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Updated: Jun 21, 2026

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage

Published on: February 10, 2014

Marginal bone level changes at dental implants after 5 years in function: a meta-analysis.

Lars Laurell¹, Dan Lundgren

¹Institute of Odontology, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden.

Clinical Implant Dentistry and Related Research

|August 18, 2009

Summary

This study compared peri-implant marginal bone loss for three leading dental implant systems over five years. All systems demonstrated bone loss below established success limits, indicating good long-term stability.

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Area of Science:

Dental Implantology
Periodontology
Biomaterials Science

Background:

Minimizing peri-implant bone loss is crucial for dental implant success.
Understanding the extent of acceptable marginal bone loss remains a key question.

Purpose of the Study:

To compare peri-implant marginal bone level changes in currently available implant systems.
To analyze data from prospective studies with 5-year follow-up after prosthetic loading.

Main Methods:

A systematic literature search identified relevant prospective studies.
Meta-analysis included implant systems with at least two independent supporting studies.
Excluded were undocumented copycat systems.

Main Results:

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An Improved Mechanical Testing Method to Assess Bone-implant Anchorage

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage

Published on: February 10, 2014

Three implant systems met inclusion criteria: Astra Tech, Brånemark, and Straumann.
Pooled mean 5-year marginal bone loss: Astra Tech (-0.24 mm), Brånemark (-0.75 mm), Straumann (-0.48 mm).
Statistically significant differences in bone loss were observed between the systems (p < .01).

Conclusions:

All evaluated implant systems exhibited annual bone loss below established success thresholds.
Mandatory documentation of marginal bone level changes for all implant systems is recommended.
Existing success criteria for implant treatment may require revision.