Background. Nowadays there are many ideas to achieve High success and reliable treatment surgeries for bothpartially and totally edentulous patient. The aim of this review to compare accuracy and advantages of Computer guided navigation system vs conventional free hand method. Methods. This review has been done by searching in electronic data bases including PubMed and scopus with these key words” Computer Assisted surgery” , “ navigation implant surgery” , “ dynamic navigation implant” , “ static navigation implant” . Results. In navigation surgery for dental implants the two approaches; dynamic and static were introduced. The static navigation refers to use of surgical templates for the bone implant drilling. Dynamic navigation is used to monitoring through a three_dimentional softwar of the bone drilling and implant placment following the preoperative plane, while the freehand implant placement requires no guided stents. Through Computer guided surgery it possible to reduce deviation and differences between the preoprative CBCT images and measurements from final treatment outcome. Also, the CAS method is usefull in cases with complications like proximity of inferior alveolar nerve. Conclusions. A number of statistically singnificant were found in comprison. In Computer Assisted group indicate no implant fails, reduce of post surgical pain and swelling. And the mean marginal bone loss decreased.