Talha M Siddiqui, Aisha Wali, Noman Qamar.
Frequency of Two Canals in Maxillary Premolars at a Dental Teaching Institution.
J Pak Dent Assoc Jan ;21(3):173-6.

OBJECTIVE The aim of the present study was to estimate the frequency of two canals in maxillary second premolars in patients from Gadap area attending Out Patient Department at Baqai dental College. METHODOLOGY The study included 100 patients requiring root canal therapy, out of which 32 were females and 68 weremales. Two periapical radiographs were taken at different angulations, numbers of canals were visible on the X-ray were recorded and then verified clinically upon access opening. Frequency and percentages was analyzed by using SPSS 19.0 RESULT We observed type-I canal configuration in16%, type II in 49%, type III in 12%and type IVin 23%. CONCLUSION It is concluded that the occurrence of two canals in maxillary premolars was high in our study population.Type II canal configuration is themost prevalent among our sample followed by type IVand type I

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