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Table 1 Median and interquartile range \( \overset{\sim }{m} \)(iqr) of the alveolar bone width at baseline 1 (pre-extraction) and baseline 2 (before delayed dental implant placement) and after 10 years for sites with porcine bone graft (A) and collagen sponge (B)

From: Bone remodeling around implants placed after socket preservation: a 10-year retrospective radiological study

   Alveolar width (AW) Change at the alveolar ridge (ΔAW) Intragroup analysis (p value)
Group N° bsl 1 bsl 2 10 years bsl 1→bsl 2 bsl 2→10 years bsl 1→10 years bsl 1 vs bsl 2 bsl 2 vs 10 years bsl 1 vs 10 years
  Overall sites
A 30 10.9(2.3) 8.4(2.1) 9.4(1.6) − 2.7(0.9) + 1.3(1.1) − 1.3(1.6) < 0.0001 < 0.0001 < 0.0001
B 24 10.6(2.0) 7.1(1.1) 9.0(1.5) − 3.9(1.4) + 1.8(1.1) − 2.2(1.6) < 0.0001 < 0.0001 < 0.0001
Intergroup analysis
(p value*)
  0.8616 0.0032 0.1296 < 0.0001 0.0688 0.0863    
Effect of site
(p value^)
  < 0.0001 < 0.0001 0.0099 0.0176 0.6093 0.0086    
Effect of gender
(p value^)
  0.0442 0.0102 0.0448 0.7096 0.8234 0.8236    
  Premolar
A 16 9.8(0.7) 7.1(1.3) 9.1(1.4) − 2.8(1.0) + 1.5(1.5) − 1.3(1.7) 0.0004 0.0004 0.0004
B 13 10.2(0.8) 6.7(0.7) 8.3(1.4) − 3.3(1.1) + 1.7(1.4) − 1.5(1.5) 0.0002 0.0002 0.0002
Intergroup analysis
(p value*)
  0.5524 0.1349 0.2816 0.0562 0.8434 0.2190    
  Molar
A 14 12.1(0.3) 9.1(0.9) 9.9(1.8) − 2.7(0.5) + 1.0(1.7) − 1.8(2.0) 0.0001 0.0001 0.0234
B 11 12.1(0.6) 7.5(1.6) 9.4(1.2) − 4.6(0.6) + 1.9(0.7) − 2.7(1.1) 0.0009 0.0009 0.0009
Intergroup analysis
(p value*)
  1 0.0005 0.2743 < 0.0001 0.0061 0.2972    
  Premolar vs molar
A
(p value*)
  < 0.0001 < 0.0001 0.0209 0.06772 0.0612 0.0843    
B
(p value*)
  < 0.0001 0.0594 0.0395 0.0003 0.3102 0.0137    
  1. Results with significance in bold
  2. ^Non-parametric analysis of variance test (ANOVA Friedman test)
  3. *Mann–Whitney tests
  4. °Wilcoxon signed-rank test