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Table 2 Comparison of the mean distance from the tip of root canal filling to the radiographic apex in group I and group II in different subgroups.

From: Comparison between two methods of working length determination and its effect on radiographic extent of root canal filling: a clinical study [ISRCTN71486641]

Variable Group I Group II P value
   Number Mean SD Number Mean SD  
Tooth Position Premolar teeth 17 -0.5 0.6 19 -0.3 0.5 0.341
  Molar teeth 50 -0.4 0.5 57 -0.3 0.5 0.381
  Upper teeth 36 -0.5 0.6 55 -0.3 0.5 0.270
  Lower teeth 32 -0.4 0.4 29 -0.4 0.3 0.963
Tooth Status Vital 19 -0.6 0.6 24 -0.3 0.6 0.829
  Non- vital 48 -0.4 0.4 50 -0.4 0.4 0.152