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Table 1 Implant wall width measurements (mm) of IP and control samples at each reference point (n = 48)

From: Effect of crown to implant ratio and implantoplasty on the fracture resistance of narrow dental implants with marginal bone loss: an in vitro study

Reference point Control IP  
Mean (SD) Mean (SD) MD (95%CI) Independent samples t test
P value
ANOVA
P value
R1 (first thread)  
 2:1 3.44 (0.02) 3.03 (0.04) 0.41 (0.37–0.44) < 0.001* 0.103
 2.5:1 3.44 (0.01) 3.03 (0.04) 0.41 (0.38–0.45) < 0.001*
 3:1 3.45 (0.02) 3.08 (0.04) 0.37 (0.33–0.40) < 0.001*
R2 (tenth thread)  
 2:1 3.32 (0.03) 2.86 (0.03) 0.46 (0.42–0.49) < 0.001* 0.949
 2.5:1 3.31 (0.02) 2.86 (0.04) 0.45 (0.41–0.49) < 0.001*
 3:1 3.34 (0.03) 2.89 (0.06) 0.46 (0.41–0.50) < 0.001*
R3 (end of the prosthetic screw hole)  
 2:1 3.07 (0.03) 2.62 (0.06) 0.45 (0.40–0.50) < 0.001* 0.163
 2.5:1 3.07 (0.05) 2.64 (0.04) 0.43 (0.38–0.47) < 0.001*
 3:1 3.07 (0.02) 2.68 (0.04) 0.40 (0.36–0.43) < 0.001*
  1. *Statistically significant difference
  2. MD mean difference (Control—IP)