Garoushi Sufyan, Mangoush Enas, Vallittu Mangoush, Lassila Lippo
Department of Restorative Dentistry & Periodontology, Institute of Dentistry, Libyan International Medical University, Benghazi, Libya ; Department of Biomaterials Science and BioCity Turku Biomaterials Research Program, Institute of Dentistry, University of Turku, Turku, Finland.
Department of Biomaterials Science and BioCity Turku Biomaterials Research Program, Institute of Dentistry, University of Turku, Turku, Finland.
Open Dent J. 2013 Dec 30;7:181-5. doi: 10.2174/1874210601307010181. eCollection 2013.
To determine the static load-bearing capacity of direct composite onlay restorations made of novel filling composite resin system which combines short fiber-reinforced composite resin (FC) and conventional particulate filler composite resin (PFC).
Three groups of onlay restorations were fabricated (n = 8/group); Group A: made from conventional particulate filler composite resin (Z250, 3M-ESPE, USA, control), Group B: made from short fiber-reinforced composite resin (EverX posterior, StickTeck Ltd, member of GC group, Turku, Finland) as substructure with 1 mm surface layer of PFC, Group C: made from FC composite resin. The specimens were incrementally polymerized with a hand-light curing unit for 80 s before they were statically loaded with two different sizes (3 & 6 mm) of steel ball until fracture. Failure modes were visually examined. Data were analyzed using ANOVA (p = 0.05).
ANOVA revealed that onlay restorations made from FC composite resin had statistically significantly higher load-bearing capacity (1733 N) ( p < 0.05) than the control PFC composite resin (1081 N). Onlays made of FC composite resin with a surface layer of PFC gave force values of 1405 N which was statistically higher than control group ( p < 0.05). No statistically significant difference was found in the load-bearing capacity between groups loaded by different ball sizes.
Onlay restorations combining base of short fiber reinforced composite resin as substructure and surface layer of conventional composite resin displayed promising performance in high load bearing areas.
确定由新型填充复合树脂体系制成的直接复合嵌体修复体的静态承载能力，该体系结合了短纤维增强复合树脂（FC）和传统颗粒填料复合树脂（PFC）。
制作三组嵌体修复体（每组n = 8）；A组：由传统颗粒填料复合树脂制成（Z250，3M-ESPE，美国，对照组），B组：由短纤维增强复合树脂（EverX posterior，StickTeck Ltd，GC集团成员，芬兰图尔库）作为底层结构，并在表面有1mm厚的PFC层，C组：由FC复合树脂制成。在使用两种不同尺寸（3和6mm）的钢球对标本进行静态加载直至断裂之前，先用手持式光固化装置对标本进行80秒的逐步聚合。通过肉眼检查失效模式。使用方差分析（p = 0.05）对数据进行分析。
方差分析显示，由FC复合树脂制成的嵌体修复体的承载能力（1733N）在统计学上显著高于对照PFC复合树脂（1081N）（p < 0.05）。由带有PFC表面层的FC复合树脂制成的嵌体产生的力值为1405N，在统计学上高于对照组（p < 0.05）。在由不同尺寸钢球加载的组之间，未发现承载能力有统计学上的显著差异。
将短纤维增强复合树脂作为底层结构和传统复合树脂表面层相结合的嵌体修复体在高承载区域显示出良好的性能。
