Along with the rapid development of the dental implantology, there are a lot of new theories and new discovery in the design of the implant itself and the osteointegration process on the interface of the implant-bone. In this paper, platform switching bone preservation technique, theory of contact osteogenesis and distance osteogenesis in the interface of implant-bone are introduced. The relationship of these new techniques, and the theory with the implant design and the surgical consideration are discussed.
