CLINICAL EVALUATION OF FLOWABLE COMPOSITE RESIN

本子项目是利用由NIH/NCRR资助的中心赠款提供的资源的众多研究子项目之一。子项目和研究者（PI）可能已经从另一个NIH来源获得了主要资金，因此可以在其他CRISP条目中表示。列出的机构是中心的，不一定是研究者的机构。本研究将探讨一种新开发的可流动复合树脂修复小龋的临床疗效。小的龋齿病变可以用两种可流动的复合树脂中的一种来修复。一种Tetric-Flow是一种公认的复合树脂，它减少了填料的负荷，以提高适应性。另一种是l·d·考克的新材料。这些材料将放置在同一患者的两个牙合腔准备中，并评估磨损，保留，颜色匹配，边缘适应，解剖形态，边缘变色，轴向轮廓和继发龋。术后敏感性将使用视觉模拟量表测量，牙龈状况将使用牙龈爱和柔软度指数评估。每种材料的30个1级修复体将被插入，总共60个修复体。用橡胶坝隔离，准备病变，去除龋齿。所有的粘合都将使用每个制造商的粘合剂来湿润表面。这两种制剂将接受不同的复合材料和不同的粘合技术来评估这些系统。修复将以一个或两个增量放置，每个增量用可见光固化装置固化20秒。硬质合金精加工毛刺将用于去除毛屑，然后精加工条和盘（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年进行直接和间接评估。使用校准的检查器，每个修复体将评估边缘变色，继发性龋齿，解剖形态损失，保留，表面纹理和边缘适应性。载玻片将记录复合修复的边缘染色。每次召回时都会留下印痕，用来确定修复体的磨损程度。每年对各组进行比较，使用重复测量方差分析，显著性水平设为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.