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Pri mary stability of Trabecular Metal implant in comparison to fully threaded implants: in vitro study simulating immediate implant placement

J Oral Implantol. 2022 Jul 26. doi: 10.1563/aaid-joi-D-21-00034. Online ahead of print.


The aim of this study was to evaluate primary stability of 3.7 mm diameter porous tantalum Trabecular MetalTM (TMTM) implant, and compare it to fully threaded implants, in the in vitro model of immediate implant placement in the anterior maxilla. A total of sixty implants were placed into bovine ribs using surgical guides. Implants were divided in three groups of twenty according to the design: TMTM, Tapered Screw-Vent® (TSV®) and NobelReplace®. To simulate immediate placement in anterior maxilla, implants were placed under a sharp angle towards the ribs, not fully submerged. Placement angle of 20.7 degrees was calculated after analysis of 148 virtually planned implants on CBCT scans of 40 patients. No statistically significant difference in implant stability quotient (ISQ) was found between TMTM (65.8 ± 2.6,), TSV® (64.7 ± 2.7) and NobelReplace® (64.6 ± 2.7). TSV® implants achieved higher insertion torque (37.0 ± 4.8 Ncm) than TMTM (32.9 ± 5.2 Ncm) and NobelReplace® (23.2 ± 3.3 Ncm). TSV® had shortest insertion time of 13.5 ± 1.0 seconds, compared to 15.2 ± 1.2 seconds for TMTM, and 19.7 ± 1.7 seconds for NobelReplace®. Pearson correlation analysis showed significantly correlated insertion torque and ISQ values for TMTM group (P=0.011, r=0.56), a non-significant correlation was found for TSV® and NobelReplace®. The results of the present study indicate that TMTM implant can achieve good primary implant stability in terms of insertion torque and resonance frequency analysis.

PMID:35881824 | DOI:10.1563/aaid-joi-D-21-00034

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