Biomechanical behavior of endocrown restorations with different cavity design and CAD-CAM materials under a static and vertical load: A finite element analysis

Abtahi, Sara; Alikhasi, Marzieh; Siadat, Hakimeh

doi:10.1016/j.prosdent.2021.11.027

Cited by 11 publications

(11 citation statements)

References 28 publications

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“…Maximum principal stress levels were higher in VS with a higher elastic modulus than in resin matrix ceramics (23,24). We observed that resin-matrix ceramics (CS and SB) with more elastic modulus properties had a lower risk of fracture compared to VS material.…”

Section: Discussionmentioning

confidence: 69%

The effect of occlusal reduction and different CAD-CAM materials on stress distribution in endocrown restorations: A three-dimensional finite element analysis

et al. 2022

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Aim: The aim of this study was to examine the effects of different preparation types and restorative materials on the endocrown restoration applied to endodontically treated maxillary first molar and the stress distribution on the related tissues. Methodology: A 3-dimensional (3D) image of a previously extracted intact tooth was obtained with CBCT. The resulting .dicom files were imported into the Mimics. Enamel, dentine and pulp were separated and extracted as an STL file. 4 different groups were determined and prepared in SolidWorks. The 3D images were imported into the relevant finite element analysis software (ABAQUS), and a load of 600 N was applied at the occlusal area of each model in the axial direction. Models are divided into 3 groups according to material type: Vita Suprinity (VS; VITA Zahnfabrik), Cerasmart (CS; GC Corp.), and Shofu Block HC (SB; Shofu). There is also a type of cement is used: RelyX ARC (3M ESPE). Results: Regardless of the results, any stresses on any tissue or restoration were not above the strength limits. In models with cusp preparation, the stress on the dental tissues was lower. In addition, higher stress was generally observed in groups where the lingual area was healthy. On the other hand, the stress occurring in zirconia-reinforced glass ceramics (VS) is higher compared to ceramic materials with a resin matrix (CS, SB). It has been determined that the stress transmitted to the supporting tissues is lower. Conclusion: As a result, endocrown restorations can be used in the restoration of endodontically treated first molars. In addition, when endocrown restoration is applied to molars with only one healthy area and excessive loss of coronal structure, reducing the cusp will be beneficial in terms of the distribution of stress on the healthy tissues.

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Section: Discussionmentioning

confidence: 69%

The effect of occlusal reduction and different CAD-CAM materials on stress distribution in endocrown restorations: A three-dimensional finite element analysis

et al. 2022

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“…Using the contact deformation mechanism of the tooth-restoration system approximates the nature of the deformation to real life cases. To date, studies on numerical analysis of the deformation of the tooth with restorations of the biomechanical system have shown that contact bonding has little effect, which does not allow for a reliable assessment of the deformation features of the biomechanical unit [ 19 , 23 ]. In the present paper, it was established that Herculite XRV is the most suitable material for deep wedging.…”

Section: Discussionmentioning

confidence: 99%

“…Finite element analysis (FEM) tools are well suited for this purpose. FEM has become firmly established in the medical practice of solving dental problems [ 19 , 20 , 21 , 22 , 23 ]. FEM also makes it possible to evaluate the effectiveness of different treatment tactics and material choices at the treatment planning stage [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Mechanical Behaviour of Wedge-Shaped Defect Filling Materials

et al. 2022

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This paper deals with direct restorations of teeth with non-carious cervical lesions (NCCL). NCCL defects are capable of gradual growth and are accompanied by the degradation of the surrounding tissue. Direct restorative treatment, in which the cavity is filled with a cementing agent, is considered to be an accessible and common treatment option. The study included simulations of the teeth without lesions, the teeth with V and U lesions and the tooth-restorative system. Parameterised numerical tooth models were constructed. Two cases with defect depths of 0.8 mm and ~1.7 mm and three variants with fillet radii of the defect end of 0.1, 0.2 and 0.3 mm were considered. The effect of two biomaterials for restorations was studied, namely Herculite XRV (Kerr Corp, Orange, CA, USA) and Charisma (Heraeus Kulzer GmbH, Hanau, Germany). The models were deformed with a vertical load of 100 to 1000 N from the antagonist tooth. The tooth-restorative system was considered, taking into consideration the contact interaction in the interface areas with the tooth tissues. Within the limits of the research, the character of the distribution of the deformation characteristics and their dependence on the level of loading, the depth of the defect and the radius of the curvature of the “wedge” were established.

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“…Comparable survival and success rates for endocrowns and conventional post‐retained crown restorations were shown (Al‐Dabbagh, 2021 ), indicating that endocrowns are a reliable treatment option for compromised root filled molars and premolars. Recommendations for the preparation design include a depth of 3 mm for the central retention cavity with a divergence angle of 6–12° for more homogenous stress distribution (Abtahi et al, 2022 ; Tribst et al, 2021 ). The cervical margin width should be at least 2 mm, and prepared flat or slightly bevelled (Zheng et al, 2022 ).…”

Section: Endocrownsmentioning

confidence: 99%

Present status and future directions: The restoration of root filled teeth

et al. 2022

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This narrative review will focus on a number of contemporary considerations relating to the restoration of root filled teeth and future directions for research. Clinicians are now more than ever, aware of the interdependence of the endodontic and restorative aspects of managing root filled teeth, and how these aspects of treatment are fundamental to obtaining the best long-term survival. To obtain the optimal outcomes for patients, clinicians carrying out endodontic treatment should have a vested interest in the restorative phase of the treatment process, as well as an appreciation for the structural and biomechanical effects of endodontic-restorative procedures on restoration and tooth longevity. Furthermore, the currently available research, largely lacks appreciation of occlusal factors in the longevity of root filled teeth, despite surrogate outcomes demonstrating the considerable influence this variable has.Controversies regarding the clinical relevance of minimally invasive endodontic and restorative concepts are largely unanswered with respect to clinical data, and it is therefore, all too easy to dismiss these ideas due to the lack of scientific evidence.However, conceptually, minimally invasive endodontic-restorative philosophies appear to be valid, and therefore, in the pursuit of improved clinical outcomes, it is important that the efficacies of these treatment protocols are determined. Alongside an increased awareness of the preservation of tooth structure, developments in adhesive bonding, ceramic materials and the inevitable integration of digital dentistry, there is also a need to evaluate the efficacy of new treatment philosophies and techniques with well-designed prospective clinical studies.

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Biomechanical behavior of endocrown restorations with different cavity design and CAD-CAM materials under a static and vertical load: A finite element analysis

Cited by 11 publications

References 28 publications

The effect of occlusal reduction and different CAD-CAM materials on stress distribution in endocrown restorations: A three-dimensional finite element analysis

The effect of occlusal reduction and different CAD-CAM materials on stress distribution in endocrown restorations: A three-dimensional finite element analysis

Numerical Study of the Mechanical Behaviour of Wedge-Shaped Defect Filling Materials

Present status and future directions: The restoration of root filled teeth

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