title: The influence of premature loss of temporary upper molars on permanent molars.
abstract: OBJECTIVE
  Premature loss of primary molars due to dental caries and their complications has been associated with space loss and eruptive difficulties, especially when the loss occurs early. The aim of our study was to determine the impact of premature loss of temporary upper molars upon the longitudinal axis of the first and second upper permanent molar.
  
  
  METHODS
  The study group included 64 patients 6-9 years old with premature loss of primary molars and a control group of 48 patients with intact temporary teeth. It was evaluated the angle between longitudinal axis of first and second upper permanent molars and occlusal plane. The sofware used is Easy Dent 4 Viewer®.The data were analyzed by using the Statistical Package for the Social Sciences (version 20.0; SPSS, Chicago, III).
  
  
  RESULTS
  It was observed that premature loss of upper second deciduous molars modifies greater the vertical axis of the permanent molars than the premature loss of first upper primary molar. First upper primary molar loss cause an acceleration eruption of first premolar, which will produce a distal inclintion of the both permanent molars.
  
  
  CONCLUSIONS
  The use of space maintainers after premature loss of the second upper temporary molar is a last solution in preventing tridimensional lesions in the dental arch and occlusion.
authors.forename: E R
authors.initials: ER
authors.lastname: Cernei
authors.forename: Dana Cristiana
authors.initials: DC
authors.lastname: Maxim
authors.forename: Irina Nicoleta
authors.initials: IN
authors.lastname: Zetu
mesh_terms: D016022:Case-Control Studies; D002648:Child; D003724:Dental Arch / Q000473:pathology*; D003731:Dental Caries / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000517:prevention & control; D008334:Mandible / Q000473:pathology; D008437:Maxilla / Q000473:pathology; D008963:Molar / Q000473:pathology*; D019516:Orthodontic Space Closure; D011862:Radiography, Panoramic; D014078:Tooth Eruption; D014081:Tooth Extraction / Q000009:adverse effects*; D014085:Tooth Migration / Q000209:etiology; D014094:Tooth, Deciduous / Q000473:pathology*