The incidence of double root canals was 15.1% (8/53) in the central incisors, and 30.2% (16/53) in the lateral incisors, but the difference did not reach statistical significance ( p = 0.063).
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A micro-computed tomographic analysis of the root canal systems in the permanent mandibular incisors in a Chinese population.
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0.0630
0.0630