Finite element analysis on tooth and periodontal stress under simulated occlusal loads

Zhang, H.; Cui, Jianwei; Lu, Xuesong; Wang, Meiqing

doi:10.1111/joor.12512

Cited by 16 publications

(15 citation statements)

References 29 publications

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“…Based on the micro-CT images, a 3D FE model of five roots of the first molar during OTM was developed. This model could accurately reproduce the tooth-PDL-bone structure, which is generally assumed to be a simple geometry in previous FE analyses (Kamble et al, 2012; Zhang et al, 2017). In the FE analysis, we mainly focused on horizontal force by the line pressure, mimicking orthodontic tipping tooth movement.…”

Section: Resultsmentioning

confidence: 99%

Stress Distribution and Collagen Remodeling of Periodontal Ligament During Orthodontic Tooth Movement

Jin

et al. 2019

Front. Pharmacol.

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Periodontal ligament (PDL), as a mechanical connection between the alveolar bone and tooth, plays a pivotal role in force-induced orthodontic tooth movement (OTM). However, how mechanical force controls remodeling of PDL collagenous extracellular matrix (ECM) is largely unknown. Here, we aimed to evaluate the stress distribution and ECM fiber remodeling of PDL during the process of OTM. An experimental tooth movement model was built by ligating a coil spring between the left maxillary first molar and the central incisors. After activating the coil spring for 7 days, the distance of tooth movement was 0.324 ± 0.021 mm. The 3D finite element modeling showed that the PDL stress obviously concentrated at cervical margin of five roots and apical area of the mesial root, and the compression region was distributed at whole apical root and cervical margin of the medial side (normal stress < −0.05 MPa). After force induction, the ECM fibers were disordered and immature collagen III fibers significantly increased, especially in the apical region, which corresponds to the stress concentration and compression area. Furthermore, the osteoclasts and interleukin-1β expression were dramatically increased in the apical region of the force group. Taken together, orthodontic loading could change the stress distribution of PDL and induce a disordered arrangement and remodeling of ECM fibers. These findings provide orthodontists both mechanical and biological evidences that root resorption is prone to occur in the apical area during the process of OTM.

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Section: Resultsmentioning

confidence: 99%

Stress Distribution and Collagen Remodeling of Periodontal Ligament During Orthodontic Tooth Movement

Jin

et al. 2019

Front. Pharmacol.

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“…Due to this, analysis of the distribution of stresses generated by occlusal or masticatory loads, in a biological system such as the teeth, is a complex problem [ 7 ], because of the nature of the tissues of the dental organ, such as nonhomogeneous materials and the geometric irregularities of their contours and anatomical forms. In addition to this, the tooth in its structure is formed by enamel, dentine, and pulp, whose mechanical properties differ from one another.…”

Section: Introductionmentioning

confidence: 99%

Mechanobiological Analysis of Molar Teeth with Carious Lesions through the Finite Element Method

Hernández-Vázquez

Romero-Ángeles

Urriolagoitia-Sosa

et al. 2018

Applied Bionics and Biomechanics

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The analysis of the distribution of stress in dental organs is a poorly studied area. That is why computational mechanobiological analysis at the tissue level using the finite element method is very useful to achieve a better understanding of the biomechanics and the behaviour of dental tissues in various pathologies. This knowledge will allow better diagnoses, customize treatment plans, and establish the basis for the development of better restoration materials. In the present work, through the use of high-fidelity biomodels, computational mechanobiological analyses were performed on four molar models affected with four different degrees of caries, which are subjected to masticatory forces. With the analyses performed, it is possible to observe that the masticatory forces that act on the enamel are not transmitted to the dentin and to the bone and periodontal ligament to protect the nerve, as it happens in a healthy dental organ. With the presence of decay, these forces are transmitted partly to the pulp. The reactions to the external loads on the dental organs depend on the advances of the carious lesion that they present, since the distribution of stresses is different in a healthy tooth.

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“…Finite element (FE) analysis has been widely used to simulate different behaviors in dentofacial orthopedics and dental biomechanics (Ammar, Ngan, Crout, Mucino, & Mukdadi, ; Borcic et al, ; Cattaneo, Dalstra, & Melsen, ; Chang, Shin, & Baek, ; Field et al, ; Geramy & Morgano, ; Hsu, Chen, Chen, Huang, & Chang, ; Kibi et al, ; Lee, Choi, Lee, Ahn, & Noh, ; Liang, Rong, Lin, & Xud, ; Liu, Chang, Wong, & Liu, ; Rudolph, Willes, & Sameshima, ; Singh, Mogra, Shetty, Shetty, & Philip, ; Soares et al, ; Toms & Eberhardt, ; Vukicevic, Zelic, Jovicic, Djuric, & Filipovic, ; Yu, Baik, Sung, Kim, & Cho, ; Zhang, Cui, Lu, & Wang, ), because of many problematic issues in clinical testing, such as subject discomfort and limit of accessible areas. In the study conducted by Lee et al (), FE analysis was performed to investigate the mechanical effect of different protrusion positions of a mandibular advancement device (MAD) on teeth and facial bones, since the MAD‐induced stress and strain have not been measured directly from living structures.…”

Section: Introductionmentioning

confidence: 99%

“…Ammar et al () used the FE jawbone model to simulate canine retraction with mini‐screw anchorage and compared stresses on the mini‐screw and fracture failure of tangential orthodontic forces. Zhang et al () constructed a mandibular first molar FE model and simulated various occlusal load conditions through area size, location, and direction of loading. Rudolph et al () and Cattaneo et al () also performed FE analyses of a 1 or 2 teeth model applying various orthodontic tooth movements and evaluating stress at the tooth, periodontal ligament (PDL), and alveolar bone.…”

Section: Introductionmentioning

confidence: 99%

An investigation into structural behaviors of skulls chewing food in different occlusal relationships using FEM

Lee

Chun

2019

Clinical & Exp Dental Res

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Objectives This study aims to investigate the effect of different occlusal relationships on skull structural and mechanical behaviors through simulation of chewing food. Methods Finite element (FE) skull models of occlusion for Class I, end‐on Class II, and full‐cusp Class II were generated. End‐on Class II and full‐cusp Class II were chosen as mild and severe Class II occlusions, respectively. A simplified food bolus was introduced between the upper and lower dentition of the right molars. Chewing food was simulated in the skulls by moving the mandible. An experiment was conducted to measure strains at selective locations and compared them to the analytical results for validation. Results In the early stages of mandibular movement, masticatory forces predicted from the skull models without food were lower than the skull models with food but increased drastically after occluding teeth full enough. As a result, the relationship between masticatory force and mandible movement shows that there is no significant difference between the skull models with food and without food in the range of human masticatory force, approximately 250 N. In all the cases of skulls including a food bolus, stress was similarly propagated from the mandible to the maxilla and concentrated in the same regions, including the mandibular notch and alveolar bone around the lower molars. Conclusion It is predicted that there is no significant difference of bite force–mandible movement relationships and stress distributions of skull and teeth, between end‐on Class II and full‐cusp Class II models. When simulating chewing activities on candy and carrot, it is also found that there is no difference of masticatory performance between Class II occlusions, from structural as well as mechanical perspectives.

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Finite element analysis on tooth and periodontal stress under simulated occlusal loads

Cited by 16 publications

References 29 publications

Stress Distribution and Collagen Remodeling of Periodontal Ligament During Orthodontic Tooth Movement

Stress Distribution and Collagen Remodeling of Periodontal Ligament During Orthodontic Tooth Movement

Mechanobiological Analysis of Molar Teeth with Carious Lesions through the Finite Element Method

An investigation into structural behaviors of skulls chewing food in different occlusal relationships using FEM

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