Abstract:Present study was conducted to evaluate the accuracy of Electronic Apex Locator to measure the root canal length in presence of blood, an unavoidable event during extirpation of vital pulp. A number of sixty (60) previously untreated extracted human maxillary and mandibular permanent mature anterior teeth having more or less straight roots with single root canal were included in the study. Root canal lengths were measured using a no. 15 k-file (Mani Inc, Tokyo Japan) in all the teeth until it was just visible through apical foramen that was confirmed by viewing them in Stereomicroscope. The measurements obtained by the Stereomicroscope of all teeth were consider as the 'Gold standard' and was also consider as the actual length of those teeth. Using an Electronic Apex locator (Foramatron D 10, Percell, USA) was used to measure the canal length of the same sixty teeth introducing human blood into the canal. Now the measurements taken by Electronic Apex locator (EAL) in presence of blood were compared with the actual length taken by the stereomicroscope and difference in the error length compared with stereomicroscopic length were calculated in a range from -0.5mm to >1 mm. It was observed that working length measurements by EAL in presence of blood within canal mostly remain within clinically acceptable range (± 0.5 mm).
Introduction:Determining root canal length with accuracy is a crucial factor for success of root canal therapy. Errors in determining root canal length result in instrumentation short of the canal terminus, allowing pulp tissue and necrotic debris to remain in the canal. Faulty working length can also lead to instrumentation longer than the canal terminus thus destroying the delicate apical region. The literature suggests that the preparation and obturation of the root canal should be at or short of the apical constriction. 1 To attain this objective the endpoint of the root canal system and the canal terminus, should be detected as precisely as possible during preparation of the canal.
Dens invaginatus is a developmental malformation of teeth with the enfolding of enamel and dentin into the pulp chamber and sometimes into the root that most commonly affects the maxillary lateral incisors. This anomaly may increase the risk of pulpal disease and can potentially complicate treatment due to its aberrant anatomy, thus posing a diagnostic challenge. Similarly, the incomplete elimination of the invagination and debridement may create dead space within the canal leading to the failures. This case reports the endodontic management of the Oehler’s type II Dens invaginatus.
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