Kliniczna ocena średnicy kanału korzeniowego w odcinku przywierzchołkowym w zębach ze zmianami okołowierzchołkowymi i bez nich
Apical dimension of root canal clinically assessed with and without periapical lesions
The significance of cleaning and shaping root canals properly for successful endodontic therapy is well established. Three parameters are considered critical: the length of the canal preparation in relation to the root apex, the so-called working length, its taper, and the horizontal dimension of its most apical extent [1-7]. To achieve the desirable shape it is essential that the cross-sectional diameter of the finished canal preparation gradually decreases towards the root canal terminus [2, 3]. This geometrical shape is necessary to ensure a correct action of the endodontic instruments, obtain the most effective cutting action against the canal walls and, at the same time, determine the conditions for a correct fit of the tapered master cone of gutta-percha. By balancing the shaping of the canal to its anatomy we can instrument the root canal, reducing the risk of overpreparation, especially in the apical region, and create the conditions for an accurate mechanical cleaning and aid the action of the irrigant solution [8-11]. In order to guide the instrumentation to give an adequate shape, it has been considered important to establish the apical diameter with the aid of a root canal instrument [12-16]. However, some authors question the potential of getting an accurate recording and sustain the fact that this measurement is generally lower with respect to the true dimension of the root end portion [4, 5]. Especially in [...]
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