Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
J Appl Oral Sci. 2011 Oct;19(5):455-61. doi: 10.1590/s1678-77572011000500004.
The purpose of this study was to provide information regarding the marginal adaptation of composite resin onlays in primary teeth previously treated with 1% sodium hypochlorite (NaOCl) (pulp irrigant) using two different resin luting agents.
Forty extracted sound primary molars had their crowns prepared in a standardized machine and were randomly divided into 4 groups (n=10): G1 (1% NaOCl irrigation+EnForce); G2 (EnForce); G3 (1% NaOCl irrigation+Rely X); G4 (Rely X). The onlays were made with Z250 composite resin on plaster models. After luting, the tooth/restoration set was stored in 100% relative humidity at 37ºC for 24 h and finished with Soflex discs. Caries Detector solution was applied at the tooth/restoration interface for 5 s. The specimens were washed and four digital photos of each tooth were then taken. The extents of the gaps were measured with Image Tool 3.0 software. The percentage data were submitted to a Kruskal-Wallis test (α=0.05). The Relative Risk test analyzed the chance of a gap presence correlated to each group.
There were no statistically significant differences (p>0.05) among the groups. The relative risk test revealed that some groups were more apt to have a presence of gaps than others.
Neither the 1% NaOCl treatment nor the resin luting agents caused any alterations in the dental substrate that could have influenced the marginal adaptation of composite onlays in primary teeth.
本研究旨在提供关于使用两种不同树脂黏结剂对先前用 1%次氯酸钠（NaOCl）（牙髓冲洗剂）处理过的乳牙复合树脂嵌体边缘适应性的信息。
40 颗从口腔中拔出的完整初级磨牙在标准化机上进行牙冠预备，并随机分为 4 组（n=10）：G1（1% NaOCl 冲洗+EnForce）；G2（EnForce）；G3（1% NaOCl 冲洗+Rely X）；G4（Rely X）。嵌体使用 Z250 复合树脂在石膏模型上制作。黏结后，将牙/修复体置于 37°C、100%相对湿度下保存 24 小时，并用 Soflex 盘完成最终打磨。在牙/修复体界面上涂抹 5 秒龋齿探测器溶液。将标本洗净，然后对每颗牙拍摄 4 张数码照片。使用 Image Tool 3.0 软件测量间隙的程度。百分比数据进行 Kruskal-Wallis 检验（α=0.05）。相对风险检验分析了各组存在间隙的可能性。
各组之间无统计学差异（p>0.05）。相对风险检验表明，某些组比其他组更容易存在间隙。
1% NaOCl 处理或树脂黏结剂均未对牙本质基质造成任何影响，从而影响初级牙齿复合树脂嵌体的边缘适应性。
