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P h y s i o l o g i c a l b o n e r e m o d e l i n g o n O s s t e m i m p l a n t s Open-cohort prospective study on early implant failure and physiological marginal remodeling expected using sandblasted and acid-etched bone level implants featuring an 11° Morse taper connection within one year after loading Abstract O b j e c t i v e Marco Tallaricoa & Silvio Mario Melonib a Aldent University, Tirana, Albania; private practice, Rome, Italy b University of Sassari, Sassari, Italy; private practice, Arzachena, 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 T +39 06 663 0646 me@studiomarcotallarico.it The objective of this study was to evaluate the implant survival and success rates as well as the physiological marginal bone remodeling expected using Osstem implants. M a t e r i a l s a n d m e t h o d s This investigation was designed as an open-cohort prospective study on completely or partially edentulous patients who received at least one bone level implant with a sandblasted and acid-etched surface and an 11° Morse taper connection. Outcome measures were the success rates of the im- plants and prostheses, complications, marginal bone level changes, inser- tion torque, implant stability quotient, bone density and soft-tissue biotype. H o w t o c i t e t h i s a r t i c l e : R e s u l t s Tallarico M, Meloni SM. Open-cohort prospective study on early implant failure and physiological marginal remodeling expected using sandblasted and acid-etched bone level implants featuring an 11° Morse taper connection within one year after loading. J Oral Science Rehabilitation. 2017 Mar;3(1):68–79. A total of 243 implants were placed in 90 consecutive patients and fol- lowed up for a minimum period of one year after loading (mean of 17.6 ± 2.5 months; range of 12–24 months). Five implants failed in five patients, resulting in a cumulative implant survival rate of 97.9%. Insertion torque of < 35 N cm was found to be a risk factor for implant failure (p = 0.0068). No definitive prosthesis failed, resulting in a cumulative prosthetic survival rate of 100%. Four patients experienced one technical complication each, resulting in a cumulative prosthetic success rate of 97.2%. The cumu lative mean marginal bone loss between implant place- ment and the follow- up one year after loading was 0.37 ± 0.25 mm (95% CI: 0.26–0.30). Comparison of marginal bone loss and the investigated risk factors found statistically higher marginal bone loss for smokers, a thin gingival biotype and guided bone regeneration (p < 0.05). C o n c l u s i o n Low implant failure and physiological marginal bone remodeling of 0.37 mm within one year after loading can be expected using Osstem TSIII implants in the daily practice. K e y w o r d s Dental implants, bone remodeling, conical connection, survival rate, complications. 68 Volume 3 | Issue 1/2017 Journal of Oral Science & Rehabilitation