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VOLUME 11 , ISSUE 4 ( July, 2010 ) > List of Articles


Third-Molar Agenesis among Patients from the East Anatolian Region of Turkey

Fatih Kazanci, Mevlut Celikoglu, Ozkan Miloglu, Husamettin Oktay

Citation Information : Kazanci F, Celikoglu M, Miloglu O, Oktay H. Third-Molar Agenesis among Patients from the East Anatolian Region of Turkey. J Contemp Dent Pract 2010; 11 (4):33-40.

DOI: 10.5005/jcdp-11-4-33

License: CC BY-NC 3.0

Published Online: 01-01-2007

Copyright Statement:  Copyright © 2010; The Author(s).



The aim of this study was to determine the frequency and distribution of third-molar agenesis in orthodontic patients from the East Anatolian Region of Turkey.

Methods and Materials

Our data were obtained from the panoramic radiographs of the 2,579 patients 12 to 16 years of age in the Department of Orthodontics at the Atatürk University in Erzurum, Turkey. Subjects with congenital deformities, such as a cleft palate, were excluded from the study. Statistical analysis was performed using SPSS software and a chi-squared test.


Of the 2,579 subjects, 1,964 (76.2 percent) had all four third-molar teeth, 238 (9.2 percent) had three, 214 (8.3 percent) had two, 66 (2.6 percent) had one third molar, and 97 (3.8 percent) had agenesis of all third-molar teeth. There was no significant difference in agenesis of third-molar teeth between the right and left sides and no gender predilection was noted. However, significantly more third-molar teeth were found to be missing from the maxilla compared to the mandible, with a ratio of approximately 1.5:1.


According to our results, the absence of one third molar is the most frequently detected pattern in the East Anatolian population. Additionally, the absence of third molars is more frequent in the maxilla than the mandible.

Clinical Significance

To date no information about third-molar agenesis in the East Anatolian population from Turkey is documented. This is believed to be the first known study on this subject in this population.


Kazanci F, Celikoglu M, Miloglu O, Oktay H. Third-Molar Agenesis among Patients from the East Anatolian Region of Turkey. J Contemp Dent Pract [Internet]. 2010 July; 11(4):033-040. Available from: http://www.thejcdp. com/journal/view/volume11-issue4-kazanci

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  1. Hypodontia in the permanent dentition. A clinical and genetical investigation. Odont Revy. 1956; 7(Suppl 3): 1-100.
  2. Panoramic radiographic survey of hypodontia in Australian Defence Force recruits. Aust Dent J. 1990;35(1):19-22
  3. A survey of 3,874 routine full-mouth radiographs. II. A study of impacted teeth. Oral Surg Oral Med Oral Pathol. 1961; 14(10):1165-9.
  4. Third molar eruption among rural Nigerians. Oral Surg Oral Med Oral Pathol. 1991; 71(2):151-4.
  5. Change in clinical status of third molars in adults during 12 years of observation. J Oral Maxillofac Surg. 1999; 57(4):386-9.
  6. Pathology associated with impacted mandibular third molars in a group of Jordanians. J Oral Maxillofac Surg. 2006; 64(11):1598-602.
  7. Radiographic evaluation of the status of third molars in the Asian- Indian students. J Oral Maxillofac Surg. 2005; 63(5):640-5.
  8. Complications after mandibular third molar surgery: a statistical analysis of 500 consecutive procedures in private practice. J Am Dent Assoc. 1985; 111(2):277-9.
  9. A prospective study of complications related to mandibular third molar surgery. J Oral Maxillofac Surg. 1985; 43(10):767-9.
  10. Indications for management of impacted teeth. In: Alling CC III, Helfrick JF, Alling RD, editors. Impacted teeth. Philadelphia: W.B. Saunders; 1993. p. 46-9.
  11. Principles of management of impacted teeth. In: Peterson LJ. Ellis E III, Hupp JR, Tucker MR, editors. Contemporary oral and maxillofacial surgery. 3rd ed. St. Louis: Mosby; 1998. p. 215-48.
  12. Third molars: a dilemma! Or is it? Am J Orthod Dentofacial Orthop. 1999; 115(6):628-33.
  13. The role of the third molar in the cause of late lower arch crowding: a review. Am J Orthod Dentofacial Orthop. 1989; 95(1):79-83.
  14. A longitudinal study of mandibular arch perimeter. Angle Orthod. 1962; 32:187-92
  15. Clinical observations on the development of third molars. J Osaka Dent Univ. 1992; 26(2): 91-104.
  16. Third molar in Bostonians. Am J Phys Anthropol. 1962; 20:151-4.
  17. The prevalence of third molars in a Swedish population. An epidemiological study. Community Dent Health. 1988; 5(2):121-38.
  18. Third-molar development in relation to chronologic age in Turkish children and young adults. Angle Orthod. 2007; 77(6):1040-5.
  19. Hypodontia of permanent teeth. An orthopantomographic study. Suom Hammaslaak Toim. 1971; 67(4):219-25.
  20. Observation on the time of eruption, congenital absence, and impaction of the third molar teeth. Trans Eur Orthod Soc. 1957; 33:308.
  21. Developmental pattern of the child as reflected in the calcification pattern of the teeth. Am J Dis Child. 1941;62(1):33-67
  22. The controversy concerning the first permanent molar. Aust Dent J 1962;7(3):191-201
  23. Dental anomalies in a population of Saudi Arabian children in Tabuk. Saudi Dent J. 2002;14(1):11-4
  24. Hypodontia: genetics and future perspectives. Braz J Oral Sci. 2005;4(13):695-706
  25. A radiographic survey of third molar development. Br Dent J. 1965;119(9):397-401
  26. Congenitally absent third molars in 12 to 16 year old Singaporean Chinese patients: a retrospective radiographic study. Ann Acad Med Singapore 1996; 25(6):828-30.
  27. Impaction status of third molars in Jordanian students. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1995; 79(1):24-9.
  28. Incidence of third molar development. Angle Orthod. 1934;4:423-33
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