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J Dent Educ. 73(11): 1293-1305 2009
© 2009 American Dental Education Association
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Evidence-Based Dentistry

Evidence-Based Patient Education: Knowledge Transfer to Endodontic Patients

John T. Sorrell, Ph.D.; Daniel W. McNeil, Ph.D.; Lori L. Gochenour, D.D.S., M.S.; C. Russell Jackson, D.D.S., M.S.

Key words: evidence-based dentistry, patient education, endodontics, audiovisual, dental fear, information

Submitted for publication 07/29/09; accepted 08/04/09

Evidence-based treatment is emphasized in oral health care, but there has been less focus on empirically demonstrating the effects of patient education. Attempts to educate patients must be empirically demonstrated in order to provide evidence-based guidance to practitioners and educators. We conducted two studies that assessed information acquisition during five-minute audiovisual films on oral hygiene procedures, endodontic procedures, and fear about pain during root canal therapy. A fifteen-item Dental Knowledge Questionnaire (DKQ), with three subscales each focusing on the content of one of the films, was developed and psychometrically evaluated. Study 1 included 268 undergraduates; study 2 involved 104 endodontic patients. Participants completed the DKQ, viewed one of the three films, and repeated the questionnaire. The effects of information on knowledge were assessed using 3 (film group) X 3 (subscale of the DKQ) X 2 (time) repeated measures ANOVAs. Scores improved in a content-specific fashion relevant to the film viewed among undergraduates, F(4, 263)=211.33, p<.001, partial {eta}2=.62 and endodontic patients, F(4, 99)=87.22, p<.001, partial {eta}2=.63. The results provide evidence for using brief informational film as an efficacious method to increase patient knowledge, at least in the short term. The DKQ is proposed as a tool to assess patient knowledge in the arenas of oral hygiene and endodontics.






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