Time-based characteristics of acoustic emission during dental composite restoration

Ja Uk Gu, Nak Sam Choi, Kazuo Arakawa

    Research output: Contribution to journalArticlepeer-review


    Acoustic emission (AE) signals were detected and analyzed in real time during the polymerization shrinkage of composite resin restoration in an artificial dental ring with a class I cavity. Most AE hit events were observed in the initial curing period of the 1st region with high contraction rate. The range of the 2nd region for the stainless steel specimen was shorter than that for the PMMA specimen but longer than that for the human dentin specimen. AE hit events showed a blast-type signal having an amplitude in the range of 25-45 dB and a frequency band of 100-200 kHz or 240-300 kHz. These values of amplitude and frequency indicated the fracture of resin or of the adhesive layer.

    Original languageEnglish
    Pages (from-to)169-174
    Number of pages6
    JournalTransactions of the Korean Society of Mechanical Engineers, A
    Issue number2
    Publication statusPublished - Feb 2011

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering


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