Buergers, Ralf and Hahnel, Sebastian and Reischl, Udo and Mueller, Rainer and Rosentritt, Martin and Handel, Gerhard and Behr, Michael (2009) Streptococcal adhesion to various luting systems and the role of mixing errors. ACTA ODONTOLOGICA SCANDINAVICA, 67 (3): PII 908976. pp. 139-145. ISSN 0001-6357, 1502-3850
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Objective. This study aims at ranking various luting systems according to their susceptibility to adhering Streptococcus mutans and at evaluating the influence of incongruent mixing ratios on adhesion quantities. Material and Methods. Circular specimens measuring 8 mm in diameter were made of nine widely used dental cementsthree of them mixed in different ratiosand then incubated with S. mutans. Adhering streptococci were quantified using a biofluorometric assay in combination with an automated plate reader for cell quantification. Surface roughness (Ra) was determined by perthometer measurements. Results. Meron plus revealed the highest Ra (0.90m) and glass the lowest Ra (0.01m). In regular cement mixtures, the highest mean fluorescence intensities indicated the presence of many viable bacteria [Meron Plus (35,533 relative fluorescence units (rfu)), Maxcem (13,374 rfu), and Panavia F 2.0 (11,701 rfu)]. Moderate fluorescence intensities were found in Harvard (4,171 rfu), Ketac cem (3,766 rfu), Durelon (3,276 rfu), Calibra (3,259), Rely X Unicem (4,358 rfu), and Bifix SE (3,102 rfu). A medium correlation between Ra and S. mutans adhesion was found. Changes in regular cement proportions (powder/liquid and base/catalyst, respectively) had a significant influence on relative fluorescence intensities, which linearly increased with a higher proportion of liquid in Harvard and with a higher proportion of catalyst in Calibra and Maxcem. Conclusions. Various luting systems revealed considerable differences in their potential to adhere S. mutans. Variations from recommended cement proportions led to significant changes in the amount of adhering streptococci.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MODIFIED GLASS-IONOMER; RESTORATIVE MATERIALS; POWDER/LIQUID RATIO; DENTAL CEMENT; MUTANS; BACTERIA; BIOFILM; Bacterial adhesion; cements; fluorescence; mixing errors; Streptococcus mutans |
| Subjects: | 500 Science > 540 Chemistry & allied sciences 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Medizinische Mikrobiologie und Hygiene Medicine > Lehrstuhl für Zahnärztliche Prothetik Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Oct 2020 11:18 |
| Last Modified: | 07 Oct 2020 11:18 |
| URI: | https://pred.uni-regensburg.de/id/eprint/29598 |
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