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Table 3 Radiographic parameters: mean crestal bone loss in mm and the difference in mean crestal bone loss in mm at different time points

From: The influence of laser-microgrooved implant and abutment surfaces on mean crestal bone levels and peri-implant soft tissue healing: a 3-year longitudinal randomized controlled clinical trial

  Baseline (6 weeks post-restoration) P value 1 year post-restoration (mm) P value 3 years post-restoration (mm) P value
MCBL (mm)
 Control (10) NA 1.08   1.93 < 0.001**
 Test (10) NA 0.76 0.61 = 0.74
    < 0.04*   < 0.001**  
Difference in MCBL (mm)
 Control (10)      − 0.85 < 0.001**
 Test (10)      + 0.15
  1. MCBL mean crestal bone loss, NA not applicable
  2. *Statistically significant
  3. **Statistically significant