Soubhagya M, Goud K Mallikarjun, Deepak B S, Thakur Sophia, Nandini T N, Arun J
Reader, Department of Conservative Dentistry and Endodontics, Anil Neerukonda Institute of Dental Sciences, Sangivalasa, Visakhapatnam, Andra Pradesh.
Professor, Department of Conservative Dentistry & Endodontics, Bapuji Dental College, Davangere, Karnataka, India.
J Int Oral Health. 2015 Apr;7(4):27-31.
The use of resin-modified glass Ionomer cement in sandwich technique is widely practiced with the advent of various newer generation of composites the bond between resin-modified glass Ionomer and these resins should be validated. This study is done to evaluate the interfacial microgaps between different types of liners and dentin, liners and composite (Filtek p60 [FLp60]) using scanning electron microscope (SEM).
Standardized Class V preparations were performed in buccal/lingual surfaces of 30 caries, crack and defect-free extracted human third molars. The prepared teeth were divided into three groups. Group I: Single bond (SB), Group II: SB + synergy flow, Group III: SB + vitrebond. They were restored with composite resin FLp60, according to the manufacturer instructions. The SB + vitrebond, cross-sectioned through the canter of the restoration. The specimens were fixed, dehydrated, polished, and processed for SEM. The internal adaptation of the materials to the axial wall was analyzed under SEM with ×1000 magnification.
The data obtained were analyzed with nonparametric tests (Kruskal-Wallis, P < 0.05). flowable composite or resin-modified glass ionomer applied in conjunction with adhesive resulted in statistically wider microgaps than occurred when the dentin was only hybridized prior to the restoration.
Hybridization of dentin only provides superior sealing of the dentin-restoration interface than does flowable resin or resin-modified glass ionomer.
随着各种新一代复合材料的出现，树脂改性玻璃离子水门汀在三明治技术中的应用广泛开展，树脂改性玻璃离子与这些树脂之间的粘结应得到验证。本研究旨在使用扫描电子显微镜（SEM）评估不同类型的衬层与牙本质、衬层与复合材料（Filtek p60 [FLp60]）之间的界面微间隙。
在30颗无龋、无裂纹和缺陷的拔除人类第三磨牙的颊/舌面制备标准化V类洞。将制备好的牙齿分为三组。第一组：单键（SB），第二组：SB + 协同流，第三组：SB + 玻璃离子粘结剂。按照制造商说明用复合树脂FLp60进行修复。对SB + 玻璃离子粘结剂修复体，沿修复体中心进行横断面切割。将标本固定、脱水、抛光，并进行SEM处理。在SEM下以×1000放大倍数分析材料与轴向壁的内部适应性。
所得数据采用非参数检验（Kruskal-Wallis检验，P < 0.05）进行分析。与粘结剂联合应用的可流动复合树脂或树脂改性玻璃离子导致的微间隙在统计学上比仅在修复前对牙本质进行混合时更宽。
仅对牙本质进行混合比可流动树脂或树脂改性玻璃离子能更好地封闭牙本质 - 修复体界面。
