Which dental impression method works best? new trial aims to find out.
NCT ID NCT07282977
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This trial tests three common ways to move the gums aside (gingival displacement) when taking impressions for dental crowns. 39 adults needing a single front tooth crown will receive one of three methods: a retraction cord, a retraction paste, or a cord plus hemostatic gel. Researchers will measure how well each method opens the gum sulcus and check for bleeding and pain.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this trial could identify the most effective method for taking dental impressions, improving the fit of crowns and reducing patient discomfort.
- What could go wrong
- This is a small, early-stage trial with only 39 participants, so results may not apply to all patients. It compares existing methods, not a new breakthrough.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
-
About 39 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
-
Dec 2025
An estimate. Start dates often move.
- Expected to finish
-
Jun 2026
An estimate. End dates often move.
- Lead sponsor
-
Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
18 years and older
- Sex
-
Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * need for single crown restoration of maxillary anterior teeth, healthy periodontal status, and subgingival preparation margins on the buccal surface of the affected teeth. Exclusion Criteria: * requirement for more than one restoration, restoration in other dental quadrants, and supragingival preparation margins.
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for Teeth restoration are added.
Genom att skicka in godkänner du våra Användarvillkor
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
-
The places running it
1 site. The list below names each one and where it is.
-
The official record
The full official record for this study. This one lists no contact details, but it is the first place any would appear.
-
A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
-
department of stomatology, Henan provincial people's hospital, People's hospital Henan university.
Zhengzhou, Henan, 450000, China
More trials for these conditions
Other studies related to the condition(s) this trial covers.