Abstract
Introduction: Maxillary lateral incisor is a common congenitally missing tooth in the oral cavity. Maxillary lateral incisor is also the most common varying tooth in form than any other tooth. The objective of the study is to estimate the prevalence of congenitally missing maxillary lateral incisors and peg laterals in patients receiving orthodontic treatment.
 Materials & Method: This is a cross sectional retrospective study carried out among 204 orthodontic patients. Panoramic radiographs taken during the diagnostic procedure of orthodontic treatment was used to confirm the presence or absence of lateral incisors. The presence of peg laterals was determined by dental casts.
 Result: Prevalence of missing maxillary lateral incisors and peg laterals was found 2.5% and 3.9% respectively. Prevalence of missing lateral in male was 5.7% while among female no missing laterals were observed. Prevalence of peg laterals in male and female was 1.1% and 6% respectively. Among the missing lateral incisors, prevalence of bilaterally missing lateral incisors was 60% while prevalence of both right and left unilateral missing laterals was 20%. Among the peg laterals, bilateral peg laterals were present in 50% patients, followed by left unilateral 37.5% and right unilateral 12.5% peg laterals.
 Conclusion: The present study shows higher prevalence of peg laterals than missing lateral incisors. Prevalence of missing lateral incisors was higher in male and prevalence of peg laterals was higher in female. Prevalence of bilaterally missing laterals and bilateral peg laterals was higher than unilateral presentation.
Highlights
Maxillary lateral incisor is a common congenitally missing tooth in the oral cavity
The present study shows higher prevalence of peg laterals than missing lateral incisors
Prevalence of missing lateral incisors was higher in male and prevalence of peg laterals was higher in female
Summary
Maxillary lateral incisor is a common congenitally missing tooth in the oral cavity. Maxillary lateral incisor is the most common varying tooth in form than any other tooth. Ectodermal dysplasia, conditions such as rickets, syphilis and expression of evolutionary changes in the dentition.[4,5] Face and jaws tend to decrease in the anteroposterior direction with the evolution of species This trend can limit the space needed to accommodate all of the teeth and, the last tooth of each series tends to disappear (third molars, second premolars and lateral incisors). This is a hereditary process: a generation that has an anomalous tooth (small sized maxillary lateral incisors/ peg-shaped lateral incisors) will have descendants that no longer possess this tooth.[5] Tooth agenesis may occur in the form of an isolated familial or sporadic anomaly or in association with other genetic diseases like Cleft lip/palate, Down syndrome, Van der Woude syndrome, Ectodermal dysplasia, Hypohidrotic dysplasia, Incontinenita pigment, Witkop syndrome, Rieger syndrome, Holoprosencephaly. The mutations in genes responsible for tooth development are marked as PAX9 and MSX1.6-8
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
