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Study of Bonding Fatigue Strength by Dental Adhensive Resin

牙科粘接树脂粘接疲劳强度的研究

基本信息

批准号：
05404068
负责人：
NAKAMURA Kengo
金额：
$ 7.23万
依托单位：
Nippon Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

项目摘要

Using two kinds of PFM alloys, ISHIFUKU KIK HARD II (gold alloy, for short, KIK) and SHOFU UNI METAL (nickel-choromium alloy, for short, UMT), the adhesion test pieces having 10mm diameter and 4mm thickness and equipped with screw at another side, were cast using dental precision casting. The set of two test pieces were adhered by two kinds of dental adhesives, a phosphoric ester system, PANAVIA 21EX (for short, PX21) and 4-META system Super Bond C&B (for short, SB), and thickness of adhesive layr were changed about 30,230 and 430 mum. The specimens were immersed in distillled water at 37ﾟC for 1 day or 3 days, and then were applied vertical tension load to adhension interface, and static tension bonding strength were measured. And using servo pulse controller, 50Hz altenative tensile stress were applied vertically to the adhesion interface of the specimen, and bonding fatigue strength at 10^6 cycle (10^6 bonding fatigue strength) were measured by staircase method. In respect of the th … More ickness of adhesives (factor A), the immersion time of the specimens (factor B), kind of adhesives (factor C) and kind of alloys (factor D), the measuring values obtained were analized based on four-way analysis of variance and the effects of factors were evaluated.The result may be summerized as follows. Static tension bonding strength (sigma_t) was in the range of 39-53MPa under 24 conditions. The 10^6 bonding fatigue strength (sigma_f) decreased in the range of 18-37MPa, and sigma_f・sigma_t^<-1> (ratio of 10^6 bonding fatigue strength to static bonding tensile strength) were ranged from 0.54 to 0.67. Using SB adhesives, the average effect (average of 12 different conbinations) of sigma_t was 46MPa and sigma_f was 32MPa. Using PX21 adhesives, they were 42MPa (sigma_t), and 24MPa (sigma_f), respectively. sigma_f and sigma_t of PX21 were smaller than SB's in both. When the immersion time of the specimens increased to 7days from 1day, sigma_t and sigma_f of SB increased, but using PX21, sigma_t increased slightly and sigma_f decreased conversly. In respect of the main effect of KIK and UMT alloys, sigma_t, was statistically highly significant, and they were 46MPa using UMT and 37MPa using KIK,respectively. Less

使用两种PFM合金，ISHIFUKU KIK HARD II（金合金，简称KIK）和SHOFU UNI METAL（镍-铬合金，简称UMT），使用牙科精密铸造法铸造直径为10 mm、厚度为4 mm且在另一侧配备有螺钉的粘附测试件。用两种牙科粘合剂，磷酸酯系统PANAVIA 21 EX（简称PX 21）和4-Meta系统Super Bond C&B（简称SB），粘合两个测试片的组，并且粘合剂层的厚度改变约30、230和430 μ m。将试件在37 ℃的沸水中浸泡1 d或3 d，然后对粘接界面施加垂直拉伸载荷，测定静拉伸粘接强度。并利用伺服脉冲控制器，在试样的粘接界面垂直方向施加50 Hz交变拉应力，采用阶梯法测量10^6次循环的粘接疲劳强度（10^6次粘接疲劳强度）。关于第 ...更多信息对胶粘剂的厚度（因素A）、试样的浸泡时间（因素B）、胶粘剂的种类（因素C）和合金的种类（因素D）的测定值进行了四因素方差分析，并对各因素的影响进行了评价。在24种条件下，静态拉伸强度σ_t在39- 53 MPa之间。10^6粘结疲劳强度（sigma_f）在18- 37 MPa范围内下降，sigma_f·sigma_t^<-1>（10^6粘结疲劳强度与静态粘结拉伸强度之比）范围为0.54至0.67。使用SB胶粘剂时，σ_t的平均效应（12种不同组合的平均值）为46 MPa，σ_f为32 MPa。使用PX 21胶粘剂时，σ_t和σ_f分别为42 MPa和24 MPa。PX 21的sigma_f和sigma_t均小于SB。当试样浸泡时间从1d增加到7 d时，SB的σ_t和σ_f增加，而PX 21的σ_t略有增加，σ_f反而下降。KIK和UMT合金的主效应σ_t分别为46 MPa和37 MPa，差异有统计学意义。少