Cantekin Kenan, Delikan Ebru, Cetin Secil
Department of Pediatric Dentistry, Faculty of Dentistry, Erciyes University, Kayseri, Turkiye.
Eur J Dent. 2014 Jul;8(3):314-319. doi: 10.4103/1305-7456.137632.
The purposes of this research were to (1) compare the shear-peel bond strength (SPBS) of a band of a fixed space maintainer (SM) cemented with five different adhesive cements; and (2) compare the survival time of bands of SM with each cement type after simulating mechanical fatigue stress.
Seventy-five teeth were used to assess retentive strength and another 50 teeth were used to assess the fatigue survival time. SPBS was determined with a universal testing machine. Fatigue testing was conducted in a ball mill device.
The mean survival time of bands cemented with R & D series Nova Glass-LC (6.2 h), Transbond Plus (6.7 h), and R & D series Nova Resin (6.8 h) was significantly longer than for bands cemented with Ketac-Cem (5.4 h) and GC Equia (5.2 h) (P < 0.05).
Although traditional glass ionomer cement (GIC) cement presented higher retentive strength than resin-based cements (resin, resin modified GIC, and compomer cement), resin based cements, especially dual cure resin cement (nova resin cement) and compomer (Transbond Plus), can be expected to have lower failure rates for band cementation than GIC (Ketac-Cem) in the light of the results of the ball mill test.
本研究的目的是:(1)比较用五种不同粘结剂粘结的固定间隙保持器(SM)带环的剪切-剥离粘结强度(SPBS);(2)在模拟机械疲劳应力后,比较每种粘结剂类型的SM带环的存活时间。
75颗牙齿用于评估固位强度,另外50颗牙齿用于评估疲劳存活时间。用万能试验机测定SPBS。在球磨机装置中进行疲劳测试。
用研发系列Nova Glass-LC(6.2小时)、Transbond Plus(6.7小时)和研发系列Nova Resin(6.8小时)粘结的带环的平均存活时间明显长于用Ketac-Cem(5.4小时)和GC Equia(5.2小时)粘结的带环(P<0.05)。
尽管传统玻璃离子水门汀(GIC)比树脂基水门汀(树脂、树脂改性GIC和复合树脂水门汀)具有更高的固位强度,但根据球磨机试验结果,树脂基水门汀,尤其是双固化树脂水门汀(nova树脂水门汀)和复合树脂(Transbond Plus),在带环粘结方面的失败率可能低于GIC(Ketac-Cem)。