This 2010 review by Cehreli et al of marginal bone loss around implants has now been critically reviewed by the American Dental Association Center for Evidence-Based Dentistry.
The review found that
Marginal bone loss around implants supporting or retaining mandibular overdentures is not significantly affected by the implant system or attachment design
However the reviewer noted a number of methodological concerns related to the review and the bulk of the included studies were retrospective. These need to be considered when reading the original review
Cehreli MC, Karasoy D, Kökat AM, Akça K, Eckert S. A systematic review of marginal bone loss around implants retaining or supporting overdentures. Int J Oral Maxillofac Implants. 2010 Mar-Apr;25(2):266-77. Review. [PubMed Abstract].
