Mechanical behaviors of enamel, dentin, and dental restorative materials by Three-point bending test

Chun, Keyoung Jin; Kim, Choong Yeon; Lee, Jong Yeop

doi:10.15761/docr.1000167

Cited by 1 publication

(1 citation statement)

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“…Flexural and compressive strength is particularly important in dental applications, as dental composites are often used to restore teeth that have been subjected to such stresses during normal chewing and biting. 29,30 The mechanical characteristics of the developed composites including flexural strength, flexural modulus, and compressive strength were assessed by using a Shimadzu™ Autograph AGJ-S (Japan) universal testing machine following ISO 4049 standard. 31 Five rectangular specimens with a length of 25 mm and a width and height of 2 mm for each material were prepared to be used in the threepoint bending test.…”

Section: Mechanical Testingmentioning

confidence: 99%

Development of resin‐based dental composites containing hydroxyapatite and zirconia nanoparticles

Tunca Taşkıran,

Tanoğlu,

Çerci

et al. 2024

Polymer Composites

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In clinical applications, resin‐based dental composites primarily face challenges with fractures and secondary caries. To overcome these issues, the physical characteristics of dental composites, especially mechanical properties, need to be improved. Hydroxyapatite (HA), present in the structure of the teeth, is preferred due to its biological properties, and zirconia (ZrO2) nanoparticles are known to enhance the mechanical properties of this type of composites. The aim of this study is to develop resin‐based dental composites containing HA and ZrO2 nanoparticles. The study also aims to explore the synergistic effect of these two nanoparticles on the physical properties of the developed composites. Composites with nine different compositions were prepared by mixing the components with the help of a mortar mill. The flexural and compressive strength, polymerization shrinkage, depth of cure and water sorption, and solubility properties of the prepared composites have been investigated. All composites have been found to meet the requirements of ISO 4049 standard. Among them, composite containing 5 wt. % HA and 1 wt. % ZrO2 (H5Z1) has exhibited the highest flexural strength with an increase of 58% compared to the control sample, and composite containing 3 wt. % HA and 2 wt. % ZrO2 (H3Z2) has exhibited the highest compressive strength with an increase of 22% compared to the control sample. Other physical properties of the composites have been found to be in an acceptable level.Highlights Dental composites with HA and ZrO2 fillers were developed by a mortar mill. Synergistic effect of HA and ZrO2 nanoparticles was investigated. Mechanical properties of dental composites were significantly improved. Physical properties of dental composites were found to be at acceptable levels. Depth of cure decreases with increasing HA and ZrO2 loading.

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Section: Mechanical Testingmentioning

confidence: 99%