There is no one implant system present that is ideal for every condition. Implant design research has been based on increasing the bone implant contact area or functional surface area in order to increase the implant stability and implant survival in poor density bone. Designing of an implant include both Macroscopic and Microscopic features. Macroscopic features include crest module, implant thread geometry and apical design of implant whereas Microscopic features include surface modificationS. This article reviews elements of various dental implant designs currently in use.