Prevalence and Characteristics of Supernumerary Teeth in Israeli Orthodontic Patients

Background: Supernumerary teeth are one of the most common anomalies in the human dentition, found most frequently in the maxillary anterior region causing impaction or displacement of the adjacent permanent teeth. Aim :The purpose of this retrospective study was to determine the prevalence and characteristics of supernumerary teeth in orthodontically treated patients. Study design: Pre-treatment facial and intraoral photographs, study models, panoramic and periapical radiographs of 3,000 consecutively treated orthodontic patients (mean age 12.2 years) from the Department of Orthodontics Tel Aviv University, were examined to detect supernumerary teeth in both arches. They were recorded according to gender, age, number, location, position and morphology. Results: Thirty-six patients, 22 (61%) males and 14 (39%) females with 50 supernumerary teeth, of which 42 (84%) were found in the maxillary anterior region, and 8 (16%) in the mandible, presenting a prevalence of 1.2%. Conclusions: A prevalence of 1.2% was found in our study. The most common supernumerary tooth is mesiodens located at the maxillary anterior region. The characteristics of supernumeraries were based on their morphology, location and position. The most frequent complications caused were rotations, displacement and arrested eruption of maxillary incisors.

Supernumerary teeth; Prevalence; Characteristics; Orthodontic patients

1. Rajab LD, Hamdan MAM. Supernumerary teeth: review of the literature and a survey of 152 cases. Int J Paediatr Dent; 12(4):244-254. 2002.

2. Mason C, Azam N, Holt RD, Rule DC. A retrospective study of unerupted maxillary incisors associated with supernumerary teeth. Brit J Oral Maxillofac Surg; 38:62-65. 2000.

3. Niswander JD, Sujaku C, Congenital anomalies of teeth in Japanese children. Am J Phys Anthropol; 21:569-574. 1963.

4. Davis PJ. Hypodontia and hyperdontia of permanent teeth in Hong Kong school children. Community Dent Oral Epidemiol; 15:218-220. 1987.

5. Di Biase DD. Midline supernumeraries and eruption of the maxillary central incisor. Dent Practit Dent Rec; 20:35-40. 1969.

6. Garvey MT, Barry HJ, Blake M. Supernumerary teeth: an overview of classification, diagnosis and management. J Can Dent Assoc; 65(11):612- 616. 1999.

7. Hurlen B, Humerfelt D. Characteristics of premaxillary hyperodontia. A radiographic study. Acta Odontol Scand; 43(2):75-81. 1985.

8. Celikoglu M, Kamak H, Oktay H. Prevalence and characteristics of supernumerary teeth in a non-syndrome Turkish population: Associated pathologies and proposed treatment. Med Oral Patol Oral Cir Bucal; 15(4):e575-e578. 2010.

9. Mallineni SK. Supernumerary teeth: Review of the literature with recent updates. Conference papers in Science, Hindawi Publishing Corp. 2014:1-6.

10. Scheiner MA, Sampson WJ. Supernumerary teeth: a review of the literature and four case reports. Austr Dent J; 42:160-165. 1997.

11. Howard RD. The unerupted incisor. A study of the post-operative eruption history of incisors delayed in their eruption by supernumerary teeth. Dent Prac; 17:332-342. 1976.

12. Mitchell L, Bennett TG. Supernumerary teeth causing delayed eruption – a retrospective study. Brit J Orthod; 19:41-46. 1990.

13. Greg TA, Kinirons MJ. The effect of the position and orientation of unerupted premaxillary supernumerary teeth on eruption and displacement of permanent incisors. Int J Pediatr Dent; 1:307-311. 1991.

14. Thawley SE, La Ferriere KA. Supernumerary nasal tooth. Laryngoscope; 87:1770-1773. 1977.

15. Anthonappa RP, King NM, Rabie ABM, Mallineni SK. Reliability of panoramic radiographs for identifying supernumerary teeth in children. Intern J Paediat Dent; 22(1):37-42. 2012.

16. Shapira Y, Haskell BS. Late developing supernumerary premolars. J Clin Orthod;15:571. 1981.

17. Cochrane SM, Clark JR, Hunt NP. Late developing supernumerary teeth in the mandible. Br J Orthod; 24:293-296. 1997.

18. Stevenson W, McKechnie AD. Recurring supernumerary teeth: report of a case. Oral Surg Oral Med Oral Pathol; 40:76-80. 1975.

19. Brook AH. Dental anomalies of number, form and size: their prevalence in British school children. J Intern Assoc Dent Child;5(2):37-53. 1974.

20. Kuchler EC, Costa AG, Costa Mde C, Vieira AR, Granjeiro JM. Supernumerary vary depending on gender. Brazil Oral Res; 25:76-79. 2011.

21. Zilberman Y, Malron M, Shteyer A. Assessment of 100 children in Jerusalem with supernumerary teeth in the premaxillary region. J Dent Child; 59(1):44-47. 1992.

22. So LL. Unusual supernumerary teeth. Angle Orthod; 60:289-292. 1990.

23. Mitchell L. Supernumerary teeth. Dental Update ; 16(2):65-68. 1989.

24. Clayton JM, Congenital dental anomalies occurring in 3,557 children. J Dent Child; 23:206-208. 1956.

25. Backman B, Wahlin YB. Variations in number and morphology of permanent teeth in 7-year-old Swedish children. Intern J Paediat Dent; 11(1):11-17.2001.

26. Brook AH. A unifying aetiological explanation for anomalies of human tooth number and size. Arch Oral Biol;29(5):373-378. 1984.

27. Brook AH, Elcock C. al-Sharood MH, McKeown HF, Khalaf K,Smith RN. Further studies of a model for the etiology of anomalies of tooth number and size in humans. Connect Tissue Res; 43(2-3): 289-295. 2002.

28. Dewinter G, Quirynen M, Heidbuchel K, Verdonck A, Willems G, Carels C. Dental abnormalities, bone graft quality, and periodontal conditions in patients with unilateral cleft lip and palate at different phases of orthodontic treatment. Cleft Palate Craniofac J; 40(4): 343-350. 2003.

29. Frame K, Evans RI. Progressive development of supernumerary teeth in cleidocranial dysplasia. Br J Orthod; 16:103-106. 1989.

30. Koch H, Schwartz O, Klausen B. Indications for surgical removal of supernumerary teeth in the premaxilla. Int J Oral Maxillofac Surg ;15: 273-281.1986.