Objectives: The aim of this in vitro study was to rank commonly used temporary crown and bridge materials according to their susceptibility to adhere S. mutans.
Methods: Test specimens of each of 11 temporary crown and bridge materials (see Table) were made according to the manufacturer's instructions and polished using wet abrasive paper with a grit of 4000. Glass and composite (Sinfony, 3M ESPE, G) plates were used as references. Surface roughness was determined (Perthometer S6P, Perthen, G) and all specimens were incubated (2,5 hours/ 37°C) with S. mutans. Adherent S. mutans bacteria were marked with fluorescence dye (Resazurin, Sigma, G) and the intensity of fluorescence was verified (Fluostar, bmg, G). Medians and 25/75 percentiles were calculated, statistics: Mann-Whitney U-test (α = 0.05).
Results:
|
System |
Material |
Manufacturer |
Rel. fluor.- intensity |
|
|
|
|
|
|
Bis-acryl composite |
Protemp 3 Garant |
3M Espe |
4273 (2999/5896) |
|
|
Luxatemp Automix |
DMG |
3286 (2809/6296) |
|
|
Temphase |
Kerr |
9488 (7405/11749) |
|
|
Structur premium |
Voco |
8594 (4719/9829) |
|
|
Prevision CB |
Heraeus Kulzer |
7380 (4753/11788) |
|
|
Cronmix K plus |
Merz |
10843 (8056/14644) |
|
Methacrylate |
Cronsin |
Merz |
4321 (2789/7870) |
|
|
Trim |
Bosworth |
8237 (2969/11096) |
|
Acrylic resin |
Snap |
Roeko |
15366 (8753/20901) |
|
|
Unifast LC |
GC |
11115 (8035/18445) |
|
|
|
|
|
|
|
Glass |
Marienfeld |
4644 (4171/11581) |
|
Composite |
Sinfony |
3M Espe |
11516 (5111/14148) |
Conclusion: Protemp 3 Garant, Luxatemp and Cronsin showed comparable bacterial adhesion with the glass control. S. mutans adheres in similar quantities to bis-acryl and methacrylate materials, but slightly favors superior acrylic resin materials.