Endocrown restorations: Influence of dental remnant and restorative material on stress distribution

Tribst, João Paulo Mendes; Madruga, Camila Ferreira Leite; Valera, Márcia Carneiro; Bresciani, Eduardo; Melo, Renata Marques de

doi:10.1016/j.dental.2018.06.012

Cited by 73 publications

(81 citation statements)

References 30 publications

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“…The available literature has reported that molars restored with endocrowns had good clinical performance and they showed higher fracture resistance than molars restored with fiber post and conventional crowns . Some studies discussed the effect of different preparation shapes on the success of endocrown restorations like ferrule height or pulp chamber extension . Other studies discussed the effect of the materials factor: ceramic‐based or resin‐based .…”

Section: Introductionmentioning

confidence: 99%

“…19 In comparison with the traditional treatment, all ceramic endocrowns have the advantages of good mechanical properties, high biocompatibility, good esthetics, preservation of the remaining tooth structure, and saving time. 10,[20][21][22] The available literature has reported that molars restored with endocrowns had good clinical performance [23][24][25][26][27][28] and they showed higher fracture resistance than molars restored with fiber post and conventional crowns. 14,29,30 Some studies discussed the effect of different preparation shapes on the success of endocrown restorations like ferrule height 25,31 or pulp chamber extension.…”

Section: Introductionmentioning

confidence: 99%

“…14,29,30 Some studies discussed the effect of different preparation shapes on the success of endocrown restorations like ferrule height 25,31 or pulp chamber extension. 26,28,32 Other studies discussed the effect of the materials factor: ceramic-based or resinbased. 11,21,24,33 The influence of materials on the performance of endocrowns is a principal factor.…”

Section: Introductionmentioning

confidence: 99%

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Fracture resistance and failure modes of endocrowns manufactured with different CAD/CAM materials under axial and lateral loading

Ghoul

Özcan

Silwadi

et al. 2019

J Esthet Restor Dent

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Objectives The purpose of this in vitro study was to evaluate the fracture resistance and failure modes of endocrowns made of three computer‐aided design/computer‐aided manufacturing (CAD/CAM) materials subjected to thermo‐mechanical cycling loading. Materials and Methods Eighty mandibular molars were divided into four groups (n = 20): one (C E) was restored with lithium disilicate glass‐ceramic conventional crowns, three were restored with endocrowns made of three different CAD/CAM materials; (E E) lithium disilicate glass‐ceramic, (E V) zirconia‐reinforced lithium silicate glass‐ceramic, and (E C) resin nano‐ceramic. After cycling loading, half of the samples from each group were loaded axially and the other half was loaded laterally. Fracture resistance was recorded in Newton (N) and failure modes were classified. Two‐way ANOVA, Bonferroni post hoc (α = .05), Chi‐square, and multiple logistic regression tests were used to analyze data. Results Statistically significant interaction were recorded between fracture resistance (N) and loading (P < .001), and groups (conventuional crown and endocrowns; P < .001). Endocrowns presented higher fracture strength than conventional crowns. Fracture resistance was significantly larger under axial loading. The numbers of irreparable failures were extremely important in the endocrowns groups (Groups E E, E V, E C), and only conventional crowns (Group C E) showed almost no irreparable failures under axial loading. Conclusion Lithium disilicate glass‐ceramic recorded the highest fracture resistance under axial and lateral loading. Clinical Significance The number of irreparable failures with all endocrown materials tested do not suggest yet the use of this type of restorations in posterior teeth.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fracture resistance and failure modes of endocrowns manufactured with different CAD/CAM materials under axial and lateral loading

Ghoul

Özcan

Silwadi

et al. 2019

J Esthet Restor Dent

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“…Some studies discussed the effect of preparation designs on the performance of endocrown. Tribst et al [16] showed in nite element analysis (FEA) study that the stress is more concentrated on the restoration more than the cement line, if the remaining dental tissue is bigger and if the material has high elastic modulus. Dejak et al [17] compared equivalent stresses in molars restored with endocrowns as well as posts and cores during masticatory simulation using FEA and found the tensile stresses achieved were 4 times higher values than under endocrowns.…”

Section: Introductionmentioning

confidence: 99%

Effect of different restorative crown design and materials on stress distribution in endodontically treated molars: A finite element analysis study

Lin

Zheng

2020

Preprint

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Background The purposes of this simulation study were to evaluate the stresses in the roots of endodontically treated molars with extensive coronal tissue loss which were restored by endocrowns (all-in-one core and crown) and traditional crowns with post-cores, during masticatory simulation using finite element analysis. Methods A mesio-distal cross-section of a lower right first molar was digitized and used to create 2-dimensional models of the teeth and supporting tissue; different crown designs, viz ., endocrown with 2 mm occlusal clearance, endocrown with 4 mm occlusal clearance and post-core crown; different crown materials, viz ., zirconia (Zr) and lithia-disilicate reinforced glass ceramic (LDRGC), and different post and core materials, viz. , glass fiber (GF), stainless steel (SS) and metal cast (MC). An axial load of 600 N was applied to the central fossa of occlusal surface. Results The stress distributions were similar between Zr and LDRGC for periodontal ligament and alveolar bone. The root canal inner wall maximum principal stresses of SS post (70.8 MPa) and MC post (71.4 MPa) were higher than that of GF post (36.0 MPa) and endocrown (2.4 MPa). Conclusion The endocrowns reduced stress concentration for the root canal inner wall in comparison with the conventional post-core crown. Molars restored with endocrowns are less prone to root fracture than those with posts.

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“…The incorporation of crystalline particles inside glasses matrices enables dental ceramics to reach high fracture resistance due to smaller crack propagations without compromising the final aesthetics (1). Among the main ceramics used in dentistry, lithium disilicate ceramics are noteworthy for their extensive indication: veneers, inlays, onlays (1), monolithic crowns (1,2), copings, fixed prostheses (1), hybrid abutments (3) and endocrowns (4). Another ceramic with a similar function is zirconia reinforced lithium silicate, possessing reinforcement crystals in the monosilicate phase instead of disilicate.…”

Section: Introductionmentioning

confidence: 99%

Reinforced Glass-ceramics: Parametric Inspection of Three-Dimensional Wear and Volumetric Loss after Chewing Simulation

et al. 2019

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The aim of this study was to investigate the three-dimensional wear, volumetric loss and surface roughness after chewing simulation of two glass ceramics. Lithium disilicate (LD, Emax CAD, Ivoclar) and Zirconia reinforced lithium silicate (ZLS, Vita Suprinity, Vita Zhanfabrick) discs (n=20/g) were scanned to obtain stereolithography (STL) files for each sample. All discs were submitted to chewing simulation with sliding configuration (30 N, 300,000 cycles, 6 mm and 1.7 Hz) with steatite as antagonist. The samples were then scanned again and the volume loss and the deepest defect depth was measured using the superimposed file from the baseline using three-dimensional digital parametric inspection software (GOM Inspect, Braunschweig, Germany). Surface roughness (Ra and Rz) was analyzed with a contact profilometer. Data were analyzed by one-way ANOVA and Tukey test (α=0.5%). ANOVA showed significant differences among the groups. Considering the ceramic volume loss, wear depth defect length and Rz roughness, LD (-22.09±5.57%; 0.80±0.06 µm; 3.08±1.02 µm) showed higher mean values than ZLS (-15.67±4.51%; 0.56±0.09 µm; 1.51±0.90 µm). Ra mean values were similar for both materials (p=0.064). All discs exhibited slight surface scratches along with the sliding direction with pitted wear patterns, while large cracks were observed on wear traces. These same areas can be identified in blue, overlapping the STL files before and after chewing simulation in inspection software. The linear reduction generated by sliding contact shows a graph with a similar wear pattern shape. ZLS was more resistant to wear than LD, with less volume loss and shallower surface defects.

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Endocrown restorations: Influence of dental remnant and restorative material on stress distribution

Cited by 73 publications

References 30 publications

Fracture resistance and failure modes of endocrowns manufactured with different CAD/CAM materials under axial and lateral loading

Fracture resistance and failure modes of endocrowns manufactured with different CAD/CAM materials under axial and lateral loading

Effect of different restorative crown design and materials on stress distribution in endodontically treated molars: A finite element analysis study

Reinforced Glass-ceramics: Parametric Inspection of Three-Dimensional Wear and Volumetric Loss after Chewing Simulation

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