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Research Journal of Pharmacy and Technology
Year : 2018, Volume : 11, Issue : 6
First page : ( 2309) Last page : ( 2312)
Print ISSN : 0974-3618. Online ISSN : 0974-360X.
Article DOI : 10.5958/0974-360X.2018.00428.6

Association between impacted mandibular third molars and distal caries in second molars-A radiographic study

Jajashree K. A.1, Dr. Senthilnathan K. P.2, Dr. Kumar M. P. Santhosh3,*

1Under Graduate Student, Saveetha Dental College, Saveetha University, Chennai

2Professor, Department of Oral and maxillofacial Surgery, Saveetha Dental College, Saveetha University, Chennai

3Reader, Department of Oral maxillofacial Surgery, Saveetha Dental College, Saveetha University, Chennai

*Corresponding Author E-mail: santhoshsurgeon@gmail.com

Online published on 24 August, 2018.

Abstract

Objective

The aim of this study was to evaluate the incidence of caries on distal aspect of mandibular second molars in patients with impacted mandibular third molars using cone beam computed tomography (CBCT) radiography and to identify its association with angular position and depth of the impacted mandibular third molars based on the classification by Pell and Gregory.

Methods

Maxillofacial cone beam computed tomography scan records of 35 patients with impacted third molars presenting to the Department of Oral and Maxillofacial Surgery, Saveetha dental college and Hospital were collected and assessed. Using CBCT the radiographic angulation and depth of mandibular third molar impaction were determined and compared to determine the relationship with incidence of caries on the distal surface of the second molar. Data were checked using Sirona software, statistically analyzed and results obtained.

Results

Mesioangular position was the most common type of impaction with a distribution of 56% among all the impactions. According to this study results, 45.7% cases showed caries on the distal aspect of mandibular second molars. The incidence of caries was highest with mesioangularly impacted third molars (62%). A majority of these mesioangular cases were Level A and Class I as per the Pell and Gregory classification.

Conclusion

The prophylactic extraction of mesioangular impacted mandibular third molars is indicated if the angulation in CBCT is between 30° and 70° and is justified by the incidence of distal caries in the second molars.

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Keywords

Angulation, distal cervical caries, impaction, third molar, second molar, CBCT.

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