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PubMed1979

Instrumentation of finely curved canals.

The conclusion to be reached should not be that one method of enlargement is better than another in finely curved canals, or that one filling material is better than another but rather that all materials and methods have strong points and weak points which should be taken into consideration when endodontic therapy is performed. The stepback enlargement technique is probably the best technique for enlarging finely curved canals, but problems may be experienced with it also if careful procedures of instrumentation and cleansing are not followed. If these factors are kept in mind it will help us to provide the highest possible quality of endodontics.

Dental Instruments↗
PubMed1979

[Endodontics--a literature review. Continuation of part II].

A survey of physical and biological properties of well-known root canal filling materials are discussed and the following conclusions were drawn: --No root canal filling material fulfils all requirements of an ideal sealer. Those materials, which perfectly seal the root canal and also show minimal periradicular tissur reaction, are recommended in Endodontics. --During setting time, all sealers are more or less toxic to the periradicular tissue. Materials which contain paraformaldehyde and lead exhibit a strong and persistent toxicity. --The tissue reaction of root canal filling materials is only slight when the root canal is underfilled. Ideally, in vital cases, the root canal should be filled to the dentine-cemental junction (approx. 1 mm short of the apex), in necrotic cases to the apical foramen. --Neither a root canal cement nor a guttapercha cone will perfectly seal a root canal alone. The combination of the two materials is recommended. --Silver cones are indicated only in narrow, tortuous canals. --Success of root canal therapy depends on various factors, primarily however on thorough root canal débridement.

Cells, Cultured↗