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Table 4 Effect of impression coping design and implant angulation on accuracy

From: The impact of impression coping geometrical design on accuracy of implant impressions: an experimental study

Impression technique Coping design Angulation Count Median IQR P value
Open tray High retentive (Osstem) Parallel 16 0.008 0.005 0.0166*
Non-parallel 16 0.016 0.010
Medium retentive (Straumann) Parallel 16 0.017 0.010 0.926
Non-parallel 16 0.015 0.026
Low retentive (SIC) Parallel 16 0.019 0.030 0.999
Non-parallel 16 0.020 0.029
Closed tray Triangular (Osstem) Parallel 16 0.026 0.042 0.423
Non-parallel 16 0.039 0.076
Rectangular (Straumann) Parallel 16 0.015 0.024 0.196
Non-parallel 16 0.016 0.022
Round (SIC) Parallel 16 0.028 0.037 0.616
Non-parallel 16 0.041 0.036
  1. *Mann-Whitney test, P value < 0.05 statistically significant