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Primary Stability of Trabecular Metal Implant in Comparison to Fully Threaded Implants: In Vitro Study Simulating
Marko Magic1, Gorana Zupanek2, Zoran Lazic3
1School of Dental Medicine, University of Belgrade, Belgrade, Serbia.
The Journal of Oral Implantology
|July 26, 2022
Summary
Porous tantalum Trabecular Metal (TM) implants demonstrate comparable primary stability to other designs in immediate anterior maxilla placement. While insertion torque was lower, TM implants showed good stability, correlating with insertion torque and resonance frequency analysis.
Area of Science:
- Dental Implantology
- Biomaterials Science
- Biomechanical Engineering
Background:
- Immediate implant placement in the anterior maxilla requires high primary stability for successful osseointegration.
- Porous tantalum Trabecular Metal (TM) implants offer unique surface properties that may enhance primary stability.
- Comparing TM implants to traditional fully threaded designs is crucial for understanding their clinical potential.
Purpose of the Study:
- To evaluate the primary stability of 3.7-mm diameter porous tantalum Trabecular Metal (TM) implants.
- To compare the primary stability of TM implants against fully threaded Tapered Screw-Vent (TSV) and NobelReplace implants.
- To assess implant stability using in vitro models simulating immediate anterior maxilla placement.
Main Methods:
- Sixty implants (20 TM, 20 TSV, 20 NobelReplace) were placed in bovine ribs using surgical guides at a simulated sharp angle (20.7°).
- Primary stability was measured using implant stability quotient (ISQ) via resonance frequency analysis.
- Insertion torque and insertion time were recorded for each implant group.
Main Results:
- No statistically significant difference in ISQ values was observed between TM (65.8 ± 2.6), TSV (64.7 ± 2.7), and NobelReplace (64.6 ± 2.7) implants.
- TSV implants exhibited higher insertion torque (37.0 ± 4.8 Ncm) and shorter insertion time (13.5 ± 1.0 s) compared to TM and NobelReplace.
- A significant positive correlation between insertion torque and ISQ was found for the TM group (P = .011, r = .56).
Conclusions:
- Porous tantalum Trabecular Metal (TM) implants achieve good primary stability in immediate anterior maxilla placement models.
- TM implants demonstrate comparable resonance frequency analysis stability to conventional threaded implants.
- Insertion torque and ISQ values are significantly correlated for TM implants, suggesting a predictable primary stability measure.
Keywords:
implant designinsertion torqueprimary implant stabilityresonance frequency analysistrabecular metal implant
