scholarly journals Development and Validation of 3D Finite Element Models for Prediction of Orthodontic Tooth Movement

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Udomsak Likitmongkolsakul ◽  
Pruittikorn Smithmaitrie ◽  
Bancha Samruajbenjakun ◽  
Juthatip Aksornmuang
Keyword(s):  
Finite Element ◽  
Tooth Movement ◽  
Three Dimensional ◽  
Orthodontic Tooth Movement ◽  
Movement Pattern ◽  
Reference Points ◽  
3D Finite Element ◽  
Canine Retraction ◽  
Calculated Stress ◽  
Combining Data

Objectives. The aim of this study was to develop and validate three-dimensional (3D) finite element modeling for prediction of orthodontic tooth movement. Materials and Methods. Two orthodontic patients were enrolled in this study. Computed tomography (CT) was captured 2 times. The first time was at T0 immediately before canine retraction. The second time was at T4 precisely at 4 months after canine retraction. Alginate impressions were taken at 1 month intervals (T0–T4) and scanned using a digital scanner. CT data and scanned models were used to construct 3D models. The two measured parameters were clinical tooth movement and calculated stress at three points on the canine root. The calculated stress was determined by the finite element method (FEM). The clinical tooth movement was measured from the differences in the measurement points on the superimposed model. Data from the first patient were used to analyze the tooth movement pattern and develop a mathematical formula for the second patient. Calculated orthodontic tooth movement of the second patient was compared to the clinical outcome. Results. Differences between the calculated tooth movement and clinical tooth movement ranged from 0.003 to 0.085 mm or 0.36 to 8.96%. The calculated tooth movement and clinical tooth movement at all reference points of all time periods appeared at a similar level. Differences between the calculated and clinical tooth movements were less than 0.1 mm. Conclusion. Three-dimensional FEM simulation of orthodontic tooth movement was achieved by combining data from the CT and digital model. The outcome of the tooth movement obtained from FEM was found to be similar to the actual clinical tooth movement.

scholarly journals Biomechanical Characteristics of Microimplant for Anchorage in Orthodontics: A 3D Finite Element Model Study

2013 ◽  
Vol 14 (6) ◽  
pp. 1076-1079
Author(s):  
NK Lokesh ◽  
CMS Krishna Prasad ◽  
D Lakshmayya Naidu ◽  
T Harini ◽  
H Vidyadhara Lakshmi ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Tooth Movement ◽  
Orthodontic Tooth Movement ◽  
Element Model ◽  
3D Finite Element ◽  
Bone Stress ◽  
3D Finite Element Model ◽  
Model Study ◽  
Stress And Deformation

ABSTRACT In orthodontic treatment, anchorage control is essential for success. A recent development, stationary anchorage (microimplants) eliminates one of the uncertainties of orthodontic tooth movement by offering absolute control over potentially undesirable counter movements. The objective of this study was to establish a 3D finite element model for microimplant and to analyze the influence of different angulations to the long axis of the teeth (30-90°) on the biomechanical characteristics of orthodontic anchorage implant-bone interface. Results of this study showed that largest stress and deformation was seen in the cortical bone and upper region of trabecular bone. Stress and deformation increased as the angulations of the implant to the long axis of the tooth increased. As the angulation of the implant to the long axis of maxillary 1st molar increased, stress and deformation also decreased. Maximum stress and displacement were recorded when implant was placed perpendicular to the long axis of maxillary 1st molar. How to cite this article Naidu DL, Harini T, Prasad CMSK, Lakshmi HV, Lokesh NK, Dharmesh HS. Biomechanical Characteristics of Microimplant for Anchorage in Orthodontics: A 3D Finite Element Model Study. J Contemp Dent Pract 2013;14(6):1076-1079.

scholarly journals Efficacy of transpalatal arch as an anchorage reinforcing unit during orthodontic space closure: A three-dimensional finite element study

2017 ◽  
Vol 7 ◽  
pp. 94-100
Author(s):  
Vishal Shrishail Kudagi ◽  
N. Vijay ◽  
H. C. Kiran Kumar ◽  
K. Sadashiva Shetty
Keyword(s):  
Finite Element ◽  
Alveolar Bone ◽  
Tooth Movement ◽  
Three Dimensional ◽  
Orthodontic Tooth Movement ◽  
Slice Thickness ◽  
Element Analysis ◽  
Orthodontic Force ◽  
Orthodontic Space Closure ◽  
Transpalatal Arch

Background and Objectives Connecting the contralateral upper molars by means of a transpalatal arch (TPA) is thought to decrease the tendency of the molars to move mesially in response to orthodontic force (i.e., provide orthodontic anchorage). This study was hence conducted to investigate the effects of the TPA on the displacement of the molars and stresses generated in the periodontium during orthodontic tooth movement using the finite element method (FEM). Materials and Methods A three-dimensional (3D) model was generated using medical modeling software (Mimics) using the computed tomography slice images of the skull which were obtained at a slice thickness of 1 mm. From this, the finite element model was built using HyperMesh and analysis was performed using PATRAN software (MSC Software Corporation, 4675 MacArthur Court, Newport Beach, California 92660). The 3D finite element models were fabricated in two versions such as maxillary first molars including their associated periodontal ligament and alveolar bone one with TPA and another without TPA. Both were subjected to orthodontic forces, and the resultant stress patterns and displacements between the models with and without TPA were determined. Results The stress and displacement plots in this study failed to show any significant differences in stress and displacement within the periodontium of molars, between the two models – one with TPA and the other without, in response to the orthodontic force. Interpretation and Conclusion The results of the current finite element analysis, therefore, suggest that the presence of a TPA brings about no change in the initial dental and periodontal stress distribution and displacement.

scholarly journals Finite Element Analysis of Mandibular Anterior Teeth with Healthy, but Reduced Periodontium

2021 ◽  
Vol 11 (9) ◽  
pp. 3824
Author(s):  
Ioana-Andreea Sioustis ◽  
Mihai Axinte ◽  
Marius Prelipceanu ◽  
Alexandra Martu ◽  
Diana-Cristala Kappenberg-Nitescu ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Periodontal Ligament ◽  
Tooth Movement ◽  
Orthodontic Tooth Movement ◽  
Real Data ◽  
Element Analysis ◽  
Anterior Teeth ◽  
Applied Forces ◽  
Orthodontic Forces

Finite element analysis studies have been of interest in the field of orthodontics and this is due to the ability to study the stress in the bone, periodontal ligament (PDL), teeth and the displacement in the bone by using this method. Our study aimed to present a method that determines the effect of applying orthodontic forces in bodily direction on a healthy and reduced periodontium and to demonstrate the utility of finite element analysis. Using the cone-beam computed tomography (CBCT) of a patient with a healthy and reduced periodontium, we modeled the geometric construction of the contour of the elements necessary for the study. Afterwards, we applied a force of 1 N and a force of 0.8 N in order to achieve bodily movement and to analyze the stress in the bone, in the periodontal ligament and the absolute displacement. The analysis of the applied forces showed that a minimal ligament thickness is correlated with the highest value of the maximum stress in the PDL and a decreased displacement. This confirms the results obtained in previous clinical practice, confirming the validity of the simulation. During orthodontic tooth movement, the morphology of the teeth and of the periodontium should be taken into account. The effect of orthodontic forces on a particular anatomy could be studied using FEA, a method that provides real data. This is necessary for proper treatment planning and its particularization depends on the patient’s particular situation.

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