Document Type : Original Article

Authors

1 Dept. of Oral & Maxillofacial Radiology, School of Dentistry, Babol University of Medical Sciences, Babol, Iran

2 Dept. of Oral and Maxillofacial Radiology, College of Dentistry, Babol University of Medical Sciences, Mazandaran, Iran.

3 Communicable Pediatric Disease Research Center, Babol University of Medical Sciences, Mazandaran, Iran.

Abstract

Statement of the Problem: Many studies have explored the prevalence of dental anomalies, with conflicting results, possibly attributed to differences in the ethnicities of the populations evaluated. Purpose: The aim of this study was to investigate the prevalence of dental anomalies, using panoramic images, in an Iranian population.Materials and Method: In this cross-sectional study, panoramic radiographs of patients aged 18 years or more, between 2015 and 2017 from three private clinics in Babol and Sari, were evaluated for presence or absence of anomalies (tooth shape, number, structure, and position). Data were analyzed using the chi square test, Student’s t-test, and analyses of variance. In this study, p ≤ 0.05 was considered significant.Results: Of 8018 cases examined, anomalies were found in 2250 cases (28.06%), with 95% confidence intervals of 27.08 - 29.0; one, two, and more than two types of anomalies were observed in 1968 (24.5%), 267 (3.3%), and 15 (0.2%) cases, respectively. Root dilaceration was the most prevalent anomaly (7.7%), followed by dens invaginatus (3.8%). Impaction was observed with a prevalence of 15.2%. Impaction, dens invaginatus, and missing teeth were significantly more prevalent in women than in men, whilst supernumerary teeth and hypercementosis were more common in men than in women (p < 0.05).Conclusion: Regarding the relatively high prevalence of dental anomalies such as root dilacerations and dens invaginatus, it is essential to consider these anomalies carefully in treatment decision-making.Key Words   ● Radiography  ● Anomalies  ● Teeth  ● Prevalence  ● Root 

Keywords

1. Uslu O, Akcam MO, Evirgen S, Cebeci I. Prevalence of dental anomalies in various malocclusions. Am J Orthod Dentofacial Orthop. 2009; 135: 328–335. [PubMed[Google Scholar]
2. Shokri A, Poorolajal J, Khajeh S, Faramarzi F, Kahnamoui HM. Prevalence of dental anomalies among 7- to 35-year-old people in Hamadan, Iran in 2012-2013 as observed using panoramic radiographs. Imaging Sci Dent. 2014; 44: 7–13. [PMC free article] [PubMed[Google Scholar]
3. White SC, Pharoah MJ. Oral radiology: principles and interpretation. 7th ed. St Louis: Mosby Elsevier; 214. p. 582. [Google Scholar]
4. Harris EF, Clark LL. Hypodontia: an epidemiologic study of American black and white people. Am J Orthod Dentofacial Orthop. 2008; 134: 761–767. [PubMed[Google Scholar]
5. Kositbowornchai S. Prevalence and distribution of dental anomalies in pretreatment orthodontic Thai patients. Khon Kaen Univ Dent J. 2010; 13: 92–100. [Google Scholar]
6. Kapdan A, Kustarci A, Buldur B, Arslan D, Kapdan A. Dental anomalies in the primary dentition of Turkish children. Eur J Dent. 2012; 6: 178–183. [PMC free article] [PubMed[Google Scholar]
7. Patil S, Doni B, Kaswan S, Rahman F. Prevalence of dental anomalies in Indian population. J Clin Exp Dent. 2013; 5: e183–e186. [PMC free article] [PubMed[Google Scholar]
8. Gupta SK, Saxena P, Jain S, Jain D. Prevalence and distribution of selected developmental dental anomaliesin an Indian population. J Oral Sci. 2011; 53: 231–238. [PubMed[Google Scholar]
9. Afify AR, Zawawi KH. The prevalence of dental anomalies in the Western region of saudi arabia. ISRN Dent. 2012; 2012: 837270. [PMC free article] [PubMed[Google Scholar]
10. Rakhshan V. Congenitally missing teeth (hypodontia): A review of the literatureconcerning the etiology, prevalence, risk factors, patterns and treatment. Dent Res J (Isfahan) 2015; 12:1–13. [PMC free article] [PubMed[Google Scholar]
11. Amini F, Rakhshan V, Babaei P. Prevalence and pattern of hypodontia in the permanent dentition of 3374Iranian orthodontic patients. Dent Res J (Isfahan) 2012; 9: 245–250. [PMC free article] [PubMed[Google Scholar]
12. Muller TP, Hill IN, Peterson AC, Blayney JR. A survey of congenitally missing permanent teeth. J Am Dent Assoc. 1970; 81: 101–107. [PubMed[Google Scholar]
13. Nabavizadeh M, Sedigh Shamsi M, Moazami F, Abbaszadegan A. Prevalence of root dilaceration in adult patients referred to Shiraz dentalschool (2005-2010) J Dent (Shiraz) 2013; 14: 160–164. [PMC free article] [PubMed[Google Scholar]
14. Ezoddini AF, Sheikhha MH, Ahmadi H. Prevalence of dental developmental anomalies: a radiographic study. Community Dent Health. 2007; 24: 140–144. [PubMed[Google Scholar]
15. Fardi A, Kondylidou-Sidira A, Bachour Z, Parisis N, Tsirlis A. Incidence of impacted and supernumerary teeth-a radiographic study in a North Greek population. Med Oral Patol Oral Cir Bucal. 2011; 16: e56–e61. [PubMed[Google Scholar]
16. Kramer RM, Williams AC. The incidence of impacted teeth. A survey at Harlem hospital. Oral Surg Oral Med Oral Pathol. 1970; 29: 237–241. [PubMed[Google Scholar]
17. Ghaznawi HI, Daas H, Salako NO. A clinical and radiographic survey of selected dental anomalies and conditions in a saudi arabian population. Saudi Dental Journal. 1999; 11:8–13. [Google Scholar]
18. Ghabanchi J, Haghnegahdar AA, Khodadazadeh SH, Haghnegahdar S. A radiographic and clinical survey of dental anomalies in patients referring to Shiraz dental school. Journal of Dentistry, Shiraz University of Medical Sciences. 2010; 10: 26–31. [Google Scholar]
19. Dalili Z, Nemati S, Dolatabadi N, Javadzadeh A, Mohtavipoor S. Prevalence of developmental and acquired dental anomalies on digital panoramic radiography in patients attending the dental faculty of Rasht, Iran. J Dentomaxillofac Radiol Pathol Surg. 2013; 1:24–32. [Google Scholar]
20. Chattopadhyay A, Srinivas K. Transposition of teeth and genetic etiology. Angle Orthod. 1996; 66: 147–152. [PubMed[Google Scholar]
21. Joshi MR, Bhatt NA. Canine transposition. Oral Surg Oral Med Oral Pathol. 1971; 31: 49–54. [PubMed[Google Scholar]
22. Shapira Y. Transposition of canines. J Am Dent Assoc. 1980; 100: 710–712. [PubMed[Google Scholar]
23. Yilmaz HH, Türkkahraman H, Sayin MO. Prevalence of tooth transpositions and associated dental anomalies in a Turkish population. Dentomaxillofac Radiol. 2005; 34: 32–35. [PubMed[Google Scholar]
24. Papadopoulos MA, Chatzoudi M, Kaklamanos EG. Prevalence of tooth transposition. A meta-analysis. Angle Orthod 2010; 80: 275–285. [PubMed[Google Scholar]
25. Guttal KS, Naikmasur VG, Bhargava P, Bathi RJ. Frequency of developmental dental anomalies in the Indianpopulation. Eur J Dent. 2010; 4: 263–269. [PMC free article] [PubMed[Google Scholar]
26. Dash JK, Sahoo PK, Das SN. Talon cusp associated with other dental anomalies: a case report. Int J Paediatr Dent. 2004; 14: 295–300. [PubMed[Google Scholar]
27. Segura JJ, Jiménez-Rubio A. Talon cusp affecting permanent maxillary lateral incisors in 2 family members. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1999; 88: 90–92. [PubMed[Google Scholar]
28. Hamasha AA, Al-Khateeb T, Darwazeh A. Prevalence of dilaceration in Jordanian adults. Int Endod J. 2002; 35: 910–912. [PubMed[Google Scholar]
29. Dang HQ, Constantine S, Anderson PJ. The prevalence of dental anomalies in an Australian population. Aust Dent J. 2017; 62: 161–164. [PubMed[Google Scholar]