Prevalence of impacted mandibular third molars and its association with distal caries in mandibular second molars using cone beam computed tomography.

  • Mardin Othman Rashid Oral Diagnosis Dept. College of Dentistry, University of Sulaimani, Madam Mitterrand Road, Sulaimani, Kurdistan Region, Iraq.
  • Ranjdar Mahmood Talabani Lecturer at Conservative Dept. College of Dentistry, University of Sulaimani Madam Mitterrand Road, Sulaimani, Kurdistan Region, Iraq.
  • Mohammed Taha Baban Dental Nursing Dept. Sulaimani Technical Institute Sulaimani Polytechnic University Chwarchra, Sulaimani, Iraq.
  • Sarhang Sarwat Gul Lecturer at Periodontic Dept. College of Dentistry, University of Sulaimani, Madam Mitterrand Road, Sulaimani, Iraq.
  • Rishwan Omar Salih Health Directory of Sulaimani Qrga, Sulaimani, Iraq.
  • Bamo Namiq Abdulkareem Lecturer at Oral Surgery Dept. College of Dentistry, University of Sulaimani, Madam Mitterrand Road, Sulaimani, Kurdistan Region, Iraq.
  • Darwn Saeed Abdulalttef Lecturer at Conservative Dept. College of Dentistry, University of Sulaima­ni, Madam Mitterrand Road, Sulaimani, Iraq.

Abstract

This study evaluated the prevalence and eruption’s pattern of impacted mandibular third molars (IMTM) and the influence of their eruption status on the distal caries of mandibular second molars (MSM) using cone-beam computed tomography (CBCT). Material and methods: CBCT images taken for different purposes in private dental practices were analyzed retrospectively. Radiographic assessment included: prevalence of IMTM, degree of angulation, level of impaction and type of IMTM. Furthermore, the distance between the cement-enamel junctions (CEJ) of second and third molars and the occurrence of caries lesion on the distal surface of MSM was also evaluated. Data were analyzed by chi square test and logistic regression was used to find the association between distal caries of MSM and eruption status of IMTM. Results: Three hundred and eight CBCTs were screened, the prevalence of IMTM was 36.88% and their angulation degree were mostly less than 90º (mesioangular). Amongst those with impaction, 58 subjects (43%) had distal caries on MSM, 29.6% in females and 30.4% in the age group 19-27 years. Caries on the distal side of MSM were significantly associated with age, level and type of impaction, angulation degree and CEJ distances (p<0.05). Conclusions: The prevalence of IMTM is high (36.88%) and there are significant relationships between angulation degree, level and type of impaction, and CEJ distances with caries on the distal side of MSM.
Published
2019-03-20
How to Cite
RASHID, Mardin Othman et al. Prevalence of impacted mandibular third molars and its association with distal caries in mandibular second molars using cone beam computed tomography.. Journal of Oral Research, [S.l.], v. 8, n. 1, p. 66-73, mar. 2019. ISSN 0719-2479. Available at: <http://www.joralres.com/index.php/JOR/article/view/joralres.2019.009>. Date accessed: 17 june 2019. doi: https://doi.org/10.17126/joralres.2019.009.

Keywords

Impacted mandibular third molar; mesioangular; iraqi kurds; distal caries; cone beam computed tomography.