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The proximity of the root to the canal can be assessed radiographically and there are several factors which can indicate high risk of nerve damage: [21] Darkening of the tooth root where it crosses the canal [21] Deviation of the canal [21] Narrowing of the roots [21] Loss of the lamina dura of the canal [21]
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. [2] Surgical options for previously treated teeth that would not benefit from root canal therapy include cystectomy [12] and cystostomy. [12]
Tooth #5, the upper right second premolar, after extraction. The two single-headed arrows point to the CEJ , which is the line separating the crown (in this case, heavily decayed) and the roots. The double headed arrow (bottom right) shows the extent of the abscess that surrounds the apex of the palatal root.
The root canal filling material (3, 4, and 10) does not extend to the end of the tooth roots (5, 6 and 11). The dark circles at the bottom of the tooth roots (7 and 8) indicated infection in the surrounding bone. Recommended treatment is either to redo the root canal therapy or extract the tooth and place dental implants.
Thus, 97.7% of cases with a negative response to EPT indicated that a root canal treatment should be carried out. [22] Test cavity: The preparation of a test cavity involves cutting into the dentine of a tooth to determine whether the sensory element of the pulp is still functioning. Test cavity preparation is a last resort as this method is ...
It is a likely outcome of untreated dental caries (tooth decay), and in such cases it can be considered a sequela in the natural history of tooth decay, irreversible pulpitis and pulpal necrosis. Other causes can include occlusal trauma due to 'high spots' after restoration work, extrusion from the tooth of root filling material, or bacterial ...
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