Summary
The aim of this systematic review was to assess whether different implant neck designs (polished or coated, with or without platform switching, either with or without microthreads) influence marginal bone resorption. A systematic review was conducted following the PICO methodology of the Centre for Evidence-Based Medicine of Oxford University. The question to the achievement of objectives was: Is the design of the implant neck a critical factor in the preservation of marginal bone levels? Specific MeSH keywords were used in the Pubmed and Cochrane databases. Three independent reviewers agreed on the studies ultimately included finding a concordance kappa index of 0.86. Of these articles, acritical evaluation of the level of evidence was performed and also the risk of bias of the RCT using the Cochrane tool. Four hundred forty-five items were reviewed by title, eventually including a total of 16 full-text articles. Heterogeneity of these studies made impossible the performance of a meta-analysis. No evidence that a particular configuration of the implant neck was better than another in preserving the peri-implant marginal bone was found, and yet it seems that an apico-coronal position juxtaosseous of the smooth neck of the implant relative to the bone crest could be decisive. Not enough evidence was found on the effectiveness of different configurations of the cervical region of the implant in the periimplant marginal bone preservation. More randomized controlled trials are needed to assess long-term effects of such modifications.
KEY WORDS: bone resorption, implant collar, implant neck, marginal bone loss, neck design, platformswitching.
How to cite this article
DIÉGUEZ PEREIRA, M.; SANTAMARÍA ARRIETA G.; FERNÁNDEZ GONZÁLEZ, F. J.; VEGA ÁLVAREZ, J. A.; BELLANCO PINTA, I.; MARTÍN BLANCO N. & BRIZUELA VELASCO. A. Influence of the micro and macroscopic implant neck design in the preservation of marginal bone level: A systematic review. Int. J. Odontostomat., 9(1):119-127, 2015.
