Cargando…

Drilling Capability of Orthodontic Miniscrews: In Vitro Study

The aims of this study were to assess the values and mechanical properties of insertion torque (IT) of steel miniscrews inserted in artificial bone blocks (Sawbones, Pacific Research Laboratories, Vashon, WA, USA) with different bone densities and to detect any scratches on the surface of the minisc...

Descripción completa

Detalles Bibliográficos
Autores principales: Marchi, Alessandra, Camporesi, Matteo, Festa, Maurizio, Salvatierra, Luis, Izadi, Sara, Farronato, Giampietro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7766744/
https://www.ncbi.nlm.nih.gov/pubmed/33371233
http://dx.doi.org/10.3390/dj8040138
_version_ 1783628792127815680
author Marchi, Alessandra
Camporesi, Matteo
Festa, Maurizio
Salvatierra, Luis
Izadi, Sara
Farronato, Giampietro
author_facet Marchi, Alessandra
Camporesi, Matteo
Festa, Maurizio
Salvatierra, Luis
Izadi, Sara
Farronato, Giampietro
author_sort Marchi, Alessandra
collection PubMed
description The aims of this study were to assess the values and mechanical properties of insertion torque (IT) of steel miniscrews inserted in artificial bone blocks (Sawbones, Pacific Research Laboratories, Vashon, WA, USA) with different bone densities and to detect any scratches on the surface of the miniscrews after insertion. Forty self-drilling miniscrews (Leone S.p.A. ø 1.75 mm, L 8 mm) have been inserted into bone blocks that mimic different stability conditions (density: 20 PCF—pounds per cubic foot, 40 PCF, and 30 + 50 PCF with 2 mm and 4 mm of cortical bone). Before insertion and after removal, all miniscrews were inspected with a stereomicroscope 5x and a SEM to detect potential microscopic cracks. Using an electronic surgical motor (W&H Dentalwerk Bürmoos GmbH, Werner Bader Str. 1, 5111 Bürmoos, Austria), the maximum insertion torque value was registered. Stereomicroscope and SEM examination did not indicate any morphological and surface structural changes to the miniscrews, irrespective of the bone density they were inserted into. The findings showed that IT increased significantly with increasing bone density. In each artificial bone block, morphostructural analysis demonstrated the adequate mechanical properties of the self-drilling miniscrews. IT measurements indicated torque values between 6 and 10 Ncm for blocks with a density of 30 + 50 PCF, whereas the suggested values are between 5 and 10 Ncm.
format Online
Article
Text
id pubmed-7766744
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-77667442020-12-28 Drilling Capability of Orthodontic Miniscrews: In Vitro Study Marchi, Alessandra Camporesi, Matteo Festa, Maurizio Salvatierra, Luis Izadi, Sara Farronato, Giampietro Dent J (Basel) Article The aims of this study were to assess the values and mechanical properties of insertion torque (IT) of steel miniscrews inserted in artificial bone blocks (Sawbones, Pacific Research Laboratories, Vashon, WA, USA) with different bone densities and to detect any scratches on the surface of the miniscrews after insertion. Forty self-drilling miniscrews (Leone S.p.A. ø 1.75 mm, L 8 mm) have been inserted into bone blocks that mimic different stability conditions (density: 20 PCF—pounds per cubic foot, 40 PCF, and 30 + 50 PCF with 2 mm and 4 mm of cortical bone). Before insertion and after removal, all miniscrews were inspected with a stereomicroscope 5x and a SEM to detect potential microscopic cracks. Using an electronic surgical motor (W&H Dentalwerk Bürmoos GmbH, Werner Bader Str. 1, 5111 Bürmoos, Austria), the maximum insertion torque value was registered. Stereomicroscope and SEM examination did not indicate any morphological and surface structural changes to the miniscrews, irrespective of the bone density they were inserted into. The findings showed that IT increased significantly with increasing bone density. In each artificial bone block, morphostructural analysis demonstrated the adequate mechanical properties of the self-drilling miniscrews. IT measurements indicated torque values between 6 and 10 Ncm for blocks with a density of 30 + 50 PCF, whereas the suggested values are between 5 and 10 Ncm. MDPI 2020-12-21 /pmc/articles/PMC7766744/ /pubmed/33371233 http://dx.doi.org/10.3390/dj8040138 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Marchi, Alessandra
Camporesi, Matteo
Festa, Maurizio
Salvatierra, Luis
Izadi, Sara
Farronato, Giampietro
Drilling Capability of Orthodontic Miniscrews: In Vitro Study
title Drilling Capability of Orthodontic Miniscrews: In Vitro Study
title_full Drilling Capability of Orthodontic Miniscrews: In Vitro Study
title_fullStr Drilling Capability of Orthodontic Miniscrews: In Vitro Study
title_full_unstemmed Drilling Capability of Orthodontic Miniscrews: In Vitro Study
title_short Drilling Capability of Orthodontic Miniscrews: In Vitro Study
title_sort drilling capability of orthodontic miniscrews: in vitro study
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7766744/
https://www.ncbi.nlm.nih.gov/pubmed/33371233
http://dx.doi.org/10.3390/dj8040138
work_keys_str_mv AT marchialessandra drillingcapabilityoforthodonticminiscrewsinvitrostudy
AT camporesimatteo drillingcapabilityoforthodonticminiscrewsinvitrostudy
AT festamaurizio drillingcapabilityoforthodonticminiscrewsinvitrostudy
AT salvatierraluis drillingcapabilityoforthodonticminiscrewsinvitrostudy
AT izadisara drillingcapabilityoforthodonticminiscrewsinvitrostudy
AT farronatogiampietro drillingcapabilityoforthodonticminiscrewsinvitrostudy