Ridge Deficiency

The goal of this clinical trial is to learn if shell technique is useful for implant placement site preparation in adults. The main questions it aims to answer are: Does using xenograft in this technique can reduce the amount of bone harvested from intra oral sites and reduce postoperative complications while offering enough bone to support endosseous implants with long term success? Researchers will compare autogenous bone blocks to xenograft bone blocks in the shell technique ridge augmentation. Participants will undergo ridge augmentation surgery, then have implants placed in the augmented area, then receive implant supported restorations afterwards.