A radiographic survey of agenesis of the third molar: A panoramic study

Purpose: It is a well-known fact that nature tries to eliminate what is not in use. Because of this, the number of certain teeth which are no longer necessary for function are either getting increasingly impacted or are not developing at all. This is especially the case where third molars are concerned. Furthermore, the presence or absence of the third molar is significant to all branches of dentistry and in particular, forensic dentistry. Objectives: The objectives of this study is to assess (1) The prevalence of third molar agenesis in population of age group 18–25 years. (2) The genderwise difference of third molar agenesis. (3) The difference between maxilla and mandible. Materials and Methods: Dental patients, who are advised or referred for orthopantomograph, visited to the Department of Oral Medicine and Radiology were included in the study. The study population comprised 300 patients. Statistical Analysis: The data obtained was tabulated and subjected to statistical analysis. SPSS version 17 software was used for the analysis of the data. The Chi-square test was used for the same. Results: The incidence of agenesis of the third molar is significantly higher for tooth number 18 (P < 0.001). Overall, it is significantly higher among females compared to the males (P < 0.001) in our study population. Conclusion: (1) The present study reports 46.7% agenesis of the third molar. (2) The frequency of third molar agenesis was found significantly greater in the females. (3) Third molar agenesis showed a greater predilection in maxilla compared to mandible.

[1]  M. Alam,et al.  Prevalence of Third Molar Agenesis: Associated Dental Anomalies in Non-Syndromic 5923 Patients , 2016, PloS one.

[2]  D. Augustine,et al.  Age estimation using development of third molars in South Indian population: A radiological study , 2015, Journal of International Society of Preventive & Community Dentistry.

[3]  S. Pallagatti,et al.  Radiographic assessment of agenesis of third molars and para-radicular third molar radiolucencies in population of age group 18-25 years old - a radiographic survey , 2012 .

[4]  S. Byahatti,et al.  Prevalence of eruption status of third molars in Libyan students , 2012, Dental research journal.

[5]  R. D'Souza,et al.  Genes affecting tooth morphogenesis. , 2007, Orthodontics & craniofacial research.

[6]  R. Kapur,et al.  Tooth agenesis and craniofacial morphology in an orthodontic population. , 2002, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[7]  A. Lynham.  Panoramic radiographic survey of hypodontia in Australian Defence Force recruits. , 1990, Australian dental journal.

[8]  Toshiya Endo,et al.  Association between third molar agenesis patterns and agenesis of other teeth in a Japanese orthodontic population , 2013, Odontology.

[9]  Samir Prohiæ,et al.  Incidence of impacted mandibular third molars in population of Bosnia and Herzegovina: a retrospective radiographic study , 2013 .

[10]  Sohil P. Makwana,et al.  STUDY OF A RELATIONSHIP BETWEEN AGENESIS & IMPACTED THIRD MOLAR ( WISDOM ) TEETH , 2013 .

[11]  N. Bindayel.  THE ROLE OF THIRD MOLAR IN ORTHODONTIC TREATMENT , 2011 .

[12]  I. Satko,et al.  Controversy of the third molars. , 2009, Bratislavske lekarske listy.

[13]  Alexandra Y Hentisz.  A Radiographic Study of Third Molar Agenesis in a Sample from the American Midsouth , 2003 .

[14]  F. Hattab,et al.  Impaction status of third molars in Jordanian students. , 1995, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.