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Correlation between Insertion Torque and Implant Stability Quotient in Tapered Implants with Knife-Edge Thread Design
Domenico Baldi1, Teresa Lombardi2, Jacopo Colombo3
1Department of Surgical Sciences, University of Genoa, Italy.
Biomed Research International
|June 5, 2018
Summary
Insertion torque (IT) and implant stability quotient (ISQ) show a positive correlation up to 50 N/cm for tapered implants. Higher torques increase stress without improving implant stability.
Area of Science:
- Dental Implantology
- Biomaterials Science
- Surgical Engineering
Background:
- Implant stability is crucial for successful osseointegration.
- Insertion torque (IT) and implant stability quotient (ISQ) are common metrics for assessing initial implant stability.
- Understanding the relationship between IT and ISQ is vital for optimizing surgical procedures.
Purpose of the Study:
- To evaluate the correlation between insertion torque (IT) and implant stability quotient (ISQ) in tapered implants with knife-edge threads.
- To determine if excessive insertion torque provides additional benefits for implant stability.
Main Methods:
- Seventy-five tapered implants were inserted using controlled torque and resonance frequency analysis.
- Insertion torque (IT) and implant stability quotient (ISQ) were recorded.
- Implants were grouped by IT (low, medium, high) and analyzed using Kruskal-Wallis and Mann-Whitney U tests, with Spearman Rho for correlation.
Main Results:
- A significant difference in ISQ was found between low and high torque groups.
- A significant positive correlation between IT and ISQ was observed for the entire sample and the medium torque group.
- No significant correlation was found in the low and high torque groups.
Conclusions:
- Implant stability quotient (ISQ) and insertion torque (IT) positively correlate up to approximately 50 N/cm for the studied tapered implants.
- Applying torques exceeding 50 N/cm does not enhance implant stability and may induce unnecessary biological and mechanical stress on the bone-implant system.
- Optimizing IT within a specific range is crucial to maximize implant stability while minimizing potential harm.
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