Effect of handling, time of use and photoactivation on the contamination of dental composite resins
Acta sci., Health sci
;
44: e57616, Jan. 14, 2022.
Article
in English
| LILACS
| ID: biblio-1366131
ABSTRACT
This study evaluated the effect of contamination of composite resins (CRs) handled by undergraduate students during restorative procedures, varying the time (baseline, 30 days and 60 days) and experimental condition (before and after handling, contamination with saliva [positive control] and photoactivation). Eight CR tubes were randomly distributed at the dental clinic and the samples were organized into four groups CR fragments collected before (GB) and after (GA) the restorative procedure; CR fragments contaminated with saliva (GS) and photoactivated (GP) both collected after the procedure. These 4 groups were evaluated in 3 different times baseline (after sealing), 30 days and 60 days of use of the CR. Samples that had positive turbidity in Brain HeartInfusion (BHI) broth were sown in BHI and Sabouraud Dextrose (SB) agars for subsequent counting of Colony Forming Units (CFU mL-1). The results showed that the handling was responsible for increasing contamination (p < 0.05) at the baseline (GB [n = 0] and GA [n = 3]), as well as after 30 (GB [n = 1] and GA [n = 6]) and 60 (GB [n = 1] and GA [n = 5]) days of use. Photoactivation was responsible for the reduction for microorganisms in T0 and T60. Additionally, the time use and conservation did not influencethe contamination of CRs. Handling was responsible for the increase of contamination of CR, the photoactivation seems to reduce the number of viable microorganisms and the time of use seems not to potentiate the effect of tube contamination.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Pollution Indicators
/
Composite Resins
/
Good Manipulation Practices
/
Light-Curing of Dental Adhesives
Type of study:
Evaluation studies
Language:
English
Journal:
Acta sci., Health sci
Journal subject:
Medicina
/
Sa£de P£blica
Year:
2022
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Federal da Paraíba/BR
/
Universidade Federal do Ceará/BR
/
Universidade de Pernambuco/BR
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