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Updated: Jan 24, 2026

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An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
Published on: February 10, 2014
15.9K
Relationship Between Primary/Mechanical and Secondary/Biological Implant Stability
Summary
Primary implant stability, measured by insertion torque (IT), positively impacts bone loss, but high initial stability may harm bone levels. Current metrics for implant stability lack a conclusive link to implant survival rates.
Area of Science:
- Dental Implantology
- Biomaterials Science
- Osseointegration Research
Background:
- Assessing dental implant stability is crucial for successful osseointegration.
- Primary (mechanical) and secondary (biological) stability are key factors in implant success.
- Understanding the relationship between these stability types informs clinical practice.
Purpose of the Study:
- To systematically review the relationship between primary and secondary implant stability.
- To evaluate how primary stability metrics correlate with implant survival and marginal bone loss.
- To assess the accuracy of devices used for measuring implant stability.
Main Methods:
- Systematic review and meta-regression analysis of 37 studies.
- Examined primary stability measures: Insertion Torque (IT) and Implant Stability Quotient (ISQ).
- Assessed secondary stability outcomes: implant survival and marginal bone loss (MBL).
Main Results:
- A strong positive relationship exists between primary and secondary implant stability (P < .001).
- Insertion Torque (IT) showed a significant positive relationship with marginal bone loss (MBL) (P = .02).
- No statistically significant relationship was found between ISQ or IT and implant survival.
Conclusions:
- Higher primary stability may promote secondary stability but could negatively impact bone levels.
- Current methods for tracking implant stability are clinically useful but lack conclusive links to implant survival.
- Further research is needed to establish robust connections between stability metrics and long-term implant success.
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