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Tidskrift

Sammanfattning

The mechanical instrumentation of the root canal system has often been described from two different conceptions: apical enlargement and cone preparation. Purely technical aspects have been in focus along the development of both techniques, but later the focus has gradually been directed towards microbiological disinfection aspects. Three dimensional analyses of root morphology have provided a better understanding of how the mechanical instrumentation falls short, in relation to the actual cleaning of the root canal. From a technical and disinfection view, the different instrumentation techniques including selection of a specific file system seem not to have significant impact. However, a systematic treatment procedure that can be described methodically in 4 phases is very important to reduce the risk of cyclic fatigue. The reciprocating systems better resist cyclic fatigue, and the mechanical instrumentation is performed more efficiently with these instruments. However, it is still a contribution from both the mechanical instrumentation and the disinfectant procedures that results in the best possible clinical outcome in patients with a necrotic infected pulp and apical periodontitis.

MeSH