One-Visit crowns: stronger ceramic could change dentistry
NCT ID NCT04604301
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tests a new high-strength ceramic material for dental crowns that can be made in a single appointment using a computer technique, avoiding the need for a temporary crown. 48 adults with a decayed, fractured, or poorly restored molar or premolar will receive the crown and be followed for up to 5 years to see how well it holds up and whether it causes tooth sensitivity.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Celtra Quatro ceramic crown
- What this could lead to
- If successful, this could lead to stronger, longer-lasting dental crowns that can be made in a single appointment, reducing patient visits.
- What could go wrong
- This is a small, early-stage study with only 48 participants. The crowns may still fail or cause tooth sensitivity over time.
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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48 people
The number who actually took part.
- Started
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Sep 2020
- Expected to finish
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Nov 2027
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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18 to 110 years
- 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.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * must have at least one carious lesion or defective restoration or fractured tooth in a molar or premolar * reason for restoration should extend more than one-half the intercuspal width of the tooth requiring a full crown restoration * Teeth to be vital and asymptomatic prior to treatment * No more than two restorations will be placed per patient. If a patient presents with more than two acceptable teeth for the study, molar teeth will be included prior to premolar teeth. Exclusion Criteria: * Devital or sensitive teeth * Teeth with prior endodontic treatment of any kind * Teeth with a history of direct or indirect pulp capping procedures * Patients with significant untreated dental disease to include periodontitis and rampant caries * Pregnant or lactating women * Patients with a history of allergies to any of the materials to be used in the study * Patients unable to return for the recall appointments
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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.
Contacts and locations
Locations
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School os Dentistry
Ann Arbor, Michigan, 48109, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.