Evaluation of marginal failures of dental composite restorations by acoustic emission analysis
- Authors
- Gu, Ja-Uk; Choi, Nak-Sam
- Issue Date
- Jun-2013
- Publisher
- JAPANESE SOC DENTAL MATERIALS DEVICES
- Keywords
- Composite resin; Acoustic emission; Contraction stress; Marginal failure; Dental restoration
- Citation
- DENTAL MATERIALS JOURNAL, v.32, no.3, pp.398 - 404
- Indexed
- SCIE
SCOPUS
- Journal Title
- DENTAL MATERIALS JOURNAL
- Volume
- 32
- Number
- 3
- Start Page
- 398
- End Page
- 404
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/27949
- DOI
- 10.4012/dmj.2012-262
- ISSN
- 0287-4547
- Abstract
- In this study, a nondestructive method based on acoustic emission (AE) analysis was developed to evaluate the marginal failure states of dental composite restorations. Three types of ring-shaped substrates, which were modeled after a Class I cavity, were prepared from polymethyl methacrylate, stainless steel, and human molar teeth. A bonding agent and a composite resin were applied to the ring-shaped substrates and cured by light exposure. At each time-interval measurement, the tooth substrate presented a higher number of AE hits than polymethyl methacrylate and steel substrates. Marginal disintegration estimations derived from cumulative AE hits and cumulative AE energy parameters showed that a signification portion of marginal gap formation was already realized within 1 min at the initial light-curing stage. Estimation based on cumulative AE energy gave 4 higher level of marginal failure than that based on AE hits. It was concluded that the AE analysis method developed in this study was a viable approach in predicting the clinical survival of dental composite restorations efficiently within a short test period.
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