The Effect of IPD on Lateral Bone Augmentation

In this group, a bone level implant (Straumann BLC, SLActive®, Roxolid, Straumann AG, Switzerland) will be placed in an ideal 3D prosthetically guided position to allow for a screw-retained restoration, following the manufacturer's protocol. Guided bone regeneration (GBR) will be performed simultaneously with the implant placement with the aim to re-establish the original bone contour as defined by IPD. A bovine bone mineral graft (Bio-Oss collagen®, Geistlich, Wolhusen, Switzerland) will be placed on the buccal aspect of the implant and covered with a collagen membrane (Bio-Gide®, Geistlich, Wolhusen). In the test group, bone augmentation will be performed by adding biomaterial 3 mm beyond the Individual Phenotypical Dimension (IPD) to achieve over-contour augmentation. IPD will be clinically defined during surgery by connecting the most labially prominent points of adjacent ridges at the level of the bone zenith of neighboring teeth.

In this group, a bone level implant (Straumann BLC, SLActive®, Roxolid, Straumann AG, Switzerland) will be placed in an ideal 3D prosthetically guided position to allow for a screw-retained restoration, following the manufacturer's protocol. Guided bone regeneration (GBR) will be performed simultaneously with the implant placement with the aim to re-establish the original bone contour as defined by IPD. A bovine bone mineral graft (Bio-Oss collagen®, Geistlich, Wolhusen, Switzerland) will be placed on the buccal aspect of the implant and covered with a collagen membrane (Bio-Gide®, Geistlich, Wolhusen). In the control group, bone augmentation will be performed by adding biomaterial up to the IPD line in order to achieve a contour augmentation with bone grafting remaining within the boundaries defined by the IPD. IPD will be clinically defined during surgery by connecting the most labially prominent points of adjacent ridges at the level of the bone zenith of neighboring teeth