Akbari Majid, Rouhani Armita, Samiee Sadeq, Jafarzadeh Hamid
Department of Restorative Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad 91735-984, Iran.
Int J Dent. 2012;2012:563203. doi: 10.1155/2012/563203. Epub 2011 Nov 3.
Objective. Determination of the effect of dentin bonding agent (DBA) on the prevention of tooth discoloration produced by mineral trioxide aggregate (MTA). Methods. 50 teeth were endodontically treated and after removal of 3 mm of obturating materials were divided into five groups. In white MTA (WMTA) and grey MTA (GMTA) groups, these materials were placed in root canal below the orifice. In DBA + WMTA and DBA + GMTA groups, DBAs were applied in the access cavity. Then, 3 mm of WMTA and GMTA was placed. The last 10 teeth served as control. All of teeth were restored and color measurement was recorded for each specimen at this time and 6 months later. Results. The mean tooth discoloration in WMTA and GMTA groups was significantly more than DBA + WMTA and DBA + GMTA groups, respectively. There was no significant difference between DBA + WMTA and DBA + GMTA groups and control group. Conclusion. Application of DBA before MTA may prevent tooth discoloration.
目的。确定牙本质粘结剂（DBA）对预防三氧化矿物凝聚体（MTA）导致牙齿变色的效果。方法。选取50颗牙齿进行根管治疗，去除3毫米的充填材料后分为五组。在白色MTA（WMTA）组和灰色MTA（GMTA）组中，将这些材料置于根管口下方的根管内。在DBA + WMTA组和DBA + GMTA组中，将DBA应用于髓腔。然后，放置3毫米的WMTA和GMTA。最后10颗牙齿作为对照组。所有牙齿均进行修复，并在此时及6个月后记录每个样本的颜色测量值。结果。WMTA组和GMTA组的平均牙齿变色分别显著高于DBA + WMTA组和DBA + GMTA组。DBA + WMTA组和DBA + GMTA组与对照组之间无显著差异。结论。在MTA之前应用DBA可预防牙齿变色。
