The effect of aging on the fracture resistance of different types of screw-cement-retained implant-supported zirconia-based restorations

Sahebi, Safoora; Giti, Rashin; Sherafati, Arian

doi:10.1371/journal.pone.0270527

Cited by 6 publications

(7 citation statements)

References 35 publications

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“…4 Second, its effect on occlusion, the screw retained prostheses have some drawbacks, such as the necessity for optimal implant location. 11,12 Furthermore, the holding screw appears to be more susceptible to lateral bending, tipping, and elongation stresses, which could lead to screw loosening or screw fracture. Cement-retained restorations can be employed to minimize such drawbacks while also broadening the material spectrum to incorporate more restorative materials, such as all-ceramic materials.…”

Section: Discussionmentioning

confidence: 99%

“…Fracture of veneering porcelain occurs frequently. 11 Zhang et al, revealed that the material and geometric features of MZ ceramics, as well as the elimination of the interface between layered materials and zirconia frameworks, could potentially enhance restoration performance. 15 The digital cutback in the monolithic zirconia allows for some translucency in the restorations.…”

Section: Discussionmentioning

confidence: 99%

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Prototype importance for implant supported zirconia bridges: a case report

Qamheya,

Ghanem,

Wahbeh

et al. 2024

JDHODT

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Biocompatible esthetic restorations are necessary in order to obtain successful results with implant therapy. Monolithic zirconia is a more recently offered option to PFM and zirconia-ceramic prosthesis. The optical properties of zirconia have been greatly enhanced, approaching those of ceramics, while the monolithic nature of the prosthesis reduces the chance of fracture or chipping and improves its structural properties. The major drawback of theses zirconia is mechanical and thermal problems that encountered when zirconia is exposed to hydrothermal aging due to the transformation of the metastable tetragonal zirconia into the monoclinic form. This case report describes 45 aged adult female patient with anterior maxillary mobile teeth, after clinical and radiographical examination, extraction and socket preservation were done at periodontal department, 6 months later implant installed and after 3 months of healing, the patient referred to prosthodontic department. Screw retained temporary prosthesis were fabricated, composite build up were done intraorally for the temporary prosthesis to achieve the esthetic and functional occlusion. Cement retained implant supported fixed prosthesis using monolithic zirconia were cemented and no occlusal adjustment is needed thanks to the adjusted temporary prosthesis which served as prototype for a zirconia bridge with functional occlusion.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Prototype importance for implant supported zirconia bridges: a case report

Qamheya,

Ghanem,

Wahbeh

et al. 2024

JDHODT

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“…21 Furthermore, some studies have shown that thermocycling or mechanical aging of the crowns will decrease the fracture resistance of the crowns and could accelerate the damage of ceramic materials. 22,23 In this study, all specimens were thermo-cycled for 1000 cycles between 5 and 55 c before testing, a clinical condition that has been adopted by many studies. 14,24 Around 70% of the crystalline phase in LDGC is incorporated into the glassy matrix.…”

Section: Discussionmentioning

confidence: 99%

Influence of Different Thicknesses of Monolithic Crowns Made from Different Resin-Bonded Glass Ceramic on Their Load-bearing Capacity (An in vitro Comparative Study)

Abdalla,

Al-Zahawi

2023

SDJ

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Objective: To investigate the load-bearing capacity of the full-coverage crowns made from lithium disilicate glass-ceramic LDGC (IPS e.max®, Ivoclar Vivadent) and 10% zirconia reinforced lithium silicate glass ceramic ZLS (Dentsply DeTrey) with different thicknesses. Methods: Forty resin dies with supporting bases were duplicated from two prepared typodont teeth for all-ceramic crowns as a maxillary first molar. Forty crowns corresponding to each die were prepared and then they were divided into four groups: Group I (n 10) made from ZLS with a restoration thickness of (1.0 mm occlusally and 1.0 mm radially) and Group II (n 10) made from LDGC with a restoration thickness of (1.0 mm occlusally and 1.0 mm radially), and Group III (n 10) made from ZLS (1.5 mm occlusally and 1.5mm radially) and Group IV (n 10) made from LDGC (1.5 mm occlusally and 1.5 radially). All crowns were fabricated by chair side CEREC CAD/CAM and crystallized with Speed fire Dentsply Furness. The virolink resin cement (VariolinkII, Ivoclar Vivadent) was used to bond the crowns to the corresponding dies. All samples were thermo-cycled (10000 cycles between 5c and 55c) and tested for fracture resistance using a Universal testing machine at 0.5 mm/minute speed until failure. ANOVA and Tukey HSD test were used to compare the fracture resistance between groups. Results: The result demonstrates that the fracture resistance means and SD of ZLS with different thicknesses ranged from 572 N ± 122.002 to 1171±217.432 N, and those of LDGC with different thicknesses ranged from 625 N ±151.676 N to 845 N ±388.222 N. Conclusions: The fracture resistance increased with increasing crown thickness using different glass-ceramic materials.

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“…All the access holes were filled with polytetrafluoroethylene film (Teflon tape) up to 2 mm apical to the occlusal plane as measured with a periodontal probe. After that, a bulk of composite resin (Esthet-X HD; Dentsply Sirona, USA) was placed, shaped, and light-cured for 40 seconds on the orifice to fill the screw access hole to the level of the occlusal plan ( Fig 3 ) [ 32 ]. The procedures were all performed by a single skilled dental technician.…”

Section: Methodsmentioning

confidence: 99%

“…Perpendicular compressive force to the central fossa of crowns was chosen for the fracture test as it simulated the most common force clinically applied to these teeth [ 34 ]. A compressive load was applied at a crosshead speed of 0.5 mm/min by a Universal Testing Machine (Shimadzu Autograph AG-50kNE, Shimadzu Co., Ltd, Japan) [ 32 ] ( Fig 4 ).…”

Section: Methodsmentioning

confidence: 99%

Implant angulation and fracture resistance of one-piece screw-retained hybrid monolithic zirconia ceramic restorations

2023

Self Cite

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Objective This study aimed to investigate the fracture resistance of one-piece screw-retained hybrid monolithic zirconia ceramic restorations in different implant angulations. Materials and methods Three implant fixtures were embedded in acrylic resin blocks with 0°, 15°, and 25° angulations. For each group of implant angulations, 11 screw-retained one-piece monolithic zirconia restorations were made and bonded to the titanium inserts with a dual-cure self-adhesive resin. The complexes were screwed to the implant fixtures with titanium screws. The samples were thermocycled, subjected to compressive load, and fracture modes were recorded. One-way ANOVA and post hoc Tukey’s test were used for statistical analyses (α = 0.05). Results One-way ANOVA showed the fracture resistance to be significanltly different among the study groups (P = 0.036). The 15° group was significantly more resistant than 0° (P = 0.031). However, the 25° group was not significantly different from the 15° (P = 0.203) and 0° groups (P = 0.624). Fractures occurred only on the restorations, not at the screw levels. Conclusions Tilting the implant up to 15° improves the fracture resistance of one-piece screw-retained hybrid monolithic zirconia restorations; however, increasing the tilt to 25° would not yield restorations with significantly better fracture strength than the straight implants. Accordingly, when angulated implants are indicated in the esthetic zones, one-piece screw-retained hybrid monolithic zirconia ceramic restorations can be used with acceptable fracture strength.

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The effect of aging on the fracture resistance of different types of screw-cement-retained implant-supported zirconia-based restorations

Cited by 6 publications

References 35 publications

Prototype importance for implant supported zirconia bridges: a case report

Prototype importance for implant supported zirconia bridges: a case report

Influence of Different Thicknesses of Monolithic Crowns Made from Different Resin-Bonded Glass Ceramic on Their Load-bearing Capacity (An in vitro Comparative Study)

Implant angulation and fracture resistance of one-piece screw-retained hybrid monolithic zirconia ceramic restorations

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