Three-dimensional finite element analysis for determining the stress distribution after loading the bone surface with two-component mini-implants of varying length

Choi, Bohm; Lee, Dong Ok; Mo, Sung Seo; Kim, Seong Hun; Park, Ki Ho; Chung, Kyu Rhim; Nelson, Gerald; Han, Sang-Cheol

doi:10.4041/kjod.2011.41.6.423

Cited by 8 publications

(10 citation statements)

References 22 publications

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“…Our results agree with those of Choi et al 5 , who used a lateral force of 2 N, also reporting that the stress in the adjacent bone increases with the increasing height of the miniscrew head and the point of application of force.…”

supporting

confidence: 82%

“…MOI are perhaps the most versatile and most widely used of these devices, providing 'absolute anchorage' in three dimensional space in most cases. Furthermore, the ideal skeletal conditions for their placement (1-3), potential locations (4) and biomechanical properties (5) have been studied. Miniscrews may be made of type 5 titanium alloy (the most common), steel or lactic-glycolic.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the thickness of cortical bone on the stability of orthodontic miniscrews

Plana¹,

Villafranca²,

Escalada³

et al. 2013

J Dentofacial Anom Orthod

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Three 10-mm-long miniscrews commonly employed in orthodontic treatment were compared in four different situations involving diverse thicknesses of cortical bone. The finite element method (FEM) was used in the study, in which a force of 250 g was applied in two directions: perpendicular and parallel to the bone surface. As the parameter under study was the thickness of cortical bone, simulations were performed in four different bone loss situations: 2.5, 2, 1.5 and 1 mm. Our aim was also to quantify the stresses and displacements generated when applying a force of 250 g perpendicular and parallel to the bone surface under the same skeletal conditions. The results reveal similar performance in the three analysed samples, with increased stresses and displacements in the surrounding bone in relation to similar variations in the thickness of cortical bone.

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supporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Influence of the thickness of cortical bone on the stability of orthodontic miniscrews

Plana¹,

Villafranca²,

Escalada³

et al. 2013

J Dentofacial Anom Orthod

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“…The present study showed highest stresses on lateral incisors, and this may be due to the short roots of the lateral incisors [40]. Burstone and Viecilli [41] stated that it is a natural concept that larger teeth have more PDL and root support than smaller teeth, and hence, when the same load is applied, the stress magnitudes in the PDL for larger teeth are smaller and larger for smaller teeth.…”

Section: Discussionmentioning

confidence: 68%

Evaluating the effects of consolidation on intrusion and retraction using temporary anchorage devices—a FEM study

et al. 2017

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BackgroundExtraction of premolars and retracting the anterior teeth using mini-implants and anterior retraction hooks became advent now a day. In such treatments, consolidation of arches is not done in regular practice. So, the present study is concentrated on effects of consolidation in two implant and three implant combinations of retraction and intrusion.MethodsA three-dimensional FEM model of maxillary teeth and periodontal ligament housed in the alveolar bone with the first premolars extracted is generated with appropriate number of elements and nodes. The models were broadly divided into two groups according to the no. of implants. Mini-implants were placed bilaterally between the second premolar and molar at varying heights (7, 10, 13 mm) in group I, and along with bilateral implants, an additional mid-implant is placed between the central incisors as group II. Brackets with 0.022 slot were placed on the teeth, 19 × 25 SS wire is placed in the brackets, an anterior retraction hook was placed at 9 mm height, and analysis was done to evaluate the stresses and displacement patterns in consolidation and non-consolidation models.ResultsThe results showed that consolidation of the anterior teeth during intrusion and retraction shows various advantages such as less stresses on the bone, PDL, implant, teeth, and no labial flaring of the anterior teeth and three implant system, i.e., two bilateral implant at 10 mm and a mid-implant at 12 mm between the centrals has shown to be better than other models as bodily movement is observed.ConclusionConsolidation is better than non consolidation during enmasse retraction and intrusion.

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“…5 Previously published literature has shown a positive correlation between the biomechanical characteristics of mini-screws and their in vivo performance. 5,11 The Temporary Anchorage Devices (TADs) placement torque (PT) is defined as the quantifiable measure of resistance to insertion of the anchorage device. It has been seen that the insertion torque is higher in the mandible compared to the maxilla, and there are more chances of failure of the TADs because of high torque during placement.…”

Section: Introductionmentioning

confidence: 99%

“…3,4 Several studies have been conducted on the clinical behavior of mini-screws and have concluded that a variety of factors such as type of mini-screws, dimensions, angle of insertion, insertion torque and force, placement site, and even proximity to roots are responsible for the success or failure of mini-screws. [5][6][7][8][9][10] Although the success of mini-screws can be attributed to multiple factors, primary stability has been shown to be of utmost importance. Primary stability of mini-screws is observed in bone remodeling, and it can be described as a favorable tissue response from the hard tissues.…”

Section: Introductionmentioning

confidence: 99%

Does the Miniscrew Length, Insertion Level, and Insertion Force Make a Difference on the Stress and Strain Distribution Across the Alveolar Bone? A Finite Element Study

Marya,

Eugenio,

Venugopal

et al. 2023

J Indian Orthod Soc

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Objective The aim of this study was to evaluate, using the finite element method (FEM), the stresses generated on various parts of the mini-screw and on the bone resulting from the insertion of mini-screws of varying lengths and under different forces. Materials and Methods Three-dimensional models of mini-screws (1.6 × 6, 8, and 10 mm) and bone (mandible cortical bone thickness of 2 mm) were constructed and simulated using FEM. The mini-screws were inserted using force loads of 10 and 20 Ncm, and stress evaluation was carried out on screws and bone. The stress evaluation was also performed across different levels of insertion (at the point of insertion, half-insertion, and full insertion). Results A direct correlation between the force applied and the stresses on the body of the screws was observed. There was an inverse relationship between the length of the mini-screw and the resulting stress on the bone with the highest stress of 14.58 Mpa with 6 mm long and the minimum stress of 3.81 Mpa with longer mini-screws. On application of different force magnitudes, the stress levels increased linearly with a change in the length. The highest stresses on the bone were observed only when the screw was fully inserted in the bone. Conclusion When mini-screws of different lengths were inserted using different magnitudes of forces, the stress levels increased linearly on the bone. A combination of longer mini-screw and lesser force magnitude used during insertion produced less stress on the bone.

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Three-dimensional finite element analysis for determining the stress distribution after loading the bone surface with two-component mini-implants of varying length

Cited by 8 publications

References 22 publications

Influence of the thickness of cortical bone on the stability of orthodontic miniscrews

Influence of the thickness of cortical bone on the stability of orthodontic miniscrews

Evaluating the effects of consolidation on intrusion and retraction using temporary anchorage devices—a FEM study

Does the Miniscrew Length, Insertion Level, and Insertion Force Make a Difference on the Stress and Strain Distribution Across the Alveolar Bone? A Finite Element Study

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