Nyimi Bushabu Fidele1*, Sekele Isouradi Bourley2, Em Kalala Kazadi3, Mantshumba Milolo Augustin2, Rubina Suwal1, Muyembi Muinamiyi4, Duan Feng1, Guan Jian1
1Unit I, Department of Oral and Maxillofacial Surgery, Second Affiliated Hospital of Jiamusi University,
Jiamusi, China
2Prosthodontics and Orthodontics Service, Affiliated Hospital of Kinshasa University, Kinshasa, DR. Congo
3Unit of Periodontics, Stomatology and Maxillofacial Service, Affiliated Hospital of Kinshasa University,
Kinshasa, DR. Congo
4Unit of Oral Surgery, Stomatology and Maxillofacial Service, Affiliated Hospital of Kinshasa University,
Kinshasa, DR. Congo
Received 29 December 2015; accepted 20 February 2016; published 23 February 2016

Abstract
Aims: The objective of the current research was to determine the prevalence of supernumerary teeth and investigate its characteristic and complications in the Chinese population from the North-East Heilongjiang region. Materials and Methods: It was a descriptive and retrospective study which used registered notes and panoramic radiographs of 12,984 patients who visited the Department of Oral and Maxillofacial Surgery in the 2nd Affiliated Hospital of Jiamusi University, China between June 2011 to November 2015. Patients diagnosed with any syndrome or hereditary
diseases were excluded from the study. The features of supernumerary teeth were noted and the data were analyzed using SPSS program, (version 20, Inc., Chicago, USA). The Chi-square test was used to determine the differences in the distribution of supernumerary teeth. It was tested at
the 5% level of significance. Results: The prevalence was 5.2% and the most prevalent supernumerary teeth was incisor with 3.39% (n = 441). The supernumerary teeth were seen more in maxilla than mandible. The male to female ratio was 2.9:1. Specifically, higher prevalence of supernumerary
teeth in male gender was statistically significant (p = 0.03). The supernumerary teeth mostly occurred in children of 5 – 10 years (62.3%), followed by young adolescent between 11 – 16 years (26.5%). Conclusion: The prevalence of supernumerary teeth was widely seen in children and young adolescent of Chinese population. The occurrence was mostly seen in maxilla than mandible and significantly higher in male than female.
Keywords
Prevalence, Occurrence, Supernumerary Teeth, Features