PMC3915396_01
(a) Pre-operative radiograph. (b) Working length determination. (c) Master cone radiograph
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F1
Clinical examination revealed a large amalgam restoration with secondary caries on both first and second maxillary left premolars [Figure 1a]. Mini apex locater (J. Morita, Japan) which was confirmed later with radiographs [Figure 1b] The cleaning and shaping was done with crown down technique with Protaper Rotary instruments (Dentsply Maillefer) as per the manufacturer's instructions using 17% of ethylenediaminetetraacetic acid (Glyde, Dentsply) as lubricant and 5.2% of sodium hypochlorite as irrigant. The master cone radiograph was taken [Figure 1c] and the root canals were then obturated using F2 Protaper Gutta-percha (Dentsply Maillefer) using AH plus resin sealer (Dentsply, Detrey) and post obturation radiograph was taken [Figure 2a].
(a) Post-obturation radiograph. (b) at 1-year follow-up radiograph. (c) 1-year follow-up radiograph (mesial angulation)
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F2
The master cone radiograph was taken [Figure 1c] and the root canals were then obturated using F2 Protaper Gutta-percha (Dentsply Maillefer) using AH plus resin sealer (Dentsply, Detrey) and post obturation radiograph was taken [Figure 2a].