Oral Biology and Dentistry

Oral Biology and Dentistry

ISSN 2053-5775
Original Research

A retrospective study of root apices closure of permanent incisors and first molars in Tanzanian children’s digital Orthopantomographs

Twalha Hamisi Mituro1†, Emeria Abella Mugonzibwa2* and Febronia Kokulengya Kahabuka2†

* Correspondence: Emeria Abella Mugonzibwa mugonzibwamwanga@gmail.com

† These authors contributed equally to this work.

1. Dental Department, Muhimbili National Hospital, Dar es Salaam, Tanzania.

Author Affiliations

2.Department of Orthodontics, Paedodontics and Community Dentistry, Muhimbili University of Health and Allied Sciences (MUHAS), Dar es Salaam, Tanzania.


Background: Development status of the root apices of permanent teeth is important in various dental disciplines, paediatrics, endocrinology and forensic dentistry.

Aim: To assess the root apices closure of permanent incisors and first molars among Tanzanian children aged 6-15 years.

Methods: A hospital based, retrospective cross sectional study involving 321 digital Orthopantomographs. Chi square test was employed to test significant differences.

Results: At 6-7.99 and 8-9.99 years, 20-21.4% and 66% of root apices of the mandibular central incisors had closed, respectively. At 8-11.99 years, 69% of the maxillary right first molars in males had apices closed compared to 47% in females (p<0.05). At 8-11.99 years, 84% of the mandibular central incisors had apices closed compared to 63% of maxillary ones (p<0.001).

Conclusion: Permanent incisor and first molar root apices’ closure in Tanzanian sample seem to be early being in agreement with the permanent teeth emergence pattern reported earlier among Tanzanian children.

Keywords: Apex closure, permanent incisors, permanent first molars, Tanzania

ISSN 2053-5775
Volume 6
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