Icyayi cy'icyuma kizwi kandi ku izina rya tetsubin cyangwa icyayi cy'icyayi cyakoreshwaga mu Buyapani nk'icyayi mu mazi abira akorerwa ku muriro.Abayapani noneho bamanika isafuriya yicyayi hejuru yumuriro wabo kugirango batange ubushyuhe buhagije, ubushuhe nubushyuhe mugihe cyubukonje.
Mugihe cyo kwinjiza icyayi kibisi hagati yikinyejana cya 19, icyayi cyicyuma cyakoreshwaga buri gihe bigatuma icyayi cyiza kayeri izwi cyane yo guhitamo muricyo gihe ndetse nubu.
Ibikoresho: icyuma
Umuti: enamel, ibihe byashize (amavuta yimboga), gutwikira ibishashara, kurwanya ingese, gushushanya umukara
Tera icyayi cyicyayi hamwe nicyuma kivanwaho Icyuma Cyinjiza Igitebo.Kandi icyayi gikozwe mucyuma imbere cyometseho enamel, kugirango ntigishobora kubora cyangwa kubora;Ntanubwo izashyiramo ibyuma.Kubaka ibyuma biremereye bigumana ubushyuhe neza, byemeza ko ibikombe bya kabiri bizakomeza gushyuha.
Igihe cyoherejwe: Gicurasi-18-2021