PubMed ID (PMID): 17073359Pages 493-499, Language: EnglishRosenfeld, Alan L. / Mandelaris, George A. / Tardieu, Philippe B.Part 3: Stereolithographic Drilling Guides That Do Not Require Bone Exposure and the Immediate Delivery of TeethPrevious publications have reviewed the concepts of implant diagnostics and computerized tomographic imaging used together to create an atmosphere of collaborative accountability. The use of SimPlant software in combination with stereolithographic medical modeling facilitates the fabrication of surgical drilling guides, which assist in precise placement of dental implants. In this article, the use of gradient density scanning appliances will be discussed. This type of scanning appliance allows tooth- or mucosa-supported surgical drilling guides to be fabricated and used for implant placement without bone exposure. The use of the SAFE System will be introduced, along with its application in simplifying the immediate-loading prosthesis concept, which can often bypass the need for traditional dental impressions.