Combined use of xenogenous bone blocks and guided bone regeneration for three dimensional augmentation of anterior maxillary ridge: A case series

Background. bone augmentation ensures a favorable 3-dimensional position of implants. onlay grafting is one of the tech-niques in ridge augmentation, which can be performed with the use of xenogenous blocks.methods. three cases of the vertical and horizontal ridge are discussed, which were augmented using xenogenous blocks. the blocks were shaped in a favorable size and puzzled along the grafting area. all the gaps were filled with granular xeno-grafts. the flaps were coronally advanced to obtain primary closure.results. an average of 4.2-mm gain in width and 4.2-mm gain in height of the ridge was observed at the implantation stage.conclusion. the outcomes of these cases could pave the way for suggesting xenograft blocks for augmenting wide areas of the alveolar ridge on average of 4 mm in width and height in selected cases as an alternative to standard autogenous blocks. long-lasting xenograft ensures implant and lip support in the esthetic zone.