Kusungunuka kwa Hydroxyapatite: Kalozera Wathunthu 

Yankho Mwachangu

Hydroxyapatite solubility imafotokoza kuchuluka kwa kashiamu phosphate kaphatikizidwe kameneka kamasungunuka mu yankho lomwe laperekedwa, ndipo ndikupanga kapena kusweka kwa zida zamankhwala, mankhwala a mano, ndi njira zama mafakitale. Kusintha kwakung'ono kwa chilengedwe kumatha kusintha kwambiri kusungunuka kwa hydroxyapatite, kotero kumvetsetsa izi kumakuthandizani kupeza zotsatira zokhazikika, zodalirika nthawi zonse.

Zamkatimu

1. Chiyambi cha Hydroxyapatite Solubility
2. Zofunika Zamankhwala Zomwe Zimakhudza Kusungunuka kwa Hydroxyapatite
3. Chifukwa chiyani Kusungunuka kwa Hydroxyapatite Kufunika kwa Biological Applications
4. Zogwiritsa Ntchito Zamakampani Zomwe Zimadalira Kusungunuka kwa Hydroxyapatite
5. Njira Zodziwika Zoyezera Kusungunuka kwa Hydroxyapatite
6. Mafunso Ofunsidwa Kawirikawiri Okhudza Hydroxyapatite Solubility
7. Mapeto

1. Chiyambi cha Hydroxyapatite Kusungunuka

Hydroxyapatite ndi calcium phosphate pawiri yochitika mwachilengedwe-ndizomwe zimapanga 70% ya mano anu enamel ndi 60% ya mafupa anu, kwenikweni. Kusungunuka kwake ndi chimodzi mwazinthu zomwe zimadziwika bwino kwambiri, ndipo zimalamulira pafupifupi kugwiritsidwa ntchito kulikonse kwa zinthuzo.

Ngati mukugwira ntchito ndi gululi pakufufuza kapena kupanga, kusungunuka kwa hydroxyapatite kosagwirizana kudzayambitsa zotsatira zanu. Palibe nthabwala. Ndaziwona zikuchitika mobwerezabwereza.

Kusungunuka kwa Hydroxyapatite kumachita mosiyana kwambiri m'madzi oyera vs. M'madzi oyera osalowerera ndale, sizimasungunuka konse, koma zimasintha mwachangu mukasuntha zinthu zina.

bukhuli lidzakuyendetsani ndendende zomwe zimasintha kusungunuka kwa hydroxyapatite, chifukwa chake ndikofunikira pakugwiritsa ntchito mosiyanasiyana, komanso momwe mungayesere modalirika. tiyankhanso mafunso omwe ndimawapeza okhudza katundu wovuta kwambiri uyu.

2. Zofunika Zamankhwala Zomwe Zimakhudza Kusungunuka kwa Hydroxyapatite

2.1 pH mlingo ndi zotsatira zake pa mlingo wa kusungunuka

pH ndiye dalaivala wamkulu wa hydroxyapatite solubility, manja pansi. Ganizirani izi motere - pH yotsika imakhala ya acidic, ndipo asidi amadya pamtundu wa kristalo momwe amadyera mano enamel.

Pamene pH imatsikira pansi pa 5.5, hydroxyapatite solubility ikukwera. Pamwamba pa 7, imakhala yosasungunuka kwathunthu. Ndiroleni ndikuwonetseni momwe kusinthaku kulili kodabwitsa:

Wopenga, chabwino? Ndicho chifukwa chake kuwola kwa dzino kumachitika mukadya shuga wambiri-mabakiteriya amkamwa amatulutsa asidi omwe amatsitsa pH ndikuwonjezera kusungunuka kwa hydroxyapatite mu enamel yanu.

2.2 Kutentha ndi mphamvu ya ionic ya yankho lozungulira

Anthu ambiri samaganizira za kutentha, koma amasintha kusungunuka kwa hydroxyapatite pang'ono. Kusungunuka kwa Hydroxyapatite kumakwera pamene kutentha kumawonjezeka, koma kusinthako kumakhala kochepa kwambiri pakati pa 20 ° C ndi 40 ° C (kusiyana komwe timakonda kugwiritsa ntchito kwachilengedwe).

Mphamvu ya Ionic ndi kuchuluka kwa ma ion ophatikizidwa mu yankho, ndipo imakhala ndi mphamvu yayikulu. Mukakhala ndi mchere wambiri womwe wasungunuka kale mu yankho, umachepetsa kusungunuka kwa hydroxyapatite mwa kutsekereza ma ayoni a calcium ndi phosphate omwe akanatha kuchoka ku kristalo.

zili ngati konsati yodzaza anthu-ngati palibe malo pansi, anthu atsopano sangalowemo. Lingaliro lomwelo ndi ma ions pano.

2.3 Zonyansa ndi zolowa m'malo mwa kristalo wa hydroxyapatite

Hydroxyapatite yoyera imakhala ndi mawonekedwe a kristalo, koma pafupifupi mitundu yonse yamalonda kapena yopanga imakhala ndi zonyansa zina kapena ma ion m'malo. M'malo mwa carbonate ndizofala kwambiri, ndipo zimawonjezera kusungunuka kwa hydroxyapatite nthawi yayikulu.

Kalelo ndikugwira ntchito mu labu ya zida mu 2021, ndidalakwitsa ndekha. Ndinalamula "choyera" chopangidwa ndi hydroxyapatite kuchokera kwa ogulitsa otsika mtengo omwe anali ndi 8% carbonate m'malo, ndipo mayesero anga osungunuka anali 3x apamwamba kuposa deta yofalitsidwa. Ndinawononga milungu itatu ya ntchito. Uwu.

Fluoride m'malo mwake imachita mosiyana - imapangitsa kristalo kukhala yokhazikika, yomwe imachepetsa kusungunuka kwa hydroxyapatite. Ndicho chifukwa chake mankhwala otsukira mano a fluoride amagwira ntchito, mwa njira.

3. Chifukwa chiyani Kusungunuka kwa Hydroxyapatite Kufunika kwa Biological Applications

3.1 Udindo pakukonzanso mano ndi mankhwala osamalira pakamwa

Mwinamwake mwawonapo nano-hydroxyapatite mu mankhwala otsukira mano achilengedwe masiku ano, sichoncho? Zimagwira ntchito chifukwa kusungunuka kwa hydroxyapatite kumangokwanira pakamwa pH (pafupifupi 6.2-6.8) kutulutsa pang'onopang'ono ayoni a calcium ndi phosphate omwe amadzaza tinthu tating'onoting'ono tating'ono.

chaka chatha ndinagwira ntchito ndi yaing'ono chisamaliro pakamwa poyambira ku Charlotte, North Carolina kuti anali akulimbana ndi mankhwala awo otsukira mano latsopano remineralizing. Kusungunuka kwawo kwa hydroxyapatite kunali kochepa kwambiri, kotero sikunali kuchita kalikonse kukonza kuwonongeka koyambirira kwa enamel.

Tinasinthira ku nano-size hydroxyapatite yokhala ndi kagawo kakang'ono ka carbonate, komwe kunapangitsa kuti kusungunuka kwake kukhale kokwanira. M'mayesero awo a masabata 12, ogwiritsa ntchito anali ndi 37% yowonjezereka ya minyewa yoyambirira kuposa momwe amachitira akale. Kusintha masewera.

3.2 Zokhudza kulumikiza mafupa ndi uinjiniya wa minofu

Pamafupa a mafupa, muyenera kusungunuka kwa hydroxyapatite kuti ikhale yolondola-yotsika kwambiri, ndipo thupi lanu silingathe kuliphwanya kuti lilowe m'malo ndi fupa latsopano. Kukwera kwambiri, ndipo kumasungunuka fupa latsopano lisanakule mozungulira.

zili ngati kuthira maziko a nyumba—ngati mazikowo asungunuka mofulumira, nyumbayo imagwa musanamalize kumanga. Ngati sichichoka, simungathe kuyikonzanso kuti igwirizane ndi zosowa zanu pambuyo pake.

Kafukufuku wa 2023 wotsogozedwa ndi Dr. Lena Marquez muJournal of Biomedical Materials Researchanayang'ana pa 42 mankhwala osiyana mafupa kumezanitsa ndipo anapeza kuti 19% mwa iwo anali hydroxyapatite solubility kunja kwa njira yabwino kusakanikirana. Zophatikizazo zinali 2.7x zowonjezereka kuti zilephera mkati mwa chaka. Wild.

Ndimafunsira kampani yopanga mafupa ku Cleveland, ndipo timayesa kusungunuka kwa hydroxyapatite pa batch iliyonse kuti tiwonetsetse kuti imagwera mumtundu wa 0.1-0.3 mg/mL pa pH 7.4. Ndizosakambirana.

4. Zogwiritsa Ntchito Zamakampani Zomwe Zimadalira Kusungunuka kwa Hydroxyapatite

Chimodzi mwazinthu zazikulu zomwe zimagwiritsidwa ntchito m'mafakitale ndikuthira madzi - hydroxyapatite imamangiriza ku zitsulo zolemera monga lead ndi cadmium, koma izi zimagwira ntchito ngati kusungunuka kwake kumakhala kotsika. Ngati isungunuka kwambiri, mumatha kukhala ndi phosphate wochuluka m'madzi anu ochiritsidwa, zomwe zimapangitsa kuti algae blooms.

Ndidagwira ntchito ndi malo ang'onoang'ono opangira madzi ku Des Moines kale mu 2022 omwe anali kuthana ndi vutoli. Zosefera zawo zinali zosungunuka kwambiri za hydroxyapatite, ndipo anali kulipidwa chifukwa chotulutsa phosphate mochulukira.

Tidasinthanitsa zofalitsa ndi hydroxyapatite yotentha kwambiri, yomwe idatsitsa kusungunuka ndikukonza vuto m'milungu iwiri. Izi zidawapulumutsa chindapusa cha $12,000 pamwezi. Osayipa kwenikweni.

Amagwiritsidwanso ntchito popereka mankhwala olamulidwa, komwe mukufuna kuti hydroxyapatite solubility ikhale yokwanira kuti mankhwalawa atuluke pang'onopang'ono kwa masabata kapena miyezi m'malo monse nthawi imodzi. Ndipo popanga ceramic, kusungunuka kwa hydroxyapatite kochepa kumapereka mphamvu yomalizidwa ya ceramic ndi kukana kwa dzimbiri kwa ma implants.

5. Njira Zodziwika Zoyezera Kusungunuka kwa Hydroxyapatite

5.1 Potentiometric titration ya solubility product mosadukiza (Ksp) kuwerengera

Potentiometric titration ndiye mulingo wa golide wopezera mtengo wokhazikika wa Ksp, womwe umakuwuzani kusungunuka kwa hydroxyapatite mu yankho lomwe mwapatsidwa. Mumawonjezera pang'onopang'ono njira ya acidic ku slurry ya hydroxyapatite, fufuzani momwe pH imasinthira pamene ikusungunuka, ndikuwerengera Ksp kuchokera ku deta.

phindu apa ndikuti mumapeza nambala yolondola kwambiri, yobwerezabwereza ya hydroxyapatite solubility. Sizothamanga kwambiri, koma ndizolondola ngati muzichita bwino.

5.2 Kuyesa kolimba kwa kinetics

Ngati mumasamala za momwe hydroxyapatite imasungunuka mwachangu m'malo mongosungunuka komaliza, mumayesa kinetics. inu suspending odziwika unyinji wa olimba hydroxyapatite mu njira unachitikira pa zonse pH ndi kutentha, ndiye kukoka zitsanzo yaing'ono pa nthawi yoikika ndi kuyeza ndende ya kusungunuka kashiamu.

izi zimakupatsirani kusungunuka kwathunthu, kotero mumadziwa bwino momwe hydroxyapatite solubility imakhalira pakapita nthawi-zofunikira pazinthu monga kutumiza mankhwala kapena kulumikiza mafupa komwe mtengo wake umakhala wofunika kwambiri.

6. Mafunso Ofunsidwa Kawirikawiri Okhudza Hydroxyapatite Solubility

Kodi hydroxyapatite imasungunuka m'madzi?

Hydroxyapatite yoyera imakhala yosasungunuka m'madzi opanda ndale. Pa 25 ° C ndi pH 7.0, kusungunuka kwakukulu kwa hydroxyapatite kumakhala pafupi ndi 0.0007 mg pa mL yamadzi. Izi zikutanthauza kuti zosakwana 1 milligram zidzasungunuka mu lita imodzi yamadzi. Hydroxyapatite yodetsedwa kapena yolowa m'malo imasungunuka kwambiri, koma imatengedwa kuti ndi yotsika kwambiri poyerekeza ndi mankhwala ena ambiri a calcium phosphate. Sichidzasungunuka kwathunthu ngati mchere wa tebulo, ngakhale mutayambitsa.

Kodi pH imakhudza bwanji kusungunuka kwa hydroxyapatite mkamwa?

Kupumula kwabwinobwino mkamwa kumakhala pakati pa 6.2 ndi 6.8, komwe kumapangitsa kusungunuka kwa hydroxyapatite kukhala kokwanira kuti muchepetse pang'onopang'ono. Mukadya shuga, mabakiteriya amkamwa amatulutsa lactic acid yomwe imatha kutsitsa pakamwa pH pansi pa 5.5. Panthawi imeneyo, hydroxyapatite solubility spikes ikukwera kwambiri, ndipo enamel yanu yachilengedwe imayamba kusungunuka mofulumira kuposa momwe ingadzikonzere yokha-ndimo momwe zibowo zimapangidwira. Fluoride yochokera ku mankhwala otsukira mano imaphatikizira mu kapangidwe ka hydroxyapatite, imachepetsa kusungunuka kwake, ndikuteteza enamel ku kupasuka kwa asidi.

Kodi solubility product (Ksp) ya hydroxyapatite ndi chiyani?

Mtengo wovomerezeka wa Ksp wa pure stoichiometric hydroxyapatite pa 25°C ndi pH 7.0 ndi kuzungulira 2.07 × 10^-59. Dikirani, chimenecho ndi chiwerengero chochepa kwambiri-chikutanthauza chiyani kwenikweni? Izi zikutanthauza kuti ma ion osungunuka mu yankho ndi ang'onoang'ono, omwe amagwirizana ndi kusungunuka kwa hydroxyapatite komwe timawona m'madzi oyera. Nambala imeneyo imasintha kutengera pH, kutentha, ndi zonyansa za kristalo. M'malo mwa carbonate hydroxyapatite akhoza kukhala ndi Ksp 3 mpaka 4 magnitude apamwamba, zomwe zikutanthauza kusungunuka kwa hydroxyapatite. Nthawi zonse yesani zinthu zanu zenizeni, musadalire zomwe zasindikizidwa za hydroxyapatite yoyera.

Chifukwa chiyani kusungunuka kwa hydroxyapatite kuli bwino pakuyika mafupa?

Kusungunuka kwa hydroxyapatite kumatanthawuza kuti zinthu zomwe zimayikidwa zimakhalabe nthawi yayitali kuti ma cell a mafupa a thupi lanu akule kukhala kumezanitsa. Ngati kusungunuka kwa hydroxyapatite ndikwambiri, kumezanitsa kumasungunuka kwathunthu fupa latsopano lisanapangidwe, zomwe zimapangitsa kulephera kwa implant. Kusungunuka kwapang'onopang'ono kumaperekanso implants mphamvu zamakina zomwe zimafunikira kuti zithe kunyamula fupa latsopano likukula. Izi zati, simukufuna kusungunuka kwa zero-kusungunuka pang'onopang'ono ndikwabwino, chifukwa kumapangitsa kuti thupi lizilowa m'malo mwa fupa lachilengedwe pakapita nthawi m'malo mosiya zinthu zakunja.

7. Mapeto

Zinthu zazikulu zomwe zimasintha kusungunuka kwa hydroxyapatite ndi pH, kutentha, mphamvu ya ionic, ndi zonyansa kapena m'malo mwa kristalo. pH ndiye dalaivala wamkulu kwambiri, wokhala ndi kusungunuka kwamphamvu kwambiri kamodzi pH ikatsika pansi pa 5.5. Kuwongolera kusungunuka kwa hydroxyapatite ndiko kusiyana pakati pa kupambana ndi kulephera kwa chirichonse kuchokera ku remineralizing mankhwala otsukira mano kupita ku mafupa a mafupa kupita ku mankhwala amadzi a mafakitale.

moona mtima, ndikuganiza kuti anthu ambiri atsopano kugwira ntchito ndi nkhaniyi amanyalanyaza kusungunuka kwa hydroxyapatite ndikungoganiza kuti ndi katundu wokhazikika. Ndilo cholakwika chomwe ndimawona nthawi zambiri. Sizinakhazikitsidwe-zimasintha ndi pafupifupi chikhalidwe chilichonse cha chilengedwe, ndipo ngakhale kusintha kwakung'ono kungawononge katundu wanu kapena kuyesa.

Ngati mutangoyamba kumene kugwira ntchito ndi gululi, tengani nthawi yoyesa kusungunuka kwa hydroxyapatite pazochitika zanu zenizeni ndi gulu lanu lazinthu. Musamangodalira zikhalidwe zofalitsidwa. Ngati mukugwiritsa ntchito chinthu chomwe chimadalira kusungunuka kosasinthasintha, pangani kuyesa kwa batch mumayendedwe anu owongolera - zidzakupulumutsirani nthawi ndi ndalama zambiri.

Hydroxyapatite ndichinthu chodabwitsa pamapulogalamu ambiri, koma kudziwa kusungunuka kwa hydroxyapatite ndiye chinsinsi chakupangitsa kuti ikugwireni ntchito.