Study variables
SECONDARY
Study variables were classified into patient, implant, and surgical technique variables.Patient’s variables were as follows: age, sex, implant position (second premolar/first molar/second molar), and bone quality (I/II/III/IV) according to the Lekholm and Zarb bone density criteria determined by resistance to drilling during socket preparation and considering the CBCT [Implant’s variables collected were length (≤8.5mm/>8.5mm) and diameter (narrow=3.3mm/standard=3.75–4mm/wide=4.5mm).The intervention variables were surgical technique used (underpreparation/expanders/conventional drilling) and insertion torque (<40 Nw/≥40 Nw) considered as secondary outcome variable. Finally, the initial ISQ was collected as primary outcome variable.