Marginal bone loss in relation to the implant neck surface: an update

Med Oral Patol Oral Cir Bucal. 2011 May 1;16(3):e365-8. doi: 10.4317/medoral.16.e365.


A review is made of the publications on the marginal bone loss of implants with a polished neck, rough neck with microthreading, and rough neck without microthreading. A PubMed search was carried out with the following key words: machined neck implant, polished neck implant, marginal bone loss, covering the period between January 1998 and March 2009. Inclusion was limited to those human clinical studies involving a minimum follow-up of 12 months, and registering the level of bone loss from the time of placement of the implant or prosthetic restoration to the end of follow-up. For most of the authors there were no significant differences in marginal bone loss between polished neck and rough neck implants. On the other hand, implants with a rough neck and microthreading showed significantly less bone loss than those with a polished neck or with a rough neck without microthreading. The survival rate of the implants with a polished neck ranged from 87% to 97.7%, versus 94.5% to 100% for those with a rough neck, and 100% for the rough neck implants with microthreading. No peri-implant disease was registered in the different studies.

Publication types

  • Review

MeSH terms

  • Alveolar Bone Loss / epidemiology*
  • Dental Implants / adverse effects*
  • Humans
  • Surface Properties


  • Dental Implants