|Non-destructive examination of interfacial debonding using acoustic emission|
|Li, Haiyan1; Li, Jianying1; Yun, Xiaofei2; Liu, Xiaozhou3; Fok, Alex Siu-Lun1|
|关键词||Dental restoration Composite resins Shrinkage Interfacial debonding Acoustic emission Micro-CT|
|WOS标题词||Science & Technology|
|类目[WOS]||Dentistry, Oral Surgery & Medicine ; Materials Science, Biomaterials|
|研究领域[WOS]||Dentistry, Oral Surgery & Medicine ; Materials Science|
|关键词[WOS]||TENSILE BOND STRENGTH ; SHRINKAGE-STRESS ; COMPOSITE RESTORATIONS ; RESIN-COMPOSITES ; POLYMERIZATION ; INTEGRITY ; FRACTURE ; SHAPE ; AREA ; SEM|
Objectives. This study aims to assess the viability of using the acoustic emission (AE) measurement technique to detect and monitor in situ the interfacial debonding in resin composite restorations due to build-up of shrinkage stresses during polymerization of the composite.
Materials and methods. The non-destructive testing technique that measures acoustic emission (AE) was used to detect and monitor the interfacial debonding in resin composite during curing of the composite. Four groups of specimens, n = 4 each, were tested: (1) intact human molars with Class-I cavities restored with the composite Z100 (3M ESPE, USA); (2) intact human molars with Class-I cavities restored with the composite Filtek (TM) P90 (3M ESPE, USA); (3) ring samples prepared from the root of a single bovine tooth and ′restored′ with Z100; (4) freestanding pea-size specimens of Z100 directly placed on the AE sensor. The restorations in Groups (1)-(3) were bonded to the tooth tissues with the adhesive Adper (TM) Scotchbond (TM) SE Self-Etch (3M ESPE, USA). The composites in all the specimens were cured with a blue light (3M ESPE, USA) for 40 s. The AE signals were recorded continuously for 10 min from the start of curing. Non-destructive 3D imaging was performed using X-ray micro-computed tomography (micro-CT) to examine the bonding condition at the tooth-restoration interface.
Results. The development of AE events followed roughly that of the shrinkage stress, which was determined separately by the cantilever beam method. The number of AE events in the real human tooth samples was more than that in the ring samples, and no AE events were detected in the pea-size specimens placed directly on the AE sensor. The number of AE events recorded in the specimens restored using Z100 was more than that found in specimens restored with Filtek P90. The micro-CT imaging results showed clear interfacial debondings in the tooth specimens restored with Z100 after curing, but no clear debonding was found in the P90 specimens.
Conclusions. The AE technique is an effective tool for detecting and monitoring in situ the interfacial debonding of composite restorations during curing. It can potentially be employed to evaluate the development of shrinkage stress and the quality of interfacial bonds in teeth restored with different composite materials, cavity geometries, and restorative techniques. (C) 2011 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
|资助机构||University of Minnesota ; China Scholarship Council|
|作者单位||1.Univ Minnesota, Sch Dent, Minnesota Dent Res Ctr Biomat & Biomech, Minneapolis, MN 55455 USA|
2.Sichuan Univ, State Key Lab Oral Dis, Chengdu, Peoples R China
3.Peking Univ, Sch Stomatol, Beijing, Peoples R China
|Li, Haiyan,Li, Jianying,Yun, Xiaofei,et al. Non-destructive examination of interfacial debonding using acoustic emission[J]. DENTAL MATERIALS,2011,27(10):964-971.|
|APA||Li, Haiyan,Li, Jianying,Yun, Xiaofei,Liu, Xiaozhou,&Fok, Alex Siu-Lun.(2011).Non-destructive examination of interfacial debonding using acoustic emission.DENTAL MATERIALS,27(10),964-971.|
|MLA||Li, Haiyan,et al."Non-destructive examination of interfacial debonding using acoustic emission".DENTAL MATERIALS 27.10(2011):964-971.|