Amazinyo yabantu

amazinyo Human - imfundo eqinileyo, apho ibekwe alveoli imihlathi. Bona iindawo ebalulekileyo matshini, ogama umsebenzi mu- kuyo. amazinyo zabantu abe eliphezulu umthamo umahluko. Bona zincinane kakhulu xa kuthelekiswa sodidi zeenkawu.

Kukho amaqela ezine imihlathi,: kwamazinyo premolars, siphume, canines. Xa kwezamazinyo ezifana ukubunjwa bahlulwe ngapha ngaphambili. Le ndoda iminyaka esixhenxe yokusebenza amazinyo yethutyana, ezo ke siguqulelwe abasisigxina. La manani zixhomekeke yokungafani, ezo zibangelwa awohluke nutrition kunye nokusingqongileyo. Kwiminyaka 32 khona amazinyo yokugqibela yale hlobo. Ngoko ke, ukuze ukwazi zingaphi amazinyo umntu kunokuba kuphela kweli phakade. Esi sixa ilingana 32 Amazinyo yokugqibela badla zancitshiswa, ngamanye amaxesha musa qhuma. Kukho indlela ekhethekileyo ukumisela ixabiso lwedata ukubunjwa ithambo. Ibizwa ngokuba izinyo. Xa abadala, oko ngolu hlobo lulandelayo: emithathu imihlathi, premolars ababini, omnye canine, siphume ezimbini kwesiqingatha ngasinye zombini imihlathi.

Anatomy of amazinyo zabantu

Kukho iindawo ezintathu lokhu: isithsaba, ingcambu entanyeni. Ngaphakathi izinyo ngasinye umngxuma, lwahlulwe lwaba ingcambu ichibi kunye em- isithsaba. Ngenxa umngxuma enkcochoyini ibekwe luvo, iimpahla ukuqinisekisa ukusebenza eqhelekileyo welungu. Bona ifumaneka yintlama, nto leyo efuziselwa izihlunu okubi nokuqina. Wall fanele ngqo ihlafuna kumphezulu nezinyo kuthiwa isiqulathi.

Xa kwezamazinyo wesiko ukwahlula iimanyano kumphezulu data ezine: vestibular, zeelwimi, masticatory (y premolars kunye imihlathi - nokubotshwa moya) qha. Le mimiselo elisekwe yoviwo ngqo. Umqhele, engcambu uwahlule ube zahlulo zithathu: i occlusal, embindini, lesithathu wesibeleko.

amazinyo abantu babe sisincoko ezintsonkothileyo. Bona kwakhiwa dentine, nto leyo imelwe ilaphu kostepodobnoy eyenziwa odontoblasts. Ukubunjwa yokugqibela ziquka iityuwa ezimbiwayo (calcium fluoride, nemagnesium phosphate, calcium phosphate) neerhali eziphilayo (collagen).

izinyo isithsaba iquka kweziyobisi ingakumbi isiqina - lo lwawo, nto leyo yakhiwe ngayo prisms ukuba abe Ebubanzini 3-5 microns. It iqulathe iityuwa kwezimbiwa efanayo nakwabo dentin.

Intamo kunye ingcambu ugqunywe isamente - into efanayo ithambo. It iqulathe ka-30% kwezinto eziphilayo (collagen), singene ubunzima eziseleyo iityuwa yezimbiwa (calcium carbonate, calcium phosphate).

Zonke ngomlomo zemfundo ngaphantsi kwekota: తీసివేయి Susa. It has a ukwehla ezimbaxa yaye ibandakanya periodontium, izihlunu, amalungu, kwamadlala amathe, amazinyo. Le nkqubo inika imisebenzi ehlafuna kwaye inxaxheba ukuyilwa zentetho.

abamelene amazinyo ebizwa osculating ukubunjwa eliphezulu mandible. amalungu Bone ibekwe kwicala lasekhohlo nasekunene zibizwa ngokuba antimeres.

Ulwalamano lwamabala nemihlathi తీసివేయి Susa zonke iintshukumo kuthiwa kwiCandelo. uhlobo oluthile eli binzana occlusion, efunyaniswa ngokuvala ngokuseka ngexesha ukuhlafuna. It is a sisiqinisekiso ekumiseni occlusion.

Eli gama libhekisela lulwahlulo eliphezulu, తీసివేయి Susa ephantsi ngethuba kuvalwe imihlathi. Ezi ndidi zilandelayo malocclusion: arch alveolar ibekwe kwinqanaba elifanayo, omnye wabo ibekwe phambi enye. Bokuphila ingqalelo imeko apho kumqolo eliphezulu amazinyo kulinganiselwe kwatshintsha phambili malunga ezantsi. Nangona kunjalo, phantsi kweemeko ezahlukeneyo zophendlo lwezifo em- ngomlomo, kwentlungu, occlusion zinokwahluka. amazinyo Human kulo mzekelo, uyakwazi ukutshintsha imilo kunye nokwakheka.