title: Evaluation of reasons for extraction of crowned teeth: a prospective study at a university clinic.
abstract: OBJECTIVE
  The aim of this study was to determine and classify the major reasons for extraction of teeth with full crowns belonging to patients admitted to a university clinic within a specific time frame.
  
  
  METHODS
  Two hundred and eight extracted teeth with full crown belonging to 75 patients were included. Apart from demographic information, reasons for presenting to the hospital, the major reason for extraction, the type of the crown (single crown, bridge abutment, abutment for removable prosthesis), presence of posts, age of restorations, presence of an endodontic treatment and quality were recorded. Comparable data were statistically analyzed using the chi-square test.
  
  
  RESULTS
  Forty-three (57.3%) of the patients were females, whereas 32 (42.7%) were males with an average age of 63.21 ± 13.56. A statistically significant relationship was determined between age groups and rate of extractions, with the lowest extractions detected in the 35-44 years age group and the highest in the 55-64 years age group (p = 0.001). Tooth mobility was the predominant reason for patients' initial presentation (52.9%). The most encountered reason for extraction was periodontal reasons with a prevalence of 59.1%, followed by caries (26.9%) and periapical lesions (12%); 35.6% of extracted teeth had endodontic treatment. Sixty teeth (81.1%) had incomplete root fillings. There was a significant relationship between extractions and incomplete root fillings (p = 0.001).
  
  
  CONCLUSIONS
  Studies comprising other faculty clinics as well as general practices will be complementary in making more generalized statements regarding the etiology of extractions of crowned teeth.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Yeditepe University, Istanbul, Turkey.
authors.forename: Idil
authors.initials: I
authors.lastname: Dikbas
authors.forename: Jale
authors.initials: J
authors.lastname: Tanalp
authors.forename: Ceyda Ozcakir
authors.initials: CO
authors.lastname: Tomruk
authors.forename: Temel
authors.initials: T
authors.lastname: Koksal
mesh_terms: D000328:Adult; D000368:Aged; D003442:Crowns; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D014081:Tooth Extraction; D014495:Universities