Effect of different storage media on the microhardness and wear resistance of resin‐matrix ceramics

Dayan, Çağatay; Mumcu, Emre

doi:10.1111/ijac.13307

Cited by 11 publications

(17 citation statements)

References 35 publications

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“…The alterations in temperature may lead to thermal stress and various modifications to dental hard tissues as well as the restorative materials as a result of different thermal expansion coefficients. Nelsen (22) reported that thermal characteristics of restorative materials could be examined by using thermocycling test method.…”

Section: Discussionmentioning

confidence: 99%

“…No significant difference was detected regarding interactions between wear and surface hardness for the materials (28). Dayan and Mumcu reported weak correlation between wear and microhardness of the restorative materials tested: Paradigm MZ100, 3M Espe, USA; Lava Ultimate, 3M Espe, USA; Vita Enamic, Vita Zahnfabric, Germany; Cerasmart, GC Corp., Japan (22). In the present study, supporting the results of Cao et al, (28) Dayan and Mumcu (22), no correlation was observed for composite block, hybrid block and resin composite groups (p≥0.05).…”

Section: A Relation Between Inorganic Filler Content and Hardness In Resin-based Composites (31)mentioning

confidence: 99%

“…The relation between the resistance to abrasion and microhardness was assessed for dental restorative materials in previous studies (1,22,28). CAD/CAM composite blocks were reported to have different mechanical properties due to their diversity in structural characteristics and filler percentages (33,34).…”

Section: A Relation Between Inorganic Filler Content and Hardness In Resin-based Composites (31)mentioning

confidence: 99%

“…The amount of wear was also reported to be related to the surface microhardness (21). Some researchers have found no correlation between hardness and wear resistance (18), whereas several researches have reported the presence of correlation between these mechanical properties (22,23).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Correlation Between Wear Resistance and Microhardness of Resin-based CAD/CAM Blocks

Bayraktar¹,

Türkmen²,

Atalı³

et al. 2020

ERD

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Aim: Evaluating the relation between wear resistance and microhardness of composite blocks, hybrid block, and resin composite to provide convenient argument for clinical application.Methods: A conventional resin composite (IPS Empress Direct, Ivoclar Vivadent, Liechtenstein), a hybrid ceramic block (Enamic, Vita, Germany), and composite blocks (Lava Ultimate, 3M, USA; Hc block, Shofu, Japan; Brilliant Crios, Coltene, Switzerland; Cerasmart, GC Corp., Japan) were investigated. Specimens (n=12 for each) were loaded in a chewing simulator (Dent Ar-Ge, Analitik Medical, Turkey) for thermal cycling (49 N force, 240.000 cycles, 1.5 mm lateral movement, 1.7 Hz frequency) and worn sufaces were scanned with Las-20 (Laser scanner, SD-Mechatronic, Germany), and Vickers microhardness (VHN) values were determined (200 grf/10 sec). Statistical analysis was performed using Spearman Correlation Coefficient, Kolmogorov-Smirnov, Mann-Whitney U, Friedman and Kruskal-Wallis tests (p<0.05).Results: Significant correlation was detected between microhardness and wear resistance for all composite Cad/Cam blocks (p<0.001), whereas no correlation was observed for hybrid block and resin composite material (p≥0.05). Vita Enamic showed the highest VHN value and wear resistance among all the materials (p<0.001). Conclusion:Within the limitations of this in vitro study, a significant correlation between microhardness and wear resistance was observed only for composite Cad/Cam blocks which varied among the brands used in this study.

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Section: Discussionmentioning

confidence: 99%

Section: A Relation Between Inorganic Filler Content and Hardness In Resin-based Composites (31)mentioning

confidence: 99%

Section: A Relation Between Inorganic Filler Content and Hardness In Resin-based Composites (31)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of Correlation Between Wear Resistance and Microhardness of Resin-based CAD/CAM Blocks

Bayraktar¹,

Türkmen²,

Atalı³

et al. 2020

ERD

View full text Add to dashboard Cite

show abstract

“…These failures may present themselves in the form of bulk fracture or chipping. The previously published literature indicates that the mechanical properties, such as fracture strength, 12 fracture toughness, 12 and microhardness, 12,17 of polymer‐based CAD/CAM restorative materials are affected by aging. Furthermore, it was stated that the thickness of CAD/CAM restorations was also effective on the fracture against chewing forces.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and repair bond strength of polymer‐based CAD/CAM restorative materials

Şişmanoğlu

Gürcan

Yıldırım-Bilmez

et al. 2020

Int J Applied Ceramic Tech

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Information on the mechanical properties and repairability of computer‐aided design/computer‐aided manufacturing (CAD/CAM) blocks is scarce. Five CAD/CAM blocks with similar indications were evaluated, including four resin nanoceramics, one polymer‐infiltrated ceramic network (PICN), and one feldspathic ceramic. CAD/CAM blocks were sectioned into 4 mm × 1.2 mm × 13 mm bars for flexural strength (FS), and 4 mm thick blocks were prepared for elastic modulus (EM), nanohardness (NH), and microshear bond strength (µSBS) testing. FS of the CAD/CAM blocks was determined using a three‐point bending test, whereas EM and NH values were measured using a nanoindenter. The reparability of the tested block materials was determined by the µSBS test. One‐way ANOVA was conducted for FS, EM, NH, and µSBS followed by Tukey's pairwise comparison (α < 0.05). FS ranged from 115 to 207 MPa, EM from 8.21 to 44 GPa, NH from 0.76 to 7.24, and µSBS from 24.9 to 30.6 MPa. The findings of the present study revealed that resin nanoceramic blocks exhibited higher FS values than PICN and feldspathic ceramic, and they have acceptable mechanical properties for the fabrication of single‐unit restorations according to the ISO 6872:2008. Furthermore, all CAD/CAM blocks tested can be successfully repaired regarding their recommended repair protocol.

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Compressive strength evaluation of thin occlusal veneers from different CAD/CAM materials, before and after acidic saliva exposure

et al. 2022

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In the present study are depicted valuable observations for practitioners, obtained from an in vitro study which aims to evaluate the compressive strength of occlusal veneers fabricated from 3 type of restorative materials, before and after 1 month of acidic artificial saliva exposure (pH = 2.939). In this context, 90 extracted human molars were prepared to receive computer-aided design/computer-aided manufacturing (CAD/CAM) occlusal veneers. The restorative materials considered in this study were: Cerasmart; Straumann Nice and Tetric CAD. The occlusal veneers were designed, milled and cemented with an adhesive dual-cure resin cement. From all the extracted human molars, only sixty specimens were immersed in acidic artificial saliva, for 1 month, at 37 °C ± 1 °C and part of this specimens were also thermo-cycled, between 5 and 55 °C ± 2 °C, before compressive strength test. The results showed a lower compressive strength for both the samples exposed to acidic artificial saliva as well as for the samples exposed to acidic artificial saliva and thermo-cycled. Scanning electron microscopy (SEM) showed that after compressive strength, all the specimens non-exposed to acidic artificial saliva, present extensive cracks formation at the surface of the restorations, and after exposure to acidic artificial saliva for 1 month, the surface damage was characterized by longitudinal and profound fractures of the restoration, as well as the fracture of the tooth structure. Between CAD/CAM materials tested, nanoceramic resin shows more favorable fracture patterns, both before and after acidic artificial saliva exposure.

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Effect of different storage media on the microhardness and wear resistance of resin‐matrix ceramics

Cited by 11 publications

References 35 publications

Evaluation of Correlation Between Wear Resistance and Microhardness of Resin-based CAD/CAM Blocks

Evaluation of Correlation Between Wear Resistance and Microhardness of Resin-based CAD/CAM Blocks

Mechanical properties and repair bond strength of polymer‐based CAD/CAM restorative materials

Compressive strength evaluation of thin occlusal veneers from different CAD/CAM materials, before and after acidic saliva exposure

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