Same-Day tooth crowns: just as good as waiting?
NCT ID NCT04319042
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study looks at whether placing a permanent crown on a dental implant right away (immediate loading) works as well as waiting 4 weeks (early loading) for lower first molars. About 100 adults who need a tooth removed and replaced will get an implant 12-16 weeks after extraction, then receive a crown either immediately or after a month. Researchers will check implant survival, gum health, and patient satisfaction after 12 months.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- dental implant
- What this could lead to
- If successful, this could show that getting a tooth crown on the same day as implant placement works just as well as waiting 4 weeks, saving time and visits.
- What could go wrong
- This is a small, early-stage study (100 people) comparing two established procedures, so it's unlikely to change practice dramatically. Risks include implant failure or infection.
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
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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
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About 100 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Apr 2021
- Expected to finish
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May 2033
An estimate. End dates often move.
- Lead sponsor
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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
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20 years and older
- Sex
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Anyone
- Healthy volunteers
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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: * Age ≥ 20 years * Willingness to sign informed consent and to participate in the study * Plaque index according to Silness and Loe of \< 35% \[26\] * Presence of a mandibular first molar that has to be extracted * Sufficient vertical interocclusal space for the placement of an implant crown (7 mm) * Presence of an opposing natural or artificial tooth * Ridge height sufficient for the placement of a ≥ 10 mm-long implant * Sufficient ridge width for the placement of a 4.1mm diameter implant Exclusion Criteria: * Any physical or mental disorder that would interfere with the ability to perform adequate oral hygiene or the capability of providing written informed consent and compliance to the protocol * Any disorder that would interfere with wound healing or represent a contraindication for implant surgery such as, but not limited to, uncontrolled diabetes or conditions resulting in or requiring immunosuppression, radiation, chemotherapy, frequent use of antibiotics or antiresorptive medication such as bisphosphonates * Pregnancy or lactation * Intention to become pregnant between inclusion and implant loading * Heavy smoking habit with ≥ 10 cig/d * Severe bruxism or clenching habits, present oro-facial pain * Insufficient ridge width/height for the study implant * Defect of any alveolar wall (secondary exclusion criterion at tooth extraction) * ISQ \< 70 (secondary exclusion criterion for Group A at implant placement, for Group B at loading visit)
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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.
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The places running it
2 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Klinik für Oralchirurgie und Stomatologie
RECRUITINGBern, Canton of Bern, 3010, Switzerland
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Klinik für rekonstruktive Zahnmedizin und Gerodontologie
RECRUITINGBern, Canton of Bern, 3010, Switzerland
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