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Table 2 Summary of the trueness, precision, inter-implant distance deviation and angle deviation of every impression technique for parallel and divergent implants model

From: Accuracy of digital impressions versus conventional impressions for 2 implants: an in vitro study evaluating the effect of implant angulation

  Parallel implants model Divergent implants model p values between parallel implants and divergent implants models
  NSP SP TS MT TD NSP SP TS MT TD NSP SP TS MT TD
Trueness
Mean (μm) 87.4 70.6 50.2 65.7 84.5 198.7 120.9 74.7 76.6 112.3 0.003 0.09 0.06 0.40 0.21
SD (μm) 42.4 26.8 28.2 31.2 40.3 94.2 84.5 27.2 25.2 53.7
p values All groups = 0.12 All groups < 0.001      
  NSP vs SP = 0.065 NSP vs TS = 0.001
  NSP vs MT = 0.001 NSP vs TD = 0.031
  SP vs TS = 0.49 SP vs MT = 0.53
  SP vs TD = 0.99 TS vs MT = 0.99
  TS vs TD = 0.68 MT vs TD = 0.72
Precision
Mean (μm) 105.6 119.4 56.7 99.8 119.5 169.3 137.4 84.6 129.0 131.2 <0.001 0.15 <0.001 0.09 0.48
SD (μm) 46.3 56.7 24.8 47.7 68.5 95.9 59.7 40.7 104.0 87.5
p values All groups < 0.001 All groups < 0.001      
NSP vs SP = 0.70 NSP vs TS < 0.001 NSP vs SP = 0.34 NSP vs TS < 0.001
NSP vs MT = 0.98 NSP vs TD = 0.70 NSP vs MT = 0.13 NSP vs TD = 0.17
SP vs TS < 0.001 SP vs MT = 0.36 SP vs TS = 0.02 SP vs MT = 0.99
SP vs TD = 0.99 TS vs MT = 0.001 SP vs TD = 0.99 TS vs MT = 0.07
TS vs TD < 0.001 MT vs TD = 0.36 TS vs TD = 0.05 MT vs TD = 0.99
Inter-implant distance deviation
Mean (μm) 36.6 35.8 42.8 24.7 92.4 59.1 41.4 72.1 34.7 98.2 0.33 0.65 0.06 0.44 0.83
SD (μm) 25.0 21.9 28.2 22.4 79.4 66.3 32.7 36.0 33.5 33.1
p values All groups < 0.001 All groups = 0.01      
NSP vs SP = 0.99 NSP vs TS = 0.99 NSP vs SP = 0.88 NSP vs TS = 0.96
NSP vs MT = 0.96 NSP vs TD = 0.004 NSP vs MT = 0.70 NSP vs TD = 0.25
SP vs TS = 0.99 SP vs MT = 0.97 SP vs TS = 0.49 SP vs MT = 0.99
SP vs TD = 0.003 TS vs MT = 0.84 SP vs TD = 0.03 TS vs MT = 0.30
TS vs TD = 0.001 MT vs TD = 0.001 TS vs TD = 0.65 MT vs TD = 0.01
Angle deviation
Mean (°) 0.5 0.3 0.3 0.3 0.3 0.8 0.4 0.3 0.4 0.4 0.003 0.23 0.95 0.07 0.14
SD (°) 0.2 0.2 0.1 0.1 0.1 0.2 0.2 0.1 0.1 0.1
p values All groups = 0.02 All groups < 0.001      
NSP vs SP = 0.10 NSP vs TS = 0.02 NSP vs SP < 0.001 NSP vs TS < 0.001
NSP vs MT = 0.03 NSP vs TD = 0.03 NSP vs MT < 0.001 NSP vs TD < 0.001
SP vs TS = 0.53 SP vs MT = 0.73 SP vs TS = 0.04 SP vs MT = 0.76
SP vs TD = 0.65 TS vs MT = 0.61 SP vs TD = 0.44 TS vs MT = 0.03
TS vs TD = 0.77 MT vs TD = 0.83 TS vs TD = 0.08 MT vs TD = 0.60