The relationship between overjet size and dentoalveolar compensation.
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.
Soliman
Nadia Lashin
NL
Department of Oral Medicine and Dental Surgery Research, National Research Centre, 33, El-Tahrir St., Dokki, Cairo, Egypt. nadialsoliman@hotmail.com
El-Batran
Mona Mahmoud
MM
Abou-Zeid
Ahmed Wael
AW
Sarry El-Din
Azza Mohamed
AM
Zaki
Moushira Erfan
ME
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