Ifomula yamazinyo yezinja

 Ngokuvamile, zonke izinja zinama-molars angu-42, kodwa ezinye izinhlobo ezinezimbotshana ezimfishane, okuthiwa ama-brachycephals, zingase zibe namazinyo angekho (oligodontia). Kuphinde kube nokubi njengokwenyuka kwenani lamazinyo (i-polydontia). Igama le-alphanumeric lisetshenziselwa ukurekhoda ifomula yamazinyo yezinja.

• Ama-Incisors (Incisivi) - I
• I-Caninus - P
• I-Premolyar (Premolars) - P
• Molars (Molares) - M

Efomini elinqunyiwe, ifomula yamazinyo yezinja ibonakala kanje: umhlathi ongenhla 2M 4P 1C 3I 3I 1C 4P 2M - 20 amazinyo omhlathi ophansi 3M 4P 1C 3I 3I 1C 4P 3M - 22 izinyo, futhi uhlamvu lubonisa uhlobo lwezinyo : umhlathi ongenhla M2, M1, P4, P3, P2, P1, I3, I2 I1, I1 I2 I3, C, P1, P2, P3, P4, M1, M2 umhlathi ongezansi M3, M2, M1 , P4, P3, P2 , P1, I3, I2, I1, I1, I2, I3, C, P1, P2, P3, P4, M1, M2, M3

Uma uyichaza ngamagama alula, khona-ke emhlathini ophezulu wenja kukhona ama-incisors angu-6, ama-canines angu-2, ama-premolars angu-8, ama-molars angu-4, emhlathini ophansi - ama-incisors angu-6, ama-canines angu-2, ama-premolars angu-8, ama-molars angu-6.

 Kodwa-ke, ifomula yamazinyo yamazinyo obisi ezinja ibonakala ihlukile, ngoba. i-premolar ye-P1 ingeyomdabu futhi ayinaso isandulela esincibilikayo. Futhi, i-M molars ayinazo ezandulela zobisi. Ngakho-ke, uma ubhala ifomula yamazinyo yamazinyo obisi, kubonakala kanje: Ifomula yamazinyo yezinja ngaphambi kokushintsha amazinyo limi kanje: umhlathi ongaphezulu: 3P 1C 3I 3I 1C 3P - amazinyo angu-14 umhlathi ophansi: 3P 1C 3I 3I 1C 3P – 14 amazinyo noma umhlathi ongenhla : P4, P3, P2, C, I3, I2, I1 I1, I2, I3, C, P2, P3, P4 umhlathi ongezansi: P4, P3, P2, I3, I2, I1 I1 , I2, I3, C, P2, P3, P4  

Ukushintsha kwamazinyo ezinjeni

Ukushintsha kwamazinyo ezinjeni kwenzeka ngokwesilinganiso lapho eneminyaka engu-4 izinyanga. Futhi kwenzeka ngokulandelana okulandelayo: 

 Qaphela: Ama-premolars nama-molar angenawo ama-antecedent ancibilikayo akhula futhi ahlale phakade. Kuyaphawuleka ukuthi ezinye izinhlobo zezinja zinezici. Isibonelo, i-premolar ayikhuli. Noma ama-molars akhula lapho kushintsha amazinyo, kodwa awaphuki. Kulokhu, kufanelekile ukuthintana nodokotela wamazinyo futhi usebenzise ukukhishwa kwamazinyo obisi. I-Polydontia ne-oligodontia ingabonisa ukungalingani kwezakhi zofuzo, ukudla okungalungile noma izifo zangaphambilini (i-rickets, ukuntuleka kwe-calcium), ngoba cishe zonke izinja zinefomula engu-6 * 6 ye-incisor ezingeni lofuzo. Futhi ukuluma kubalulekile. Izinhlobo eziningi kufanele zibe ne-scissor bite, kodwa kunezinhlobo lapho ukulunywa kwe-undershot kuyinto evamile (brachycephalic).

Ifomula yamazinyo yezinja: inhloso yohlobo ngalunye lwamazinyo

Manje ake sikhulume kabanzi ngenjongo yohlobo ngalunye lwamazinyo. bezihlahla – Yenzelwe ukuluma izicucu ezincane zenyama. fangs - zenzelwe ukuklebhula izingcezu ezinkulu zenyama, futhi umsebenzi wazo obalulekile uyisivikelo. Ama-molars nama-premolars – yakhelwe ukuchoboza nokugaya imicu yokudla. Kuyaqapheleka ukuthi amazinyo anempilo kufanele abe mhlophe ngaphandle kwe-plaque futhi abe mnyama. Njengoba izinja zikhula, ukuguga kwamazinyo kuyamukeleka. Ingase isetshenziselwe ukunquma iminyaka elinganiselwe yenja.