Prevalence of maxillary lateral incisor agenesis and associated skeletal characteristics in an orthodontic patient population.
OBJECTIVE
This study was aimed to investigate the prevalence of maxillary lateral incisor agenesis and associated skeletal characteristics in an orthodontic patient population.


METHODS
The records of the 1066 patients seeking orthodontic treatment were screened for maxillary lateral incisor agenesis (MLIA). The following data were recorded for each subject: age; gender; unilateral or bilateral agenesis of MLI and side. The lateral cephalogram of each subject with MLIA was digitally traced. The data were compared to age-matched control orthodontic patients with skeletal Class I.


RESULTS
The prevalence of maxillary lateral incisor agenesis was 4.9% (52 patients) in which 63.5% were females. There was a significant difference between MLIA patients and controls in sagittal relationships (ANB, Wits, AB plane, angle of convexity and Co-A/Co-Gn differential analyses) p < 0.05.


CONCLUSIONS
Patients with maxillary lateral incisor agenesis showed a significant tendency for skeletal Class III compared with the Class I control. This could be attributed to maxillary hypoplasia/retrognathia.
a Department of Orthodontics, Faculty of Dentistry , King Abdulaziz University , Jeddah , Saudi Arabia ;
Dalia S
DS
Bassiouny
a Department of Orthodontics, Faculty of Dentistry , King Abdulaziz University , Jeddah , Saudi Arabia ;
Ahmed R
AR
Afify
a Department of Orthodontics, Faculty of Dentistry , King Abdulaziz University , Jeddah , Saudi Arabia ;
Hosam A
HA
Baeshen
b Professor emeritus at University of Gothenburg , Gothenburg , Sweden.
Dowen
D
Birkhed
a Department of Orthodontics, Faculty of Dentistry , King Abdulaziz University , Jeddah , Saudi Arabia ;
Khalid H
KH
Zawawi
D000015:Abnormalities, Multiple / Q000453:epidemiology*; D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D007180:Incisor / Q000002:abnormalities; D008297:Male; D008437:Maxilla; D015995:Prevalence; D013548:Sweden / Q000453:epidemiology; D014071:Tooth Abnormalities / Q000453:epidemiology*; D055815:Young Adult
Agenesis; Class III; cephalometric characteristics; congenitally missing; maxillary lateral incisor