Pattern of third molar impactions in north-eastern peninsular Malaysia: A 10-year retrospective study

Ahmad P 1 , V'Vian T 2 , Chaudhary FA 3 , Chaudhary A 4 , Haseeb AA 5 , Yaqoob MA 6 Show all authors , Asif JA 7

Affiliations 

  • 1 Oral Medicine Unit, Shaheed Zulfiqar Ali Bhutto Medical College, Islamabad, Pakistan; Medical Research Fellow, AO Research Institute Davos, AO Foundation, 7270 Davos Platz, Switzerland
  • 2 Undergraduate Dentistry Student, Shaheed Zulfiqar Ali Bhutto Medical College, Islamabad, Pakistan
  • 3 Department of Community Dentistry, School of Dentistry, Shaheed Zulfiqar Ali Bhutto Medical College, Islamabad, Pakistan
  • 4 Department of Periodontics, School of Dental Sciences, Universiti Sains Malayia, 16150 Kelantan, Malaysia
  • 5 Department of Oral and Maxillofacial Surgery, King Edward Medical University, Lahore, Pakistan
  • 6 Department of Oral and Maxillofacial Surgery, School of Dental Sciences, Universiti Sains Malayia, 16150 Kelantan, Malaysia
  • 7 Oral Medicine Unit, Shaheed Zulfiqar Ali Bhutto Medical College, Islamabad, Pakistan
Niger J Clin Pract, 2021 Jul;24(7):1028-1036.
PMID: 34290179 DOI: 10.4103/njcp.njcp_499_20

Abstract

Background: Third molar impaction, if left untreated, has the potential to cause several complications. The evaluation of surgical difficulty of impacted third molar extraction aids in better formulation of treatment plan by minimizing surgical complications.

Objective: This study aimed to determine the prevalence of third molar impaction and related pathologic conditions in a cohort of patients living in North-eastern Peninsular Malaysia.

Methods: In this retrospective study, 490 orthopantomograms (OPGs) of patients who were referred to the Oral and Maxillofacial Surgery department between January 2010 and December 2019 were assessed. Data including age, gender, ethnicity, frequency of third molar impactions, their angulations and levels of eruption, retromolar space, and associated pathologic conditions were collected. Statistical analysis was performed using the Statistical Package for Social Sciences (SPSS) version 24.0. The significance level was set to P < 0.05.

Results: A total of 490 patients with a mean age of 28.87 years (range: 20-64) demonstrated 1957 impacted third molars (1022 mandibular + 935 maxillary). Impacted third molars were more likely present in females than males (1:2.20) (p < 0.05); and in Malay-ethnic (44.49%) patients followed by Chinese (34.45%) and Indians (21.02%). Mesioangular was the most common angulation of impaction both in the maxilla (24.68%) and mandible (18.34%). The most common pattern of third molar impaction was IIA (61.67%), and the retromolar space was significantly larger in males (13.6 mm; P < 0.05) than females (11.6 mm). The most frequently occurring pathological condition associated with third molars impaction is dental caries in the second or third molar (15.38%).

Conclusions: This study highlights mesioangular impaction with their occlusal plane at the same level as the occlusal plane of the adjacent tooth being the most prevalent pattern of third molar impaction in North-eastern Peninsular Malaysia.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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