FE analysis of conceptual hybrid composite endodontic post designs in anterior teeth

Gloria, Antonio; Maietta, Saverio; Martorelli, Massimo; Lanzotti, Antonio; Watts, David C.; Ausiello, Pietro

doi:10.1016/j.dental.2018.04.004

Cited by 39 publications

(71 citation statements)

References 44 publications

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“…A non‐linear structural static analysis assuming large deformations was performed to evaluate the tooth in different clinical scenarios using the finite element package ANSYS ® 17.1 (Canonsburg, PA, USA) in a Dell Precision™ Workstation T7910 (Hopkinton, MA, USA). Elastic, linear and homogeneous material properties were assumed for enamel (Gialain et al ), dentine (Gloria et al ), cementum (Malek et al . ) and bone (Liao et al ) (Table ), whereas a non‐linear hyperelastic material was assumed for the periodontal ligament using a nine parameters Mooney–Rivlin constitutive equation (Qian et al ):

\begin{matrix} W & = C_{10} (I_{1} - 3) + C_{01} (I_{2} - 3) \\ + C_{11} (I_{1} - 3) (I_{2} - 3) + C_{20} {()(, I_{2} - 3)}^{2} \\ + C_{30} {()(, I_{1} - 3)}^{3} \end{matrix}

where W is the stored deviatoric third‐order deformation strain energy function, I 1 , I 2 and I 3 are the strain invariants, and C 10 , C 01 , C 11 , C 20 and C 30 are material parameters described in Table .…”

Section: Methodsmentioning

confidence: 99%

“…A non-linear structural static analysis assuming large deformations was performed to evaluate the tooth in different clinical scenarios using the finite element package ANSYS â 17.1 (Canonsburg, PA, USA) in a Dell Precision TM Workstation T7910 (Hopkinton, MA, USA). Elastic, linear and homogeneous material properties were assumed for enamel (Gialain et al 2016), dentine (Gloria et al 2018), cementum (Malek et al 2003) and bone (Liao et al 2016) (Table 1), whereas a non-linear hyperelastic material was assumed for the periodontal ligament using a nine parameters Mooney-Rivlin constitutive equation (Qian et al 2009):…”

Section: Finite Element Analysis (Fea)mentioning

confidence: 99%

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Biomechanical performance of an immature maxillary central incisor after revitalization: a finite element analysis

et al. 2019

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Aim To investigate the stress distribution in an immature maxillary incisor and the same tooth after simulated revitalization with deposition of tubular dentine or cementum by finite element analysis (FEA). Methodology A finite element model of a maxillary central incisor was developed on the basis of a µCT scan. The tooth was segmented in two parts: a part that represented a tooth in an immature state and an apical part that represented the tissue formed after revitalization. The apical part was given the mechanical properties of dentine or cementum. The immature tooth and the same tooth reinforced by either dentine or cementum underwent simulation of biting, trauma and orthodontic movement. Von Mises stress values were compared between the scenarios and tooth segments. Results Maximum stress in the immature incisor developed apically; however, dentine‐ and cementum‐reinforced teeth revealed the greatest stress in the external portion of the root decreasing towards the apex. Greatest mechanical stress was caused by dental trauma perpendicular to the long axis of the root followed by biting and orthodontic movement. Stress peaks were lower in the dentine‐reinforced tooth compared with the cementum‐reinforced tooth in all scenarios; however, median stress in the immature part was reduced irrespective of dentine or cementum deposition. Dentine reinforcement caused greater stress values in the apical segment due to absorbance of the applied force, whereas stress was not transferred towards deposited cementum. Conclusions Apposition of simulated hard tissue in a maxillary central incisor after revitalization reduced mechanical stress in the immature tooth. Formation of dentine was advantageous because, unlike cementum, it facilitated an even stress distribution throughout the root resulting in lower stress values.

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\begin{matrix} W & = C_{10} (I_{1} - 3) + C_{01} (I_{2} - 3) \\ + C_{11} (I_{1} - 3) (I_{2} - 3) + C_{20} {()(, I_{2} - 3)}^{2} \\ + C_{30} {()(, I_{1} - 3)}^{3} \end{matrix}

Section: Methodsmentioning

confidence: 99%

Section: Finite Element Analysis (Fea)mentioning

confidence: 99%

Biomechanical performance of an immature maxillary central incisor after revitalization: a finite element analysis

et al. 2019

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“…31 Although this situation was observed in other forms of posts, it was not observed in the biological dentin post. Gloria et al 32 stated that stress distribution was along the post and at the interface between the post and the surrounding structure. In a similar study by Belli et al, 25 a 300-N force was applied to the palatal region; the resultant stress was concentrated in the cervical region of the models.…”

Section: Force Direction Post Type Maximum Von Mises Stress Values (Mmentioning

confidence: 99%

Root canal reconstruction using biological dentin posts: A 3D finite element analysis

Falakaloğlu

Adıgüzel

Ozdemir

2019

J Dent Res Dent Clin Dent Prospects

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Background. Several types of post have been developed for clinical use. A biological dentin post obtained from an extracted tooth eliminates the problems arising from material differences and reduces the fracture rate in teeth undergoing root canal treatment. This study used finite element analysis to compare a biological dentin post with posts made of two different materials. Methods. Three 3D models of the upper central incisor were created, and stainless-steel, glass fiber and biological dentin posts were applied to these models. The restoration of the models was completed by applying a composite as the core structure and a ceramic crown as the superstructure. Using finite element stress analysis in the restoration models, a 100-N force was applied in the vertical and horizontal directions and at a 45º angle, and the suitability of the biological dentin post was evaluated by comparing the data. Results. Under the applied forces, the greatest stress accumulation was seen in the models with the stainless steel post. Because the stainless steel post was more rigid, stress forces accumulated on the surface instead of being transmitted to the tooth tissue. In the models with the glass fiber and biological dentin posts, the post material responded to the stratification in tandem with the dental tissue and did not cause excessive stress accumulation on the tooth or post surfaces. Conclusion. The results showed that biological dentin posts prevent the accumulation of stresses that might cause fractures in teeth undergoing root canal treatment. In addition, the physical compatibility and biocompatibility of a biological dentin post with the tooth imply that it is a good alternative to the types of post currently used.

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“…This study contributes to the clinical application of dental CAD/CAM systems. Gloria et al used finite element (FE) analysis to research endodontic post material and design, which can reduce stress concentration and get better restoration effect. Blanz et al and Mehl et al constructed an average tooth based on a large number of biogeneric teeth in the same tooth position, and measured the deviation between the biogenetic teeth and the average tooth.…”

Section: Introductionmentioning

confidence: 99%

Personalized design technique for the dental occlusal surface based on conditional generative adversarial networks

Dai

Tian

Zhang

et al. 2020

Numer Methods Biomed Eng

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The tooth defect is a frequently occurring disease within the field of dental clinic. However, the traditional manual restoration for the defective tooth needs an especially long treatment time, and dental computer aided design and manufacture (CAD/CAM) systems fail to restore the personalized anatomical features of natural teeth. Aiming to address the shortcomings of existed methods, this article proposes an intelligent network model for designing tooth crown surface based on conditional generative adversarial networks. Then, the data set for training the network model is constructed via generating depth maps of 3D tooth models scanned by the intraoral. Through adversarial training, the network model is able to generate tooth occlusal surface under the constraint of the space occlusal relationship, the perceptual loss, and occlusal groove filter loss. Finally, we carry out the assessment experiments for the quality of the occlusal surface and the occlusal relationship with the opposing tooth. The experimental results demonstrate that our method can automatically reconstruct the personalized anatomical features on occlusal surface and shorten the treatment time while restoring the full functionality of the defective tooth. K E Y W O R D S conditional generative adversarial networks, occlusal relationship, occlusal surface reconstruction, perceptual loss Fulai Yuan, Ning Dai, and Sukun Tian contributed equally to this study.

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FE analysis of conceptual hybrid composite endodontic post designs in anterior teeth

Abstract: The FE analysis confirmed the ability of the functionally graded post to dissipate stress from the coronal to the apical end. Hence actual (physical) C-G/PEI posts could permit optimization of stress distributions in endodontically treated anterior teeth.

Cited by 39 publications

References 44 publications

Biomechanical performance of an immature maxillary central incisor after revitalization: a finite element analysis

Biomechanical performance of an immature maxillary central incisor after revitalization: a finite element analysis

Root canal reconstruction using biological dentin posts: A 3D finite element analysis

Personalized design technique for the dental occlusal surface based on conditional generative adversarial networks

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