Los Angeles Root Canal Specialists
Introduction A root canal is the anatomic space within the root of a
tooth. Part of a naturally occurring space within a tooth, it consists of the pulp chamber (within the coronal part of the tooth), the main canal(s), and more intricate anatomical branches that may connect the root canals to each other or to the surface of the root. Root canals presenting an oval cross-section are found in 50%-70% of root canals.
In addition, canals with a "tear-shaped" cross section are
common when a single root contains two canals (as occurs, for example, with the additional mesial root seen with the lower molars), subtleties that can be more difficult to appreciate on classical radiographs. Recent studies have shown that use of cone-down CT can detect accessory canals that would have been missed in 23% of cases, which can in turn lead to apical periodontitis. The upper molars, in particular, are predisposed to have an occult accessory canal in nearly half of patients. When rotary nickel titanium (NiTi) files are used in canals with flat-oval or tear-shaped cross sections, a circular bore is created due to the rotational action of the metal.
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