Objectives: The aim of this study was to evaluate different zinc carboxylate cements experimental formulations (ZCC) according with requirements of compressive strength (CS), film thickness (FT) and setting time (ST) tests. Methods: Five experimental formulations were used following three stages: 5 powders and 8 liquids, in addition to 5 commercial liquids. Stages: 1st According with the test mentioned above 5 commercial liquids (PCA Medental [Medental], Durelon [ESPE], Prothoplast [Prothoplast], Carboxylate [S. S. White] and Harvard CC [Harvard Dental GmbH]) and a control powder formulation (CPF), made up by ZnO, MgO, BiO3 and Al2O3, were evaluated. 2nd CPF with eight experimental liquids: four basic formulations [A1: acrylic-itaconic-maleic copolymer: AIM-C; B1: acrylic-itaconic copolymer: AI-C; C1: acrylic-maleic copolymer: AM-C; D1: poly (acrylic acid): PAA] and four more formulations with the addition of tartaric acid (A2: AIM-C, B2: AI-C, D2: PAA). 3rd Four different types of CPF were developed by adding: criolite (F1), Al2O3 (F2), criolite + Al2O3 (F3) and F3 with mesh 400 particle size (F4).
Data were analyzed using Dunn's and Kruskal-Wallis test.
Results: FT: H=44.380** ST: H=50.978** CS: H=70.523**
|
Test |
Statistically different |
No statistically different |
|
FT (microns) |
F4 &F2, F4 & A4 |
A2 & Durelon, Harvard CC & F4 |
|
ST (min) |
Durelon & C1, Prothoplast & B1, Prothoplast & F3, Prothoplast & Durelon |
Durelon & C2, Prothoplast & C1, F2 & B1 |
|
CS (MPa) |
PCA Medental & F4, F3 & F2, *B2 with all except: D2 |
F4 & F1, A1 & PCA Medental, D2 & B1 |
Conclusion: Adding crioliteand Al2O3 to mesh 400-particle size control formulation improved compressive strength (124.58 MPa), film thickness(30.6 m) and setting time (5.416 minutes) values.