title: Prevalence of periradicular radiolucencies and its association with the quality of root canal procedures and coronal restorations in an adult urban Indian population.
abstract: OBJECTIVE
  The aim of this cross-sectional study was to determine the prevalence of periradicular radiolucencies (PR) from an urban adult Indian population and to investigate the quality of root canal procedures and coronal restorations and their association with prevalence of PR in root-filled teeth.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  A total of 1,340 subjects (18+ years of age) who reported for non-emergency dental care to 5 different dental care centers had their panoramic radiographs taken during the period from January to December 2013. The periradicular status of 30,098 teeth in these radiographs was evaluated using the Periapical Index Score (PAI). The assessment of the technical quality of the procedure was evaluated based on the criteria of root canal filling length and quality of coronal restoration.
  
  
  METHODS
  The data was analyzed statistically by chi-squared test and odds ratio.
  
  
  RESULTS
  PR was found in 65% of subjects (n = 865) and 5.8% (n = 1,759) of the 30,098 teeth evaluated (4.30% untreated teeth and 1.53% were root-filled teeth). In all, 4.1% of the teeth (n = 1,234) had some filling material in the root canal(s) and the prevalence of PR in these root-filled teeth was 37.4%, while the remaining 62.6% of root canal-filled teeth showed no evidence of PR. PR occurred significantly more often in teeth where root canal filling was filled more than 2 mm short of radiographic apex or when root filling extruded through the apex.
  
  
  CONCLUSIONS
  The prevalence of PR in teeth with untreated root canals in India is 4.30%, which is more than twice the weighted world average, while the prevalence of root-filled teeth (4.1%) is lower than the world average (9.6%). The prevalence of PR in root-filled teeth in India is comparable to that in other populations. Inadequate root canal treatment and poor quality of coronal restoration were associated with increased prevalence of PR.
authors: Department of Conservative Dentistry and Endodontics, Thai Moogambigai Dental College, Dr. MGR Educational and Research Institute University, Chennai, Tamil Nadu, India.
authors: Durvasulu
authors: D
authors: Archana
authors: Department of Conservative Dentistry and Endodontics, Thai Moogambigai Dental College, Dr. MGR Educational and Research Institute University, Chennai, Tamil Nadu, India.
authors: Velayutham
authors: V
authors: Gopikrishna
authors: Professor Emeritus, Baylor College of Dentistry, Texas A and M Health Science Center, Texas, USA.
authors: James L
authors: JL
authors: Gutmann
authors: Department of Conservative Dentistry and Endodontics, Thai Moogambigai Dental College, Dr. MGR Educational and Research Institute University, Chennai, Tamil Nadu, India.
authors: Kamatchi Subramani
authors: KS
authors: Savadamoorthi
authors: Department of Conservative Dentistry and Endodontics, Thai Moogambigai Dental College, Dr. MGR Educational and Research Institute University, Chennai, Tamil Nadu, India.
authors: Angambakkam Rajasekaran Pradeep
authors: AR
authors: Kumar
authors: Department of Conservative Dentistry and Endodontics, Thai Moogambigai Dental College, Dr. MGR Educational and Research Institute University, Chennai, Tamil Nadu, India.
authors: L Lakshmi
authors: LL
authors: Narayanan
keywords: Indian population; periradicular radiolucencies; periradicular status; quality of root canal procedures
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