The success of dental implants is influenced by the amount of bone surrounding the implant. The design of the implant collar, particularly the reverse conical neck design, can affect bone remodelling. This design is thought to reduce bone loss, redistribute stress, and improve soft tissue health and also provide the bone ring formation on crest module.  Matteo Danza, Chieti/Italy,(2009) conducted a study in which The concept of platform switching (PS)  can be successfully applied together with immediate loading as demonstrated in case series and histo-morphometrical evaluation in man. Starting from the platform switching  idea, this study elaborated the concept of Bone Platform Switching (BPS). The BPS is obtained by using dental fixture with a reverse conical neck. This type of implant gives an increased residual crestal bone volume around the implant neck and carries several advantages: a reduced mechanical stress in the crestal alveolar bone area, the repositioning of gingival papillae on the bone ring (that is the physiological condition), and a proper vascular supply to hard and bone tissue also in case of reduced inter-implant space. To verify if the concept of BPS really gives some advantages to reverse conical neck implants a retrospective analysis was performed on a case series of RCN implants. This study aims to compare the cresta bone loss and soft tissue health around standard neck implants and reverse conical neck implants to determine the effectiveness of the reverse conical design in preserving crestal bone and soft tissue.