title: Occlusal fossae depth of permanent first molars assessed by visual examination: an in vitro approach.
abstract: OBJECTIVE
  Sealant placement commonly is employed in molars with deep fissures to protect the teeth from occlusal caries. Some have advocated the some preventive approach for deep occlusal fossae in permanent molars. The decision of whether or not to place a sealant depends largely on the dentist's assessment of the depth of the occlusal fossae. The purposes of this in vitro study were to: (1) evaluate the morphology and determine the actual depth of occlusal fossae from newly erupted permanent first molars; (2) compare them with depth assessments obtained from visual examination, and (3) characterize how pediatric dentists look at the occlusal surfaces to assess fossae depth.
  
  
  METHODS
  Fossa depth of 48 intact permanent molars was measured by a computerized micromeasurement system (Michigan Laser Digitizer) and compared with the depth assessed during a bench-top examination conducted by a panel of pediatric dentists.
  
  
  RESULTS
  The computerized and visual measurements were positively and significantly correlated (r=0.64, P<.001). Agreement as measured by the Kappa statistic was moderate (k=0.46; 95% confidence interval=0.22-0.71; P<.001).
  
  
  CONCLUSIONS
  Pediatric dentists' perception of fossa depth in permanent molars correlates moderately well with the actual fossa depth.
authors.affiliation: Department of Orthodontics and Pediatric Dentistry, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA. aarruda@umich.edu
authors.forename: Airton O
authors.initials: AO
authors.lastname: Arruda
authors.forename: Ana Cristina B
authors.initials: AC
authors.lastname: Bezerra
authors.forename: Lloyd H
authors.initials: LH
authors.lastname: Straffon
mesh_terms: D002648:Child; D003657:Decision Making; D003743:Dental Enamel / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D007834:Lasers; D008297:Male; D003765:Models, Dental; D008963:Molar / Q000033:anatomy & histology*; D010377:Pediatric Dentistry; D015203:Reproducibility of Results; D014796:Visual Perception