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Study Findings on Optical Coherence Tomography Are Outlined in Reports from Chang Gung Memorial Hospital (Examination of ceramic/enamel interfacial...

September 10, 2014



Study Findings on Optical Coherence Tomography Are Outlined in Reports from Chang Gung Memorial Hospital (Examination of ceramic/enamel interfacial debonding using acoustic emission and optical coherence tomography)

By a News Reporter-Staff News Editor at Biotech Week -- Current study results on Optical Coherence Tomography have been published. According to news reporting originating in Taoyuan, Taiwan, by NewsRx journalists, research stated, "This study investigates monitored micro-crack growth and damage in the ceramic/enamel adhesive interface using the acoustic emission (AE) technique with optical coherence tomography (OCT) under fatigue shear testing. Shear bond strength (SBS) was measured first with eight prepared ceramic/enamel adhesive specimens under static loads."

The news reporters obtained a quote from the research from Chang Gung Memorial Hospital, "The fatigue shear testing was performed with three specimens at each cyclic load according to a modified ISO14801 method, applying at 80%, 75%, 70%, and 65% of the SBS to monitor interface debonding. The number of cycles at each load was recorded until ceramic/enamel adhesive interface debonding occurred. The AE technique was used to detect micro-crack signals in static and fatigue shear bond tests. The results showed that the average SBS value in the static tests was 18.07 +/- 1.72 MPa (mean +/- standard deviation), expressed in Newton's at 56.77 +/- 5.40 N. The average number of fatigue cycles in which ceramic/enamel interface damage was detected in 80%, 75%, 70% and 65% of the SBS were 41, 410, 8141 and 76,541, respectively. The acoustic behavior varied according to the applied load level. Events were emitted during 65% and 70% fatigue tests. A good correlation was observed between the crack location in OCT images and the number of AE signal hits. Signcance. The AE technique combined with OCT images as a pre-clinical assessment tool to determine the integrity of cemented load bearing restored ceramic material. Sustainable cyclic load stresses in ceramic/enamel bonded specimens were substantially lower than the measured SBS."

According to the news reporters, the research concluded: "Predicted S-N curve showed that the maximum endured load was 10.98 MPa (about 34.48 N) passing 10(6) fatigue cyclic."

For more information on this research see: Examination of ceramic/enamel interfacial debonding using acoustic emission and optical coherence tomography. Dental Materials, 2014;30(8):910-916. Dental Materials can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier - www.elsevier.com; Dental Materials - www.elsevier.com/wps/product/cws_home/601024)

Our news correspondents report that additional information may be obtained by contacting C.L. Lin, Chang Gung Memorial Hospital, Dept. of Gen Dental, Taoyuan, Taiwan. Additional authors for this research include W.C. Kuo, Y.H. Chang, J.J. Yu and Y.C. Lin (see also Optical Coherence Tomography).

Keywords for this news article include: Taoyuan, Taiwan, Asia, Imaging Technology, Optical Coherence Tomography

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Biotech Week


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