Missing TeethNCT04378140
Retention and Durability of the Anterior Zirconia Wing Bridge
An observational study of Missing Teeth and Partial-edentulism, run by Roseman University of Health Sciences at 1 site in United States.
Trial summary
This study is a clinical trial to determine the retention and durability of the anterior zirconia wing bridge. The type of zirconia-wing bridge the investigators are researching in this study has two wings which generally have three countersunk holes (meaning that the circumference of the outer portion of the hole is… Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Missing Teeth, Partial-edentulism
- What is being tested?
- zirconia wing bridge
- How many people
- 8 participants
- Where
- 1 siteUnited States
- Study dates
- 5 May 2017to 1 Jul 2025
- 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
- Healthy volunteers accepted
- Adult, Older adult
Study population: Patients of both genders, ages 18 and above with one missing anterior teeth that has periodontal pockets of no more than 4 mm with abutment teeth being non-restored or minimally restored.
Who may be able to join
- Registered patient at Roseman University of Health Sciences in South Jordan, Utah who has undergone a health and dental screening
- One missing anterior tooth
- Adjacent teeth to the missing tooth must be non-restored or minimally-restored in with gums that have pockets of 4 millimeters or less
- Fluent in English or Spanish
Who cannot join
- Patients who are not registered at Roseman University of Health Sciences in South Jordan, Utah
- Patients who are unable to attend 6-month recall appointments
Trial locations and contacts
1 site in 1 country.
United States1 site
Roseman University of Health Sciences
South Jordan, Utah, 84095
About this study
This study is a clinical trial to determine the retention and durability of the anterior zirconia wing bridge. The type of zirconia-wing bridge the investigators are researching in this study has two wings which generally have three countersunk holes (meaning that the circumference of the outer portion of the hole is larger than the inner part of the hole). Composite resin (dental filling material) is placed in the holes as well as under and around the wings.
Twelve patients will have bridges placed and be evaluated every 6 months (ideally) to determine if the bridge is staying in place (retention) and if it is resistant to fracture (durability).
Read the detailed description
For patients missing an anterior tooth, the treatment options available include a dental implant, a removable partial denture, or a bridge. Some patients may not desire an implant due to the surgical nature, the limited bone available or the high cost. Removable partial dentures are relatively inexpensive but are undesirable for many patients due to the limited esthetics, trouble speaking and annoyance of an oral prosthesis. Traditional bridges use adjacent teeth as abutments and replace the missing tooth. However, these require the removal of 1-2 mm of tooth structure on adjacent teeth provide room for the porcelain of the bridge.
Decades ago, the option for a conservative bridge was primarily found in the Maryland bridge, which had two metal wings that were cemented or bonded on to two abutments. Though conservative, the Maryland Bridge did not enjoy a high reputation because of the high rate of debonding (falling off).
In the last several decades, the use of zirconia as a restorative material in dentistry has dramatically risen due to its toughness, resemblance in color to natural teeth, and affordability. Also, composite resin bonding agents (adhesive for dental fillings) have increased in strength and effectiveness. With these two advancements, the possibility of overcoming the some of the previous shortcomings with the Maryland Bridge is more of a reality.
The type of zirconia-wing bridge we are researching in this study has two wings which generally have three countersunk holes (meaning that the circumference of the outer portion of the hole is larger than the inner part of the hole). Composite resin (dental filling material) is placed in the holes as well as under and around the wings.
In summary, the zirconia-wing bridge presents a desirable alternative to traditional options for missing anterior teeth. With the advancements in resin-bonding and zirconia, this study seeks to examine how these combined elements can be used in the zirconia-wing bridge to maximize durability and retention in clinical scenarios.
- Conditions
- Missing Teeth, Partial-edentulism
- Being tested
- zirconia wing bridge
- Medical subject headings
- Anodontia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
zirconia wing bridgeOther
The zirconia wing bridge consists of an artificial tooth made out of zirconia and porcelain on the front side with two zirconia wings that are bonded (glued) onto the back of the two adjacent teeth in the patient's mouth.
What is being measured
The primary outcome is the main question the study is designed to answer.
Number of participants with bridges still bonded to the teeth (retention)
Determines how long the bridge stays bonded to the patient's teeth
Measured: 2 years observation
Secondary outcomes (1)
Number of participants with bridges that have no fractures (durability)
Determine if there is any fracturing of the zirconia
Measured: 2 years observation
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted7 May 2020
- Study start5 May 2017
- Primary completion1 Jul 2025
- Study completion1 Jul 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Missing TeethStudies 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
- Prospective
- Enrolment
- 8 participants (actual)
Sponsor and investigators
- Lead sponsor
- Roseman University of Health Sciences
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, David McMillan, Roseman University of Health Sciences
- Investigators
- David G McMillan, DDS, Principal investigator, Roseman University of Health Sciences
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04378140
- Sponsor's protocol ID
- 1164902
- Status last verified
- Aug 2026
- First submitted
- 4 May 2020
- Last updated
- 24 Aug 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 24 Aug 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Retention and Durability of the Anterior Zirconia Wing Bridge
- ClinicalTrials.gov ID
- NCT04378140
- Acronym / sponsor ID
- 1164902
- Conditions
- Missing Teeth, Partial-edentulism
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 8 participants (actual)
- Lead sponsor
- Roseman University of Health SciencesUniversity, hospital or other
- Study start
- 5 May 2017 (actual)
- Primary completion
- 1 Jul 2025 (actual)
- Study completion
- 1 Jul 2025 (actual)
- First posted
- 7 May 2020 (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 study is a clinical trial to determine the retention and durability of the anterior zirconia wing bridge. The type of zirconia-wing bridge the investigators are researching in this study has two wings which generally have three countersunk holes (meaning that the circumference of the outer portion of the hole is larger than the inner part of the hole). Composite resin (dental filling material) is placed in the holes as well as under and around the wings.
Twelve patients will have bridges placed and be evaluated every 6 months (ideally) to determine if the bridge is staying in place (retention) and if it is resistant to fracture (durability).
Detailed description
For patients missing an anterior tooth, the treatment options available include a dental implant, a removable partial denture, or a bridge. Some patients may not desire an implant due to the surgical nature, the limited bone available or the high cost. Removable partial dentures are relatively inexpensive but are undesirable for many patients due to the limited esthetics, trouble speaking and annoyance of an oral prosthesis. Traditional bridges use adjacent teeth as abutments and replace the missing tooth. However, these require the removal of 1-2 mm of tooth structure on adjacent teeth provide room for the porcelain of the bridge.
Decades ago, the option for a conservative bridge was primarily found in the Maryland bridge, which had two metal wings that were cemented or bonded on to two abutments. Though conservative, the Maryland Bridge did not enjoy a high reputation because of the high rate of debonding (falling off).
In the last several decades, the use of zirconia as a restorative material in dentistry has dramatically risen due to its toughness, resemblance in color to natural teeth, and affordability. Also, composite resin bonding agents (adhesive for dental fillings) have increased in strength and effectiveness. With these two advancements, the possibility of overcoming the some of the previous shortcomings with the Maryland Bridge is more of a reality.
The type of zirconia-wing bridge we are researching in this study has two wings which generally have three countersunk holes (meaning that the circumference of the outer portion of the hole is larger than the inner part of the hole). Composite resin (dental filling material) is placed in the holes as well as under and around the wings.
In summary, the zirconia-wing bridge presents a desirable alternative to traditional options for missing anterior teeth. With the advancements in resin-bonding and zirconia, this study seeks to examine how these combined elements can be used in the zirconia-wing bridge to maximize durability and retention in clinical scenarios.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Patients of both genders, ages 18 and above with one missing anterior teeth that has periodontal pockets of no more than 4 mm with abutment teeth being non-restored or minimally restored.
Key inclusion criteria (4 listed)
- Registered patient at Roseman University of Health Sciences in South Jordan, Utah who has undergone a health and dental screening
- One missing anterior tooth
- Adjacent teeth to the missing tooth must be non-restored or minimally-restored in with gums that have pockets of 4 millimeters or less
- Fluent in English or Spanish
Key exclusion criteria (2 listed)
- Patients who are not registered at Roseman University of Health Sciences in South Jordan, Utah
- Patients who are unable to attend 6-month recall appointments
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 |
|---|---|---|
| zirconia wing bridgeThe zirconia wing bridge consists of an artificial tooth made out of zirconia and porcelain on the front side with two zirconia wings that are bonded (glued) onto the back of the two adjacent teeth in the patient's mouth. | Other | – |
Primary outcome
Number of participants with bridges still bonded to the teeth (retention)
Time frame: 2 years observation
Determines how long the bridge stays bonded to the patient's teeth
1 secondary outcome
Number of participants with bridges that have no fractures (durability)
Time frame: 2 years observation
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 24 Aug 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.
David G McMillan, DDS principal investigator
Roseman University of Health Sciences
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 Missing Teeth and Partial-edentulism, run by Roseman University of Health Sciences at 1 site in United States.
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 4 inclusion and 2 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 24 Aug 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 United States. 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?
Number of participants with bridges still bonded to the teeth (retention) (time frame: 2 years observation). 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 24 Aug 2026.