I-Hydroxyapatite Solubility: Umhlahlandlela Ophelele 

Impendulo esheshayo

I-Hydroxyapatite solubility ichaza ukuthi ingakanani yale ngxube ye-calcium phosphate encibilika esixazululweni esinikeziwe, futhi iwukwenza noma ikhefu kumadivayisi ezokwelapha, imikhiqizo yamazinyo, nezinqubo zezimboni. Izinguquko ezincane ezimweni zemvelo zingashintsha kakhulu ukuncibilika kwe-hydroxyapatite, ngakho ukuqonda lezi zici kukusiza ukuthi uthole imiphumela engaguquki, ethembekile ngaso sonke isikhathi.

Uhlu Lokuphakathi

1. Isingeniso se-Hydroxyapatite Solubility
2. Izinto Ezibalulekile Zamakhemikhali Ezithinta I-Hydroxyapatite Solubility
3. Kungani I-Hydroxyapatite Solubility Ibalulekile Kwizicelo Zebhayoloji
4. Ukusetshenziswa Kwezimboni Ezisebenzayo Okuncike Ku-Hydroxyapatite Solubility
5. Izindlela Ezivamile Zokulinganisa Ukunyibilika kwe-Hydroxyapatite
6. Imibuzo Evame Ukubuzwa Mayelana ne-Hydroxyapatite Solubility
7. Isiphetho

1. Isingeniso ku I-Hydroxyapatite Ukuncibilika

Hydroxyapatite iyinhlanganisela ye-calcium phosphate eyenzeka ngokwemvelo—yilokho okwenza u-70% wezinyo lakho loqweqwe lwamazinyo kanye nama-60% wesisindo samathambo akho, empeleni. Ukunyibilika kwayo kungenye yezindawo zayo ezichaza kakhulu, futhi ilawula cishe yonke into esetshenziswayo emhlabeni wangempela.

Uma usebenza nale nhlanganisela ocwaningweni noma ekukhiqizeni, ukunyibilika kwe-hydroxyapatite okungahambisani kuzokhipha imiphumela yakho. Alikho ihlaya. Ngikubonile kwenzeka kaningi.

Ukunyibilika kwe-Hydroxyapatite kuziphatha ngendlela ehluke kakhulu emanzini ahlanzekile uma kuqhathaniswa noketshezi lomzimba uma kuqhathaniswa namanzi angcolile embonini ane-asidi. Emanzini ahlanzekile angathathi hlangothi, ayincibiliki nhlobo, kodwa lokho kushintsha ngokushesha lapho ususa ezinye izimo.

lo mhlahlandlela uzokuhambisa kulokho okushintsha ukunyibilika kwe-hydroxyapatite, kungani kubalulekile ekusetshenzisweni okuhlukile, nokuthi ungayikala kanjani ngokwethembeka. sizophinde siphendule imibuzo evame kakhulu engiyitholayo mayelana nale ndawo ekhohlisayo.

2. Izinto Ezibalulekile Zamakhemikhali Ezithinta I-Hydroxyapatite Solubility

Izinga le-pH engu-2.1 kanye nomthelela walo ezingeni lokuhlakazeka

I-pH ingumshayeli omkhulu we-hydroxyapatite solubility, izandla ziphansi. Cabanga ngalokhu-i-pH ephansi i-acidic kakhulu, futhi i-asidi idla isakhiwo se-crystal ngendlela efanayo edla ngayo koqweqwe lwawo lwamazinyo.

Njengoba i-pH yehla ngaphansi kuka-5.5, ukuncibilika kwe-hydroxyapatite kuya phezulu. Ngaphezulu kuka-7, lihlala licishe lingancibiliki ngokuphelele. Ake ngikubonise ukuthi lolu shintsho lumangalisa kangakanani:

Uyahlanya, akunjalo? Yingakho ukubola kwamazinyo kwenzeka uma udla ushukela omningi-amagciwane omlomo akhiqiza i-asidi eyehla i-pH futhi ikhulise ukunyibilika kwe-hydroxyapatite koqweqwe lwawo.

2.2 Izinga lokushisa namandla e-ionic esixazululo esizungezile

Iningi labantu alicabangi ngezinga lokushisa, kodwa liyashintsha ukuncibilika kwe-hydroxyapatite kancane. Ukunyibilika kwe-Hydroxyapatite kuyenyuka njengoba izinga lokushisa likhuphuka, kodwa ushintsho luncane kakhulu phakathi kuka-20°C no-40°C (ububanzi esivame ukukhathalela ngokusetshenziswa kwezinto eziphilayo).

Amandla e-ionic ingqikithi yokuhlanganisa ama-ion ashajiwe esixazululweni, futhi anomthelela omkhulu. Uma unosawoti oncibilikisiwe osuvele usesixazululweni, empeleni wehlisa ukunyibilika kwe-hydroxyapatite ngokuvala ama-ion amahhala e-calcium ne-phosphate abengase ahlukane nekristalu.

kufana nekhonsathi egcwele abantu—uma isingekho indawo phansi, abantu abasha abakwazi ukungena. Umbono ofanayo nama-ion lapha.

2.3 Ukungcola nokushintshwa kwesakhiwo sekristalu ye-hydroxyapatite

I-hydroxyapatite ehlanzekile inesakhiwo sekristalu esingaguquki, kodwa cishe zonke izinhlobo zezohwebo noma zokwenziwa zinokungcola okuthile noma esikhundleni se-ion. Ukushintshwa kwe-carbonate kuvame kakhulu, futhi kukhulisa ukuncibilika kwe-hydroxyapatite ngesikhathi esikhulu.

Emuva ngenkathi ngisebenza elebhu yezinto zokwakha ngo-2021, ngenza leli phutha ngokwami. Ngayala i-hydroxyapatite yokwenziwa “ehlanzekile” kumnikezeli oshibhile okwavela ukuthi ine-8% ye-carbonate esikhundleni, futhi ukuhlolwa kwami ​​​​kokuncibilika kwakuphakeme ngo-3x kunedatha eshicilelwe. Ngamosha amasonto amathathu emsebenzini. Hawu.

Ukushintshwa kwe-fluoride kwenza okuphambene—kwenza ikristalu izinze, okwehlisa ukunyibilika kwe-hydroxyapatite. Yingakho i-fluoride toothpaste isebenza, ngendlela.

3. Kungani I-Hydroxyapatite Solubility Ibalulekile Ngezicelo Zebhayoloji

3.1 Iqhaza ekuvuselelweni kabusha kwamazinyo kanye nemikhiqizo yokunakekelwa ngomlomo

Cishe ubonile i-nano-hydroxyapatite ku-toothpaste yemvelo kulezi zinsuku, akunjalo? Isebenza ngoba ukunyibilika kwe-hydroxyapatite kuphezulu nje ngokwanele emlonyeni we-pH (cishe u-6.2-6.8) ukuze kudedelwe kancane ama-ion e-calcium ne-phosphate agcwalisa imigodi emincane yasekuqaleni.

ngonyaka odlule ngisebenze nesiqalo esincane sokunakekelwa komlomo e-Charlotte, eNyakatho ne-Carolina esasizabalaza nomuthi wabo wokuxubha ovuselela amazinyo. Ukunyibilika kwabo kwe-hydroxyapatite bekuphansi kakhulu, ngakho bekungenzi lutho ukulungisa ukulimala koqweqwe lwakuqala.

Sishintshele ku-hydroxyapatite engusayizi we-nano enenani elincane lokushintshwa kwe-carbonate, okukhuphule ukunyibilika ngokwanele. Esivivinyweni sabo samaviki angu-12, abasebenzisi babe nokuvuselelwa kabusha okungama-37% kwemigodi yokuqala kunefomula yabo endala. Isishintshi somdlalo.

3.2 Imithelela yokuxhunyelelwa kwamathambo kanye nobunjiniyela bezicubu

Ukuze uthole ukuxhunyelelwa kwamathambo, udinga ukunyibilika kwe-hydroxyapatite ukuze kube okulungile-okuphansi kakhulu, futhi umzimba wakho awukwazi ukuwephula ukuze ubeke ithambo lomdabu elisha esikhundleni salo. Iphakeme kakhulu, futhi iyancibilika ngaphambi kokuba kukhule ithambo elisha eduze kwayo.

kufana nokuthela isisekelo sendlu—uma isisekelo sincibilika ngokushesha, indlu iyawa ngaphambi kokuba uqede ukwakha. Uma ingasuki, awukwazi ukuyilungisa kabusha ukuze ihambisane nezidingo zakho ngokuhamba kwesikhathi.

Ucwaningo lwango-2023 oluholwa nguDkt. Lena Marquez eIjenali ye-Biomedical Materials Researchwabheka imikhiqizo engu-42 ehlukene yokuxhunyelelwa kwamathambo futhi wathola ukuthi i-19% yayo ine-hydroxyapatite solubility ngaphandle kwebanga elifanele lokuhlanganiswa. Lawo ma-graft ayenamathuba angu-2.7x amaningi okuthi angaphumeleli phakathi nonyaka. Wild.

Ngithintana nenkampani yokuxhunyelelwa amathambo e-Cleveland, futhi sihlola ukunyibilika kwe-hydroxyapatite kuqoqo ngalinye ukuze siqiniseke ukuthi iwela kulelo banga elingu-0.1-0.3 mg/mL ku-pH 7.4. Akuxoxiswana ngakho.

4. Ukusetshenziswa Okusebenzayo Kwezimboni Okuncike Ekunyibilikeni kwe-Hydroxyapatite

Enye yezinto ezinkulu ezisetshenziswa ezimbonini ukwelapha amanzi—i-hydroxyapatite ibopha ezinsimbi ezisindayo njengomthofu ne-cadmium, kodwa lokho kusebenza kuphela uma ukunyibilika kwayo kuhlala kuphansi. Uma incibilika kakhulu, ugcina usune-phosphate eningi emanzini akho aphethwe, okubangela ukuqhakaza kwe-algae.

Ngisebenze nesikhungo esincane sokuhlanza amanzi e-Des Moines emuva ngo-2022 esasibhekene ngqo nale nkinga. Imidiya yabo yokuhlunga yayinokuncibilika okuphezulu kakhulu kwe-hydroxyapatite, futhi babehlawuliswa ngokukhipha i-phosphate ngokweqile.

Sashintsha abezindaba nge-high-tempered sintered hydroxyapatite, eyehlisa ukunyibilika futhi yalungisa inkinga emasontweni amabili. Lokho kubagcinele inhlawulo ka-$12,000 yanyanga zonke. Akukubi.

Iphinde isetshenziselwe ukulethwa kwezidakamizwa okulawulwayo, lapho ufuna ukunyibilika kwe-hydroxyapatite kube phezulu ngokwanele ukuthi umuthi udedela kancane emasontweni noma izinyanga esikhundleni sakho konke ngesikhathi esisodwa. Futhi ekukhiqizeni kwe-ceramic, ukuncibilika kwe-hydroxyapatite okuphansi kunikeza amandla e-ceramic aqediwe nokumelana nokugqwala kwezingxenye zokufakelwa.

5. Izindlela Ezivamile Zokulinganisa Ukunyibilika kwe-Hydroxyapatite

5.1 I-Potentiometric titration yesibalo esingaguquki somkhiqizo we-solubility (Ksp).

I-Potentiometric titration iyindinganiso yegolide yokuthola inani eliqinile le-Ksp, elikutshela ukunyibilika kwe-hydroxyapatite okuyisisekelo kusixazululo esinikeziwe. Ungeza kancane isixazululo esine-asidi ku-slurry ye-hydroxyapatite, ulandelele ukuthi i-pH ishintsha kanjani njengoba incibilika, futhi ubale i-Ksp kusukela kudatha.

inzuzo lapha ukuthi uthola inombolo enembe kakhulu, ekwazi ukukhiqizwa kabusha ye-hydroxyapatite solubility. Akusheshi kakhulu, kepha kunembile uma uyenza kahle.

5.2 Ukuhlolwa kwe-kinetics yokuqedwa okuqinile

Uma unendaba ukuthi i-hydroxyapatite incibilika ngokushesha kangakanani esikhundleni sokuncibilika kokulinganisa kokugcina, wenza ukuhlola kwe-kinetics. umisa inqwaba eyaziwayo ye-hydroxyapatite eqinile esixazululweni esibanjwe ku-pH engashintshi kanye nezinga lokushisa, bese udonsa amasampula amancane ngesikhathi esimisiwe futhi ulinganise ukugxila kwe-calcium encibilikile.

lokhu kukunikeza ijika eligcwele lokuhlakazeka, ukuze wazi kahle ukuthi ukunyibilika kwe-hydroxyapatite kuziphatha kanjani ngokuhamba kwesikhathi-okubalulekile ezintweni ezifana nokulethwa kwezidakamizwa noma ukuxhunyelelwa kwamathambo lapho isilinganiso sibaluleke kakhulu njengesamba sesamba.

6. Imibuzo Evame Ukubuzwa Mayelana ne-Hydroxyapatite Solubility

Ingabe i-hydroxyapatite iyancibilika emanzini?

I-hydroxyapatite ehlanzekile cishe ayincibiliki emanzini ahlanzekile angathathi hlangothi. Ku-25°C naku-pH 7.0, ukunyibilika okuphezulu kwe-hydroxyapatite kuzungeze u-0.0007 mg ngemL yamanzi kuphela. Lokho kusho ukuthi ngaphansi kwe-1 milligram kuzoncibilika ilitha eligcwele lamanzi. I-hydroxyapatite engcolile noma efakwe esikhundleni incibilika kakhulu, kodwa isabhekwa njenge-solubility ephansi kakhulu uma iqhathaniswa nezinye izinhlanganisela eziningi ze-calcium phosphate. Ayisoze yancibilika ngokugcwele njengosawoti wetafula, kungakhathaliseki ukuthi uyinyakazisa kangakanani.

I-pH ithinta kanjani ukunyibilika kwe-hydroxyapatite emlonyeni?

I-pH yokuphumula evamile emlonyeni iphakathi kuka-6.2 no-6.8, okubeka ukunyibilika kwe-hydroxyapatite kuphakeme ngokwanele ukuvuselelwa kabusha kancane. Uma udla ushukela, amagciwane omlomo akhiqiza i-lactic acid ekwazi ukwehlisa umlomo i-pH ibe ngaphansi kuka-5.5. Ngaleso sikhathi, i-hydroxyapatite solubility spikes ikhuphuka kakhulu, futhi koqweqwe lwawo lwemvelo luqala ukuncibilika ngokushesha kunokuba lungakwazi ukuzilungisa ngokwalo—yileyo ndlela imigodi eyakha ngayo. I-fluoride evela ku-toothpaste ihlanganisa esakhiweni se-hydroxyapatite, yehlisa ukuncibilika kwayo, futhi ivikela uqweqwe lwawo ekuncibilikeni kwe-asidi.

Uyini umkhiqizo we-solubility (Ksp) we-hydroxyapatite?

Inani elamukelekile le-Ksp le-stoichiometric hydroxyapatite emsulwa kokuthi 25°C futhi i-pH 7.0 icishe ibe ngu-2.07 × 10^-59. Ima, lelo inani elincane kakhulu—kusho ukuthini lokho ngempela? Kusho ukuthi ukuhlangana okulinganayo kwama-ion ancibilikisiwe kusixazululo kuncane, okuhambisana nokuncibilika kwe-hydroxyapatite okuyisisekelo esiphansi kakhulu esikubona emanzini ahlanzekile. Leyo nombolo iyashintsha ngokusekelwe ku-pH, izinga lokushisa, nokungcola okuyikristalu. I-hydroxyapatite efakwe esikhundleni se-carbonate ingaba nama-oda we-Ksp 3 kuya ku-4 wobukhulu obuphezulu, okusho ukunyibilika kwe-hydroxyapatite okuphezulu kakhulu. Njalo hlola impahla yakho ethile, unganciki kumanani ashicilelwe we-hydroxyapatite emsulwa.

Kungani ukuncibilika kwe-hydroxyapatite okuphansi kuhle ekufakweni kwamathambo?

Ukuncibilika kwe-hydroxyapatite okuphansi kusho ukuthi izinto zokufakelwa zizohlala ziqinile isikhathi eside ngokwanele ukuze amangqamuzana amathambo omzimba wakho akhule abe yigraft. Uma i-hydroxyapatite solubility iphezulu kakhulu, i-graft ihlakazeka ngokuphelele ngaphambi kokuba ithambo elisha likwazi ukwakha, okuholela ekuhlulekeni kokufakelwa. Ukuncibilika okuphansi futhi kunikeza isigxivizo amandla adingekayo ukuze sithwale umthwalo ngenkathi ithambo elisha likhula. Sekushiwo lokho, awufuni ukuncibilika ku-zero—ukuncibilika kancane kancane kuhle, ngoba kuvumela umzimba esikhundleni sokuxhunyelelwa ngethambo lomdabu ngokuhamba kwesikhathi esikhundleni sokushiya impahla yangaphandle ehlala njalo.

7. Isiphetho

Izici eziyinhloko ezishintsha ukunyibilika kwe-hydroxyapatite yi-pH, izinga lokushisa, amandla e-ionic, nokungcola noma ukufaka esikhundleni se-crystal structure. I-pH ingumshayeli omkhulu kakhulu, futhi ukuncibilika kwe-solubility spiking kakhulu uma i-pH yehla ngaphansi kuka-5.5. Ukulawula ukunyibilika kwe-hydroxyapatite kuwumehluko phakathi kwempumelelo nokwehluleka kwayo yonke into kusukela ekukhumbuzeni umuthi wokuxubha amazinyo kuya ekuxhunyweni kwamathambo ukuya ekuhlanzeni amanzi ezimbonini.

ngokweqiniso, ngicabanga ukuthi abantu abaningi abasha ekusebenzeni nalokhu okubalulekile abakunaki ukunyibilika kwe-hydroxyapatite futhi bavele bacabange ukuthi yimpahla engashintshi. Yilelo iphutha engilibona kaningi. Ayilungisiwe-iyashintsha cishe kuzo zonke izimo zemvelo, futhi izinguquko ezincane zingonakalisa umkhiqizo noma ukuhlolwa kwakho.

Uma usanda kuqalisa ukusebenza nale nhlanganisela, zinike isikhathi sokuhlola ukunyibilika kwe-hydroxyapatite ngezimo zakho ezithile kanye neqoqo lakho lempahla ethile. Unganciki nje kumanani ashicilelwe. Uma usebenza ngomkhiqizo oncike ekuncibilikeni okungaguquguquki, yakha ukuhlolwa kwenqwaba kunqubo yakho yokulawula ikhwalithi—kuzokongela isikhathi esiningi nemali phansi.

IHydroxyapatite iyinto engakholakali yezinhlelo zokusebenza eziningi, kodwa ukwazi ukunyibilika kwe-hydroxyapatite kuyisihluthulelo sokwenza ukuthi ikusebenzele.