KUMJ | VOL. 15 | NO. 1 | ISSUE 57 | JAN.-MARCH, 2017
Incidence and Pattern of Impaction of Mandibular Third Molars : A Single Institutional Experience in Nepal
Upadhyaya C, Chaurasia NK, Neupane I, Srivastava S
Abstract: Background
Impacted teeth are those that have erupted or are partially erupted and will not
assume a normal arch relationship with opposing and adjacent teeth and tissues.
Objective
To evaluate the incidence and pattern of mandibular impacted third molars in
patients of Dhulikhel Hospital.
Method
A retrospective study was conducted from March 2016 to November 2016 and
reviewed 581 orthopantomograms and clinical records of patients who presented to
the Department of Oral and Maxillofacial Surgery. The angulation of impaction was
measured using Winter’s classification and the level and position of impacted third
molar was recorded using Pell and Gregory classification system. The etiology for
extraction was recorded from previous clinical records.
Result
In this study, incidence of impaction was more prevalent in females. The most
common pattern of impaction was mesioangular followed by horizontal, vertical,
distoangular and others. The most common cause of extraction was caries in the
third molar. There was no significant difference between the pattern of impaction in
the right and left sides of the mandible.
Conclusion
Classifications of impacted mandibular third molars can be effectively used to
predict the surgical difficulty and to evaluate the risk of postoperative complications.
Therefore, this study highlights the importance of evaluation of pattern, type and
class of impaction in Nepalese population giving a high clinical significance.
Keyword : Impaction, incidence, mandibular, pattern, third molar
