One-Year Survival Rate Outcomes of Innovative Dental Implants: A Prospective Clinical Study Dana Piek, DMD,* Shiri Livne, DMD,* Noga Harel, DMD,* Henriette Lerner, DMD,† Ady Palti, DMD,‡ and Zeev Ormianer, DMD§ I mplant geometry and design is one of the main features for implant success, concerning both implant body and implant collar. Diverse implant designs are available; each one is advocated for improving bone to implant contact and reducing crestal bone resorption by minimizing biome- chanical stresses to the bone. 1–5 Implant macro geometry contributes to primary stability at implant insertion phase, whereas thread design and sur- face condition play a role in secondary healing process. There are 2 major macro design concepts: cylindrical and tapered. At the time of insertion, the tapered root-form implant design generates an intimate contact between the osteotomy wall and the implant surface. 1–3 The tight bond provides excellent primary stability but under- goes localized bone necrosis near the implant surface before bone apposition ensures its biomechanical fixation. The drilling sequence using straight drills for the osteotomy after insertion of tapers implant body has a major effect on bone and implant contact ratio. Cylindrical parallel wall implants tend to be less stable at insertion but gain stability rapidly due to early formation of woven bone after the blood-clotted gap between the implant and osteoto- my wall. 6,7 Immediate placement of implants after extraction is a technique meant for shortening rehabilitation phase from the time of implant insertion to final resto- ration, sparing both time and surgical procedures. 8 The anatomical character- istics of the socket after tooth extraction are different from its environment after proper healing. Implants placed imme- diately into fresh extraction sites engage to the prepared bony walls only in their apex due to the funnel shape of the socket, whereas the coronal space is filled only by the end of the healing phase. 9 The tapered geometry diverts forces from the dense cortical bone to the resilient trabecular bone, 2 leading to higher forces in the apex, a desirable feature when considering immediate placement. In cylindrical implants, the loads are distributed throughout the implant, and because of the parallel wall, the coronal part of the osteotomy is damaged by the preceding implant threads, making a cylindrical implant less suited for immediate placement. 10–13 Immediate placement of an implant re- quires incorporation of advantages from each macro design, tapered implant’s compression ability of the apical portion, *Instructor, Department of Oral Rehabilitation, Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel. †Private Practice, Baden-Baden, Germany. ‡Clinical Professor, Department for Periodontology and Implantology, New York University College of Dentistry, New York, NY. §Lecturer, Department of Oral Rehabilitation, Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel. Reprint requests and correspondence to: Zeev Ormianer, DMD, Department of Oral Rehabilitation, Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel, Phone: +972-3-6124224, Fax: +972 (03)-6124226, E-mail: ormianer@post.tau.ac.il ISSN 1056-6163/13/00000-001 Implant Dentistry Volume 0  Number 0 Copyright © 2013 by Lippincott Williams & Wilkins DOI: 10.1097/01.id.0000434274.22605.b6 Purpose: The aim of this research was to evaluate an inno- vative implant design for different placement and loading protocols. The unique implant is a combina- tion of tapered and cylindrical shape, which is aimed to enhance initial stability and long-term osseointegration. Materials and Methods: Four hundred and sixty implants were placed in 141 patients under different placement and loading protocols in similarity to those encountered in a dental of fice. Implants were followed and evalu- ated for 1 year to assert the survival rate of the newly intro- duced implant. Results: The results showed a total of 97.4% survival rate, rang- ing from 92% to 98.6% depending on the different protocols. There was no statistical difference between the different protocol groups. Conclusion: The new implant design showed good results for 1 year of follow-up, comparable with the literature, and could be a good choice for every implant-based pro- cedure. (Implant Dent 2013;0:1–6) Key Words: tapered design, cylindri- cal design, osseointegration, loading protocols IMPLANT DENTISTRY /VOLUME 0, NUMBER 0 2013 1 Copyright Ó Lippincott Williams & Wilkins. Unauthorized reproduction of this article is prohibited.