Pérez-Lajarín Leonor, Cortés-Lillo Olga, García-Ballesta Carlos, Cózar-Hidalgo Antonio
University of Murcia Dental School, Spain.
J Dent Child (Chic). 2003 Jan-Apr;70(1):24-8.
An in vitro study was conducted to evaluate enamel marginal microleakage following acid etching of two fissure sealants of established clinical efficacy. The purpose of this study was to assess sealant leakage following etching in combination with the use of latest-generation adhesives.
Clinicians removed 22 human premolars without caries for orthodontic reasons, stored them in distilled water, and sealed the occlusal surface. They used sealants Concise (3M) and Dyract seal (Dentsply DeTrey). They randomly distributed the premolars into two groups (N = 11) according to sealant used. The materials were manipulated according to the instructions of the manufacturer, and no invasive enamel preparing technique was used (enameloplasty). Staining was carried out with 2% fuchsin. The results were evaluated by the Mann-Whitney nonparametric test for the comparison of independent data samples.
Concise sealant was seen to produce significantly greater marginal leakage than Dyract seal (P=.02).
The application of an adhesive layer beneath the sealant afforded less microleakage than when no adhesive was used. Nevertheless despite the possibility of combining adhesives and sealant resins, with good bonding between both components over the entire fissure interface, microleakage was still observed, regardless of the material used. This suggests that presently there is no material is able to secure total sealing of the space between the material used and the dental tissue.
进行一项体外研究，以评估两种临床疗效已确立的窝沟封闭剂酸蚀后牙釉质边缘微渗漏情况。本研究的目的是评估结合使用新一代粘合剂进行酸蚀后封闭剂的渗漏情况。
临床医生因正畸原因拔除22颗无龋的人类前磨牙，将其储存在蒸馏水中，并封闭咬合面。他们使用了Concise（3M公司）和Dyract seal（登士柏德瑞公司）两种封闭剂。根据所使用的封闭剂将前磨牙随机分为两组（每组n = 11）。材料按照制造商的说明进行操作，未使用侵入性牙釉质预备技术（牙釉质成形术）。用2%品红进行染色。结果通过曼-惠特尼非参数检验对独立数据样本进行比较来评估。
观察到Concise封闭剂产生的边缘渗漏明显大于Dyract seal（P = 0.02）。
在封闭剂下方应用粘合剂层产生的微渗漏比不使用粘合剂时少。然而，尽管有可能将粘合剂和封闭剂树脂结合使用，且两种成分在整个裂隙界面上具有良好的粘结性，但无论使用何种材料，仍观察到微渗漏。这表明目前没有材料能够确保所用材料与牙体组织之间的间隙完全密封。
