Franco Eduardo Batista, Gonzaga Lopes Lawrence, Lia Mondelli Rafael Francisco, da Silva e Souza Mário Honorato, Pereira Lauris José Roberto
Department of Operative Dentistry, Bauru Dental School, University of São Paulo, Brazil.
Am J Dent. 2003 Jun;16(3):211-4.
To evaluate the effect of the cavity configuration factor (CF) on the marginal microleakage of cervical restorations with four aesthetic restorative materials.
Conventional cavities, 2.9 mm in diameter and 1.5 mm deep, with CF=2.7 and "saucer"-shaped ones with CF=2 were created in 60 extracted premolars. The following groups were established: G1: Z100/Single Bond, G2: Freedom/Stae, G3: Vitremer/Primer and G4: Durafill/Durafill Bond, following each manufacturer's directions. Thermocycling of the specimens was performed in an aqueous solution of 2% buffered methylene blue, with the temperature varying between 5 to 55 degrees C, for a total of cycles of 60 minutes per day, for 7 days. The specimens were then sectioned and evaluated by two observers using photographs acquired from a stereomicroscope. The values were subjected to Kruskal-Wallis analysis and the Dunn and Wilcoxon test.
The averages of the microleakage scores observed in the conventional and "saucer"-shaped cavities were respectively: G1: 0.66/0.46; G2: 0.92/0.69; G3: 1.8/1.86; G4: 3.54/2.3.
评估洞形系数（CF）对四种美学修复材料颈部修复体边缘微渗漏的影响。
在60颗拔除的前磨牙上制备直径2.9mm、深1.5mm、CF = 2.7的常规洞形以及CF = 2的“碟形”洞形。按照各制造商的说明，设立以下几组：G1：Z100/单键；G2：Freedom/Stae；G3：Vitremer/底漆；G4：Durafill/Durafill Bond。将标本在2%缓冲亚甲蓝水溶液中进行热循环，温度在5至55摄氏度之间变化，每天共循环60分钟，持续7天。然后将标本切片，由两名观察者使用从体视显微镜获取的照片进行评估。对这些值进行Kruskal-Wallis分析以及Dunn和Wilcoxon检验。
在常规洞形和“碟形”洞形中观察到的微渗漏评分平均值分别为：G1：0.66/0.46；G2：0.92/0.69；G3：1.8/1.86；G4：3.54/2.3。
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