emalevo-dentinnaya granitsa

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Updated Dec 2025

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slayd 1 «ya poznanie sdelal svoim remeslom…» tema: tish qattiq va yumshoq to’qimalarining tuzilishi, kimyoviy tarkibi va vazifalari emalevo-dentinnaya granitsa dentin tverdaya osnova zuba opredelyaet formu zuba. emal pokrivaet dentin koronki zuba dentin kornya pokrit— tsementom mesto soedineniya emali koronki i tsementa kornya prixoditsya na sheyku zuba vozmojni 3 vida soedineniya emali s tsementom a - 60 – 70%v oni perekrivayut drug druga (emal perekrivaet tsement i naoborot) b - oni soedinyayutsya vstik v - primerno v 10 % sluchaev emal ne doxodit do kraya tsementa i mejdu nimi ostaetsya otkritiy uchastok dentina. emalevo-dentinnaya granitsa imeet festonchatiy vid dlya bolee prochnogo soedineniya dentina i emali emalevie veretyona – korotkie (neskolko mkm) veretenoobraznie strukturi perpendikulyarno dentino-emalevoy granitse obrazuyutsya v rezultate poniknoveniya otrostkov odontoblastov v emal uchastok shlifa zuba deg — dentino-emalevaya granitsa ev — emalevie veretena ep — emalevie prizmi epu — emalevie puchki epl — emalevie plastinki tolshina emali maksimalna …

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i) snaruji rotovoy jidkostyu so storoni pulpi — tkanevoy jidkostyu nalichiyu prostranstv v emali, zapolnennix jidkostyu emal pronitsaema v oboix napravleniyax: ot poverxnosti emali k dentinu i pulpe ot pulpi k dentinu i poverxnosti emali na etom osnovanii emal zuba schitayut polupronitsaemoy membranoy pronitsaemost est glavnaya prichina sozrevaniya emali zubov posle prorezivaniya v zube proyavlyayutsya obichnie zakoni diffuzii emal polupronitsaemoy membranoy stepen pronitsaemosti emali v razlichnie periodi razvitiya zuba snijaetsya v sleduyushem ryadu: emal zachatka zuba emal vremennogo zuba emal postoyannogo zuba pojilogo cheloveka emal postoyannogo zuba molodogo cheloveka plotnost emali snijaetsya ot poverxnosti koronki vglub k dentino-emalevoy granitse ot rejushey kromki k sheyke demineralizatsiya – vixod ionov iz emali remineralizatsiya – postuplenie ionov v emal 1 2 11 emal yavlyaetsya samoy tverdoy tkanyu tela cheloveka, chto ob'yasnyaetsya visokim soderjaniem v ney mineralnix soley. ximicheskiy sostav emali: do 97 % neorganicheskix veshestv 2-3 % svobodnoy vodi 1-2 % organicheskix veshestv …

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eti, niti kotoroy raspolagayutsya mejdu kristallami. prizmi xarakterizuyutsya poperechnoy ischerchennostyu, obrazovannoy cheredovaniem svetlix i tyomnix polos s intervalami v 4 mkm, chto sootvetstvuet sutochnoy periodichnosti formirovaniya emali (linii rettsiusa) polosi rettsiusa mojno razlichit pod svetovim mikroskopom. oni obrazuyutsya v rezultate periodicheskix faz pokoya ameloblastov v period obrazovaniya emali, i vneshne sxodni s protsessom obrazovaniya godichnix kolets dereva eto preimushestvenno gipomineralizovannie uchastki okrashennie v jyolto-korichneviy tsvet imeyut vid simmetrichnix arok, idushix koso ot poverxnosti emali k dentino-emalevoy granitse napravlennie na prisheechnom uchastke k poverxnosti emali na koronkovom uchastke, vozle dentinnogo yadra, oni obrazuyut polukrug lini rettsiusa 15 1 — emal 2 — kosie temnie linii — emalevie poloski (linii rettsiusa) 3 — chereduyushiesya emalevie poloski (polosi shregera) 4 — koronka zuba 5 — dentin 6 — dentinnie kanaltsi 7 — sheyka zuba 8 — polost zuba 9 — dentin 10 — koren zuba 11 — tsement 12 — kanal kornya zuba …

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stentnost emali) cherez dva chasa posle chistki v formiruyusheysya pellikule obnarujivayutsya mikroorganizmi cherez odin-dva dnya posle polnoy kolonizatsii mikroorganizmami pellikula stanovitsya zubnoy (bakterialnoy) blyashkoy. zubnaya blyashka raspolagaetsya nad pellikuloy zuba blyashka bestsvetna dlya ee obnarujeniya primenyayut okrashivayushie rastvori rastet putem adsorbtsii mikroorganizmov i naslaivaniya novix bakteriy (v 1g. do 800 millionov mikrobov) posle udaleniya abrazivom vosstanavlivaetsya cherez 2 chasa ne smivaetsya i ne vsegda polnostyu udalyaetsya zubnoy shetkoy v vozniknovenii kariesa i vospalitelnix zabolevaniy parodonta vajneyshaya rol prinadlejit zubnoy blyashke. sovremennaya teoriya – blyashka kak bioplenka zubnaya blyashka sostoit glavnim obrazom iz proliferiruyushix mikroorganizmov, epitelialnix kletok, leykotsitov i makrofagov organicheskie i neorganicheskie tverdie komponenti sostavlyayut okolo 20% ot massi blyashki, ostalnoe – voda. bakterii sostavlyayut okolo 70% tverdogo ostatka, ostalnoe – mejkletochniy matriks matriks sostoit iz kompleksa polisaxaridov i proteinov (po 30%), a takje okolo 15% lipidov glavnimi neorganicheskimi komponentami matriksa blyashki yavlyayutsya kaltsiy i fosfor magniy, kaliy, natriy, ftor …

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rodukt jiznedeyatelnosti mikroorganizmov (str.mutans i str.salivarius) iz saxarozi svoystva visokie adgezivnie svoystva k razlichnim poverxnostyam nizkaya rotovaya rastvorimost visokaya ustoychivost k kislotam levan – ispolzuetsya v kachestve pitatelnogo uglevodnogo substrata blyashka ne yavlyaetsya ostatkom pishi bakterii blyashki ispolzuyut vvedennie pitatelnie veshestva dlya obrazovaniya komponentov matriksa osobenno te, kotorie legko diffundiruyut v blyashku – eto saxaroza, glyukoza, fruktoza, maltoza, laktoza. kraxmali slujat bakterialnim substratom dentin dentin - eto spetsializirovannaya soedinitelnaya tkan, sostavlyayushaya osnovnuyu massu zuba po vsey ego dline po strukture on sxoden s grubovoloknistoy kostyu i otlichaetsya ot nee bolshey tverdostyu po sravneniyu je s emalyu zuba on menee mineralizovan i imeet kletochnie vklyucheniya osnovnim kletochnim tipom v dentine yavlyaetsya odontoblast, kotoriy proisxodit iz ektomezenximi osnovnoe veshestvo dentina, lejashee mejdu kanaltsami, sostoit iz kollagenovix volokon i skleivayushego ix veshestva vidi dentina pervichniy dentin – obrazuetsya vo vremya formirovaniya zuba vtorichniy dentin – obrazuetsya v techenie vsey jizni i po strukture …

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slayd 1 «ya poznanie sdelal svoim remeslom…» tema: tish qattiq va yumshoq to’qimalarining tuzilishi, kimyoviy tarkibi va vazifalari emalevo-dentinnaya granitsa dentin tverdaya osnova zuba opredelyaet formu zuba. emal pokrivaet dentin koronki zuba dentin kornya pokrit— tsementom mesto soedineniya emali koronki i tsementa kornya prixoditsya na sheyku zuba vozmojni 3 vida soedineniya emali s tsementom a - 60 – 70%v oni perekrivayut drug druga (emal perekrivaet tsement i naoborot) b - oni soedinyayutsya vstik v - primerno v 10 % sluchaev emal ne doxodit do kraya tsementa i mejdu nimi ostaetsya otkritiy uchastok dentina. emalevo-dentinnaya granitsa imeet festonchatiy vid dlya bolee prochnogo soedineniya dentina i emali emalevie veretyona – korotkie (neskolko mkm) veretenoobraznie strukturi perp...

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