Evaluation of primary stability of innovated orthodontic miniscrew system (STS): An ex-vivo study

Seifi, Massoud; Matini, Negin-Sadat

doi:10.4317/jced.52676

Cited by 8 publications

(5 citation statements)

References 26 publications

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“…Osseointegration is not needed as for orthodontic miniscrews as it is for conventional dental implants, because mechanical retention is the determining factor for their primary stability [ 23 ]. However, the major clinical unwanted adverse event with TADs is the fracture of the miniscrew, which implies surgical removal of the broken part [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Reliability of Orthodontic Miniscrews: Bending and Maximum Load of Different Ti-6Al-4V Titanium and Stainless Steel Temporary Anchorage Devices (TADs)

et al. 2018

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Temporary anchorage devices (TADs) have been introduced into orthodontic clinical practice in order to allow tooth movements while avoiding strain on adjacent teeth. Miniscrews are available in the market with different diameters and materials. Accordingly, the purpose of the present report was to measure and compare the forces to bend and fracture different mini implants. Ti-6Al-4V titanium and stainless steel TADs of different manufacturers (Spider ScrewHDC; Mini Implants–Leone; Benefit–Orteam; Storm–Kristal) were evaluated. Two different diameters (1.5 mm and 2.0 mm) were tested. The sample included 10 unused specimens for each group, blocked in an Instron Universal Testing Machine, and a shear load was applied at the neck of the miniscrew. The force to bend the miniscrew was measured at 0.1 mm and 0.2 mm deflections. Also, the maximum force before screw fracture was recorded. Data were submitted for statistical analysis. Results showed significantly higher forces for 2.0 mm than 1.5 mm screws, both at 0.1 mm and 0.2 mm deflections and at maximum load. Moreover, no significant differences were reported between titanium and stainless steel miniscrews of equal diameters.

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Section: Introductionmentioning

confidence: 99%

Reliability of Orthodontic Miniscrews: Bending and Maximum Load of Different Ti-6Al-4V Titanium and Stainless Steel Temporary Anchorage Devices (TADs)

et al. 2018

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“…Considering that primary stability is one of the key factors for the clinical success of MIs [8,[10][11][12][13], its evaluation can be performed using methods such as periotest, pull-out and insertion/removal torque. It is defined as mechanical bone stability immediately after MI insertion [14][15][16][17] and it should be noted that cortical bone is an important factor in MI stability [11,14,15,17,18].…”

Section: Discussionmentioning

confidence: 99%

“…The percussion test (Periotest ® ) is a reliable indicator for measuring implant stability at both conventional and immediate loads [12]. However, according to Hosein et al [13], it should be used in combination with other mechanical tests.…”

Section: Discussionmentioning

confidence: 99%

Mechanical Properties of Mini-Implants Used in Extra-Radicular Anchorage

Lopes,

Pithon,

Mordente

et al. 2023

Pesqui. Bras. Odontopediatria Clín. Integr.

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Objective: To evaluate the mechanical properties of mini-implants (MIs) manufactured from stainless steel and compare them with conventional titanium-aluminum-vanadium alloy MIs. Material and Methods: The following groups were formed: G1 (n=24), 8×1.5 mm steel MIs; G2 (n=24), 12×2.0 mm steel MIs; and G3 (n=24), 10×1.5 mm titanium MIs. The 72 MIs were inserted in the infra zygomatic crest region of the maxilla and retromolar trigone in the jaw of 10 pigs. Pull-out, insertion torque, fracture and percussion tests were performed in order to measure the tensile strength, primary stability and fracture strength of MIs. A digital torque gauge was used to measure insertion and fracture torque, a universal mechanical testing machine was used for pull-out testing and a periotest device was used to measure the micromovement of MIs. For morphological and MI component evaluation, scanning electron microscopy (SEM) was performed. D'Agostino & Pearson, Kruskal-Wallis, and Dunn post-hoc and normality tests were used. Results: G2 insertion and fracture torques were significantly higher than G1 and G3 insertion and fracture torques (p<0.05). The pull-out and percussion tests presented similar values among the groups. SEM revealed that the fracture point was predominantly on the fourth thread for steel MIs (G1 and G2) and on the seventh thread for titanium-aluminum-vanadium MIs (G3). Conclusion: The mechanical properties of stainless steel MIs are superior to those of titanium-aluminum-vanadium alloy MIs.

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“…POD has several advantages, such as a simpler surgical protocol, less trauma to the surrounding tissues during insertion [ 3 ] and removal, minimal anatomical restrictions, and the possibility of immediate loading after implantation [ 4 ]. At the same time, there is evidence of a lower rate of loss of tandem mini-implants compared to single ones, which allows one to speak about the prospects for using POD on several supports [ 5 ]. The literature describes two techniques for using skeletal support: direct and indirect support.…”

Section: Introductionmentioning

confidence: 99%

Construction of Customized Palatal Orthodontic Devices on Skeletal Anchorage Using Biomechanical Modeling

et al. 2022

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Orthodontic implants have been developed for the implementation of skeletal anchorage and are effectively used in the design of individual orthodontic devices. However, despite a significant amount of clinical research, the biomechanical aspects of the use of skeletal anchorage have not been adequately studied. The aim of this work was to numerically investigate the stress–strain state of the developed palatal orthodontic device supported by mini-implants. Four possible options for the placement of mini-implants in the bone were analyzed. The effect of a chewing load of 100 N on the bite plane was investigated. The study was carried out using biomechanical modeling based on the finite element method. The installation of the palatal orthodontic device fixed on mini-implants with an individual bite plane positioned on was simulated. The dependence of equivalent stresses and deformation changes on the number and location of the supporting mini-implants of the palatal orthodontic device was investigated. Two materials (titanium alloy and stainless steel) of the palatal orthodontic device were also investigated. The choice of a successful treatment option was based on the developed biomechanical criteria for assessing the surgical treatment success. Application of the criteria made it possible to estimate the stability and strength of fixation of each of the considered mini-implants installation options. As a result, options for the mini-implants optimal placement were identified (the first and the fourth which provide distributed front and side support of the device), as well as the preferred material (titanium alloy) for the manufacture of the palatal orthodontic device.

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Evaluation of primary stability of innovated orthodontic miniscrew system (STS): An ex-vivo study

Cited by 8 publications

References 26 publications

Reliability of Orthodontic Miniscrews: Bending and Maximum Load of Different Ti-6Al-4V Titanium and Stainless Steel Temporary Anchorage Devices (TADs)

Reliability of Orthodontic Miniscrews: Bending and Maximum Load of Different Ti-6Al-4V Titanium and Stainless Steel Temporary Anchorage Devices (TADs)

Mechanical Properties of Mini-Implants Used in Extra-Radicular Anchorage

Construction of Customized Palatal Orthodontic Devices on Skeletal Anchorage Using Biomechanical Modeling

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