長徑距纖維強化壓克力樹脂暫用固定局部義齒之折斷負荷

Fracture Load of Long Span fiber-reinforced Acrylic Resin Provisional Fixed Partial Denture

黃俞群(Yu-Chiun Huang) ； 王震乾(Jen-Chyan Wang) ； 洪純正(Chun-Cheng Hung)

《Taiwan Journal of Oral Medicine & Health Sciences》 21卷1期 (2005/04) Pp. 23-32

https://doi.org/10.7059/TJOMHS.200504.0023

摘要

Traditional PMMA resin provisional fixed partial dentures often get fractured in areas of force concentration which result in clinical inconvenience. The purpose of this study was to evaluate the fracture load and fracture pattern of different fibers reinforced long span acrylic resin provisional restoration, and the relationships among fiber type, reinforced position/length and fracture load of samples. In the experiment, 80 standardized 4-unit bridge samples were fabricated with PMMA resin. Next, they were divided into 8 groups evenly. Positive control group were intact acrylic resin specimens, and negative control group were acrylic resin samples reinforced with 0.016×0.022 stainless wire. The experiment groups were acrylic resin samples reinforced with different length (4,18,30mm) of glass fiber (FibreKor)/polyethylene fibers (Construct), and were reinforced in connector between two pontics、extended to both side of the abutments and extended to the occlusal surface of both abutments respectively. All samples were under thermocycling. After that, the load was applied to resin samples by a universal testing machine. Finally the fracture load and fracture pattern of all samples were recorded and the fracture surfaces of selective samples were observed under SEM. One-way ANOVA indicated significant differences between fiber reinforced groups and control group/stainless wire reinforced group (P＜0.00l). Two-way ANOVA revealed that the fracture load are not statistically significant different in the fiber reinforced groups no matter the fiber type or reinforced fiber length (P＞0.05). As for the fracture pattern, all samples are displayed ”partial” fractures no matter with reinforcement or not. The results of this study indicate that fiber-reinforcement of FibreKor/Construct indeed enhances the fracture resistance of long span provisional fixed partial denture. Increase fiber reinforced length is not relatively significant increase the fracture load of long span fixed partial denture.

關鍵字

纖維強化 ； 壓克力樹脂 ； 暫用固定局部義齒

並列摘要

Traditional PMMA resin provisional fixed partial dentures often get fractured in areas of force concentration which result in clinical inconvenience. The purpose of this study was to evaluate the fracture load and fracture pattern of different fibers reinforced long span acrylic resin provisional restoration, and the relationships among fiber type, reinforced position/length and fracture load of samples. In the experiment, 80 standardized 4-unit bridge samples were fabricated with PMMA resin. Next, they were divided into 8 groups evenly. Positive control group were intact acrylic resin specimens, and negative control group were acrylic resin samples reinforced with 0.016×0.022 stainless wire. The experiment groups were acrylic resin samples reinforced with different length (4,18,30mm) of glass fiber (FibreKor)/polyethylene fibers (Construct), and were reinforced in connector between two pontics、extended to both side of the abutments and extended to the occlusal surface of both abutments respectively. All samples were under thermocycling. After that, the load was applied to resin samples by a universal testing machine. Finally the fracture load and fracture pattern of all samples were recorded and the fracture surfaces of selective samples were observed under SEM. One-way ANOVA indicated significant differences between fiber reinforced groups and control group/stainless wire reinforced group (P＜0.00l). Two-way ANOVA revealed that the fracture load are not statistically significant different in the fiber reinforced groups no matter the fiber type or reinforced fiber length (P＞0.05). As for the fracture pattern, all samples are displayed ”partial” fractures no matter with reinforcement or not. The results of this study indicate that fiber-reinforcement of FibreKor/Construct indeed enhances the fracture resistance of long span provisional fixed partial denture. Increase fiber reinforced length is not relatively significant increase the fracture load of long span fixed partial denture.

並列關鍵字

fiber-reinforced ； acrylic resin ； provisional fixed partial denture