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NCT Number: NCT07528755

Audiovisual vs Verbal Information in Third Molar Surgery

This study evaluates whether audiovisual (video-based) or verbal preoperative information is more effective in reducing dental anxiety and stabilizing physiological responses in patients undergoing impacted mandibular third molar surgery.

A total of 73 patients scheduled for third molar extraction were randomly assigned to receive either video-based information or standard verbal information before surgery. Anxiety levels were assessed using validated scales, and physiological parameters such as heart rate, blood pressure, and oxygen saturation were recorded at different stages of the surgical procedure.

The aim of this study is to determine whether the method of preoperative information has an effect on patients' anxiety levels and physiological stress responses during oral surgery.

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Key information

Conditions

Dental Anxiety Impacted Mandibular Third Molar

Age range

18 year–50 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Gazi University Faculty of Dentistry

Ankara, 06500, Turkey (Türkiye)

About this study

This prospective randomized controlled clinical trial was conducted to evaluate the effects of audiovisual and verbal preoperative information on dental anxiety and hemodynamic parameters in patients undergoing impacted mandibular third molar surgery.

A total of 73 patients scheduled for impacted mandibular third molar extraction were included in the study and randomly assigned to one of two groups: an audiovisual information group (video-based information) and a verbal information group. The audiovisual group received a standardized video presentation explaining the surgical procedure, while the control group received standardized verbal information from the clinician.

Dental anxiety levels were assessed using validated psychometric scales, including the Modified Dental Anxiety Scale (MDAS) and the State-Trait Anxiety Inventory (STAI-S and STAI-T). In addition, physiological parameters such as heart rate, systolic and diastolic blood pressure, and oxygen saturation were recorded at standardized stages of the surgical procedure, including preoperative baseline, anesthesia administration, incision, tooth extraction, suturing, and postoperative period.

The primary objective of the study was to compare the effects of audiovisual and verbal information on dental anxiety levels. Secondary outcomes included the evaluation of hemodynamic parameters during different surgical stages. The study also explored the influence of demographic factors such as age and sex on anxiety and physiological responses.

This study was approved by the Ethics Committee of Gazi University (Decision No: E-77082166-302.08.01-848588), and all participants provided written informed consent prior to inclusion.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Patients scheduled for impacted mandibular third molar extraction
  • Age between 18 and 50 years
  • Literate individuals
  • Mentally healthy individuals
  • Individuals without systemic disease
  • Willingness to participate voluntarily and provide written informed consent

Exclusion criteria

  • Age under 18 years
  • Illiterate individuals
  • Individuals with psychiatric disorders
  • Individuals who declined to participate

Treatment and study plan

Audiovisual Information

Behavioral

Participants watched a standardized video explaining the impacted mandibular third molar surgery procedure, including the main surgical steps, before the operation.

verbal information

Behavioral

Participants received standardized verbal information about the surgical procedure from the clinician before the operation.

Primary outcomes

  1. State Anxiety Level (STAI-S)

    Time frame: Baseline (preoperative) and immediately after surgery

    State anxiety was assessed using the State-Trait Anxiety Inventory-State (STAI-S), a validated 20-item questionnaire with scores ranging from 20 to 80, where higher scores indicate greater anxiety (worse outcome). Measurements were performed at baseline (preoperative) and after the intervention (preoperative, following audiovisual or verbal information.

  2. Dental Anxiety Level (MDAS)

    Time frame: Baseline (preoperative) and immediately postoperatively

    Dental anxiety was assessed using the Modified Dental Anxiety Scale (MDAS), a validated 5-item questionnaire with scores ranging from 5 to 25, where higher scores indicate greater dental anxiety (worse outcome). Measurements were performed at baseline (preoperative) and immediately postoperatively.

Secondary outcomes

  1. Heart Rate

    Time frame: During the perioperative period (from baseline to immediately postoperatively)

    Heart rate (beats per minute) was measured using a non-invasive patient monitoring device at standardized perioperative time points. Measurements were obtained at baseline (preoperative), during local anesthesia administration, surgical incision, tooth extraction, suturing, and immediately after completion of the procedure. Higher heart rate values indicate increased physiological stress response associated with the surgical intervention.

  2. Blood Pressure

    Time frame: During the perioperative period (from baseline to immediately postoperatively)

    Blood pressure (mmHg), including systolic and diastolic values, was measured using a non-invasive patient monitoring device at standardized perioperative time points, including baseline (preoperative), during local anesthesia administration, surgical incision, tooth extraction, suturing, and immediately after completion of the procedure. Higher values indicate increased cardiovascular response to surgical stress.

  3. Oxygen Saturation

    Time frame: During the perioperative period (from baseline to immediately postoperatively)

    Oxygen saturation (%) was measured using a non-invasive patient monitoring device at standardized perioperative time points, including baseline (preoperative), during local anesthesia administration, surgical incision, tooth extraction, suturing, and immediately after completion of the procedure. Values represent the percentage of oxygen-saturated hemoglobin in the blood. Lower values may indicate impaired oxygenation and altered physiological response, whereas higher values reflect adequate oxygenation status. Changes in oxygen saturation may also reflect physiological responses associated with perioperative stress.

Sponsors and collaborators

Lead sponsor

Gazi University

Other

Registry information

Official study title

Effect of Audiovisual Versus Verbal Preoperative Information on Dental Anxiety and Hemodynamic Parameters in Patients Undergoing Impacted Mandibular Third Molar Surgery: A Randomized Controlled Trial

Acronym: AVID

Important dates

Study start
2024
Primary completion
2024
Study completion
2024
First posted
Apr 14, 2026
Registry last updated
Apr 14, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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