Skip to main content

Table 1 Comparison of mean removal torque values (Ncm) for the abutment screws in all groups

From: Implant-abutment screw removal torque values between customized titanium abutment, straight titanium abutment, and hybrid zirconia abutment after a million cyclic loading: an in vitro comparative study

Abutment/Number of cycles Mean removal torque value (Ncm) ± SD % of mean removal torque value loss compared to the initial Post hoc Dunnett’s T3 test of mean removal torque (P-value)
ST/0 HZ/0 CT/0 ST/50,000 HZ/50,000 CT/50,000 ST/1,000,000 HZ/1,000,000
ST/0 28.64 ± 0.63         
HZ/0 28.43 ± 0.52 1.000        
CT/0 27.44 ± 0.86 0.621 0.769       
ST/50,000 23.94 ± 1.70 19.63% 0.050 0.062 0.158      
HZ/50,000 23.23 ± 1.16 22.38% 0.003 0.005 0.011 1.000     
CT/50,000 22.46 ± 1.64 22.17% 0.013 0.017 0.030 0.991 1.000    
ST/1,000,000 23.71 ± 1.11 20.79% 0.004 0.006 0.019 1.000 1.000 0.988   
HZ/1,000,000 21.82 ± 5.60 30.29% 0.562 0.591 0.748 1.000 1.000 1.000 1.000  
CT/1,000,000 22.42 ± 2.46 22.39% 0.076 0.088 0.157 0.999 1.000 1.000 0.999 1.000
  1. ST straight titanium abutment, HZ hybrid zirconia abutment, CT customized titanium abutment