Objectives: This study investigated selected mechanical properties of an experimental temporary crown and bridge material in comparison to four commercially available provisional materials.
Methods: Five materials were selected to conduct a three-point flexural test to determine flexural strength (FS, n=15, 25x2x2mm) comparable to DIN EN ISO 4049 and modulus of elasticity (ME, n=15, 25x2x2mm) using a universal testing machine (Z2.5/TN1S, Zwick).Compressive strength (CS, n=10, 6x4mm) was measured according to DIN EN ISO 3107, diametral tensile strength (DTS, n=10, 3x6mm) according to ADA Specification No.27 using a universal testing maschine (Z010/TN2A, Zwick). Impact strength (IS, n=10, 50x6x4mm) was measured according to Charpy DIN EN ISO 179-1 and DIN53453 (5102, Zwick). The materials used were Luxatemp Fluorescence (LTF, DMG), Protemp 4 (PT4, 3M Espe), PreVision CB (PVCB, Heraeus), Tempofit Premium (TFP, Detax) and an experimental material (EXP, Kettenbach). Data were examined by One-way ANOVA and Tukey's test (p<0.05).
Results: Table shows Mean±SD, superscript letters represent statistically equivalent means for each property measured.
Material | FS [MPa] | ME [MPa] | IS [kJ/m²] | CS [MPa] | DTS [MPa] |
LTF | 98.9±7.2ab | 2517±102a | 9.9±3.2ab | 282.5±16.8c | 28.8±1.9b |
PT4 | 92.5±7.1ab | 2262±66b | 9.5±1.5ab | 390.3±43.8a | 37.6±6.8a |
EXP | 94.7±6.1ab | 2235±56b | 10.9±2.2a | 345.4±28.7ab | 36.9±6.6a |
PVCB | 67.0±9.3c | 1668±90c | 8.6±1.7ab | 282.8±16.8c | 28.3±2.3b |
TFP | 87.3±8.8b | 2595±189a | 7.7±1.8b | 312.0±49.8bc | 39.0±6.7a |
Conclusion: According to the results of this study, the mechanical properties of EXP show significantly high values for flexural strength, impact strength, compressive strength and diametral tensile strength as they are achieved by several commercially available provisional materials.
Supported by AiF-Government Grant.