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An In Vitro Analysis on Polyurethane Foam Blocks of the Insertion Torque (IT) Values, Removal Torque Values (RTVs), and Resonance Frequency Analysis (RFA) Values in Tapered and Cylindrical Implants

Author

Listed:
  • Luca Comuzzi

    (Independent Researcher, Via Raffaello 36/a, 31020 San Vendemiano, TV, Italy
    Authors contributed equally.)

  • Margherita Tumedei

    (Department of Medical, Oral and Biotechnological Sciences, University “G. D’Annunzio” of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
    Authors contributed equally.)

  • Camillo D’Arcangelo

    (Department of Medical, Oral and Biotechnological Sciences, University “G. D’Annunzio” of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy)

  • Adriano Piattelli

    (Department of Medical, Oral and Biotechnological Sciences, University “G. D’Annunzio” of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
    Biomaterials Engineering, Catholic University of San Antonio de Murcia (UCAM), Av. de los Jerónimos, 135, 30107 Guadalupe, Murcia, Spain
    Fondazione Villaserena per la Ricerca, Via Leonardo Petruzzi 42, 65013 Città Sant’Angelo, PE, Italy
    Casa di Cura Villa Serena del Dott. L. Petruzzi, Via Leonardo Petruzzi 42, 65013 Città Sant’Angelo, PE, Italy)

  • Giovanna Iezzi

    (Department of Medical, Oral and Biotechnological Sciences, University “G. D’Annunzio” of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy)

Abstract

Background: Several different dental implant microgeometries have been investigated in the literature for use in low-density bone sites. The polyurethane solid rigid blocks represent an optimal in vitro study model for dental implants, because their composition is characterized by symmetrical linear chains of monomers of hexa-methylene sequences producing a self-polymerization process. The aim of the present investigation was to evaluate the primary stability of cylindrical and tapered implants positioned into low-density polyurethane solid rigid blocks. Materials and Methods: Two different macrogeometries, cylindrical (4 mm diameter and 10 mm length) and tapered dental implants (4.20 mm diameter and 10 mm length), were investigated in the present study. The implants were inserted into 10 PCF and 20 PCF polyurethane blocks, with and without an additional cortical layer. The insertion torque (IT) values, the removal torque values (RTVs), and the resonance frequency analysis (RFA) values were measured and recorded. Results: A total of 80 sites were tested, and a significant increased primary stability (PS) was detected in favour of tapered dental implants when compared to cylindrical implants in all experimental conditions ( p < 0.05). Higher IT, RT, and RFA values were measured in tapered implants in 10 and 20 PCF polyurethane blocks, both with and without the additional cortical layer. Conclusions: Both implants showed sufficient primary stability in poor density substrates, while, on the other hand, the tapered microgeometry showed characteristics that could also lead to clinical application in low-density posterior maxillary sites, even with a drastically decreased bone cortical component.

Suggested Citation

  • Luca Comuzzi & Margherita Tumedei & Camillo D’Arcangelo & Adriano Piattelli & Giovanna Iezzi, 2021. "An In Vitro Analysis on Polyurethane Foam Blocks of the Insertion Torque (IT) Values, Removal Torque Values (RTVs), and Resonance Frequency Analysis (RFA) Values in Tapered and Cylindrical Implants," IJERPH, MDPI, vol. 18(17), pages 1-10, September.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:17:p:9238-:d:627293
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    References listed on IDEAS

    as
    1. Mariano Herrero-Climent & Bernardo Ferreira Lemos & Federico Herrero-Climent & Carlos Falcao & Helder Oliveira & Manuela Herrera & Francisco Javier Gil & Blanca Ríos-Carrasco & José-Vicente Ríos-Santo, 2020. "Influence of Implant Design and Under-Preparation of the Implant Site on Implant Primary Stability. An In Vitro Study," IJERPH, MDPI, vol. 17(12), pages 1-13, June.
    2. Sergio Alexandre Gehrke & Margherita Tumedei & Jaime Aramburú Júnior & Tiago Luis Eirles Treichel & Roni Kolerman & Stefania Lepore & Adriano Piattelli & Giovanna Iezzi, 2020. "Histological and Histomorphometrical Evaluation of a New Implant Macrogeometry. A Sheep Study," IJERPH, MDPI, vol. 17(10), pages 1-13, May.
    3. Luca Comuzzi & Margherita Tumedei & Ana Emilia Pontes & Adriano Piattelli & Giovanna Iezzi, 2020. "Primary Stability of Dental Implants in Low-Density (10 and 20 pcf) Polyurethane Foam Blocks: Conical vs Cylindrical Implants," IJERPH, MDPI, vol. 17(8), pages 1-11, April.
    4. Stefano Fanali & Margherita Tumedei & Pamela Pignatelli & Francesco Inchingolo & Paolo Pennacchietti & Gianluca Pace & Adriano Piattelli, 2021. "Implant primary stability with an osteocondensation drilling protocol in different density polyurethane blocks," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 24(1), pages 14-20, May.
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