Biomechanical behavior of endodontically treated premolar teeth restored with novel endocrown system: 3D Finite Element and Weibull analyses

Shams, A; Sakrana, Amal Abdelsamad; El-Farag, Shaimaa Ahmed Abo; Elerian, Fatma Abdallah; Özcan, Mutlu

doi:10.1016/j.jmbbm.2021.104853

Cited by 11 publications

(13 citation statements)

References 36 publications

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“…This study was approved by the Ethical Committee, Faculty of Dentistry, Mansoura University (Code: A05100221). To avoid dehydration, all teeth were stored in distilled water at room temperature through all testing period [ 40 ].…”

Section: Methodsmentioning

confidence: 99%

“…Using a chewing simulation unit (Chewing Simulator CS-4.4; SD Mechatronik), specimens were subjected to 240,000 cycles (frequency = 1.6 Hz) to simulate a unidirectional vertical force of 50 N [ 43 ]. The load was applied vertically parallel to the long axes of the teeth with a 6 mm ball-shaped antagonist in the center of the occlusal surfaces contacting the buccal and palatal cusps of each specimen [ 40 ].…”

Section: Methodsmentioning

confidence: 99%

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Fracture resistance of monolithic translucent zirconia crown bonded with different self-adhesive resin cement: influence of MDP-containing zirconia primer after aging

Tyor,

Al-Zordk,

Sakrana

2023

BMC Oral Health

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Objectives Successful ceramic restorations depend on the strong bonding with resin cement and even stress distribution. The aim of this study was to evaluate the impact of adding MDP-containing zirconia primer before self-adhesive resin cements with different functional acidic monomers on fracture resistance of monolithic zirconia crown. Materials and methods Eighty defect-free human maxillary premolars were divided according to the cement type and application of MDP-containing zirconia primer into eight groups (n = 10): Calibra Universal (C), Calibra Universal combined with zirconia primer (CZ), RelyX U200 (R), RelyXU200 combined with zirconia primer (RZ), Panavia SA Cement Plus (P), Panavia SA Cement Plus combined with zirconia primer (PZ), Multilink Speed (M), and Multilink Speed combined with zirconia primer (MZ). After teeth preparation and fabrication of zirconia crowns, each crown was bonded to its corresponding tooth. All specimens were subjected to 10,000 thermocycles between 5 and 55°C, followed by cyclic load (50 N) for 240,000 cycles. Each specimen was subjected to a static axial load until fracture using universal testing machine and the fracture load was recorded. The fracture mode studied and recorded. The fracture load results were analyzed using two-way ANOVA test (α = 0.05). Results A significant interaction (P = 0.038) of combining MDP-containing zirconia primer and cement type on fracture resistance of monolithic zirconia crown was detected. The mean fracture load values of zirconia crown were significantly influenced by the combined application of the MDP-containing zirconia primer with Calibra Universal (P = 0.01), RelyX U200 (P < 0.001), and Multilink Speed (P = 0.038), while there was no significant difference with Panavia SA Cement Plus (P = 0.660). There was significant difference (F = 20.69, P < 0.001) between the mean fracture loads of groups with self-adhesive cements (C, R, P, and M groups). The highest fracture load was recorded with RZ group (2446.90 ± 126.72 N) while the lowest fracture load was recorded with C group (1623.18 ± 149.86 N). Conclusions The self-adhesive resin cement with different acidic functional monomer affects the fracture resistance of monolithic zirconia crown. Application of MDP-containing primer could improve the fracture resistance of monolithic zirconia crown with most self-adhesive cements. The application of an MDP-containing primer had no impact on the fracture resistance of monolithic translucent zirconia crown bonded by MDP-containing self-adhesive resin cement.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Fracture resistance of monolithic translucent zirconia crown bonded with different self-adhesive resin cement: influence of MDP-containing zirconia primer after aging

Tyor,

Al-Zordk,

Sakrana

2023

BMC Oral Health

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“…Finally, the selected teeth were disinfected with 1:10 diluted sodium hypochlorite (5.25%) [35]. To avoid dehydration, the teeth were kept in distilled water at room temperature during the testing period.…”

Section: In Vitro Studymentioning

confidence: 99%

“…Young's modulus is a constant of the capacity of a material to resist changes in length under tensile or compression, whereas Poisson's ratio is the deformation of a material in directions perpendicular to the direction of loading [43]. All interfaces were considered perfectly bonded, and the model structures were assumed to be linearly elastic, isotropic, and homogenous for simplification and to reduce the processing time [44]. In the present study, Young's modulus used for the FRC group is considered an isotropic behavior with constant and proportional deformation in all directions of the material.…”

Section: Finite-element Analysismentioning

confidence: 99%

“…According to the parameters used for the in vitro analysis and the resultant failure loads for the tested groups, the load cell of force was adjusted at about 505 N for model D1Z, 345 N for model D1F, 548 N for model D2Z, and 375.10 N for model D2F. A spherical solid, rigid, and material with a diameter of 5 mm was used as an antagonist to apply a compressive load (speed of 0.5 mm/min) until fracture or visible plastic deformation occurred [44,46]. The modified von Mises (mvM) stress was selected as an analysis criterion since it can be used to evaluate the strength of materials under complex stresses [32].…”

Section: Finite-element Analysismentioning

confidence: 99%

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Biomechanical behavior of posterior metal-free cantilever fixed dental prostheses: effect of material and retainer design

et al. 2022

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Objective To study the fracture resistance and stress distribution pattern of translucent zirconia and fiber-reinforced composite cantilever resin-bonded fixed dental prostheses (RPFDPs) with two retainer designs. Materials and methods Forty human mandibular molars were divided into two groups according to the retainer design. The restorations included a premolar pontic and 2 retainer designs: (D1) inlay ring retainer and (D2) lingual coverage retainer. Each main group was then divided according to the material used (n = 10): zirconia (Z) or fiber-reinforced composite (FRC) (F). Restorations were cemented using dual polymerizing adhesive luting resin. All specimens were thermo-cycled (5–55 °C for 10,000 cycles), then subjected to dynamic loading (50 N, 240,000, and 1.6 Hz) and fracture resistance test. The finite element analysis includes the two models of retainer designs used in the in vitro test. Modified von Mises stress values on enamel, dentin, luting resin, and restorations were examined when the restorations failed. Results A significantly higher failure load was recorded for zirconia groups (505.00 ± 61.50 and 548.00 ± 75.63 N for D1Z and D2Z, respectively) than for FRC groups (345.00 ± 42.33 and 375.10 ± 53.62 N for D1F and D2F, respectively) (P = 0.001). With regard to failure mode, D2 showed a more favorable failure pattern than D1. Model D2 resulted in lower stresses in tooth structure than model D1, and zirconia transmitted more stresses to the tooth structure than FRC. Conclusions The lingual coverage retainer (D2) enhanced the biomechanical performance of the restoration/tooth complex. Considering the failure mode and tooth stress, FRC is a promising treatment option when constructing a cantilever RPFDP. Clinical relevance Dentists should be aware of the biomechanical behavior during the selection of the material and for the replacement of a single missing mandibular premolar tooth with minimally invasive RBFDP.

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Rehabilitation of severely-destructed endodontically treated premolar teeth with novel endocrown system: Biomechanical behavior assessment through 3D finite element and in vitro analyses

Shams

Elsherbini

Elsherbiny

et al. 2022

Journal of the Mechanical Behavior of Biomedical Materials

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Biomechanical behavior of endodontically treated premolar teeth restored with novel endocrown system: 3D Finite Element and Weibull analyses

Cited by 11 publications

References 36 publications

Fracture resistance of monolithic translucent zirconia crown bonded with different self-adhesive resin cement: influence of MDP-containing zirconia primer after aging

Fracture resistance of monolithic translucent zirconia crown bonded with different self-adhesive resin cement: influence of MDP-containing zirconia primer after aging

Biomechanical behavior of posterior metal-free cantilever fixed dental prostheses: effect of material and retainer design

Rehabilitation of severely-destructed endodontically treated premolar teeth with novel endocrown system: Biomechanical behavior assessment through 3D finite element and in vitro analyses

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