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

Mardin Othman Rashid; Ranjdar Mahmood Talabani; Mohammed Taha Baban; Sarhang S. Gul; Rishwan Omar Salih; Bamo Namiq Abdulkareem; Darwn Saeed Abdulalttef

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

Rashid, Mardin Othman ^[2] ; Talabani, Ranjdar Mahmood ^[3] ; Baban, Mohammed Taha ^[1] ; Gul, Sarhang Sarwat ^[4] ; Salih, Rishwan Omar ^[5] ; Abdulkareem, Bamo Namiq ^[6] ; Abdulalttef, Darwn Saeed ^[7]
1. [1] Sulaimani Polytechnic University
  
  Sulaimani Polytechnic University
  
  Irak
2. [2] Oral Diagnosis Dept. College of Dentistry, University of Sulaimani, Madam Mitterrand Road, Sulaimani, Kurdistan Region, Iraq.
3. [3] Lecturer at Conservative Dept. College of Dentistry, University of Sulaimani Madam Mitterrand Road, Sulaimani, Kurdistan Region, Iraq.
4. [4] Lecturer at Periodontic Dept. College of Dentistry, University of Sulaimani, Madam Mitterrand Road, Sulaimani, Iraq.
5. [5] Health Directory of Sulaimani Qrga, Sulaimani, Iraq.
6. [6] Lecturer at Oral Surgery Dept. College of Dentistry, University of Sulaimani, Madam Mitterrand Road, Sulaimani, Kurdistan Region, Iraq.
7. [7] Lecturer at Conservative Dept. College of Dentistry, University of Sulaimani, Madam Mitterrand Road, Sulaimani, Iraq.
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Localización: Journal of Oral Research, ISSN-e 0719-2479, ISSN 0719-2460, Vol. 8, Nº. 1 (January - February), 2019, págs. 66-73
Idioma: inglés
Títulos paralelos:
- Prevalencia de terceros molares mandibulares impactados y su asociación con caries distales en segundos molares mandibulares mediante tomografía computarizada de haz cónico.
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Resumen
- español
  Este estudio evaluó la prevalencia y el patrón de erupción de terceros molares mandibulares impactados (TMMI), y la influencia de su estado de erupción en la caries distal de los segundos molares mandibulares (SMM) mediante tomografía computarizada de haz cónico (TCHC). Material y métodos: se analizaron retrospectivamente las imágenes de TCHC tomadas para diferentes fines en prácticas dentales privadas. La evaluación radiográfica incluyó: prevalencia de TMMI, grado de angulación, nivel de impacto y tipo de TMMI. Además, también se evaluó la distancia entre la unión amelocementaria (UAC) de los segundos y terceros molares y la aparición de lesión de caries en la superficie distal de SMM. Los datos se analizaron mediante la prueba de chi cuadrado y se usó la regresión logística para evaluar asociaciones entre la caries distal de SMM y el estado de erupción de TMMI. Resultados: Se examinaron 308 TCHC, la prevalencia de TMMI fue de 36.88% y su grado de angulación fue mayoritariamente menor a 90º (mesioangular). Entre aquellos con impacto, 58 sujetos (43%) tenían caries distales en los SMM, 29.6% eran mujeres y 30.4% pertenecieron al grupo de edad de 19-27 años. Las caries en el lado distal de MSM se asociaron significativamente con la edad, el nivel y el tipo de impactación, el grado de angulación y las distancias UAC (p<0.05). Conclusiones: la prevalencia de TMMI es alta (36.88%) y existen relaciones significativas entre el grado de angulación, el nivel y el tipo de impacto, y las distancias UAC con presencia de caries en el lado distal de los SMM.
- English
  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.