Paediatric dentistry

Paediatric dentistryPaediatric dentistry

Phantom coursePhantom course

Tapes of mineralization temporary teeth in antenatal period, weeks (Vinogradova T.F.).

8 years and 9 mouth

9 years and 9 mouth

10 years and 9 mouth

Fig. 26. Follicle 35, in which not yet started process of mineralization, stay between roots 75. It is a round form, limited

from spongy liquid of body of jaw by cortical plate.

Fig. 28. Prolonged mineralization of occlusual tuberculos 45.

Fig.15 45 is cutting. Its root is forming on 2/3. Roots chanal very wide, sprout zone is limited by cortical plate.

TeethMineralization of

crown, mouth of life

To cut of teeth,Mouth of life

І 1-2 6-8

II 3-4 8-12

III 5-9 16-20

IV 6 12-16

V 12 22-30

Table.1 Evolution of temporary teeth(Homenko L.О., 1993)

Таб.2 Етапи розвитку кореневої системи тимчасових зубів

TeethTimes of forming

of rootsTime of start of rezorbtion

of roots and to 1/2 longs,

Time of full rezorbtion of

roots,

years years years

І 1,5 3,5-5 5,5-6,5

II 2 4-5 5-7

III 4-5 6-7 8-9

IV 3-4 5-6 8-9

V 4 6-7 8,5-9

Таб.3 Periods of forming of permanent teeth (Хоменко Л.О., 1993)

Teeth Period of forming of follicle

Starting of mineralization

Periods of cutting,years

Finished of Forming of

roots,years

1 8 mouth. intranatal development.

6 mouth 6-8 10

2 8 mouth. intranatal development.

9 mouth 7-9 10

3 8 mouth. intranatal development.

6 mouth 10-12 13

4 2 years 2,5 years 9-10 12

5 3 years 3,5 years 10-11 12

6 6 mouth. intranatal development.

9 mouth. intranatal development.

6 10-11

7 3 years 3,5 years 12-13 15

8 4-5 years 6 years variable variable

Fig.12 Forming of root 46. Roots almost come to normal long, but roots to stay yet very wide. Stage of not formed apex of root.

Fig.14 Crown 45 calcified full. Forming of neck of tooth. Folicle 45 to become longer.

Fig.15 45 is cuted. Root formed on 2/3. Root chanal very wide, sprout zone is limited by cortical plate.

Fig. 48. Roots 37 is normal long, but chanal is very wide. Apical open is wide —period of reformatting apex.

Fig. 49. Root chanals 47 has different wide: bigger near crown of tooth and smaller near apexes. Period of not closed apex.

Fig.21 Roots of temporary 52, 51, 61, 62 by comparison with permanent teeth are short, cavity of teeth and root chanals are

wide.

Fig..20. Roots 75 short by comparison with permanent teeth , wide

disperse in sides. Begin their rezorbtion after start to grow of folicle 35.

Fig. 58. Full rezorbtion of roots of temporary teeth.

Fig.50 Medial root 75 desorbed. II type of rezorbtion at Vinogradova Т.F.

Fig. 56 Roots 64 desorbed.

Fig. 222. Big part of destruction of bony fabric near apexes of roots. In result of inflammation process in periodont 85 resorbted part of

cortical plate of folicle 45.