title: AXIAL MODIFICATIONS OF PERMANENT LOWER MOLARS AFTER PREMATURE LOSSES OF TEMPORARY MOLARS.
abstract: OBJECTIVE
  The aim of our study was to determine the impact of premature loss of temporary lower molars upon the longitudinal axis of the first and second permanent molars.
  
  
  METHODS
  The study groups included 61 patients, 6-9 year olds with premature loss of primary molars and a control group of 24 patients with intact temporary teeth. We evaluated the angle between longitudinal axis of first and second lower permanent molars and occlusal plane.
  
  
  RESULTS
  It was observed that premature loss of lower second deciduous molar modifies more the vertical axis of first and second permanent molars than the premature loss of first lower primary molar. Reducing space occurs mainly through mesial inclination of molars that separates the edentulous breach. Temporary loss of both lower first molars on the same quadrant causes an accelerated eruption of both premolars increasing the prevalence of eruption sequence: "4-5-3-7".
  
  
  CONCLUSIONS
  The preservation of the occlusal morpho-functional complex using space maintainers mainly when the premature loss of the second primary molars occurs is the best interceptive treatment option.
authors.forename: E R
authors.initials: ER
authors.lastname: Cernei
authors.forename: R B
authors.initials: RB
authors.lastname: Mavru
authors.forename: Irina Nicoleta
authors.initials: IN
authors.lastname: Zetu
mesh_terms: D016022:Case-Control Studies; D002648:Child; D003724:Dental Arch / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000517:prevention & control*; D008334:Mandible / Q000473:pathology*; D008963:Molar / Q000473:pathology; D011862:Radiography, Panoramic / Q000379:methods; D014078:Tooth Eruption; D014079:Tooth Eruption, Ectopic / Q000209:etiology; D014085:Tooth Migration / Q000209:etiology; D014094:Tooth, Deciduous / Q000473:pathology