Dental News - 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

Drs. Marco Tallarico & Silvio Meloni

Mon. 10. April 2017

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Objective: 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.

Materials and methods
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 implants and prostheses, complications, marginal bone level changes, insertion torque, implant stability quotient, bone density and soft-tissue biotype.

Results
A total of 243 implants were placed in 90 consecutive patients and followed 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 cumulative mean marginal bone loss between implant placement 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).

Conclusion
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.

Editorial note: The full article was published in the 1/2017 issue of the Journal of Oral Science and Rehabilitation. It can be accessed free of charge at www.dtscience.com.

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