Ayuso-Montero Raul, Martinez-Gomis Jordi, Lujan-Climent Mar, Salsench Juan, Peraire Maria
Department of Prosthodontics, Faculty of Dentistry, University of Barcelona, Spain.
J Prosthodont. 2009 Feb;18(2):141-4. doi: 10.1111/j.1532-849X.2008.00392.x. Epub 2008 Nov 18.
This study evaluated the effect of matrix type on the surface roughness of resins for provisional crowns and fixed partial dentures.
Ninety specimens of two acrylic resins (Trim II, Tab2000) and one bis-acryl composite (Protemp II Garant) were fabricated using one of three matrices: irreversible hydrocolloid (Cavex CA37), poly(vinyl siloxane) (Aquasil) or vacuum-formed matrix (Bio-flow Hard). The sample size for each resin-matrix combination was 10. The vestibular face of one natural maxillary central incisor was used as a model to fabricate all the specimens, following the custom fabrication technique. The average roughness measurements, Ra (mum), were obtained using a profilometer, and the data were analyzed using Kruskal-Wallis and Mann-Whitney U-tests. The results were contrasted against the surface roughness of the tooth using a one-sample t-test.
Aquasil and vacuum-formed matrix had a smoother surface than Cavex CA37 regardless of the resin tested (p < 0.05). Protemp II Garant had the smoothest surface regardless of the matrix used, with no significant differences when polymerized against the three different matrices. Trim II polymerized against Cavex CA37 had a rougher (p < 0.05) surface than Aquasil or vacuum-formed matrix. Tab2000 had the smoothest surface (p < 0.05) when polymerized against a vacuum-formed matrix.
There is no universal matrix that produces the smoothest surface: this depends on the compatibility between the resin and the matrix. Protemp II Garant polymerized against Cavex CA37 matrix yields a surface that is smooth enough not to require polishing unless this surface is adjusted.
本研究评估了基质类型对临时冠和固定局部义齿树脂表面粗糙度的影响。
使用三种基质之一制作了两种丙烯酸树脂（Trim II、Tab2000）和一种双丙烯酸复合树脂（Protemp II Garant）的90个样本：不可逆水胶体（Cavex CA37）、聚（乙烯基硅氧烷）（Aquasil）或真空成型基质（Bio-flow Hard）。每种树脂 - 基质组合的样本量为10个。按照定制制作技术，以一颗天然上颌中切牙的前庭面为模型制作所有样本。使用轮廓仪获得平均粗糙度测量值Ra（μm），并使用Kruskal - Wallis和Mann - Whitney U检验分析数据。使用单样本t检验将结果与牙齿的表面粗糙度进行对比。
无论测试何种树脂，Aquasil和真空成型基质的表面都比Cavex CA37更光滑（p < 0.05）。无论使用何种基质，Protemp II Garant的表面最光滑，在与三种不同基质聚合时无显著差异。与Cavex CA37聚合的Trim II的表面比Aquasil或真空成型基质更粗糙（p <
