title: The relationship between overjet size and dentoalveolar compensation.
abstract: BACKGROUND
  The purpose of this study was to investigate the effect of overjet size and the dento-alveolar compensation in subjects with normal class I molar relationship.
  
  
  METHODS
  Lateral cephalometric head records of 59 Egyptian children (34 boys and 25 girls) aged 7.5 to 10.5 years with mean age of 8.69+/-0.73. All had normal class I type of occlusion. The sample was classified into four quartiles according to the overjet size and the cephalometric analysis was based on seven linear and eight angular measurements using a dental tracer programme.
  
  
  RESULTS
  showed that, in spite of presence of high significant over jet size differences between the groups; there was no significant differences in all the studied parameters were found. Applying the least significant differences (LSD) test and coefficient correlations between the studied parameters clarifying that there was a significant differences in angular measurements (SN-AB, SN-Occl, I-I, I-ML, I-NB).
  
  
  CONCLUSIONS
  during transitional dentition there was a sufficient dento-alveolar adaptation to growth changes in the saggittal jaw relation ship to attain normal class I type of occlusion. This compensation is pronounced in angular parameters and clustered in the lower arches particularly in incisal area.
authors: Department of Oral Medicine and Dental Surgery Research, National Research Centre, 33, El-Tahrir St., Dokki, Cairo, Egypt. nadialsoliman@hotmail.com
authors: Nadia Lashin
authors: NL
authors: Soliman
authors: Mona Mahmoud
authors: MM
authors: El-Batran
authors: Ahmed Wael
authors: AW
authors: Abou-Zeid
authors: Azza Mohamed
authors: AM
authors: Sarry El-Din
authors: Moushira Erfan
authors: ME
authors: Zaki
mesh_terms: D000539:Alveolar Process / Q000033:anatomy & histology; D002508:Cephalometry / Q000379:methods*; D002648:Child; D003724:Dental Arch / Q000033:anatomy & histology; D003766:Dental Occlusion; D003818:Dentition, Mixed; D005260:Female; D006801:Humans; D007180:Incisor / Q000033:anatomy & histology; D007574:Jaw Relation Record; D008297:Male; D008334:Mandible / Q000033:anatomy & histology; D008437:Maxilla / Q000033:anatomy & histology; D008445:Maxillofacial Development / Q000502:physiology*; D008963:Molar / Q000033:anatomy & histology; D009295:Nasal Bone / Q000033:anatomy & histology; D010159:Palate / Q000033:anatomy & histology; D012658:Sella Turcica / Q000033:anatomy & histology