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T a p e r e d i m p l a n t s f o r b u n d l e b o n e p r e s e r v a t i o n Conclusion Our findings suggest that less resorption can be expected when implants are inserted 2 mm sub- crestally for both immediate and deferred implants compared with placement at the crestal level. In addition, higher BIC values were found at 12 weeks of follow-up in the group of implants placed subcrestally in healed bone compared with those placed subcrestally immediately. The design of an implant with a smooth neck without microthreads and with a surface highly receptive to osteoblasts improves osseo integration in the initial stages, which a posteriori increases. Competing interests The authors declare that they have no compet- ing interests. References 1. Abrahamsson I, Alboury JP, Berglundh T. Healing at fluoride-modified implants placed in wide marginal defects: an experimental study in dogs. → Clin Oral Implants Res. 2008 Feb;19(2):153–9. Epub 2007 Nov 26. 9. 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