Protective effect of green tea on dentin erosion and abrasion.
OBJECTIVE
This in situ study evaluated the protective effect of green tea on dentin erosion (ERO) and erosion-abrasion (ABR).


METHODS
Ten volunteers wore intraoral palatal appliances with bovine dentin specimens subjected to ERO or ERO + toothbrushing abrasion performed immediately (ERO+I-ABR) or 30 min after erosion (ERO+30-min-ABR). During 2 experimental 5-day crossover phases, the volunteers rinsed with green tea or water (control, 1 min) between each erosive (5 min, cola drink) and abrasive challenge (30 s, toothbrushing), 4x/day. Dentin wear was measured by profilometry.


RESULTS
The green tea reduced the dentin wear significantly for all conditions compared to control. ERO+I-ABR led to significantly higher wear than ERO, but it was not significantly different from ERO+30-min-ABR. ERO+30-min-ABR provoked significant higher wear than ERO, only for the placebo treatment.


CONCLUSIONS
From the results of the present study, it may be concluded that green tea reduces the dentin wear under erosive/abrasive conditions.
Kato
Melissa Thiemi
MT
University of São Paulo, Bauru, SP, Brazil.
Magalhães
Ana Carolina
AC
Rios
Daniela
D
Hannas
Angélica Reis
AR
Attin
Thomas
T
Buzalaf
Marília Afonso Rabelo
MA
D000328:Adult; D000818:Animals; D002253:Carbonated Beverages / Q000009:adverse effects; D002417:Cattle; D018592:Cross-Over Studies; D003804:Dentin / Q000473:pathology; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D020011:Protective Agents / Q000627:therapeutic use*; D013662:Tea; D014072:Tooth Abrasion / Q000517:prevention & control*; D014077:Tooth Erosion / Q000517:prevention & control*; D014099:Toothbrushing / Q000295:instrumentation; D014867:Water; D055815:Young Adult
D020011:Protective Agents; D013662:Tea; D014867:Water