Boron nitride nanoplatelets as reinforcement material for dental ceramics

Bin Lee, Jae Sung Kwon, Muhammad Waqas Khalid, Kwang Mahn Kim, Joonhui Kim, Kyoung Mook Lim, Soon Hyung Hong

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Objective: The main goal of this research was to demonstrate the potential value of boron nitride nanoplatelets (BNNPs), which have excellent mechanical properties and biocompatibility, as a suitable reinforcement for dental materials. Methods: The BNNPs were prepared by exfoliating h-BN via high-energy ball-milling and dispersion on a zirconia matrix. Then the composite powder was consolidated using spark plasma sintering. Fracture toughness, flexural strength and wear resistance were the mechanical properties explored. Agar diffusion-based biocompatibility testing was carried out. Low temperature degradation tests were also performed in a steam environment in an autoclave. Results: The BNNPs dispersed zirconia exhibited improved strength (up to 27.3%), and fracture toughness was also increased (up to 37.5%) with the addition of 1–1.5 vol.% BNNPs. Tribological properties were also enhanced by the addition of BNNPs. The cytotoxicity tests confirmed that the BNNPs do not have obvious toxicity. The accelerated low-temperature degradation experiment revealed the barrier properties of the BNNPs, whose addition almost fully inhibited the degradation of the zirconia matrix in a humid environment. Significance: The main contribution of this study is the introduction of an advanced material, BNNP, which can be used as a biocompatible reinforcement for dental materials, resulting in enhanced mechanical properties of the system due to its unique structure and extraordinary properties.

Original languageEnglish
Pages (from-to)744-754
Number of pages11
JournalDental Materials
Volume36
Issue number6
DOIs
Publication statusPublished - 2020 Jun

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education ( 2018R1D1A1B07043025 ) and Korea Advanced Institute of Science and Technology (KAIST, TRKO201600002300 )

Publisher Copyright:
© 2020 The Academy of Dental Materials

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

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