Errors that occur when filling the root canal with hardening filling materials
1. Wrong choice of filling material leads to poor filling of the root canal with its sealing. This violates the root filling and sealing leads to inflammation in the periodontium. Mistake is also to use materials that can lead to discolouration of the tooth crown (materials based on resorcinol-formalin) in the frontal teeth.
2. Incorrect method of filling of root canal. Errors can occur during preparation of the filling material. The slightest violation of the manufacturer’s instructions leads to significant changes in the quality of filling material. Inadequate drying of the root canal at sealing is a common mistake, or even getting into the saliva. Violation of sealing methods can also lead to insufficient quality root filling or violate the integrity and appearance of periodontitis.
3. Derivation of filling material by the tip of the tooth. Derivation of filling material by the tip of the tooth. This occurs if the doctor does not take into account the volume of the root canal and the volume injected into a filling material. This leads to periodontitis, sinusitis, neurological diseases (neuritis).
4. Filling of canal done without regard of the working length of the tooth resulting in poor obturation of the root canal or excretion of material in the root apex. During filling canal filler output for apical hole or does not reach the top of the physiological. Often leads to it is also not able to use canal filler.
5. Incomplete filling of the root canal with filling material.In the remainder, the material unfilled space will quickly penetrate tissue fluid and microorganisms. This leads to inflammation in the periodontium (periodontitis).
6. Mistake leading to interrupted obturation of canal is to move canal filler when not working drill machine. In this case, the material is removed from the canal with canal filler.
CONTROL QUESTIONS:
1. Types of filling materials for root canal.
2. Requirements for root canal filling materials.
3. Classification of filling materials for root canals.
4. Plastic hardening filling materials (sealers), their group.
5. Composition and properties of hardening filling materials for root canal.
6. Techniques of filling of root canals with hardening materials.
7. Mistakes and complications in the wrong fillings of root canals.
Homework:
For independent out-of-class work
1. Written out in album the group of hardening plastic filling materials for root canals.
2. To describe techniques of filling root canals.
Tests for self-monitoring and self-correction the original level of knowledge:
1. What groups of physico-chemical properties are divided filling materials for root canal?
A. Calcium containing not hardening and hardening paste,
B. Cements, glass ionomers,
C. Non hardening plastic, hardening plastic, solid (pins),
D. Pasta with antiseptic paste with calcium, paste with zinc oxide,
E. Pastes based on epoxy resins, resorcinol-formaldehyde, zinc oxide-eugenol.
2 For what are used non hardening plastic filling materials for root canals:
A. For the temporary filling of root canals
B. For root canal filling permanent and deciduous teeth
C. For root canal permanent teeth
D. For root canal of deciduous teeth
E. For use with pins.
3. What are sealers?
A. Plastic filling materials to fill the root canal.
B. Plastic filling materials, which fill the space between the pins (gutta-percha, etc.) and the wall of the root canal.
C. Not harden plastic filling materials to fill the root canal.
D. Hardening plastic filling materials to fill the root canal.
E. Filling materials for filling root canal.
4. What are the fillers?
A. Filling materials for filling the root canal.
B. Plastic filling materials to fill the root canal.
C. Not harden plastic filling materials to fill the root canal.
D. Hardening plastic filling materials to fill the root canal.
E. Solid filling materials, which fill up most volume of the root canal.
5. Which cement is used for filling root canal?
A. Zinc phosphate, zinc-eugenol, glass ionomer cements.
B. Zinc phosphate, silicate, glass ionomer cements.
C. Zinc phosphate, zinc-eugenol cements, silicate.
D. Zinc phosphate, silica-phosphate, glass ionomer cements.
E. Polycarboxylate, silicate, glass ionomer cements.
6. Filling material for root canals must have the property:
A. Have a cytotoxic effect on periodontal tissue.
B. Be soluble in tissue fluid.
C. Hermetically obturate root canal.
D. Not affect the regeneration of periodontal tissue.
E. Irritate the diseased periodontal tissue.
7. Filling material for root canals must have the property:
A. easily dissolves
B. Suppress the regeneration of periodontal tissue
C. To fill the root canal by 2/3 of its length
D. Do not paint the hard tissues of the tooth
E. Semi-hermetic obturate root canal
8. Filling material for root canals must have the property:
A. Do not stick to the walls of the root canal.
B. Not change volume during solidification.
C. No increase in volume during solidification.
D. Do not harden in the root canal.
E. Semi-hermetic obturate root canal.
9. What a filling material for root canals can change the color of the tooth:
A. Colophony-novoimanin paste
B. Polycarboxylate cement
C. Zinc-eugenol cement
D. Resorcinol-formalin paste
E. Phosphate cement
10. What is the main disadvantage of zinc phosphate cement for root canal treatment?
A. Cytotoxic to periodontal tissue
B. Solubility in the interstitial fluid
C. Very hard refill root canal
D. Lack of stimulation of tissue regeneration of periodontal
E. Causes necrosis of periodontal tissue
11. What filling materials are using for filling good passable root canals?
A. Not hardening plastic pastes,
B. Pins (fillers) in complex with hardening plastic pastes (sealers),
C. Resorcinol-formalin paste
D. Gutta-percha
12. For hardening plastic filling materials for root canal include:
A. Amalgam,
B. Silico-phosphate cement,
C. Gutta percha,
D. Zinc-eugenol cement,
E. Silicate cement.
13. In the composition of what hardened filling materials for root canals put antiseptic and corticosteroids:
A. Glass ionomer cements,
B. Zinc phosphate cements,
C. Resorcinol-formaldehyde paste,
D. Zinc-eugenol cement,
E. Material based on epoxy resins.
14. Root canal filling plastic materials carried out by c:
A. Pulp extractor
B. Canal filler
C. Probe
D. H-file
E. Smoother
15. Root canal filling paste has one drawback:
A. Not reliable root canal obturation
B. Poor adhesion to the walls of the canal
C. Resistance to tissue fluid
D. The absence of X-ray contrast
E. Violation of plasticity when administered into the root canal
16. In case of incomplete filling of root canal filling material:
A. There is no changes in periodont
B. Change in the color of the tooth crown.
C. Tightness of the root canal is not broken
D. There is inflammation in the periodont
E. Develop of secondary caries