title: Light cola drink is less erosive than the regular one: an in situ/ex vivo study.
abstract: OBJECTIVE
  This in situ/ex vivo study assessed the erosive potential of a light cola drink when compared to a regular one.
  
  
  METHODS
  During 2 experimental 14-days crossover phases, eight volunteers wore palatal devices with 2 human enamel blocks. The groups under study were: group light, erosive challenge with light cola drink and group regular, erosive challenge with regular cola drink. During 14 days, erosive challenges were performed extraorally 3X/day. In each challenge, the device was immersed in 150ml of light cola (group light) or regular cola (group regular) for 5min. Erosion was analysed by surface profilometry (microm) and surface microhardness change (%SMH). The data were statistically analyzed using paired t test (p<0.05).
  
  
  RESULTS
  Group light (0.6+/-0.2microm) showed significantly lesser wear than group regular (3.1+/-1.0microm). There was no significant difference between the groups for the %SMH (group light -63.9+/-13.9 and group regular -78.5+/-12.7).
  
  
  CONCLUSIONS
  The data suggest that the light cola drink is less erosive than the regular one.
authors.affiliation: Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75, Bauru, SP 17012-101, Brazil. daniriosop@yahoo.com
authors.forename: Daniela
authors.initials: D
authors.lastname: Rios
authors.forename: Heitor Marques
authors.initials: HM
authors.lastname: Honório
authors.forename: Ana Carolina
authors.initials: AC
authors.lastname: Magalhães
authors.forename: Annette
authors.initials: A
authors.lastname: Wiegand
authors.forename: Maria Aparecida
authors.initials: MA
authors.lastname: de Andrade Moreira Machado
authors.forename: Marília Afonso Rabelo
authors.initials: MA
authors.lastname: Buzalaf
mesh_terms: D000328:Adult; D002118:Calcium / Q000032:analysis; D002253:Carbonated Beverages / Q000009:adverse effects* / Q000032:analysis / Q000145:classification; D018592:Cross-Over Studies; D003743:Dental Enamel / Q000473:pathology; D044622:Dental Pellicle / Q000502:physiology; D005459:Fluorides / Q000032:analysis; D006244:Hardness; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010758:Phosphorus / Q000032:analysis; D014077:Tooth Erosion / Q000209:etiology*; D055815:Young Adult
chemical_list: D010758:Phosphorus; D005459:Fluorides; D002118:Calcium