title: Longitudinal photographic observation of the occurrence of bubbles in pit and fissure sealants.
abstract: The purpose of this study was to employ photographic evaluation to observe the presence or absence of bubbles in pit and fissure sealants Concise and Prisma Shield, at 7 days, 18 months, 36 months and 11 years after accomplishment of treatment.
  
  
  METHODS
  A hematoxylin-based staining solution was applied to the occlusal surface at the study periods, which allowed assessment of the sealing material on the surface. All occlusal surfaces were photographed and the photographs corresponding to each period were subjected to photographic evaluation.
  
  
  RESULTS
  There was statistically significant difference only at 18 months, with a significantly higher number of specimens with bubbles for the Prisma Shield sealant compared to the Concise, whereas the groups were similar at all other study periods. On the other hand, separate analysis of subsequent periods of the sealants did not reveal any significant difference.
  
  
  CONCLUSIONS
  According to the results of the present longitudinal investigation, it may be concluded that the sealing materials showed that bubbles came into and went out with time. However, this fact did not interfere with its clinical purpose, provided the remaining material covers the expected region of pits and fissures.
authors.affiliation: Department of Restorative Dentistry of Araçatuba Dental School - São Paulo State University - UNESP - Araçatuba, São Paulo, Brazil. sundfeld@terra.com.br
authors.forename: Renato Herman
authors.initials: RH
authors.lastname: Sundfeld
authors.forename: Theodore P
authors.initials: TP
authors.lastname: Croll
authors.forename: Silvio José
authors.initials: SJ
authors.lastname: Mauro
authors.forename: André Luiz Fraga
authors.initials: AL
authors.lastname: Briso
authors.forename: Rodrigo Sversut
authors.initials: RS
authors.lastname: de Alexandre
authors.forename: Maria Lúcia Marçal Mazza
authors.initials: ML
authors.lastname: Sundefeld