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Topicality: the success of the endodontic treatment definately depends on qualitative obturation of the root canal. The knowledge of peculiarities of filling the root canals of temporary and permanent teeth will allow to reach good clinical results of treatment.
Objective: to achieve the technique of filling root canals in children's temporary and permanent teeth at different stages of development of their roots.
Tasks:
1. To learn the classification of materials for root fillings, to know the requirement to materials for root fills, properties of materials which are used for filling root canals.
2. To be able to select the materials for a root fill depending on a stage of development of tooth root.
3. To achieve the technique of filling the root canals in temporary teeth at different stages of development.
4. To achieve the technique of temporary obturation of the root canals in permanent teeth with ungenerated roots.
5. To learn the ways of constant filling of root canals of permanent teeth.
6. To achieve the techniques of root canals obturation in permanent teeth with a method of one pin and cold lateral condensation.
Educational information:
Materials for root canals obturation (E.V.Borovsky and oth., 1998):
I. Plastic not hardening.
ІІ. Plastic hardening:
1) on the basis of oxide of zinc and eugenol: (Endomethasone, paste Rickert, Canason, Еоdеnt-normal, Tubliseal);
2) on a basis of calcium hydroxide: (SealApex, Apexit, Fosfadent-bio, Vitapex);
3) on the basis of polymers and pitches: (Diaket, Ah-26, AH Plus, Topseal);
4) on a basis of formalin phenol: (paste Riebler, Foredent, Sped Endoform);
5) on a basis of glass-inomers: (Ketac-endo, Endion, Endo-sen).
ІІІ. Firm fillers:
1) gutta-percha;
2) silver pins.
Requirements to the materials for root canals obturation:
1. The expressed adhesion to canals walls.
2. Widening of insertion in the canal and ejection from it.
3. Maintenance of sufficient hermetisation of the basic canal and its branches.
4. Spatial stability.
5. X-ray contrast.
6. Absence of shrinkage after hardening.
7. The small size of particles filler.
8. Absence of colouring the tissues of a tooth.
9. Bacteriastatic and ability not to be a nutrient for bacteria.
10. Slow hardening.
11. Insolubility in tissue liquids.
12. Absence of irritating action to the tissues.
13. Property of dissolution in some solvents for removal from canal.
14. Ability not to provoke the immune reaction.
15. Absence of mutagen and cancerogenic properties.
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