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学科主题: 口腔医学
题名:
Polymerization characteristics, flexural modulus and microleakage evaluation of silorane-based and methacrylate-based composites
作者: Gao, Bo-tao; Lin, Hong; Han, Jian-min; Zheng, Gang
刊名: AMERICAN JOURNAL OF DENTISTRY
发表日期: 2011-04-01
卷: 24, 期:2, 页:97-102
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Dentistry, Oral Surgery & Medicine
研究领域[WOS]: Dentistry, Oral Surgery & Medicine
关键词[WOS]: MICROTENSILE BOND STRENGTH ; CLASS-V RESTORATIONS ; CONTRACTION STRESS ; DENTAL COMPOSITES ; SHRINKAGE STRESS ; C-FACTOR ; RESIN ; ADHESIVES ; SYSTEMS ; ELASTICITY
英文摘要:

Purpose: To compare the behavior of a new low-shrinkage silorane-based composite (P90) with two conventional methacrylate-based composites, in terms of polymerization shrinkage, polymerization stress, gel point, flexural modulus and microleakage. Methods: The materials tested were P90 (3M ESPE), AP-X (Kuraray), Quixfil (Dentsply). Polymerization shrinkage was measured using the Accuvol method. Polymerization stress was assessed using a stress-strain analyzer. Polymerization shrinkage (%) and force (N) were continuously recorded for 300 seconds. Polymerization shrinkage and stress after 300 seconds and gel point were recorded. Flexural modulus was obtained by three-point bending. A laboratory microleakage test was performed. Class V cavities prepared on labial surfaces of 70 freshly extracted human teeth were randomly assigned to the seven groups (N=10): P90/PSA (P90 System Adhesive), AP-X/CBA (Clearfil SE Bond Adhesive), Quixfil/XBA (XP Bond Adhesive), P90/CBA, P90/XBA, AP-X/PSA, Quixfil/PSA. The teeth were immersed in 1% basic fuchsin dye for 24 hours at room temperature. All teeth were cut in a labial-lingual direction and the penetration of dye along the wall of cavities was observed under a stereoscopic light microscope. Statistical analysis was performed with one-way ANOVA, Kruskal-Wallis ANOVA test and post hoc tests (P < 0.05). Results: The low-shrinkage silorane-based composite (P90) exhibited significantly lower polymerization shrinkage, polymerization stress, flexural modulus and a later gel point than the conventional methacrylate-based composites. In the microleakage test, P90/PSA, AP-X/CBA, AP-X/PSA demonstrated the lowest microleakage scores without a significant difference among them (P > 0.05). Quixfil/XPA exhibited the highest microleakage scores. (Am J Dent 2011;24:97-102).

语种: 英语
WOS记录号: WOS:000291236700006
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/56492
Appears in Collections:北京大学口腔医学院_期刊论文

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作者单位: Peking Univ Sch & Hosp Stomatol, Dept Dent Mat, Beijing, Peoples R China

Recommended Citation:
Gao, Bo-tao,Lin, Hong,Han, Jian-min,et al. Polymerization characteristics, flexural modulus and microleakage evaluation of silorane-based and methacrylate-based composites[J]. AMERICAN JOURNAL OF DENTISTRY,2011,24(2):97-102.
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