Diagnostic Interview and One-session Cognitive Therapy in Treatment of Dental Fear


Clinical trial of an application of cognitive behavioural one-session therapy method with patients who have severe or average dental fear/anxiety measured by Modified Dental Anxiety Scale (MDAS). The intervention consists of two different parts: a diagnostic interview and one-session treatment of dental care. The method is based on One-Session Therapy manual (Öst & Skaret, 2013). 30 minimum 18 years old adults takes part to the study. They comes from three different places,primary care clinic, community dental care and dentist´s teaching clinic.

Full Title of Study: “An Application of Treatment Regarding a Diagnostic Interview and One-session Cognitive Behavioural Therapy – Effectiveness in Treatment of Dental Fear”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Non-Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: None (Open Label)
  • Study Primary Completion Date: December 31, 2020

Detailed Description

Purpose is to compare diagnostic interview (n=20) to diagnostic interview and one-session treatment of dental care (n=10). Partners come from three different places, 10 from each: public and private dental care and dental school. Participants from dental school take part to one-session treatment. All participants have normal dental care before final interview. Hypotheses is that dental fear/anxiety will decrease one category (5 points) when measured by Modified dental anxiety scale (MDAS) before the intervention and after normal dental care. Visual Analogue Scale is used to measure the strength of unpleasant feeling before and after intervention in both groups.


  • Behavioral: Diagnostic interview
    • A profound interview to declare causes for negative thoughts, assumptions and beliefs towards dental care. Participants come from public and Private dental care.
  • Behavioral: Combined interview and treatment.
    • Intervention for this group include both the diagnostic interview to declare causes for negative thoughts, assumptions and beliefs towards dental care and one session treatment. Participants come from the Institute of Dentistry.

Arms, Groups and Cohorts

  • Experimental: Diagnostic interview
    • Intervention for this group include diagnostic interview. Oral health Impact Profile (OHIP 14) and Spielberg State and Trait Anxiety (STAI-1) questionnaires and behaviour analyses are used in diagnostic interview.
  • Experimental: Combined interview and treatment
    • Intervention for this group include both the diagnostic interview and one session treatment.

Clinical Trial Outcome Measures

Primary Measures

  • Change in dental fear
    • Time Frame: 6 months
    • Change in fear is measured by a questionnaire called Modified Dental Anxiety Scale (MDAS). Change in fear is indicated by change in mean value of the MDAS between baseline and follow-up measurement

Secondary Measures

  • Compliance to care
    • Time Frame: 6 months
    • Compliance to care is indicated if treatment defined before the baseline interview can be wholly executed. If patient interrupt treatment or cannot be executed at all after baseline interview, then compliance is not fulfilled.

Participating in This Clinical Trial

Inclusion Criteria

  • MDAS 13 or over, dental care in normal circumstances doesn´t work, motivation to treat dental fear, minimum 18 year

Exclusion Criteria

  • Mental disorder, dementia, pregnancy, acute state of somatic illness

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: N/A

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • University of Eastern Finland
  • Provider of Information About this Clinical Study
    • Sponsor
  • Overall Official(s)
    • Liisa Suominen, Professor, Study Director, University of easthern Finland, Kuopio
  • Overall Contact(s)
    • Anna L Suominen, Professor, +358403552442, liisa.suominen@uef.fi

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