Single Tooth RestorationNCT06898411
Clinical Evaluation on the Longevity of Glass Ceramic Based Single Tooth Restorations
An observational study of Single Tooth Restoration and Longevity, run by Ivoclar Vivadent AG at 1 site in Liechtenstein.
Trial summary
This retrospective study investigates the longevity of lithium disilicate based glass-ceramic single tooth restorations placed with IPS e.max CAD and IPS e.max Press after a wearing period of more than 15 years. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Single Tooth Restoration, Longevity
- What is being tested?
- Single tooth restoration with IPS e.max
- Type of treatment
- Medical device
- How many people
- 56 participants
- Where
- 1 siteLiechtenstein
- Study dates
- 23 May 2025to 22 Jan 2026
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Adults recieving indirect single tooth restorations (inlay, onlay, veneer or crown) within the internal clinic of Ivoclar Vivadent AG between 2006 and 2010.
Who may be able to join
- Age: > 18 years
- Informed consent signed and understood by the subject
- Received indirect single tooth restoration (inlay, onlay, veneer or crown) within the internal clinic of Ivoclar Vivadent AG between 2006 and 2010
- Single tooth restoration was done with IPS e.max CAD or IPS e.max Press
- Able to visit the internal clinic of Ivoclar Vivadent AG in Schaan, FL.
Who cannot join
- Health status (physical and mental) does not allow participation
Trial locations and contacts
1 site in 1 country.
Liechtenstein1 site
Ivoclar Vivadent AG
Schaan, 9494
About this study
Official title: Retrospective Clinical Study to Investigate the Longevity of Long-term Single Tooth Restorations From IPS e.Max CAD and Press
This retrospective study investigates the longevity of lithium disilicate based glass-ceramic single tooth restorations placed with IPS e.max CAD and IPS e.max Press after a wearing period of more than 15 years. The primary objective is to assess the survival rate of single tooth restorations with IPS e.max CAD and IPS e.max Press after a wearing period of at least 15 years. The secondary objectives are to assess the quality of the single tooth restorations in regard of aesthetic, functional and biological properties.
- Conditions
- Single Tooth Restoration, Longevity
- Being tested
- Single tooth restoration with IPS e.max
- Keywords
- crown, inlay, onlay, glass ceramic, veneer
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Single tooth restoration with IPS e.maxDevice
Examination of single tooth restorations with IPS e.max after a wearing time of more than 15 years. Intraoral situation will be examined similar to a standard dental examination while single tooth restorations will be documneted by photos.
| Study group | Role | What they receive |
|---|---|---|
| Single tooth restoration with IPS e.max | Examination of single tooth restorations with IPS e.max after a wearing time of more than 15 years. Receives: Device: Single tooth restoration with IPS e.max |
What is being measured
The primary outcome is the main question the study is designed to answer.
Survival Rate of single tooth restorations
Study population recieved single tooth restorations with IPS e.max between 2006-2010. After a wearing time of more than 15 years IPS e.max single tooth restorations were examined by a dentist resulting in survival rates of IPS e.max single tooth restorations after 15 years.
Measured: 15 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Mar 2025
- Study start23 May 2025
- Primary completion22 Jan 2026
- Study completion22 Jan 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Single Tooth RestorationStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Retrospective
- Enrolment
- 56 participants (actual)
Sponsor and investigators
- Lead sponsor
- Ivoclar Vivadent AG
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06898411
- Sponsor's protocol ID
- OTCS 350528136
- Status last verified
- Jun 2026
- First submitted
- 13 Mar 2025
- Last updated
- 9 Jun 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 9 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Retrospective Clinical Study to Investigate the Longevity of Long-term Single Tooth Restorations From IPS e.Max CAD and Press
- ClinicalTrials.gov ID
- NCT06898411
- Acronym / sponsor ID
- OTCS 350528136
- Conditions
- Single Tooth Restoration, Longevity
- Keywords
- crown, inlay, onlay, glass ceramic, veneer
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 56 participants (actual)
- Lead sponsor
- Ivoclar Vivadent AGIndustry (pharma, biotech, devices)
- Study start
- 23 May 2025 (actual)
- Primary completion
- 22 Jan 2026 (actual)
- Study completion
- 22 Jan 2026 (actual)
- First posted
- 27 Mar 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This retrospective study investigates the longevity of lithium disilicate based glass-ceramic single tooth restorations placed with IPS e.max CAD and IPS e.max Press after a wearing period of more than 15 years. The primary objective is to assess the survival rate of single tooth restorations with IPS e.max CAD and IPS e.max Press after a wearing period of at least 15 years. The secondary objectives are to assess the quality of the single tooth restorations in regard of aesthetic, functional and biological properties.
Study design
- Observational model
- Cohort
- Time perspective
- Retrospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Single tooth restoration with IPS e.max | – | Device: Single tooth restoration with IPS e.maxExamination of single tooth restorations with IPS e.max after a wearing time of more than 15 years. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Adults recieving indirect single tooth restorations (inlay, onlay, veneer or crown) within the internal clinic of Ivoclar Vivadent AG between 2006 and 2010.
Key inclusion criteria (5 listed)
- Age: > 18 years
- Informed consent signed and understood by the subject
- Received indirect single tooth restoration (inlay, onlay, veneer or crown) within the internal clinic of Ivoclar Vivadent AG between 2006 and 2010
- Single tooth restoration was done with IPS e.max CAD or IPS e.max Press
- Able to visit the internal clinic of Ivoclar Vivadent AG in Schaan, FL.
Key exclusion criteria (1 listed)
- Health status (physical and mental) does not allow participation
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Single tooth restoration with IPS e.maxExamination of single tooth restorations with IPS e.max after a wearing time of more than 15 years. Intraoral situation will be examined similar to a standard dental examination while single tooth restorations will be documneted by photos. | Device | Single tooth restoration with IPS e.max |
Primary outcome
Survival Rate of single tooth restorations
Time frame: 15 years
Study population recieved single tooth restorations with IPS e.max between 2006-2010. After a wearing time of more than 15 years IPS e.max single tooth restorations were examined by a dentist resulting in survival rates of IPS e.max single tooth restorations after 15 years.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 9 Jun 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Single Tooth Restoration and Longevity, run by Ivoclar Vivadent AG at 1 site in Liechtenstein.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 9 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Liechtenstein. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Survival Rate of single tooth restorations (time frame: 15 years). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Jun 2026.