nasledstvennie narusheniya razvitiya tverdix tkaney zubov

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5.1.3. nasledstvennie narusheniya razvitiya tverdix tkaney zubov k nasledstvennim porokam razvitiya tverdix tkaney zubov otnosyatsya nasledstvenniy nesovershenniy amelogenez (nna), nasledstvenniy nesovershenniy dentinogenez (nnd), nasledstvenniy opalestsiruyushiy dentin (nod). nasledstvenniy nesovershenniy amelogenez (nna) otnositsya k chislu naibolee redkix i nedostatochno izuchennix porokov razvitiya tverdix tkaney zubov, imeet razlichnie formi, raznie klinicheskie proyavleniya, a takje raznie tipi nasledovaniya. v osnove etogo poroka razvitiya lejit nasledstvennoe nedorazvitie ektodermalnoy zarodishevoy tkani. nna chashe vstrechaetsya kak samostoyatelniy porok razvitiya emali, no mojet bit takje proyavleniem sochetannix sind-romnix assotsiatsiy i xromosomnix bolezney. danniy porok razvitiya privodit k izmeneniyu tsveta emali, ee istoncheniyu, umensheniyu velichini koronok, poyavleniyu na poverxnosti koronok yamok, ovalnix uglubleniy i borozdok, chto vizivaet narushenie esteticheskoy vneshnosti rebenka. vozniknovenie toy ili inoy formi nna obuslovleno narusheniyami, proisxodyashimi v matritse emali. tak, razvitie gipoplasticheskoy formi svyazano s narusheniem protsessa formirovaniya matritsi emali; gipomaturatsionnoy formi — s narusheniem ee sozrevaniya, gipomineralizovannoy formi — s narusheniem ee mineralizatsii. …

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niy prisushi svoi priznaki. gipoplasticheskaya forma nna imeet 6 vidov klinicheskix proyavleniy. autosomno-dominantniy yamochno-borozdchatiy gipoplasticheskiy nna (ris. 5.13). priznaki: na zubax vidni melkie i srednie po glubine yamki i borozdki, kolichestvo kotorix razlichno; chashe oni lokalizuyutsya na vestibulyarnoy i shechnoy poverxnostyax koronok. v menshem kolichestve defekti viyavlyayutsya na yazichnoy, nebnoy i kontaktnoy poverxnostyax. yamki raspolojeni xaotichno ili vistroeni v vide prodolnix stolbikov, borozdki takje imeyut prodolnoe napravlenie. protyajennost vistroennix v stolbiki yamok ili borozdok bivaet neodinakovoy. na odnix zubax, nachinayas ot rejushego kraya i bugrov, oni doxodyat do polovini koronok, na drugix defekti raspolagayutsya tolko v sredney ix chasti, reje, nachinayas ot rejushego kraya i bugrov, oni dostigayut sheyki zuba. te defekti, kotorie nachinayutsya ot rejushego kraya i vershin bugrov, vizivayut ix istonchenie, privodyashee k obrazovaniyu skolov. sloy emali istonchen lish v mestax obrazovavshixsya defektov, v kotorix za schet pishevogo pigmenta izmenen ee tsvet. pigment ne pronikaet v glub emali …

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oy ee istonchen lish v mestax uglubleniy. tsvet emali izmenen tolko v gipoplazirovannix istonchennix uchastkax, v kotorix ona svetlo-jeltogo ili svetlo-korichnevogo tsveta. intensivnost okraski emali zavisit ot glubini defekta i vozrasta rebenka. chem starshe rebenok i glubje defekti, tem intensivnee okrashivaetsya istonchennaya emal i obnajenniy dentin. chislo porajennix molochnix i postoyannix zubov variruet. autosomno-dominantniy gipoplasticheskiy gladkiy nna. zubi menshey velichini, pravilnoy formi, sloy emali istonchen po vsey poverxnosti koronok, tsvet ee variruet ot svetlo-jeltogo do svetlo-korichnevogo. poverxnost koronok gladkaya, blestyashaya, povishennoy prozrachnosti. emal dostatochno tverdaya. na nekotorix zubax otmecheni melkie skoli, sochetayushiesya s patologicheskoy stiraemostyu. mejdu zubami imeyutsya tremi. otmechaetsya giperesteziya ot temperaturnix razdrajiteley. porajeni molochnie i postoyannie zubi. autosomno-dominantniy gipoplasticheskiy granuloobrazniy nna. na poverxnosti koronok vidni mnojestvennie yamki i borozdki, raspolagayushiesya xaotichno, imeyushie razlichnuyu glubinu, a poslednie — neodinakovuyu shirinu i dlinu. emal, naxodyashayasya mejdu yamkami i borozdkami, granuloobraznogo vida, dostatochno tverdaya, prochno soedinyaetsya s dentinom, istonchena po vsey …

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noe vpechatlenie nalichiya na jevatelnoy poverxnosti zubov karioznix polostey. so vremenem shipi otkalivayutsya. na molochnix molyarax otkoli shipov chashe obnarujivayutsya na verxushke bugrov, v tom meste, otkuda oni berut nachalo. na postoyannix zubax otkoli nablyudayutsya s odinakovoy chastotoy, kak na vershine bugrov, v sredney ix chasti, tak i u osnovaniya. skolovshiesya u osnovaniya bugra shipi ostavlyayut na jevatelnoy poverxnosti uchastki obnajennogo dentina, po kotorim mojno opredelit kolichestvo imevshixsya ranee bugrov. deti jaluyutsya na giperesteziyu. obnajenniy dentin imeet neodinakovuyu okrasku, intensivnost kotoroy zavisit ot davnosti skola i ego glubini. nablyudaetsya porajenie molochnix i postoyannix zubov. x-stseplenniy dominantniy gipoplasticheskiy nna gladkiy u mujchin. emal neznachitelno istonchena po vsey poverxnosti koronok, gladkaya, blestyashaya, jeltovato-korichnevaya na bokovix zubax i svetlo-jeltaya na perednix. otmechayutsya tremi, patologicheskaya stiraemost emali i giperplaziya. porajeni molochnie i postoyannie zubi. x-stseplenniy dominantniy gipoplasticheskiy nna poloschato-borozdchatiy u jenshin. na vestibulyarnoy i shechnoy poverxnostyax koronok imeyutsya prodolno raspolojennie polosi i borozdi. emal …

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emali imeyut izmenennuyu formu i umenshennuyu velichinu. istonchenie i skalivanie emali bolee chasto otmechayutsya na vestibulyarnoy i shechnoy poverxnosti koronok. soxranivshayasya emal viglyadit v vide tonkix, malenkix ostrovkov, kotorie pri popitke otdeleniya ix ot dentina legko skalivayutsya ili otdelyayutsya tselikom, chto ukazivaet na xrupkost emali i oslablenie ee stsepleniya s dentinom. eti ostrovki emali pridayut poverxnosti koronok sheroxovatost. bolee tolstiy sloy emali otmechaetsya v prisheechnoy oblasti koronok. bolshoe kolichestvo soxranivsheysya emali obnarujivaetsya na kontaktnoy i nebnoy poverxnostyax zubov. u raznix grupp zubov tsvet emali neodinakov, on variruet ot svetlo-jeltogo na perednix zubax do temno-korichnevogo na jevatelnix. na bugrax molochnix i postoyannix molyarov nablyudayutsya melkie skoli i neznachitelnaya patologicheskaya stiraemost emali. imeyutsya tremi i giperesteziya, porajeni molochnie i postoyannie zubi. gipomaturatsionnaya forma nna imeet 4 vida klinicheskix proyavleniy. autosomno-dominantniy gipomaturatsionniy pigmentirovanniy nna (ris. 5.14). poverxnost koronok v pervoe vremya posle prorezivaniya zubov gladkaya, tolshina emali v predelax normi, tremi otsutstvuyut. emal …

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5.1.3. nasledstvennie narusheniya razvitiya tverdix tkaney zubov k nasledstvennim porokam razvitiya tverdix tkaney zubov otnosyatsya nasledstvenniy nesovershenniy amelogenez (nna), nasledstvenniy nesovershenniy dentinogenez (nnd), nasledstvenniy opalestsiruyushiy dentin (nod). nasledstvenniy nesovershenniy amelogenez (nna) otnositsya k chislu naibolee redkix i nedostatochno izuchennix porokov razvitiya tverdix tkaney zubov, imeet razlichnie formi, raznie klinicheskie proyavleniya, a takje raznie tipi nasledovaniya. v osnove etogo poroka razvitiya lejit nasledstvennoe nedorazvitie ektodermalnoy zarodishevoy tkani. nna chashe vstrechaetsya kak samostoyatelniy porok razvitiya emali, no mojet bit takje proyavleniem sochetannix sind-romnix assotsiatsiy i xromosomnix bolezney. danniy p...

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