Biomaterial Database

Variation in time of emergence of permanent teeth among urban and rural Jordanian school children. 2011

Ashraf I Shaweesh, and Mahmoud K Al-Omiri, and Firas D Alsoleihat

Department of Oral Medicine and Oral Surgery, Faculty of Dentistry, Jordan University of Science and Technology, PO Box 3030, Irbid 22110, Jordan. ashrafis@just.edu.jo

OBJECTIVE To investigate the variation in time of permanent tooth emergence between urban and rural Jordanian school children. METHODS In this observational cross-sectional study, 1900 pupils at urban schools, and 772 at rural schools aged 5-16 years in both genders were examined for emergence of permanent teeth at different urban and rural primary schools and kindergartens in Jordan between March and June 2010. Probit analysis was used to estimate the median age of emergence per permanent tooth. RESULTS The emergence ages for most of the permanent teeth were generally advanced in urban schoolboys in contrast to their fellows at rural schools. However, the differences were only statistically significant for the maxillary canine and maxillary premolars. Compared with boys, schoolgirls had smaller variation in permanent tooth emergence across school region, and none of the differences were statistically significant. CONCLUSIONS Urban schoolboys have accelerated emergence of the maxillary canine and maxillary premolars compared to rural boys. The potential etiology behind this finding needs to be investigated further in the future.

UI	MeSH Term	Description	Entries
D007597	Jordan	A country in the MIDDLE EAST, northwest of Saudi Arabia, between Israel and Iraq. The capital is Amman.
D008297	Male		Males
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D002675	Child, Preschool	A child between the ages of 2 and 5.	Children, Preschool,Preschool Child,Preschool Children
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293	Adolescent	A person 13 to 18 years of age.	Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D012424	Rural Population	The inhabitants of rural areas or of small towns classified as rural.	Rural Residence,Rural Communities,Rural Spatial Distribution,Communities, Rural,Community, Rural,Distribution, Rural Spatial,Distributions, Rural Spatial,Population, Rural,Populations, Rural,Residence, Rural,Rural Community,Rural Populations,Rural Residences,Rural Spatial Distributions
D014505	Urban Population	The inhabitants of a city or town, including metropolitan areas and suburban areas.	Urban Residence,Urban Spatial Distribution,Distribution, Urban Spatial,Distributions, Urban Spatial,Population, Urban,Populations, Urban,Residence, Urban,Urban Populations,Urban Residences,Urban Spatial Distributions
D017677	Age Distribution	The frequency of different ages or age groups in a given population. The distribution may refer to either how many or what proportion of the group. The population is usually patients with a specific disease but the concept is not restricted to humans and is not restricted to medicine.	Age Distributions,Distribution, Age,Distributions, Age