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Journal of Oral Science & Rehabilitation 16 Volume 2 | Issue 2/2016 T h r e e - y e a r r e s u l t s o f A l l - o n - 4 i n d a i l y p r a c t i c e 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 Abstract O b j e c t i v e All-on-4 treatment concept is widely applied for complete-arch rehabili- tations. Nevertheless, minor technical and biological complications can occur. The objective of this study was to evaluate the three-year clinical and radiographic data ofcomplete-archfixed dental prostheses support- ed by four implants according to the All-on-4 protocol. M a t e r i a l s a n d m e t h o d s Thirtyconsecutiveedentulouspatientsorpatientswithterminaldentition (18 females and 12 males; mean age of 67.4 years), with a preference for implant-supportedcomplete-archscrew-retainedfixeddentalprostheses, were enrolled and treated according to the All-on-4 protocol between January2008andDecember2011.Theoutcomesevaluatedwereimplant and prosthesis survival and success rates, any technical and biological complications, periimplant marginal bone loss and patient satisfaction. R e s u l t s One hundred and twenty regular platform implants were placed. No pa- tients dropped out. One implant failed two months after placement, re- sultinginacumulativeimplantsurvivalrateof99.2%.Nodefinitivepros- theses failed. Eight technical and three biological complications were reportedin11patientsduringtheentirefollow-upperiod.Atthethree-year examination, the mean marginal bone loss was 1.52±0.41 mm. C o n c l u s i o n Within the limitations of the present study, the All-on-4 protocol was deemedaviabletreatmentconceptforthecomplete-archrehabilitationof both jaws in the medium term. Further long-term prospective studies are needed to confirm these results. Marco Tallarico,a Silvio Mario Meloni,b Erta Xhanaric & Luigi Canullod a Private practice, Rome, Italy & University of Sassari, Sassari, Italy b University of Sassari, Sassari, Italy c Independent researcher, Tirana, Albania d Independent researcher, Rome, Italy C o r r e s p o n d i n g a u t h o r : Dr. Marco Tallarico Via di Val Tellina 116 00151 Rome Italy M +39 3280758769 me@studiomarcotallarico.it H o w t o c i t e t h i s a r t i c l e : Tallarico M, Meloni MS, Xhanari E, Canullo L. 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. J Oral Science Rehabilitation. 2016 Jun;2(2):16–25. M +393280758769