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Table 3 Comparison of bone loss and PTV by variable

From: Narrow-diameter implants with conical connection for restoring the posterior edentulous region

  Number of implants Bone loss mean (SD) p value PTV mean (SD) p value
Bone quality    0.967   <0.001
 Soft 13 0.15 mm (0.376)   −2.323 (0.208)a  
 Normal 37 0.15 mm (0.423)   −3.273 (0.266)b  
 Hard 48 0.13 mm (0.375)   −3.562 (0.335)c  
Location    0.402   <0.001
 Maxilla 42 0.18 mm (0.439)   −2.979 (0.514)  
 Mandible 56 0.11 mm (0.351)   −3.522 (0.335)  
Loading period    0.715   0.014
 Over 1 year 22 0.08 mm (0.282)   −3.125 (0.518)a  
 Over 2 years 19 0.21 mm (0.535)   −3.095 (0.424)a  
 Over 3 years 34 0.16 mm (0.439)   −3.409 (0.452)b  
 Over 4 years 23 0.11 mm (0.259)   −3.465 (0.508)b  
Splinting status    0.407   0.968
 Yes 68 0.16 mm (0.418)   −3.295 (0.519)  
 No 30 0.08 mm (0.245)   −3.290 (0.406)  
Reason for tooth loss    0.314   0.559
 Periodontitis 89 0.13 mm (0.384)   −3.285 (0.514)  
 Caries 9 0.29 mm (0.488)   −3.400 (0.224)  
  1. T test or general linear model
  2. SD standard deviation, PTV Periotest value
  3. a, b, cResults from multiple comparisons using the general linear model