2.5. Randomization and Masking
Eligible patients were randomly assigned to alveolar ridge preservation with ADB (study group) or unassisted healing (control group) using permuted block randomization with Microsoft Excel 2016 to achieve a 1 : 1 allocation ratio for the groups. All patients were equally prepared and operated on by the first investigator. At the same time, the second researcher was responsible for allocating participants into groups. After completing the dental extraction and processing of the extracted teeth, the second researcher revealed the intervention allocation to the investigator according to the generated sequence. All outcome assessors and biostatisticians were masked to treatment type. However, blinding of the investigator was not possible.