Incidence of Impacted Mandibular Third Molars with Their Pattern and Associated Complications in Nepalese Population

  • Pranay Ratna Sakya
  • Dipti Shreshta
  • Reena Kumari Shrestha
  • Khushboo Singh
  • Ravneet Malhi
Keywords: Third Molar, Impaction, Mandibular


INTRODUCTION: Impaction may be defined as the failure of complete eruption into a normal functional position of one tooth within normal time due to lack of space in the dental arch, caused by obstruction by another tooth or development in an abnormal position.
MATERIAL AND METHODS: A cross sectional descriptive study was conducted on 945 patients (males=591, females=354) aged between 18- 50 years of age who had mandibular third molars impacted. The difficulty index for mandibular third molar for angulation and depth was based on Winter’s classification (1926).
RESULTS: The most common type of impaction seen was Mesio- angular with (32%) followed by horizontal 264 (27.8%), then followed by other types. Data was analyzed using Statistical Package for Social Sciences (SPSS) version 23.0
CONCLUSION: Impacted third molars are a common observation in routine dental practice. The impaction rate of third molars is higher as compared to other teeth in the dentition. The high prevalence found in the present study, with more than half of these Nepalese adult patients having at least one impacted third molar.


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Author Biographies

Pranay Ratna Sakya

(Associate Professor and HOD)

 Dept. of Oral and Maxiolofacial Surgery

People’s  Dental College and Hospital, Kathmandu

Dipti Shreshta

Dept. of Oral and Maxiolofacial Surgery

People’s  Dental College and Hospital, Kathmandu

Khushboo Singh

Dept. of Public Health Dentistry

People’s  Dental College and Hospital. Kathmandu


Stanly GM, Arthun LB, Jean VH. Third Molar Polymorphism and Its significance to dental genetics. J Dent Res. 1963;42 (Suppl 6):1344-63.

Goyal S, Verma P, Raj SS. Radiographic evaluation of the status of third molars in Sriganganagar population - A digital panoramic study. Malays J Med Sci. 2016;23(6):103–12.

Arsalan W, Mian IM, Bokhari SAH, Moazzam A, Ramat AK, Khan F. Prevalence Of Impacted Mandibular and Maxillary Third Molars: A Radiographic Study in Patients Reporting Madina Teaching Hospital, Faisalabad, JUMDC 2013; 4(2):22-31.

Vilela EM, Vitoi PA. Study of position and eruption of lower third molars in adolescents. Rev Sul Bras Odontol. 2011;8(4):390–7.

Shah AP, Parekh PA. An evaluation of genesis and impaction of 3rd molar in adolescents. Int J Med Dent Sci. 2014;3(2):329–34.

Biswari G, Gupta P, Das D .Wisdom teeth - A major problem in young generation, study on the basis of types and associated complications. Journal of College of Medical Sciences-Nepal 2010;6(3):24-8.

Rogers JS, Hubbell T, Byers C. Man and the Biological World , McGraw-Hill, New York 1942, 313,

Hashemipour MA, Tahmasbi Arashlow M, Fahimi Hanzaei F. Incidence of impacted mandibular and maxillary third molars: A Radiographic study in a Southeast Iran population. Med Oral Patol Oral Cir Bucal. 2013;18(1):e140-5.

Ma'aita J, Alwrikat A. Is the mandibular third molar a risk factor for mandibular angle fracture? Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2000;89(2):143-6.

François B, Nach G. Daniel, Extraction of Impacted Mandibular Third Molars: Postoperative Complications and Their Risk Factors. JCDA 2007;73(4):325-325e.

Kruger E, Thomson WM, Konthasinghe P. Third molar outcomes from age 18 to 26: findings from a population-based New Zealand longitudinal study. Oral Surg Oral Med Oral Pathol Oral Radiol En¬dod. 2001;92:150-5.

Quek SL, Tay CK, Tay KH, Toh SL, Lim KC. Pattern of third molar impaction in a Singapore Chinese population: a retrospective radiographic survey. Int J Oral Maxillafac Surg. 2003;32:548-52.

DOI: 10.26440/IHRJ/02_06/199
Published: 2018-09-23
How to Cite
Pranay Ratna Sakya, Dipti Shreshta, Reena Kumari Shrestha, Khushboo Singh, Ravneet Malhi. Incidence of Impacted Mandibular Third Molars with Their Pattern and Associated Complications in Nepalese Population. IHRJ [Internet]. 2018Sep.23 [cited 2021Dec.4];2(6):146-9. Available from:

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