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Article

Mechanical Evaluation of the Stability of One or Two Miniscrews under Loading on Synthetic Bone

1
Department of Medical, Surgical and Health Sciences, University of Trieste, 34127 Trieste, Italy
2
Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, 81100 Naples, Italy
*
Author to whom correspondence should be addressed.
J. Funct. Biomater. 2020, 11(4), 80; https://0-doi-org.brum.beds.ac.uk/10.3390/jfb11040080
Received: 29 September 2020 / Revised: 1 November 2020 / Accepted: 2 November 2020 / Published: 5 November 2020
(This article belongs to the Special Issue Advanced Functional Biomaterials for Dental Implants)
The aim of the present study was to evaluate the primary stability of a two-miniscrew system inserted into a synthetic bone and to compare the system with the traditional one. Forty-five bi-layered polyurethane blocks were used to simulate maxillary cancellous and cortical bone densities. Samples were randomly assigned to three groups—one-miniscrew system (Group A, N = 23), two-miniscrew system (Group B, N = 22) and archwire-only (Group C, N = 10). A total of 67 new miniscrews were subdivided into Group A (23 singles) and Group B (22 couples). 30 mm of 19″ × 25″ archwires were tied to the miniscrew. The load was applied perpendicularly to the archwire. Maximum Load Value (MLV), Yield Load (YL) and Loosening Load (LL) were recorded for each group. The YL of Group B and C had a mean value respectively of 4.189 ± 0.390 N and 3.652 ± 0.064 N. The MLV of Group A, B and C had a mean value respectively of 1.871 ± 0.318N, of 4.843 ± 0.515 N and 4.150 ± 0.086 N. The LL of Group A and B had a mean value respectively of 1.871 ± 0.318 N and of 2.294 ± 0.333 N. A two- temporary anchorage device (TAD) system is on average stiffer than a one-TAD system under orthodontic loading. View Full-Text
Keywords: miniscrews; bone anchorage; primary stability; load value; TADs miniscrews; bone anchorage; primary stability; load value; TADs
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MDPI and ACS Style

Pradal, A.; Nucci, L.; Derton, N.; De Felice, M.E.; Turco, G.; Grassia, V.; Contardo, L. Mechanical Evaluation of the Stability of One or Two Miniscrews under Loading on Synthetic Bone. J. Funct. Biomater. 2020, 11, 80. https://0-doi-org.brum.beds.ac.uk/10.3390/jfb11040080

AMA Style

Pradal A, Nucci L, Derton N, De Felice ME, Turco G, Grassia V, Contardo L. Mechanical Evaluation of the Stability of One or Two Miniscrews under Loading on Synthetic Bone. Journal of Functional Biomaterials. 2020; 11(4):80. https://0-doi-org.brum.beds.ac.uk/10.3390/jfb11040080

Chicago/Turabian Style

Pradal, Andrea, Ludovica Nucci, Nicola Derton, Maria E. De Felice, Gianluca Turco, Vincenzo Grassia, and Luca Contardo. 2020. "Mechanical Evaluation of the Stability of One or Two Miniscrews under Loading on Synthetic Bone" Journal of Functional Biomaterials 11, no. 4: 80. https://0-doi-org.brum.beds.ac.uk/10.3390/jfb11040080

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