CLINICAL EVALUATION OF FLOWABLE COMPOSITE RESIN

这个子项目是利用由NIH/NCRR资助的中心拨款提供的资源的许多研究子项目之一。子项目和调查员(PI)可能从另一个NIH来源获得了主要资金，因此可能会出现在其他CRISE条目中。列出的机构是针对中心的，而不一定是针对调查员的机构。本研究将检验一种新开发的可流动复合树脂修复小型咬合病损的临床效果。两种流动复合树脂中的一种可以修复小的龋齿病变。One Teter-Flow是一种公认的复合树脂，具有更少的填料装载量，以改善适应性。另一种为L.D.Culk的新材料。这些材料将被放置在同一患者的两种咬合腔制剂中，并对磨损、固位、颜色匹配、边缘适应、解剖形态、边缘变色、轴向轮廓和继发性龋齿进行评估。术后的敏感度将使用视觉模拟评分，牙龈状况将使用牙龈指数的Loe和Silness进行评估。将插入每种材料的30个一级修复体，总共60个修复体。病变将被准备好，龋齿将被移除，并使用橡胶坝隔离。所有粘接都将使用每个制造商的粘结剂来润湿表面。这两种制剂将接受不同的复合材料和不同的粘接技术来评估这些系统。修复将以一到两个增量放置，每个增量用可见光固化装置固化20秒。将使用硬质合金精加工毛刺去除毛刺，然后是精加工条带和圆盘(增强抛光系统)。每个修复体将在基线(修复体放置后一周)、3个月、6个月和1年时进行直接和间接评估。使用校准的检查员，将评估每个修复体的边缘变色、继发性龋齿、解剖形态丧失、固位、表面纹理和边缘适合性。幻灯片将记录复合修复体的边缘染色。每次召回都会留下印记，并用来确定修复体的磨损。每年将使用方差分析对分组进行比较，以重复测量，显著性水平设置为0.05。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. This study will examine the clinical efficacy of a newly developed flowable composite resin for the restoration of small occlusal caries occlusal lesions. Small carious lesion occlusal lesions will be restored with one of two flowable composite resins. One Tetric-Flow is a well-recognized composite resin with decreased filler loading to improve adaptation. The other is a new material from L. D. Caulk. These materials will be placed in two occlusal cavity preparations in the same patient and evaluated for wear, retention, color match, marginal adaptation, anatomic form, marginal discoloration, axial contour, and secondary caries. Post-operative Sensitivity will be measured using a Visual Analog Scale and Gingival Condition will be assessed using the Gingival Index of Loe and Silness. Thirty class 1 restorations of each material for a total of 60 restorations will be inserted. The lesions will be prepared and caries removed, with rubber dam isolation. All bonding will be done using each manufacturer's bonding agent to moist surfaces. The two preparations will receive the different composites and different adhesive techniques to evaluate those systems. The restoration will be placed in one or two increments with each increment cured for 20 seconds with a visible light-curing unit. Carbide finishing burs will be used to remove gross excess, followed by finishing strips and disks (Enhance Polishing System). Each restoration will be evaluated directly and indirectly at baseline (one week after restoration placement), 3 months, 6 months, and one year. Using calibrated examiners, each restoration will be evaluated for marginal discoloration, secondary caries, loss of anatomical form, retention, surface texture, and marginal adaption. Slides will document marginal staining of the composite restoration. Impressions will be made at each recall and used to determine wear of the restorations. Groups will be compared annually using an ANOVA for Repeated Measures with the level of significance set at .05.