---
title: Pain and Placebo Analgesia. Does Extended Information About Dental Procedures Reduce Pain Induced by Dental Treatment?
nct_id: NCT02160028
overall_status: COMPLETED
phase: NA
sponsor: Norwegian University of Science and Technology
study_type: INTERVENTIONAL
primary_condition: Anxiety
countries: Norway
canonical_url: "https://parkinsonspathways.com/agent/trials/NCT02160028.md"
clinicaltrials_gov: "https://clinicaltrials.gov/study/NCT02160028"
ct_last_update_post_date: 2017-02-14
last_seen_at: "2026-05-12T07:17:53.714Z"
source: ClinicalTrials.gov (mirrored, no enrichment)
---
# Pain and Placebo Analgesia. Does Extended Information About Dental Procedures Reduce Pain Induced by Dental Treatment?

**Official Title:** Pain and Placebo Analgesia. A Double Blinded, Randomized, Clinical Study About the Impact of Information About Anesthesia, and the Experience of Pain and Stress During Dental Treatment.

**NCT ID:** [NCT02160028](https://clinicaltrials.gov/study/NCT02160028)

## Key Facts

- **Status:** COMPLETED
- **Phase:** NA
- **Study Type:** INTERVENTIONAL
- **Target Enrollment:** 52
- **Lead Sponsor:** Norwegian University of Science and Technology
- **Collaborators:** University of Bergen, Tannhelsetjenestens Kompetansesenter Vest, TK Vest, Tannlegesenteret Madlagården, TSMG
- **Conditions:** Anxiety, Odontophobia
- **Start Date:** 2014-08
- **Completion Date:** 2015-01
- **CT.gov Last Update:** 2017-02-14

## Brief Summary

Information about the effectiveness of treatment has been found to reduce pain, termed placebo analgesia. In this study it will be investigated whether this finding translates to the dental clinic. It will be investigated whether information that suggested that minimal pain will be experienced during filling therapy, can reduce the pain associated with that procedure compared to a group that receives standard information. All patients will receive the same amount of anesthesia and similar procedures during filling therapy. It is predicted that extended information should reduce pain, and that the reduction in pain should be associated with a reduction in stress.

## Eligibility

- **Sex:** ALL
- **Healthy Volunteers:** Yes

```
Inclusion Criteria:

* Patients to be treated for dental caries
* Patients should be able to read and communicate in Norwegian

Exclusion Criteria:

* Patients with life threatening diseases
* Patients taking pain killers for other reasons on the day of treatment
```

## Arms

- **Standard information** (ACTIVE_COMPARATOR) — This group is given anesthetics and standard information before dental treatment about the anesthetics.
- **Extended information** (EXPERIMENTAL) — This group is given anesthetics and extended information before dental treatment about the anesthetics.

## Interventions

- **anesthetics and extended information before dental treatment** (OTHER) — The extended information is a comprehensive explanation about what to expect of the treatment and the anesthetic method, phrased in positive words and opening up for questions after information is given.
- **anesthetics and standard information before dental treatment** (OTHER) — The standard information is short and concise, telling in neutral words what to expect.

## Primary Outcomes

- **Reduction of pain** _(time frame: 1 hour)_ — Pain intensity and pain discomfort will be measured by a VAS (Visual Analog Scale). The patients will report their experience of these factors verbally, four times during the treatment session.

## Secondary Outcomes

- **Reduction of stress** _(time frame: One hour)_

## Locations (1)

- Tannlegesenteret Madlagården, TSMG, Hafrsfjord, Norway

## Recent Field Changes (last 30 days)

- `outcomes.primary` — added _(2026-05-12)_
- `status.primaryCompletionDate` — added _(2026-05-12)_
- `status.completionDate` — added _(2026-05-12)_
- `status.lastUpdatePostDate` — added _(2026-05-12)_
- `design.phases` — added _(2026-05-12)_
- `design.enrollmentCount` — added _(2026-05-12)_
- `eligibility.criteria` — added _(2026-05-12)_
- `eligibility.sex` — added _(2026-05-12)_
- `status.overallStatus` — added _(2026-05-12)_
- `outcomes.secondary` — added _(2026-05-12)_
- `armsInterventions.arms` — added _(2026-05-12)_
- `armsInterventions.interventions` — added _(2026-05-12)_
- `sponsor.lead` — added _(2026-05-12)_
- `sponsor.collaborators` — added _(2026-05-12)_
- `results.hasResults` — added _(2026-05-12)_
- `locations.tannlegesenteret madlagården, tsmg|hafrsfjord||norway` — added _(2026-05-12)_

---

*Canonical: https://parkinsonspathways.com/agent/trials/NCT02160028.md*  
*Source data (authoritative): https://clinicaltrials.gov/study/NCT02160028*  
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