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Table 3 Comparison between short and high collar length (A and B)

From: Effect of different angulations and collar lengths of conical hybrid implant abutment on screw loosening after dynamic cyclic loading

Collar length Subgroups T test
A (2 mm collar length) B (4 mm collar length) t P value
Initial RTV Mean ± SD 22.3 ± 0.4 22.3 ± 0.5 0.9 0.3
Postload RTV Mean ± SD 20.9 ± 1.9 19.6 ± 2.5 2.5 0.014*
Difference between initial and postload RTV Mean ± SD 1.4 ± 1.7 2.6 ± 2.3  
Paired test P value < 0.001* < 0.001*
  1. *statistical significant differences (P <.05)