title: Restoring teeth that are endodontically treated through existing crowns. Part I: Survey of pulpal status on access.
abstract: OBJECTIVE
  The purpose of this study was to identify the pulpal findings encountered by practitioners when accessing complete-coverage crowns that require nonsurgical root canal treatment and the relevance of coronal leakage to the success of the RTC.
  
  
  METHODS
  The survey package consisted of a cover letter stating the instructions, rationale, and purpose for the questionnaire, a questionnaire with 8 short-answer questions, and a stamped, self-addressed envelope. A randomized sample of active dentists (300 general practitioners, 300 prosthodontists, and 300 endodontists) was selected. Collected data were analyzed with the chi-square test.
  
  
  RESULTS
  A 60% response rate was obtained. Statistically significant differences were found among the practitioner groups, depending on the question. General practitioners and endodontists obtain access through crowns and maintain these crowns as final restoration significantly more often than do prosthodontists. Practitioners responded that teeth with complete crowns require nonsurgical root canal treatment after 5 to 10 years.
  
  
  CONCLUSIONS
  Respondents believe that leakage must be addressed when endodontic access cavities in artificial crowns are restored after nonsurgical root canal treatment. General practitioners perform nonsurgical root canal treatment more frequently than do prosthodontists. Practitioners indicated that when teeth with complete crowns require nonsurgical root canal treatment, treatment is most often performed 5 to 10 years after placement of the crown.
authors.affiliation: Department of Restorative Sciences, Baylor College of Dentistry, Texas A&M University System, Health Science Center, Dallas, Texas, USA.
authors.forename: G
authors.initials: G
authors.lastname: Trautmann
authors.forename: J L
authors.initials: JL
authors.lastname: Gutmann
authors.forename: M E
authors.initials: ME
authors.lastname: Nunn
authors.forename: D E
authors.initials: DE
authors.lastname: Witherspoon
authors.forename: J D
authors.initials: JD
authors.lastname: Shulman
mesh_terms: D001291:Attitude of Health Personnel; D016009:Chi-Square Distribution; D003442:Crowns; D003763:Dental Leakage / Q000145:classification; D017267:Dental Prosthesis Design; D003788:Dental Pulp Diseases / Q000175:diagnosis*; D003790:Dental Pulp Necrosis / Q000175:diagnosis; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D004708:Endodontics; D005792:General Practice, Dental; D006801:Humans; D011476:Prosthodontics; D011671:Pulpitis / Q000175:diagnosis; D012390:Root Canal Therapy / Q000379:methods*; D011795:Surveys and Questionnaires; D013997:Time Factors