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A root canal is the naturally occurring anatomic space within the root of 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.
The post on the left is a tapered post, the one on the right is a parallel post. In post and core fabrication, it is desirable that the post descend at least two-thirds of the length of root canal (or not less than the height of the crown) in order to provide sufficient retention.
On the other hand, the root canal filling material may be extruded from the apex leading to other complications. [citation needed] The X-ray in the right margin shows two adjacent teeth that had received bad root canal therapy. The root canal filling material (3, 4, and 10) does not extend to the end of the tooth roots (5, 6 and 11).
Root canal treatment (blue arrows) carried out on the lower right first molar with temporary restoration in place Incision of an abscess above a front tooth and insertion of a surgical drain Odontogenic infection involving the buccal space. Above, deformation of the cheek on the second day.
Root canal treatment should be performed on the tooth if it is determined that previous therapy was unsuccessful. Removal of the necrotic pulp and the inflamed tissue as well as proper sealing of the canals and an appropriately fitting crown will allow the tooth to heal under uninfected conditions.
Internal resorption is defined by the loss of intraradicular dentin and tubular dentin from within the middle and apical thirds of the root canal(s). It may also present as an incidental, radiographic finding. Radiographically, a radiolucent area of uniform density within the root canal may be visible with well-defined borders.
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When I had root canal treatment, my dentist only gave me a little anesthetic and told me to tell him when it hurt - apparently this is how he knew he'd hit the end of the root canal. Apparently this "drill by feel" is or was a common technique, so the above passage doesn't seem very accurate to me. -- 203.52.130.136 04:21, 6 Apr 2005 (UTC)