Influence of varnish application on a tissue conditioner: analysis of biofilm adhesion.
OBJECTIVE
The aim of this study was to evaluate if the use of a varnish on a tissue conditioner would affect biofilm adhesion.


BACKGROUND
After the surgery has been performed, before the delivery of a complete denture, it is often necessary to use materials such as tissue conditioners on the surgical wound. However, these materials present deficient physico-mechanical properties, which allow biofilm development.


METHODS
Forty elderly volunteers wearing complete maxillary dentures were selected. They were randomly allocated into two groups (n = 20), G1 and G2. In both groups, a silicone-based tissue conditioner was placed in a recess created at the base of the denture, according to the manufacturer's guidelines. In group G1, a varnish was applied to the tissue conditioner, while in group G2, no treatment was applied. All volunteers performed daily hygiene of the prosthesis with a soft toothbrush, and toothpaste. Quantification of the mean score values of biofilm formed at different time points (baseline, 1 week and 3 weeks) was statistically analysed using anova (alpha = 0.05).


RESULTS
Group G2 (1.6 +/- 1.2) showed the lowest mean score values of biofilm formation and there was a statistical difference between the groups (p = 0.03). The highest mean score values were found after 3 weeks (2.7 +/- 1.4) and were statistically different from the other time points studied (baseline and 1 week).


CONCLUSIONS
The use of a varnish had a detrimental effect on the tissue conditioner studied, allowing higher biofilm formation.
Boscato
Noéli
N
Department of Prosthodontics, School of Dentistry, West University of Santa Catarina, Santa Catarina, Brazil. noeli@boscatto.com.br
Delavi
Julian Delarozieri
JD
Muller
Leonardo
L
Pereira-Cenci
Tatiana
T
Imanishi
Soraia Watanabe
SW
D000180:Acrylic Resins / Q000737:chemistry; D000368:Aged; D001422:Bacterial Adhesion / Q000502:physiology*; D018441:Biofilms; D002327:Cariostatic Agents / Q000627:therapeutic use; D004396:Coloring Agents; D003764:Dental Materials / Q000737:chemistry*; D003773:Dental Plaque / Q000382:microbiology*; D003819:Denture Bases; D003822:Denture Liners / Q000382:microbiology*; D003827:Denture, Complete, Upper; D005260:Female; D005459:Fluorides / Q000627:therapeutic use; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009499:Neutral Red; D009910:Oral Hygiene; D010795:Phthalic Acids / Q000737:chemistry; D012828:Silicones / Q000737:chemistry; D013499:Surface Properties; D014016:Tissue Conditioning, Dental / Q000379:methods*; D014099:Toothbrushing / Q000295:instrumentation; D014100:Toothpastes / Q000627:therapeutic use; D014753:Vinyl Compounds / Q000737:chemistry
D000180:Acrylic Resins; D002327:Cariostatic Agents; D004396:Coloring Agents; D003764:Dental Materials; D010795:Phthalic Acids; D012828:Silicones; D014100:Toothpastes; D014753:Vinyl Compounds; C043685:Coe Comfort; D009499:Neutral Red; D005459:Fluorides