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The Influences of Dehydration on the Mechanical Properties of Human Dentin

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Title: The Influences of Dehydration on the Mechanical Properties of Human Dentin
Authors: Chowdhury, Abu Faem Mohammad Almas Browse this author →KAKEN DB
Alam, Arefin Browse this author
Islam, Md Refat Readul Browse this author
Yamauti, Monica Browse this author
Alam, Mohammad Shafiqul Browse this author
Rahman, Mohammad Musfiqur Browse this author
Asad-Uz-Zaman Browse this author
Ahmed, Mohiuddin Browse this author
Alvarez-Lloret, Pedro Browse this author
Sano, Hidehiko Browse this author →KAKEN DB
Keywords: dentin
elastic modulus
ultimate tensile strength
Issue Date: 24-Mar-2021
Publisher: MDPI
Journal Title: Minerals
Volume: 11
Issue: 4
Start Page: 336
Publisher DOI: 10.3390/min11040336
Abstract: The complex, dynamic, and hydrated microstructures of human dentin serve as the major determinant for the restorative performance of biomaterials. This study aimed to evaluate the mechanical properties of human dentin under different hydration conditions. The occlusal dentin of five third molars was exposed and cut into 1 mm(2) dentin slabs. The slabs were then polished and further cut into 1 mm(2) dentin beams and stored in distilled water. Two beams/tooth were used for testing their hardness (H) and elastic modulus (E) at 5 min (baseline), 1 h, and 24 h after dehydration (23 degrees C and 30% RH), and also for measuring weight at following dehydration times: 0 min, 5 min, 1 h, and 24 h. Five additional molars were employed to prepare 0.4 mm(2) dentin beams (3/tooth) for determining ultimate tensile strength (UTS) at 5 min (baseline), 1 h, and 24 h post-dehydration. Statistical significance was set at alpha = 0.05. Dehydration time significantly affected H, E, weight-loss, and UTS of dentin (p < 0.05). H and E values showed a strongly positive and significant correlation (r > 0.5, p < 0.05). Dehydration can substantially modify the mechanical properties of dentin, leading to misinterpretation of restorative outcomes in vitro.
Type: article
Appears in Collections:歯学院・歯学研究院 (Graduate School of Dental Medicine / Faculty of Dental Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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