2.4. Sample Size Calculation
G-power software (V.3.1.9.7, Kiel, Germany) was applied to calculate the sample size depending on the summary statistics of the mean changes of the horizontal alveolar bone width (1.30 ± 0.63 and 2.25 ± 1.71) for study and control groups, respectively, obtained from the pilot study and used to calculate the effect size, which was equal to 0.7038. This value was used based on two dependent means (two-tailed) with a significance level alpha set at 5% and power at 95%. This resulted in 16 subjects for each group with an added 10% dropout rate.