**2.4 Recipient site**

The left recipient site was already exposed for bone block harvesting. The augmented bed was prepared by making grooves (slots, fissures) with either high speed straight thin bur, low speed small straight bur, or by the saw-shaped piezosurgery device, therefore, at the recipient site, three buccolingual grooves were made (**Figure 3a** and **b**). The number of the grooves is determined by the length of the augmented ridge, on the other hand, the depth of the grooves is limited by its distance from the inferior alveolar nerve which is measured on the dental CT scan. In general, the groove should be extended all the way from the buccal cortices to the lingual cortices, and as deep as possible in the recipient site residual bone. The main role of the groove in the WT is to give biological and mechanical retention of the bone wedge.
