Dental News - Three-year clinical and radiographic outcomes of patients treated according to the All-on-4 concept in the daily practice: A prospective observational study on implants and prosthesis survival rates and complications

Dr. Marco Tallarico et al.

Sun. 28. August 2016

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Objective: All-on-4 treatment concept is widely applied for complete-arch rehabilitations. Nevertheless, minor technical and biological complications can occur. The objective of this study was to evaluate the three-year clinical and radiographic data of complete-arch fixed dental prostheses supported by four implants according to the All-on-4 protocol.

Materials and methods: Thirty consecutive edentulous patients or patients with terminal dentition (18 females and 12 males; mean age of 67.4 years), with a preference for implant-supported complete-arch screw-retained fixed dental prostheses, were enrolled and treated according to the All-on-4 protocol between January 2008 and December 2011. The outcomes evaluated were implant and prosthesis survival and success rates, any technical and biological complications, periimplant marginal bone loss and patient satisfaction.

Results: One hundred and twenty regular platform implants were placed. No patients dropped out. One implant failed two months after placement, resulting in a cumulative implant survival rate of 99.2%. No definitive prostheses failed. Eight technical and three biological complications were reported in 11 patients during the entire follow-up period. At the three-year examination, the mean marginal bone loss was 1.52 ± 0.41 mm.

Conclusion: Within the limitations of the present study, the All-on-4 protocol was deemed a viable treatment concept for the complete-arch rehabilitation of both jaws in the medium term. Further long-term prospective studies are needed to confirm these results.

Editorial note: The full article was published in the 2/2016 issue of the Journal of Oral Science and Rehabilitation. Access the full article at www.dtscience.com.

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