Investigating the Relationship between the Type of Impaction of Mandibular Third Molars and the Caries of Distal Surface of Mandibular Second Molars

Document Type : Original Article

Authors

1 Assistant Professor of Oral and Maxillofacial Surgery.Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.

2 Assistant Professor of Oral Radiology.Department of Radiology, Faculty of Dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.

3 Dentist.

Abstract

Background and Objective: The impacted tooth is trapped tooth by an obstruction on the budding path. The existence of impacted mandibular third molar leads to increase of in the caries in the distal neck of second molar due to the contact of third molar.
Subjects and Methods: This study was analytical cross-sectional study conducted from May 2014 to March 2015 among 50 patients with mandibular third molar impaction. Panoramic X-rays and Bitewing radiograph was taken to determine the impaction types and the presence or absence of the second molar caries. Chi-square test was used to investigate the relationship between the mandibular third molar impaction and mandibular second molar distal surface caries.  Data were analysis by SPSS software version 18. PResults: The most common type of dental impaction was the mesioangular (34%). Distoangular and horizontal was (24%) while the vertical impaction was (18%). The degree of impaction in class II (80%) and for class III (20%) were recorded. According to the classification of Pell and Gregory, classes B was classified as the most prevalent impaction, and class A was the lowest. The prevalence of caries was reported in 52% cases. 38.48% cases of caries belonged to mesioangular impaction form which was significantly higher than other types (P<0.05).
Conclusion: Our study showed that the angle of impaction (mesioangular and horizontal) and the class II had significant correlation with caries.

Keywords


1-Ali S, Nazir A, Shah SAA, Akhtar MU. Dental Caries And Pericoronitis Associated With Impacted Mandibular Third Molars—A Clinical And Radiographic Study. Pakistan Oral & Dental Journal 2014;34(2):268-73.
2-Sheikh MA, Riaz M, Shafiq S. Ncidence Of Distal Caries In Mandibular Second Molars Due To Impacted Third Molars – A Clinical & Radiographic Study. Pakistan Oral & Dental Journal 2012;32(3):364-70.
3- Syed KB, Zaheer KB, Ibrahim M, Bagi MA, Assiri MA. Prevalence of Impacted Molar Teeth among Saudi Population in Asir Region, Saudi Arabia – A Retrospective Study of 3 Years. J Int Oral Health. 2013;5(1):43-7.
4-Andreasen J. External Root Resorption: Its Implication In Dental Traumatology, Paedodontics, Periodontics, Orthodontics And Endodontics. Int Endod J. 1985;18(2):109-18.
5-Msagati F, Simon E, Owibingire S. Pattern Of Occurrence And Treatment Of Impacted Teeth At The Muhimbili National Hospital, Dar Es Salaam, Tanzania. BMC Oral Health. 2013;13:1-6.
6-Jung YH, Cho BH. Prevalence of Missing And Impacted Third Molars in Adults Aged 25 Years and Above. Imaging Sci Den. 2013;43(4):219-25.
7-Hassan AH. Pattern of Third Molar Impaction in a Saudi Population. Clin Cosmet Investig Dent. 2010;2:109-13.
8-Quek SL, Tay CK, Tay KH, Toh SL, Lim KC. Pattern of Third Molar Impaction in a Singapore Chinese Population: a Retrospective Radiographic Survey. Int J Oral Maxillofac Surg. 2003;32(5):548-52.
9-Kramer RM, Williams AC. The Incidence of Impacted Teeth. A survey at Harlem Hospital. Oral Surg Oral Med Oral Patho. 1970;29(2):237-41.
10-Nitzan D, Keren T, Marmary Y. Does an Impacted Tooth Cause Root Resorption of the Adjacent One? Oral Surg Oral Med Oral Pathol. 1981;51(3):221-4.
11-Sandhu S, Kaur T. Radiographic Evaluation of the Status of Third Molars in the Asian-Indian Students. J Oral Maxillofac Surg. 2005;63(5):640-5.
12-Leung WK, Corbet EF, Kan KW, Lo EC, Liu JK. A regimen of Systematic Periodontal Care After Removal of Impacted Mandibular Third Molars Manages Periodontal Pockets Associated with the Mandibular Second Molars. J Clin Periodontol. 2005;32(7):725-31.
13-Oderinu OH, Adeyemo WL, Adeyemi MO, O N, Adeyemi MF. Distal Cervical Caries in Second Molars Associated with Impacted Mandibular Third Molars: a case-control study. Oral Surg Oral Med Oral Pathol Oral Radiol. 2012:doi: 10.1016/j.oooo.2012.03.039.
14-Sigaroudi A, Dalili Z, Soghrati F. Evaluation of the Impaction Pattern of the Third Molar Teeth in an Iranian Population. Shiraz univ dent j. 2010;11(3):247-52.
15-Saravi ME, Refoa Y, Dashlibrun YN, Sharifi R. Prevalent of Root Resorption of second Molar Adjustment the Impacted Third Molar in Prepiacal and Panoramic Radiographs. Tehran Univ Med J. 2014;26(4):288-94.
16-Nemcovsky CE, Libfeld H, Zubery Y. Effect of Non-Erupted 3rd Molars on Distal Roots and Supporting Structures of Approximal Teeth. A Radiographic Survey of 202 cases. J Clin Periodontol. 1996;23(9):810-5.