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3D-Printed dental crowns take on traditional milled ones in new trial

NCT ID NCT07643311

Disease control Sponsor: Hospital San Jose Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study compares two types of dental restorations for molars that have had root canal treatment: one made by milling from a solid block and the other by 3D printing. About 142 adults will receive either a milled or 3D-printed partial crown and be followed for three years to see which holds up better. The goal is to find out if the newer 3D-printed option works as well as the established milled version.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Milled composite resin onlay/overlay or 3D-printed composite resin onlay/overlay
What this could lead to
If successful, this could show that 3D-printed restorations work as well as milled ones, offering a more affordable or faster option for dental crowns.
What could go wrong
This is a small, early-stage trial with only 142 participants, so results may not apply to everyone. Both types of restoration can chip or fail 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

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 142 people

The number the study aims to enrol. It can still change while the study runs.

Started

May 2026

Expected to finish

Jun 2030

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 to 70 years

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Adults aged 18 to 70 years * Absence of active periodontal disease * Good oral hygiene (O'Leary plaque index \<20%) * Absence of parafunctional habits (e.g., bruxism, onychophagia) * Endodontically treated first molars (maxillary or mandibular) with extensive Class II cavities and loss of at least one cusp, requiring onlay or overlay restoration * Tooth with functional occlusal contact and at least one proximal contact * Referred from the Endodontics Department of Hospital San José, with endodontic treatment completed at the same institution * Ability to provide written informed consent * Ability to attend follow-up visits at 12, 24, and 36 months Exclusion Criteria: * Untreated active periodontal disease * Poor oral hygiene (O'Leary plaque index ≥20%) * Generalized active caries * Active parafunctional habits * Teeth with complete circumferential structural destruction or insufficient coronal tooth structure for onlay/overlay restoration * Subgingival margins compromising the biologic width * Known allergy to study materials * Pregnancy or breastfeeding

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Conditions

The condition(s) this trial relates to.

Tooth, Nonvital

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Endodontically treated teeth

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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

  • Hospital San José

    RECRUITING

    Santiago, Santiago Metropolitan, Chile

More trials for these conditions

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