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International Journal of Implant Dentistry

Table 1 One-way ANOVA and post hoc Tukey test results for mean ± SD of the %initial RTL, %postload RTL, and %difference between initial and postload RTL between all groups

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

  %initial RTL %postload RTL %difference between initial and postload RTL
Mean ± SD
Subgroups
 GIA 24.9% ± 1.7 22.8% ± 2.9 − 2.7% ± 2.0
 GIB 25.1% ± 1.5 24.1% ± 1.3 − 1.3% ± 1.0
 GIIA 25.1% ± 1.3 30.6% ± 1.6 7.3% ± 0.7
 GIIB 25.9% ± 1.5 36.2% ± 3.1 13.9% ± 2.5
 GIIIA 25.9% ± 1.0 37.4% ± 2.9 15.6% ± 2.8
 GIIIB 25.9% ± 1.5 42.8% ± 5.6 22.9% ± 6.2
ANOVA
 F 1.5 88.0 153.9
 P value 0.1 < 0.001* < 0.001*
After value Tukey’s test
GIA GIB GIIA GIIB GIIIA
GIB 0.8     
GIIA < 0.001* < 0.001*    
GIIB < 0.001* < 0.001* < 0.001*   
GIIIA < 0.001* < 0.001* < 0.001* 0.9  
GIIIB < 0.001* < 0.001* < 0.001* < 0.001* < 0.001*
  1. − negative means decreased post loading RTL ratio (removal torque gain)
  2. *statistical significant differences (P <.05)
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