@article{2991543,
    title = "The influence of matrix type on the proximal contact in class II resin composite restorations",
    author = "Kampouropoulos, D. and Paximada, C. and Loukidis, M. and Kakaboura, A.",
    journal = "Operative Dentistry",
    year = "2010",
    volume = "35",
    number = "4",
    pages = "454-462",
    issn = "0361-7734, 1559-2863",
    doi = "10.2341/09-272-L",
    keywords = "biomedical and dental materials;  dental alloy;  resin;  Spectrum composite resin, article;  chemistry;  classification;  dental care;  dental equipment;  dental surgery;  human;  instrumentation;  materials testing;  molar tooth;  surface property, Composite Resins;  Dental Alloys;  Dental Cavity Preparation;  Dental Materials;  Dental Models;  Dental Restoration, Permanent;  Humans;  Materials Testing;  Matrix Bands;  Molar;  Surface Properties",
    abstract = "Purpose: This in vitro study evaluated the efficiency of various types of matrices in reconstructing the proximal contact area in Class II resin composite restorations. Materials and Methods: Standardized MO cavities were prepared on artificial molars of a manikin model. Resin composite (Spectrum TPH-3) restorations were placed using the following matrices (n = 10): a) circumferential straight metal matrix with Tofflemire retainer-A, b) circumferential pre-contoured metal matrix system-B (Adapt SuperCap), c) circumferential pre-contoured transparent matrix system-C (Adapt SuperCap) and d) sectional precontoured metal matrix system-D (Palodent). After completion of each restoration, the manikin model was fixed on a tension-meter apparatus and an orthodontic wire was used to assess the contact tightness (CT), length of contact arc (LCA) and position of contact point relative to LCA% (PCP). The same measurements were performed on a group of intact molars (REF). The results were statistically analyzed with one-way ANOVA and the Tukey test, as well as the unpaired t-test (α = 0.05). Results: Matrix D provided the highest CT with the highest LCA, which presented a statistical difference relative to the intact tooth. Restorations with matrix B provided higher LCA than those with matrices A and C, which were found to be comparable to that of an intact tooth. The contact points (PCP) of the filled teeth were located more cervically in matrix D relative to the intact tooth (lower PCP), whereas matrices A, B and C showed more occlusal location (higher PCP). Conclusions: Differences were noted among all the matrices evaluated and none was proven sufficient to reconstruct the proximal contact characteristics of an intact tooth."
}