Overall stress in periodontal ligament under orthodontic movement during a periodontal breakdown

2021 ◽  
Author(s):  
Radu-Andrei Moga ◽  
Stefan Marius Buru ◽  
Cosmin Grula Chiorean
Keyword(s):  
Periodontal Ligament ◽  
Orthodontic Movement ◽  
Periodontal Breakdown

Compressive stress in periodontal ligament under orthodontic movements during periodontal breakdown

2021 ◽  
Vol 159 (3) ◽  
pp. e291-e299
Author(s):  
Radu Andrei Moga ◽  
Stefan Marius Buru ◽  
Cosmin Gruia Chiorean ◽  
Raluca Cosgarea
Keyword(s):  
Compressive Stress ◽  
Periodontal Ligament ◽  
Periodontal Breakdown

scholarly journals Epithelial rests of Malassez: from latent cells to active participation in orthodontic movement

2017 ◽  
Vol 22 (3) ◽  
pp. 119-125
Author(s):  
Bianca Silva e Silva ◽  
Nathalia Carolina Fernandes Fagundes ◽  
Bárbara Catarina Lima Nogueira ◽  
José Valladares Neto ◽  
David Normando ◽  
...  
Keyword(s):  
Literature Review ◽  
Functional Activity ◽  
Periodontal Ligament ◽  
Potential Functions ◽  
Functional Structure ◽  
Tissue Structure ◽  
Periodontal Tissue ◽  
Orthodontic Movement ◽  
Epithelial Rests Of Malassez ◽  
Cellular Debris

ABSTRACT Introduction: The epithelial rests of Malassez (ERM) represent a group of cells in the periodontal ligament classically consisting of latent or quiescent structures associated with pathological processes. However, recent evidence shows that these structures cannot be considered only as cellular debris. The ERM is a major tissue structure, with functions in maintaining the homeostasis of periodontal tissue, including the maintenance of orthodontic movement. Objective: The present literature review aims at presenting the potential functions of ERM, with emphasis on orthodontic movement and the functional structure of the periodontium. Conclusion: ERM cells have a functional activity in modulation of orthodontic movement, trough their potential for differentiation, maintenance functions and the capacity of repairing periodontium.

scholarly journals Advancements in the knowledge of induced tooth movement: idiopathic osteosclerosis, cortical bone and orthodontic movement

2012 ◽  
Vol 17 (4) ◽  
pp. 12-16 ◽  
Author(s):  
Alberto Consolaro ◽  
Renata Bianco Consolaro
Keyword(s):  
Cortical Bone ◽  
Periodontal Ligament ◽  
Tooth Movement ◽  
No Reduction ◽  
Root Resorption ◽  
Slight Degree ◽  
Risk Of Death ◽  
Cortical Areas ◽  
Orthodontic Movement ◽  
Applied Forces

Moving teeth orthodontically through the dense trabecular bone and cortical areas may require a reduction in the intensity and/or concentration of the applied forces. In part, the orthodontic applied forces are dissipated and reduced by bone deflection, which normally occurs by a slight degree of elasticity of bone tissue in normal conditions. In areas of dense trabecular and in cortical bone this deflection should be insignificant or nonexistent. If there is no reduction in the intensity of the forces in these mentioned regions, the entire force will focus on the structure of the periodontal ligament, increasing the risk of death of cementoblasts, hyalinization and root resorption. Further studies could assess the prevalence of these consequences in populations selected for this purpose, so that would no longer be randomly observed notes.

scholarly journals The action of corticosteroids on orthodontic tooth movement: a literature review

2012 ◽  
Vol 17 (6) ◽  
pp. 20e1-20e5
Author(s):  
Luegya Amorim Henriques Knop ◽  
Ricardo Lima Shintcovsk ◽  
Luciana Borges Retamoso ◽  
Ana Maria Trindade Grégio ◽  
Orlando Tanaka
Keyword(s):  
Periodontal Ligament ◽  
Orthodontic Treatment ◽  
Tooth Movement ◽  
Orthodontic Tooth Movement ◽  
Sterile Inflammation ◽  
X Rays ◽  
Pharmacological Agents ◽  
Orthodontic Movement ◽  
Multiple Reactions ◽  
Biomechanical Forces

INTRODUCTION: Tooth movement is initially characterized by an acute sterile inflammation, followed by sequential multiple reactions in the periodontal ligament in response to biomechanical forces. Pharmacological agents such as corticosteroids may affect the course of orthodontic movement. Scientific studies show antagonistic actions of these drugs on bone resorption during tooth movement. OBJECTIVE: To review the literature about the effect of corticosteroids on orthodontic tooth movement. CONCLUSION: Patients should be questioned regarding the use of these drugs in the orthodontic practice and for those who use them, the orthodontic treatment should be differentiated, with longer intervals between visits and periodic X-rays due to the delay in bone formation observed in some scientific studies.

scholarly journals Periodontal ligament enhancement after orthodontic movement in third molars: Proliferative stimulus or increased periodontal ligament space?

2021 ◽  
Vol 160 (1) ◽  
pp. 7
Author(s):  
Marcio José da Silva Campos ◽  
Jocimara Domiciano Fartes de Almeida Campos ◽  
Gustavo Silva Maximiano ◽  
Robert Willer Farinazzo Vitral
Keyword(s):  
Periodontal Ligament ◽  
Third Molars ◽  
Orthodontic Movement

scholarly journals Concrescence: can the teeth involved be moved or separated?

2020 ◽  
Vol 25 (1) ◽  
pp. 20-25
Author(s):  
Alberto Consolaro ◽  
Omar Hadaya ◽  
Dario A. Oliveira Miranda ◽  
Renata Bianco Consolaro
Keyword(s):  
Periodontal Ligament ◽  
Orthodontic Movement ◽  
Surgical Access ◽  
Maxillary Molars ◽  
Unerupted Teeth ◽  
Proper Response ◽  
Made In

ABSTRACT The atrophy of the periodontal ligament places the tooth very close to the bone or another tooth, as occurs in unerupted teeth. The absent interdental bone and the lack of functional periodontal stimulus may lead to the fusion of the appositional layers of cement between the roots of the teeth. Concrescence almost always occurs in the region of the maxillary molars. Asymptomatic, it should always be remembered when the proper response to orthodontic movement is not obtained, and there is no apparent explanation. When surgically extracting a tooth and there is resistance, insisting will not be the best strategy. Moving the teeth with concrescence is not convenient, as it requires very intense forces. Once separated, these teeth can be considered normal for movement. It is possible to separate two teeth presenting concrescence, but it depends on the extension of the area, the surgical access and, especially, the clinical convenience. The tooth to be extracted will be repaired with new cement deposited in the sectioned area. The simple separation with the maintenance of the proximity and the lack of function of one of the teeth will cause a new concrescence. After a period of 1 to 3 months, the separated teeth are biologically prepared to be moved. The most important detail in this separation of teeth presenting concrescence is that the diagnosis should be made in advance, and not at the time of the intervention.

scholarly journals Effect of the bracketless orthodontics technique and resin composite material on the biomechanical response of the upper central incisor: 3D finite element analysis

2021 ◽  
Vol 0 ◽  
pp. 1-10
Author(s):  
Guaracy Lyra Fonseca ◽  
Ney Tavares Lima Neto ◽  
Marcos Gabriel do Lago Prieto ◽  
Felipe Azevedo ◽  
Cristina Harrop ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Periodontal Ligament ◽  
Composite Resin ◽  
Resin Composite ◽  
Central Incisor ◽  
Element Analysis ◽  
3D Finite Element ◽  
Orthodontic Movement ◽  
Orthodontic Wire ◽  
Biomechanical Response

Objectives: The bracketless orthodontic treatment (BOT) is an alternative technique which indicates using an orthodontic appliance composed of wires and composite resin assisted by 3D technology. However, the biomechanical response of central incisor orthodontic movement has yet to be investigated. Thus, the aim of the present investigation was to calculate the stress magnitude in central incisor movement through 3D finite element analysis using different wire diameters (0.012”, 0.014”, and 0.016”) of nickel–titanium wire and two different resin composites (Opallis and Filtek). Materials and Methods: A 3D volume composed of enamel, dentin, cortical bone, cancellous bone, periodontal ligament, composite resin, and different orthodontic wire diameters was designed. After the modeling process, the models were exported to computer-aided engineering software divided into a finite number of elements, and a mechanical structural static analysis was conducted. Results: The stress results were plotted on colorimetric maps and in tables for comparison between the different models. The results showed that the central incisor orthodontic movement with BOT does not induce damage to the periodontal ligament, dental root, or bone tissue, regardless of the simulated orthodontic wire diameter and resin composite materials. The palatal composite resin and orthodontic wire also presented acceptable stress magnitude during orthodontic movement. Conclusion: Thus, the BOT technique promoted a suitable biomechanical response during central incisor movement regardless the resin composite.

Histomorphometric study of the periodontal ligament in the initial period of orthodontic movement in Wistar rats with induced allergic asthma

2012 ◽  
Vol 142 (3) ◽  
pp. 333-338 ◽  
Author(s):  
Cristiane Correia Pereira Machado ◽  
Matilde da Cunha Gonçalves Nojima ◽  
Patrícia Machado Rodrigues e Silva ◽  
Carlos Alberto Mandarim-de-Lacerda
Keyword(s):  
Allergic Asthma ◽  
Periodontal Ligament ◽  
Wistar Rats ◽  
Initial Period ◽  
Orthodontic Movement ◽  
Histomorphometric Study
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