Assessment of Mineral Trioxide Aggregate Setting in Simulated Root Canal with Different Root Canal Wall Thickness: In Vitro Study
| Autor: | Jan Tomastik, Jiří Šedý, David Marinčák, Ondřej Vencálek, Kamila Fačevicová, Radovan Žižka, Radim Ctvrtlik |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Mineral trioxide aggregate
mineral trioxide aggregate bioceramic cement setting dentin microhardness modulus of elasticity nanoindentation Materials science Root canal Young's modulus 01 natural sciences Indentation hardness lcsh:Technology lcsh:Chemistry 010104 statistics & probability 03 medical and health sciences symbols.namesake 0302 clinical medicine medicine Dentin General Materials Science 0101 mathematics Apical foramen Composite material Instrumentation lcsh:QH301-705.5 Fluid Flow and Transfer Processes lcsh:T Process Chemistry and Technology General Engineering 030206 dentistry Nanoindentation lcsh:QC1-999 Computer Science Applications medicine.anatomical_structure lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 symbols lcsh:Engineering (General). Civil engineering (General) Layer (electronics) lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 11, Iss 1727, p 1727 (2021) Applied Sciences; Volume 11; Issue 4; Pages: 1727 |
| ISSN: | 2076-3417 |
| Popis: | Setting of mineral trioxide aggregate (MTA) is affected by various factors. The purpose of this in vitro study was to evaluate the influence of root canal wall thickness on mechanical properties of MTA along the whole apical plug. Bovine bone mold tubes with internal diameter of 2 mm, height of 5 mm, and wall thickness of 0.8 mm, 1.2 mm, and 1.6 mm were filled with 3 mm ProRoot MTA and were kept in 37 °C and relative humidity of 100% for 7 days. The indentation hardness and reduced modulus of elasticity were measured in a large overview matrix and detailed matrix placed 1.5 mm from simulated apical foramen in order to obtain particularized information about gradient of altering mechanical properties. The uppermost layer of material in contact with simulated apical foramen had reduced mechanical properties irrespective of root canal wall thickness. The most distinct decrease of microhardness (32%) and reduced modulus of elasticity (27%) in interfacial layer were present in specimen with thinnest root canal wall. This effect could be observed in detailed measurement up to 190 µm in material. The interfacial layer of MTA, which was in contact during setting with root canal wall thinner than 1.2 mm, had reduced mechanical properties. |
| Databáze: | OpenAIRE |
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