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Table 4 Residual bone height (RBH), initial torque value (ITV), implant stability quotient (ISQ), treatment period, and failure by stage of implant placement

From: Immediate implant placement following tooth extraction with simultaneous lateral sinus augmentation: a retrospective clinical study after at least 1 year of loading

   Group  
Variable Overall (n = 35) 1-Stage (non-submerged) (n = 17) 2-Stage (submerged) (n = 18) p
RBH     
 Mean ± SD 5.62 ± 1.68 6.06 ± 2.11 5.19 ± 1.02 .1381
 Range 3.1-9.6 3.1-9.6 3.3-7.4  
ITV     
 Mean ± SD 30.14 ± 5.07 30.88 ± 5.66 29.44 ± 4.50 .2222
 Range 15-35 15-35 20-35  
 15 1 (2.9) 1 (5.9) 0 (0.0) .3423
 20 1 (2.9) 0 (0.0) 1 (5.6)  
 25 8 (22.9) 3 (17.6) 5 (27.8)  
 30 11 (31.4) 4 (23.5) 7 (38.9)  
 > 35 14 (40.0) 9 (52.9) 5 (27.8)  
ISQ     
 Mean ± SD 76.68 ± 7.41 81.94 ± 4.45 72.00 ± 6.32 <.0011
 Range 60-90 75-90 60-85  
Final impression (days)     
 Mean ± SD 180.47 ± 51.11 170.13 ± 53.70 189.67 ± 48.33 .2012
 Range 86-346 86-302 131-346  
Success or failure     
 Success 34 (97.1) 16 (94.1) 18 (100.0) .4863
 Failure 1 (2.9) 1 (5.9) 0 (0.0)  
  1. Values are either frequency with percentage in parentheses or mean ± standard deviation
  2. 1P values were derived from independent t test
  3. 2P values were derived from Mann-Whitney’s U test
  4. 3P values were derived from Fisher’s exact test
  5. Shapiro-Wilk’s test was employed for test of normality assumption