Tongedza Madzitateguru Edu Kune Meso Anorwadza
Uchenjeri huri meno (kana chechitatu molars) huri chinhu chakavanzika. Sei tichizopiwa mazino ayo, mumatambudziko akawanda, achangopedzisira atorwa? Apo huchenjeri huri meno ndedzevanhu vemazuva ano vauya kuzotya, basa remeno euchenjeri rinodzokera kumashure madzitateguru edu ekare.
Chikonzero nei Tichiwana Uchenjeri Mazwi
Madzitateguru edu ekare aipona paaidya nyama yakasvibirira, marimu, midzi, mabriji, uye mashizha.
Cro-Magnon murume akanga asina ruzha rwekumisa mapanga kuti acheke uye agadzirire zvokudya zvake uye kubika nyama yake yakanga isiri iyo yaisarudzo. Kucheka izvi zvakashata, zvakaoma, uye zvakaoma zvinoda mutsara wakazara uye wakasimba-kunosanganisira mano euchenjeri.
Kuva nemitemo mitatu kwakakosha kuitira kuti madzitateguru edu ave nekugona kudya zvokudya zvakakosha kuti vararame. Chirabwe chikuru chakange chakajairika kumadzitateguru edu chinongogara nyore mazino euchenjeri. Izvi zvakavabvumira kuti vapinde mumuromo kazhinji.
Kuwanda kwemazino euchenjeri ndeimwe yenzira iyo anthropologists vanogona kuziva nguva yezvipfeko. Somuenzaniso, "Turkana Boy" skeleton pa Smithsonian National Museum ye Natural History inosvika kusvika mamiriyoni 1.6 emakore apfuura. Vatsvakurudzi vanotenda kuti aiva nemakore masere kana mapfumbamwe akaberekwa, muchidimbu, kuti chikamu chake chechitatu chakanga chisati chavapo paakafa.
Sei Tisingadi Uchenjeri Mazano Nhasi
Kurumidza-enda kune nhasi uye utarise zvatiri kudya.
Chinonyanya kukosha, tarisai kuti tinogadzirira sei kudya chatinodya.
Tinocheka, dice, kubika, kubika, kubika, uye kubika zvese zvatinodya. Zvose zvekugadzirira kwekudya zvakagadzira kudya chikafu chakanaka chakanaka kuita. Ichokwadi, nyanzvi dzinofunga kuti jawline yedu yakava yakawanda uye yakawanda kudarika makore nekuda kwekudya kwekugadzirira uye kupedzwa.
Ndicho chikonzero nei mano edu euchenjeri achida kubviswa.
Sei Uchenjeri Huchiva Chinetso?
Sezvo vanhu vemazuva ano vakagadzirwa, sangano redu rose rakachinja. Nokufamba kwenguva, rushaya rwakava duku uye mazino makumi maviri nemaviri haaigona kugona zvakakodzera. Sezvo uchenjeri hunobuda meno hunogona kukonzera mamwe mazino uye hukonzera matambudziko. Vamwe vanototanga "kuchinjwa" uye havakwanisi kuputika nokuti hapana nzvimbo uye vanovharwa nemamwe meno.
Haasi munhu wose ane meno ekuchenjera, zvakadaro. Zvichida, zvingasazoputika kunze kwepamusoro. Pane zvikonzero zvezvikonzero izvi, maererano nevatsvakurudzi . Izvi zvinosanganisira majeko uye kukwidziridzwa kwezino, ukuru, uye nzvimbo inowanikwa muruvara.
Kunyange kana mazino euchenjeri asiri kukonzera dambudziko maererano nekusiyana, mazino euchenjeri anogona kubudiswa kudzivirira nyaya dzenguva dzese dzakadai sekugadzirwa kwezvirwere. Mazino aya ari kure kumashure mumuromo unochengetwa kwakanaka kuti uchengetedze utano kunogona kuva kwakaoma. Chiremba wemazino angakurudzira murwere kuti ave nemazino avo euchenjeri akakweverwa kune utano husingaperi.
Sei Vanonzi "Uchenjeri" Meso?
Yako yechitatu mitambo ndiyo yakagadzirirwa mazino kuti aone mumuromo. Zvinowanzoputika pakati pemakore 17 ne21.
Nemhaka yezera iri gare gare, vakazozivikanwa se "uchenjeri" meno. Zvingangodaro kuti zita rezita rezita rine chimwe chinhu chingaita nehutauriri kana kutenda kuti "nezera rinouya uchenjeri."
> Kwakabva:
> American Association of Oral and Maxillofacial Surgeons. Kutsigira Ruzivo kune Kutungamirirwa Kwevarwere neTatu Molar Teeth . 2016.
> Pogrel MA, et al. White Paper pamusoro peTatu Molar Data. American Association of Oral and Maxillofacial Surgeons. 2007.
> Smithsonian National Museum of Natural History. Zvinorevei kuva Munhu: KNM-WT 15000. 2016.