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  Zanko J Med Sci:  Aug. 2017; 21 (2): 1751-1756

Prevalence of hypodontia of permanent dentition in a sample of orthodontic patients In Erbil City: An orthopantomograph study

Rebin Ali Mohammed Amin*, Omar Fawzi Abduljabbar*, Muhammad Husain Saleh*

 
* Department of P.O.P, College of Dentistry, Hawler Medical University, Erbil, Iraq.
 


Abstract

Background and objective: Developmentally missing teeth include hypodontia, oligodontia, and anodontia. In the case of absence of one or more teeth or supernumerary one, the need for treatment is very great. Aesthetic concerns, periodontal diseases and malocclusion are some of the complications following hypodontia. This study aimed to find out the prevalence and distribution of hypodontia in Erbil orthodontic patients in relation to the side, jaw, tooth types and gender.

Methods: Orthopantomograms of 600 patients (10-34 years old), seeking orthodontic treatment from different orthodontic clinics in Erbil city between 2014 and 2015 were evaluated. A tooth diagnosed as congenitally missing when cannot be identified or discerned radiographically on the basis of calcification and there is no evidence of extraction.

Results: The prevalence of hypodontia was 6.66%. Maxillary lateral incisors were most frequently missing (42.68%), followed by mandibular second premolars (19.51%). Hypodontia was more frequently found in females with no statistically significant difference. 62.5% of hypodontia located in maxilla while 27.5% located in the mandible and only 10% was in both arches in the same patient.

Conclusion: The pattern and prevalence of hypodontia are different among races and ethnic groups. The prevalence of hypodontia in Erbil orthodontic patients was 6.6%. Upper lateral incisor was the most frequently missing teeth. Tooth agenesis in the upper arch was more prevalent than in the lower arch.

Keywords: Hypodontia; Supernumerary; Orthopantomograph.



Reference

1. Karadas M, Celikoglu M, Akdag MS, Evaluation of tooth number anomalies in asubpopulation of the North‑East of Turkey. Eur J Dent 2014: 8(3); 337-41.

2. Arte S. Phenotypic and genotypic features of familial hypodontia, PhDThesis, Institute of Dentistry, University of Helsinki, Finland; 2001.

3. Helton AT, Hobson RS, Slater D. A preliminary evaluation of pre-treatment hypodontia patients using the Dental Aesthetic Index. How does it compare with other commonly used indices? Eur J Orthod2008; 30: 244-8.

4. Mattheeuws N, Dermaut L, Martens G. Has hypodontia increased in Caucasians during the 20th century? A meta-analysis. Eur J Orthod 2004; 226:99–103. 

5. Amini F, Rakhshan V, Babaei P. Prevalence and pattern of hypodontia in the permanent dentition of 3374 Iranian orthodontic patients. Dent Res J 2012;9:245–50.

6. Acharya PN, Jones SP, Moles D, Gill D, Hunt NP. A cephalometric study to investigate the skeletal relationships in patients with increasing severity of hypodontia.  Angle Orthod 2010; 80:511–8.

7. Kavadia S, Papadiochou S, Papadiochos I, Zafiriadis L. Agenesis of maxillary lateral incisors: A global overview of the clinical problem. Orthodontics (Chic) 2011; 12:296–317. 

8. Silva Meza R. Radiographic assessment of congenitally missing teeth in orthodontic patients. Int J Pediatr Dent2003; 13:112–6. 

9. Pemberton TJ, Das P, Patel PI. Hypodontia: Genetics and future perspectives. Braz J Oral Sci 2005; 4:695–709.

10. Kokich VG, Kokich VO. Congenitally missing mandibular second premolars: Clinical options. Am J Orthod Dentofacial Orthop 2006; 130:437-44.

11. Sisman Y, Uysal T, Gelgor IE. Hypodontia, Does the Prevalence and Distribution Pattern Differ in Orthodontic Patients? Eur J Dent 2007; 1: 167–73. 

12. Chung CJ, Han JH, Kim KH. The pattern and prevalence of hypodontia in Koreans. Oral Dis2008; 14:620–5.

13. Polder BJ, Van’t Hof MA, Van der Linden FP, Kuijpers-Jagtman AM. A meta-analysis of the prevalence of dental agenesis of permanent teeth. Community Dent Oral Epidemiol 2004; 32:217–26.

14. Goya HA, Tanaka S, Maeda T, Akimoto Y. An orthopantomographic study of hypodontia in permanent teeth of Japanese pediatric patients. J Oral Sci 2008; 50:143–50. 

15. De Coster PJ, Marks LA, Martens LC, Huysseune A. Dental agenesis: Genetic and clinical perspectives. J Oral Pathol Med 2009; 38:1–17.

16. Uslu OAkcam MOEvirgen SCebeci I. Prevalence of dental anomalies in various malocclusions. Am J Orthod Dentofacial Orthop 2009; 135(3):328-35.

17. Endo T, Ozoe R, Yoshino S, Shimooka S. Hypodontia patterns and variations in craniofacial morphology in Japanese orthodontic patients. Angle Orthod 2006; 76:996–1003.

18. Giedrė Trakinienė, Monika Ryliškytė, Aurelija Kiaušaitė. Prevalence of teeth number anomalies in orthodontic patient. SBDMJ 2013; 15: 47-53.

19. Vahid-Dastjerdi E, Borzabadi-Farahani A, Mahdian M, Amini N. Non-syndromic hypodontia in an Iranian orthodontic population. J Oral Sc 2010; 52(3):455-61.

20. Medina AC. Radiographic study of prevalence and distribution of hypodontia in a pediatric orthodontic population in Venezuela. Pediatr Dent 2012; 34(2):113-6.

21. Gomes RR, da Fonseca JA, Paula LM, Faber J, Acevedo AC. Prevalence of hypodontia in orthodontic patients in Brasilia, Brazil. Eur J Orthod 2010; 32:302–6.

22. Altug-Atac AT, Erdem D. Prevalence and distribution of dental anomalies in orthodontic patients. Am J Orthod Dentofacial Orthop 2007; 131:510-4.

23. Gabris K, Fabian G, Kaan M, Rozsa N, Tarjan I. Prevalence of hypodontia and hyperdontiain paedodonticand orthodontic patients in BUdapest. Community Dent Health 2006; 23:80-2.

24. Kositbowornchai S, Keinprasit Ch,Poomat N. Prevalence and distribution of dental anomalies in pretreatment orthodontic Thai patient. KDJ2010; 13 (2): 92-199.

25. Behr M, Proff P, Leitzmann M, Pretzel M, Handel G, Schmalz G, et al. Survey of congenitally missing teeth in orthodontic patients in Eastern Bavaria. Eur J Orthod 2011; 33:32–6.

26. Vani NV, Saleh SM, Tubaigy FM, Idris AM. Prevalence of developmental dental anomalies among adult population of Jazan, Saudi Arabia. SJDR 2016; 7(1): 29–33.

27. Fekonja A. Hypodontia in orthodontically treated children. Eur J Orthod 2005; 27:457–60.

28. Bäckman B, Wahlin Y B. Variations in number and morphology of permanent teeth in 7-year-old Swedish children. Int J Paediat Dent 2001; 11(1): 11–7.

29. Kapdan A, Kustarci A, Buldur B, Arslan D, Kapdan A. Dental anomalies in the primary dentition of Turkish children. Eur J Dent 2012; 6:178–83. 

30. Gábris K, Fábián G, Kaán M, Rózsa N, Tarján I. Prevalence of hypodontia and hyperdontia in paedodontic and orthodontic patients in Budapest. Community Dent Health 2006; 23: 80–2.

 31. Farhat A. Prevalence of hypodontia in orthodontic patients in a Pakistan sample- a study. Pak Oral Dent J 2010; 30:142-5.