Hangarau Tapahi Niho

Ko te whakamahinga o ngā hangarau tapahi-whakamuri te nuinga o te wā i roto i ngā āhuatanga e whai ake nei:

1. He maha ngā niho e ngaro ana i te tūroro, ā, me roa ake te piriti, neke atu i te 6 ngā niho i te nuinga o te wā.

2. Kāore i te tino pai te whakaritenga o ngā niho tautoko o te tūroro, ā, ka hua ake he piko ngoikore o te papa o te niho.

3. Kāore i te nui te wāhi o te tākuta mō te whakarite niho, he tino pakari rānei ngā whakaritenga mō te wāhi (hei tauira, ina whakatikatikaina ngā niho o mua, me waiho he wāhi anō mō ​​te porcelain.

Ko ngā āhuatanga matua hei aro atu mā te hangarau tapahi ko:

1. Me rerekē te tae o te karauna o roto kua tapahia ki muri i te tae o te karauna katoa, ā, me whakarite kia tutuki te matotoru o te ware pi o roto i te paerewa. Ina tapahia, ina whakaatuhia te ware pi o roto, kia aro ki te matotoru o te tuara kua tapahia.

2. Ko te kaupapa o te tapahi i muri ko te waiho i te matotoru ōrite o te paparanga porcelain. I te tapahi i muri, kia aro ki te matotoru ōrite o te tapahi i muri. Ka puritia tetahi wāhanga o te ware pi katoa ki runga i te ware pi o roto o te karauna, hei whakakī i te korenga o te rata i te wā e whakarite ana i ngā niho. Me waiho tēnei wāhanga, ā, me ako pai ēnei wāhi, me ako te karauna o roto, me ako hoki ngā niho tautoko.

3. Ka taea te tirotiro i te mahi a te karauna katoa kua whakahokia mai, ka taea ai te karo i ngā raruraru i ētahi wāhi, inā koa i ngā wāhi kāore i te rawaka te wāhi, ina pania te porcelain, inā koa ko ngā niho o muri (pēnei i te 7, 8) o ngā niho maxillofacial me ngā niho o mua (1, 2) o te taha arero.