactured by a wet method, and the starting material in such a wet method is not particularly limited. Any of these salts can be used.

【0008】なお、本発明において、目的とする炭酸ア
パタイト粉末を有利に得るための合成法として推奨され
る湿式法としては、代表的には(1)硝酸カルシウム四
水和物、リン酸水素ナトリウム、及び炭酸水素ナトリウ
ム若しくは炭酸ナトリウム、(2)酢酸カルシウム、リ
ン酸水素ナトリウム、及び炭酸水素ナトリウム若しくは
炭酸ナトリウム、(3)リン酸水素カルシウム、炭酸カ
ルシウム、及び水酸化カルシウム、(4)硝酸カルシウ
ム4水和物、リン酸水素アンモニウム、及び炭酸水素ア
ンモニウム若しくは炭酸アンモニウム、(5)酢酸カル
シウム、リン酸水素アンモニウム、及び炭酸水素アンモ
ニウム若しくは炭酸アンモニウム、(6)炭酸カルシウ
ムと、リン酸水素カルシウム二水和物またはリン酸水素
二カルシウム等を、反応せしめる方法がある。
In the present invention, the wet method recommended as a synthetic method for obtaining the desired carbonate apatite powder is typically (1) calcium nitrate tetrahydrate, sodium hydrogen phosphate. And sodium hydrogen carbonate or sodium carbonate, (2) calcium acetate, sodium hydrogen phosphate, and sodium hydrogen carbonate or sodium carbonate, (3) calcium hydrogen phosphate, calcium carbonate, and calcium hydroxide, (4) calcium nitrate 4 Hydrate, ammonium hydrogen phosphate, and ammonium hydrogen carbonate or ammonium carbonate, (5) calcium acetate, ammonium hydrogen phosphate, and ammonium hydrogen carbonate or ammonium carbonate, (6) calcium carbonate, and calcium hydrogen phosphate dihydrate Thing or dicalcium hydrogen phosphate There is a reaction allowed to method.

【0009】何れにしても、本発明に従う炭酸アパタイ
ト粉末を得るための出発原料としては、リン酸原料とし
てナトリウム塩、アンモニウム塩、カルシウム塩、また
はリン酸等が用いられ、また炭酸原料としてはカルシウ
ム塩、ナトリウム塩、アンモニウム塩、または二酸化炭
素等が用いられ、更にカルシウム原料としては、硝酸
塩、酢酸塩、炭酸塩、水酸化物、またはリン酸塩等が用
いられるのであり、更にハイドロキシアパタイト粉末等
も適宜に用いられて、それら配合成分を適宜に組み合わ
せて、従来からの合成手法に従って、目的とする炭酸ア
パタイト粉末が製造されるのである。
In any case, as a starting material for obtaining the carbonate apatite powder according to the present invention, sodium salt, ammonium salt, calcium salt, phosphoric acid or the like is used as a phosphoric acid raw material, and calcium is used as a carbonic acid raw material. Salt, sodium salt, ammonium salt, carbon dioxide or the like is used, and further, as the calcium raw material, nitrate, acetate, carbonate, hydroxide, phosphate or the like is used, and further hydroxyapatite powder or the like. Is also appropriately used, and these compounding ingredients are appropriately combined to produce the desired carbonate apatite powder according to a conventional synthesis method.

【0010】そして、本発明においては、かかる炭酸ア
パタイト粉末として、炭酸基含有量が5〜30重量%、
好ましくは6〜20重量%の範囲内にあるものが用いら
れることとなる。炭酸アパタイト粉末中の炭酸基含有量
が5重量%よりも少なくなると、本発明で採用される焼
成温度領域では、その緻密化が困難となるのであり、ま
た炭酸基含有量が30重量%を超える場合にあっては、
そのような炭酸基含有量の炭酸アパタイト粉末を得るこ
とが困難であるばかりでなく、生体親和性の点からして
も、好ましいものと言うことは出来ないのである。ま
た、低温焼結を可能ならしめるためには、炭酸アパタイ
ト粉末は、その平均粒径が5μm以下、好ましくは1.
0μm以下、比表面積を表すBET値が10〜50m2/
g、好ましくは20〜40m2/gである必要がある。炭
酸アパタイト粉末の平均粒径が、5μmよりも大きくな
ったり、BET値が10m2/gよりも小さくなったりす
ると、緻密な焼結体を得ることが困難となるのであり、
またBET値が50m2/gよりも大きくなると、成形の
操作性が悪く、また収縮が大きいためクラックが入り易
い等の問題を惹起することとなる。
In the present invention, the carbonate apatite powder has a carbonate group content of 5 to 30% by weight,
It is preferable to use the one in the range of 6 to 20% by weight. If the carbonate group content in the carbonate apatite powder is less than 5% by weight, it becomes difficult to densify it in the firing temperature range adopted in the present invention, and the carbonate group content exceeds 30% by weight. In some cases,
Not only is it difficult to obtain a carbonate apatite powder having such a carbonate group content, but it cannot be said to be preferable from the viewpoint of biocompatibility. Further, in order to enable low temperature sintering, the carbonate apatite powder has an average particle size of 5 μm or less, preferably 1.
0 μm or less, BET value representing the specific surface area is 10 to 50 m 2 /
It should be g, preferably 20-40 m 2 / g. If the average particle size of the carbonate apatite powder is larger than 5 μm or the BET value is smaller than 10 m 2 / g, it becomes difficult to obtain a dense sintered body.
If the BET value is more than 50 m 2 / g, the operability of molding is poor and the shrinkage is large, which causes problems such as easy cracking.

【0011】ところで、このような特性を有する炭酸ア
パタイト粉末が、湿式合成法等の適当な合成手法によっ
て直接に得られるのであれば、それを、そのまま用い
て、所定の形状に成形し、そして焼成することによっ
て、目的とする炭酸アパタイト焼結体を得ることが出来
るが、また合成された炭酸アパタイト粉末のBET値が
高すぎる場合には、適当な温度で予め仮焼することによ
って、そのBET値を本発明範囲内のものとした後、成
形・焼成しても良く、また逆に炭酸アパタイト粉末の粒
径が大きすぎたり、BET値が小さすぎたりした場合に
あっては、適当な粉砕操作を施して、本発明範囲内のも
のと為し、そしてそれを用いて成形・焼成することも可
能である。
By the way, if the carbonate apatite powder having such characteristics is directly obtained by an appropriate synthesis method such as a wet synthesis method, it is used as it is, molded into a predetermined shape, and fired. By doing so, it is possible to obtain the desired carbonate apatite sintered body, but if the synthesized carbonate apatite powder has a too high BET value, the BET value can be obtained by pre-calcination at an appropriate temperature. May be molded and fired within the range of the present invention. Conversely, if the carbonate apatite powder particle size is too large or the BET value is too small, a suitable crushing operation is performed. It is also possible to carry out the treatment within the scope of the present invention, and to use it for molding and firing.

【0012】そして、かかる本発明に従う炭酸アパタイ
ト粉末を用いて、目的とする炭酸アパタイト焼結体を製
造するに際しては、先ず、そのような炭酸アパタイト粉
末に対して、従来の焼結体の製造手法と同様に成形操作
が施され、所定形状の成形体とされた後、その得られた
成形体に対して焼成操作が施されるのである。なお、か
かる成形体は、例えば、炭酸アパタイト粉末を予備成形
した後、常法に従って加圧成形することにより作製さ
れ、例えばCIP成形の場合には1〜3トンのCIP圧
が採用されることとなる。また、焼結温度は、本発明に
従って、600℃〜850℃、好ましくは650〜80
0℃とされ、これによって、炭酸基残存量が元粉末の8
0%以上、相対密度が80%以上、3点曲げ強度が80
MPa以上、ヴィッカース硬さ4.0GPaの高強度緻
密質焼結体が得られるのである。
When the carbonated apatite powder according to the present invention is used to produce the desired carbonated apatite sintered body, first of all, the conventional sintered body production method is applied to the carbonated apatite powder. The molding operation is performed in the same manner as described above to obtain a molded article having a predetermined shape, and then the obtained molded article is fired. It should be noted that such a molded body is prepared, for example, by pre-molding carbonate apatite powder and then pressure-molding according to a conventional method. For example, in the case of CIP molding, a CIP pressure of 1 to 3 tons is adopted. Become. Also, the sintering temperature is according to the invention 600 ° C. to 850 ° C., preferably 650 to 80 ° C.
It was set to 0 ° C, and the residual amount of carbonic acid groups was 8
0% or more, relative density 80% or more, 3-point bending strength 80
Thus, a high-strength dense sintered body having a Vickers hardness of 4.0 GPa or more of MPa can be obtained.

【0013】かくして得られた炭酸アパタイト焼結体
は、生体硬組織中の炭酸基含有量に略匹敵する炭酸基を
含有すると共に、骨または歯牙用補填材や充填材として
要求されるに充分な機械的強度を有するものであって、
生体親和性に優れた医療用または歯科用材料として有用
なものであるが、そのような炭酸アパタイト焼結体は、
そのまま目的とする用途に用いられ得る他、所望に応じ
て顆粒や多孔体として用いられ得るものである。
The thus-obtained carbonate apatite sintered body contains a carbonate group substantially equivalent to the carbonate group content in the living body hard tissue, and is sufficient to be required as a bone or tooth filling material or filler. Having mechanical strength,
Although it is useful as a medical or dental material with excellent biocompatibility, such a carbonate apatite sintered body,
In addition to being used as it is for the intended purpose, it can be used as a granule or a porous body as desired.

【0014】[0014]

【実施例】以下に、本発明の代表的な実施例を示し、本
発明を更に具体的に明らかにすることとするが、本発明
が、そのような実施例の記載によって、何等の制約をも
受けるものでないことは、言うまでもないところであ
る。また、本発明には、以下の実施例の他にも、更には
上記の具体的記述以外にも、本発明の趣旨を逸脱しない
限りにおいて、当業者の知識に基づいて、種々なる変
更、修正、改良等を加え得るものであることが、理解さ
れるべきである。
EXAMPLES Hereinafter, representative examples of the present invention will be shown to clarify the present invention in more detail. However, the present invention is not limited by the description of such examples. Needless to say, it is not something to receive. In addition to the following embodiments, the present invention is not limited to the above specific description, and various changes and modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the present invention. It is to be understood that improvements, etc. can be added.

【0015】先ず、各種の炭酸アパタイト粉末を湿式合
成法により製造した。即ち、0.6モルリン酸水素ナト
リウム水溶液に、所定量の炭酸水素ナトリウムを溶解せ
しめてなる溶液5L(リットル)と、1モル酢酸カルシ
ウム水溶液の5Lとを、同時に、80℃の温度に保持さ
れたイオン交換水3L中に500mL/Hrの滴下速度
で滴下せしめた。その間、かかるイオン交換水のpHを
NaOHで9.0〜9.5の範囲内に制御した。そし
て、かかる滴下の終了の後、80℃の温度で12時間熟
成し、次いで濾過した後、Naイオンが検出されなくな
るまで洗浄を施した。そして、これによって得られた粉
末を110℃の温度で24時間乾燥し、そして樹脂ポッ
ト中で、5mmφのジルコニアボールを用いて、24時
間湿式粉砕せしめ、更に脱水、乾燥することにより、下
記表1に示される炭酸基含有量、平均粒径及びBET値
を有する各種の炭酸アパタイト粉末A〜Dを得た。ま
た、粉末Eは、粉末Aを110℃、24時間乾燥後、ポ
ットミル粉砕を行なわずに乳鉢で解砕し、80メッシュ
ふるいを通しただけの粉末である。
First, various carbonate apatite powders were manufactured by a wet synthesis method. That is, 5 L (liter) of a solution prepared by dissolving a predetermined amount of sodium hydrogen carbonate in a 0.6 mol sodium hydrogen phosphate aqueous solution and 5 L of a 1 mol calcium acetate aqueous solution were simultaneously held at a temperature of 80 ° C. It was added dropwise to 3 L of ion-exchanged water at a dropping rate of 500 mL / Hr. During that time, the pH of the ion-exchanged water was controlled with NaOH within the range of 9.0 to 9.5. After completion of the dropping, the mixture was aged at a temperature of 80 ° C. for 12 hours, filtered, and washed until Na ions were not detected. Then, the powder thus obtained was dried at a temperature of 110 ° C. for 24 hours, wet-milled in a resin pot with zirconia balls of 5 mmφ for 24 hours, further dehydrated and dried to obtain the following Table 1. Various carbonate apatite powders A to D having the carbonate group content, the average particle size and the BET value shown in Table 1 were obtained. Further, the powder E is a powder obtained by drying the powder A at 110 ° C. for 24 hours, crushing it in a mortar without pot mill crushing, and passing it through an 80-mesh sieve.

【0016】[0016]

【表1】 [Table 1]

【0017】次いで、かかる各種の炭酸アパタイト粉末
を用いて、それぞれ、成形用金型に充填し、予備成形し
た後、CIP圧:3トンにてCIP成形し、その得られ
た成形体に対して、大気中においてそれぞれ所定の焼成
温度にて焼成操作を施した。なお、焼成プログラムとし
ては、500℃までは2℃/分の割合で昇温し、5時間
保持した後、引き続き600℃〜900℃までの所定の
温度に1℃/分の割合で昇温し、そして目的とする温度
で5時間保持した後、500℃まで1℃/分の割合で降
温せしめ、引き続き300℃まで2℃/分の割合で降温
し、更に室温まで炉内放冷して、焼結体を得る手順を採
用した。かくして得られた各種の焼結体の相対密度を、
下記表2に示す。なお、ここでは、ハイドロキシアパタ
イトの理論密度:3.16g/cm3 を相対密度100
%とした。
Next, each of these carbonate apatite powders was filled in a molding die and preformed, and then CIP molding was carried out at a CIP pressure of 3 tons. The firing operation was performed at a predetermined firing temperature in the atmosphere. As a firing program, the temperature was raised up to 500 ° C. at a rate of 2 ° C./min, held for 5 hours, and subsequently raised to a predetermined temperature from 600 ° C. to 900 ° C. at a rate of 1 ° C./min. Then, after holding at the target temperature for 5 hours, the temperature was lowered to 500 ° C. at a rate of 1 ° C./min, then to 300 ° C. at a rate of 2 ° C./min, and further allowed to cool to room temperature in the furnace, The procedure for obtaining a sintered body was adopted. The relative densities of various sintered bodies thus obtained are
It is shown in Table 2 below. In addition, here, the theoretical density of hydroxyapatite: 3.16 g / cm 3 is relative density 100
%.

【0018】[0018]

【表2】 [Table 2]

【0019】また、炭酸アパタイト粉末Aを用いて得ら
れた焼結体の特性、即ち残存炭酸量、3点曲げ強度、破
壊靱性値、ヴィッカース硬さ、かさ密度について評価
し、その結果を、下記表3に示す。
Further, the characteristics of the sintered body obtained by using the carbonate apatite powder A, that is, the residual carbonic acid content, the 3-point bending strength, the fracture toughness value, the Vickers hardness, and the bulk density were evaluated, and the results are shown below. It shows in Table 3.

【0020】[0020]

【表3】 [Table 3]

【0021】以上の結果より明らかなように、本発明に
従う炭酸アパタイト粉末A及びBを用いたものにあって
は、600℃〜850℃の範囲内において有効な緻密体
が得られるのに対して、本発明の範囲外の特性を有する
炭酸アパタイト粉末C、D及びEにおいては、そのよう
な温度領域では、緻密化しないか、または全く焼結しな
いのである。即ち、炭酸アパタイト粉末C及びDの如
く、炭酸基含有量が少ない粉末の場合において、平均粒
径及びBET値は、炭酸アパタイト粉末A及びBと略同
様であっても、600℃〜900℃の温度範囲では緻密
化しないのである。また、炭酸アパタイト粉末Eの如
く、炭酸アパタイト粉末AやBと同様な炭酸基含有量:
10.90重量%を有していても、平均粒径やBET値
が、本発明で規定する範囲外となると、600℃〜90
0℃の温度範囲では全く焼結しないのである。
As is clear from the above results, with the carbonate apatite powders A and B according to the present invention, an effective dense body can be obtained in the range of 600 ° C to 850 ° C. In the carbonate apatite powders C, D and E having properties outside the scope of the present invention, they do not densify or sinter at all in such a temperature range. That is, in the case of powders having a low carbonate group content, such as carbonate apatite powders C and D, even if the average particle diameter and BET value are substantially the same as those of carbonate apatite powders A and B, 600 ° C to 900 ° C. It does not densify in the temperature range. Also, like carbonate apatite powder E, the same carbonate group content as carbonate apatite powder A and B:
Even if it has a content of 10.90% by weight, if the average particle diameter or the BET value is out of the range specified by the present invention, 600 ° C to 90 ° C.
It does not sinter at all in the temperature range of 0 ° C.

【0022】更にまた、本発明に従う炭酸アパタイト粉
末Aを用いて得られた焼結体にあっては、焼成温度が6
00℃〜850℃の範囲内において、何れも、優れた焼
結体特性を有するものであった。
Furthermore, in the sintered body obtained by using the carbonate apatite powder A according to the present invention, the firing temperature is 6
Within the range of 00 ° C to 850 ° C, all had excellent sintered body properties.

【0023】[0023]

【発明の効果】以上の説明から明らかなように、本発明
は、低温焼結性に優れた炭酸アパタイト粉末を使用して
比較的低温で焼結せしめ、目的とする炭酸アパタイト焼
結体を得るものであるところから、そのような炭酸アパ
タイト焼結体は、生体硬組織と同程度の炭酸基を含有
し、且つ生体硬組織と類似の構造を有する、極めて生体
親和性に優れた焼結体材料となるのであり、骨または歯
牙用充填材、補填材等として、極めて有用なものであ
る。
As is apparent from the above description, according to the present invention, carbonate apatite powder having excellent low-temperature sinterability is used for sintering at a relatively low temperature to obtain a desired carbonate apatite sintered body. Therefore, such a carbonated apatite sintered body is a sintered body having a carbonic acid group of the same degree as that of a living hard tissue and having a structure similar to that of a living hard tissue and having an extremely excellent biocompatibility. It is a material, and is extremely useful as a filling material for bones or teeth, a filling material, or the like.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 A61L 27/00 F (71)出願人 593158870 森脇 豊 和歌山県橋本市矢倉脇52−3 (72)発明者 諏訪 佳子 愛知県名古屋市港区築三町1丁目11番地 株式会社エス・ティー・ケー・セラミック ス研究所内 (72)発明者 阪野 英夫 愛知県名古屋市港区築三町1丁目11番地 株式会社エス・ティー・ケー・セラミック ス研究所内 (72)発明者 斎藤 肇 愛知県名古屋市港区築三町1丁目11番地 株式会社エス・ティー・ケー・セラミック ス研究所内 (72)発明者 土井 豊 岐阜県本巣郡穂積町祖父江81−20 (72)発明者 森脇 豊 和歌山県橋本市矢倉脇52−3─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification number Internal reference number FI Technical indication location A61L 27/00 F (71) Applicant 593158870 Moriwaki Yutaka 52-3 Yakurawaki, Hashimoto-shi, Wakayama (72) Inventor, Yoshiko Suwa, 11-1, Tsukisan-cho, Minato-ku, Nagoya, Aichi Prefecture STK Ceramics Laboratories, Inc. (72) Hideo Hanno 1-1-11, Tsukisan-cho, Minato-ku, Nagoya, Aichi Prefecture TK Ceramics Laboratory Co., Ltd. (72) Inventor Hajime Saito 1-1-11 Tsukisancho, Minato-ku, Nagoya, Aichi Prefecture TK Ceramics Laboratory Co., Ltd. (72) Inventor Doi Toyohashi, Hozumi-cho, Motosu-gun, Gifu Prefecture 81-20 Sobue (72) Inventor Yutaka Moriwaki 52-3 Yakurawaki, Hashimoto City, Wakayama Prefecture

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 炭酸基含有量が5〜30重量%であり、
平均粒径が5μm以下、BET値が10〜50m2/gで
ある炭酸アパタイト粉末を用いて、600℃〜850℃
の温度で焼結させることを特徴とする炭酸アパタイト焼
結体の製造方法。
1. The carbonic acid group content is 5 to 30% by weight,
Using a carbonate apatite powder having an average particle size of 5 μm or less and a BET value of 10 to 50 m 2 / g, 600 ° C. to 850 ° C.
A method for producing a carbonated apatite sintered body, which comprises sintering at a temperature of.
JP21128493A 1993-08-26 1993-08-26 Method for producing sintered carbonated apatite Expired - Fee Related JP3308355B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21128493A JP3308355B2 (en) 1993-08-26 1993-08-26 Method for producing sintered carbonated apatite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21128493A JP3308355B2 (en) 1993-08-26 1993-08-26 Method for producing sintered carbonated apatite

Publications (2)

Publication Number Publication Date
JPH0761861A true JPH0761861A (en) 1995-03-07
JP3308355B2 JP3308355B2 (en) 2002-07-29

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ID=16603389

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Country Status (1)

Country Link
JP (1) JP3308355B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8012218B2 (en) 2003-06-24 2011-09-06 Kyushu University, National University Corporation Medical bone prosthetic material and process for producing the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040010200A (en) 2002-07-15 2004-01-31 펜탁스 가부시키가이샤 CaO-SiO2-BASED BIOACTIVE GLASS AND SINTERED CALCIUM PHOSPHATE GLASS USING SAME
JP3793532B2 (en) 2003-10-14 2006-07-05 ペンタックス株式会社 CaO-MgO-SiO2 bioactive glass and sintered calcium phosphate using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8012218B2 (en) 2003-06-24 2011-09-06 Kyushu University, National University Corporation Medical bone prosthetic material and process for producing the same

Also Published As

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