Stable soft tissue and marginal bone maintenance

DENTSPLY Implants sound scienceAchieving beautiful, natural-looking esthetics for your implant patients requires biological sustainability—the harmony of marginal bone and surrounding soft tissue over time.

This harmony exists when all the elements of an implant system—implant design, surface treatment, abutment connection—work in unison with biology.

But biological sustainability is a journey, not only a destination. By searching further and continuing to challenge with sound science, we can provide evidence demonstrating biological sustainability, leading to optimal dental implant treatment outcomes.

Summaries of prospective studies with 5-year data on OsseoSpeed implants with maintained bone levels from implant placement and implant loading confirm stable soft tissue and an average bone reduction of only 0.3 mm.

We search further because we are committed to sound science, providing biological sustainability for a world where everyone can eat, speak and smile with confidence—because it matters.

Long-term marginal bone stability

DENTSPLY Implants overall survival rate 98percent

In 1986, a review article was published describing the marginal bone remodeling pattern in dental implant treatment. Data demonstrated that the greatest reduction in marginal bone occurs during the early healing phase and up to the first year in function. Thereafter, marginal bone remodeling stabilizes at approximately -1.5 mm after 5 years—the results became the accepted standard norm for evaluating marginal bone remodeling.* To improve our understanding, we have vigilantly performed systematic literature searches and reviews, following the performance of the ASTRA TECH Implant System with regard to bone maintenance and remodeling.

Numerous studies demonstrate that marginal bone around OsseoSpeed implants is maintained well above the standard norm—even after 5 years in function.**


Marginal bone maintenance with ASTRA TECH Implant System™DENTSPLY Implants Average bone level reduction

ASTRA TECH Implants system bone level graph

Search criteria

  • Prospective studies, published in peer-reviewed journals
  • Full cohort studies (minimum of 10 patients, followed for a minimum of 1 year after loading)
  • Standard protocol (no bone augmentation, no immediate placement in extraction socket)
  • Marginal bone maintenance evaluated from time of implant placement and/or loading

Important findings

  • Data from 17 articles showed an average bone level reduction from implant placement to 5 years of 0.3 mm
  • Data from 62 articles showed an average bone level reduction of 0.3 mm, 1 year after implant loading, remaining stable for 5 years
  • Overall implant survival rate was >98%

Studies were conducted in both educational institutions and private practices, including specialists and general practitioners.


* Standard norm (less than 1 mm bone loss during the first year of loading and less than 0.2 mm annually thereafter, to level out at approximately -1.5 mm after 5 years of loading) according to: Albrektsson T. et al., Int J Oral Maxillofac Implants 1986;1(1):11-25, Albrektsson T. and Zarb GA., Int J Prosthodont 1993;6(2):95-105, Roos J. et al., Int J Oral Maxillofac Implants 1997;12(4):504-514.

** ASTRA TECH Implant System level based on data from 62 articles (published in English, peer-reviewed journals) presenting radiological data on study cohorts of no less than 10 patients receiving standard surgical procedures and followed for minimum 1 year after loading. Literature search September2014.

A successful implant system must be determined by several interdependent features working together.


View the scientific review on Marginal bone maintenance and ASTRA TECH Implant System™.