Time-Based Characteristics of Acoustic Emission During Dental Composite Restoration

치아 와동의 복합레진 수복시 음향방출의 시간적 발생 특성

  • Gu, Ja-Uk (Dept. of Mechanical Engineering, Hanyang Univ.) ;
  • Choi, Nak-Sam (Dept. of Mechanical Engineering, Hanyang Univ.) ;
  • Arakawa, Kazuo (Research Institute for Applied Mechanics, Kyushu Univ.)
  • Received : 2010.09.20
  • Accepted : 2010.11.18
  • Published : 2011.02.01


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 $2^{nd}$ 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.


Composite Resin;Polymerization Shrinkage;Contraction Stress;Acoustic Emission


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