Position of Impacted Mandibular Third Molar in different Skeletal Facial Types

Authors

  • Manish Raj Sapkota Kantipur Dental College
  • Shishir Bhatta Kantipur Dental College
  • Sujita Shrestha Kantipur Dental College
  • Rabindra Man Shrestha Kantipur Dental College

DOI:

https://doi.org/10.3126/ojn.v7i2.20154

Keywords:

facial pattern, impaction, mandibular third molar, orthopantomogram

Abstract

Introduction: Variation in growth pattern in different facial forms affect the space available for tooth eruption, therefore the mandibular third molar impaction has correlation with different skeletal facial types.

Objective: To determine the position of impacted mandibular third molar in different skeletal facial types in Nepalese samples.

Materials & Method: This cross sectional study was carried out on pre-treatment lateral cephalogram and orthopantomogram records of 207 orthodontic patients visiting Kantipur Dental College and Hospital. Age range of the sample was 16-33 years. Various facial forms were determined with the help of mandibular plane angle (SN-GoGn); for which Nemoceph software was used. Beta angle was used to determine the angle of impaction of mandibular third molar. Impaction pattern was classified as per Pell & Gregory and Winter’s system. SPSS version 20 was used for statistical analysis.

Result: Overall rate of mandibular third molar impaction was 63.77% (11.11% unilateral and 52.66% bilateral impaction). The most common type of impaction bilaterally was mesioangular based on Winter’s classification, Class II Position B based on Pell & Gregory’s classification. Higher rate of mandibular third molar impaction was found in dolichofacial type of face (49.2%).

Conclusion: Decreased mandibular third molar impactions are seen in brachyfacial type compared to mesofacial and dolichofacial types

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Author Biographies

Manish Raj Sapkota, Kantipur Dental College

Dental Department, Dental Surgeon

Shishir Bhatta, Kantipur Dental College

Dental Department, Dental Surgeon

Sujita Shrestha, Kantipur Dental College

Dept of Community & Public Health Dentistry, Lecturer

Rabindra Man Shrestha, Kantipur Dental College

Department of Orthodontics, Professor

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Published

2017-12-31

How to Cite

Sapkota, M. R., Bhatta, S., Shrestha, S., & Shrestha, R. M. (2017). Position of Impacted Mandibular Third Molar in different Skeletal Facial Types. Orthodontic Journal of Nepal, 7(2), 15–19. https://doi.org/10.3126/ojn.v7i2.20154

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Section

Original Articles