A novel approach for a complete 3D tooth reconstruction using only 3D crown data

Martorelli, Massimo; Ausiello, Pietro

doi:10.1007/s12008-012-0166-8

Cited by 32 publications

(24 citation statements)

References 10 publications

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“…Then, following the Bio-CAD technique [44], an intact tooth was designed. The root, pulp, and dentin morphology were estimated based on common tooth anatomy [45,46]. An endodontic treatment (crowndown technique with 4% conicity, 25% tapering), a large class II mesio-occluso-distal) (MOD) cavity with 2 ± 0.5 mm thickness of remaining wall, and a composite resin build-up were generated in order to simulate a clinical condition of tooth structure loss.…”

Section: Methodsmentioning

confidence: 99%

Mechanical Behavior of Different Restorative Materials and Onlay Preparation Designs in Endodontically Treated Molars

et al. 2021

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This study evaluated the effect of the combination of three different onlay preparation designs and two restorative materials on the stress distribution, using 3D-finite element analysis. Six models of first lower molars were created according to three preparation designs: non-retentive (nRET), traditional with occlusal isthmus reduction (IST), and traditional without occlusal isthmus reduction (wIST); and according to two restorative materials: lithium-disilicate (LD) and nanoceramic resin (NR). A 600 N axial load was applied at the central fossa. All solids were considered isotropic, homogeneous, and linearly elastic. A static linear analysis was performed, and the Maximum Principal Stress (MPS) criteria were used to evaluate the results and compare the stress in MPa on the restoration, cement layer, and tooth structure (enamel and dentin). A novel statistical approach was used for quantitative analysis of the finite element analysis results. On restoration and cement layer, nRET showed a more homogeneous stress distribution, while the highest stress peaks were calculated for LD onlays (restoration: 69–110; cement layer: 10.2–13.3). On the tooth structure, the material had more influence, with better results for LD (27–38). It can be concluded that nRET design showed the best mechanical behavior compared to IST and wIST, with LD being more advantageous for tooth structure and NR for the restoration and cement layer.

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Section: Methodsmentioning

confidence: 99%

Mechanical Behavior of Different Restorative Materials and Onlay Preparation Designs in Endodontically Treated Molars

et al. 2021

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“…Reverse engineering, theoretical, and experimental methodologies have been widely employed for the analysis of the stress distributions and mechanical behavior of restored teeth [ 9 , 10 , 11 , 12 , 15 , 16 , 17 , 18 ].…”

Section: Resultsmentioning

confidence: 99%

Stress Distributions for Hybrid Composite Endodontic Post Designs with and without a Ferrule: FEA Study

et al. 2020

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The aim of the current work was to analyze the influence of the ferrule effect for hybrid composite endodontic post designs consisting of carbon (C) and glass (G) fiber-reinforced polyetherimide (PEI), in upper canine teeth. Starting from theoretical designs of C-G/PEI hybrid composite posts with different Young’s moduli (Post A—57.7 GPa, Post B—31.6 GPa, Post C—graduated from 57.7 to 9.0 GPa in the coronal–apical direction) in endodontically treated anterior teeth, the influence of the ferrule effect was determined through finite element analysis (FEA). On the surface of the crown, a load of 50 N was applied at 45° to the longitudinal axis of the tooth. Maximum principal stresses were evaluated along the C-G/PEI post as well as at the interface between the surrounding tooth structure and the post. Maximum stress values were lower than those obtained for the corresponding models without a ferrule. The presence of a ferrule led to a marked decrease of stress and gradients especially for posts A and B. A less marked effect was globally found for Post C, except in a cervical margin section along a specific direction, where a significant decrease of the stress was probably due to local geometric features, compared to the model without a ferrule. The presence of a ferrule did not generally provide a marked benefit in the case of the graduated Post C, in comparison to other C-G/PEI posts. The outcomes suggest how such a hybrid composite post alone should be sufficient to optimize the stress distribution, dissipating stress from the coronal to the apical end.

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“…Dense correspondence between jaw samples is obtained using the 3D thin-plate spline where the alignment procedure is guided by the sparse set of anatomical jaw landmarks as shown 1 We used a Cone-beam CT (KODAK 9000 3D Extraoral) scanner.…”

Section: Data Preprocessingmentioning

confidence: 99%

“…Using 3D CAD models has great advantages over conventional physical solid models, as solid models require big physical space for storage, adding financial and logistic burdens which is not the case of CAD models that are stored electronically [1].…”

Section: Introductionmentioning

confidence: 99%

A 3D reconstruction of the human jaw from a single image

Abdelrahim

Shalaby

Elhabian

et al. 2013

2013 IEEE International Conference on Image Processing

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Accurate 3D modeling of the human teeth/jaw helps patients avoid the discomfort of the mold process, and improves the data accuracy for oral orthodontists and dental care personnel. Since the surface of the human tooth is almost textureless, Shape from Shading (SFS) has been successfully adopted in solving this problem. In this paper, we attempt to improve the limitations of previous 3D tooth reconstruction algorithms by developing a new approach for shape reconstruction from single image shading with Two-Dimensional Principle Component Analysis (2D-PCA) shape priors. The surface reflectance is modeled using Oren-Nayar-Wolff model which accounts for the retro-reflection case and we experimentally prove that the teeth surface follows the microfacet theory. Our formulation exploits the shape priors as extracted from a set of training CT scans of real human jaws. Our experiments provide promising quantitative metric results for the proposed approach. This work is fundamental for establishing an optical-based approach for reconstructing the human jaw that is inexpensive and does not use ionizing radiation.

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A novel approach for a complete 3D tooth reconstruction using only 3D crown data

Cited by 32 publications

References 10 publications

Mechanical Behavior of Different Restorative Materials and Onlay Preparation Designs in Endodontically Treated Molars

Mechanical Behavior of Different Restorative Materials and Onlay Preparation Designs in Endodontically Treated Molars

Stress Distributions for Hybrid Composite Endodontic Post Designs with and without a Ferrule: FEA Study

A 3D reconstruction of the human jaw from a single image

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