Dental ImplantNCT07815977
Effect of Cover Screws and Healing Abutments on Marginal Bone Loss
A study testing Cover Screw and Healing Abutment in people with Dental Implant and Marginal Bone Loss, run by Adiyaman University at 1 site in Turkey (Türkiye).
Trial summary
This randomized clinical trial aims to compare the effects of using a cover screw or a healing abutment during dental implant placement on short-term marginal bone loss. Participants receiving dental implants will be randomly assigned to either the cover screw group or the healing abutment group. Read more about this study
- Who is it for?
- Ages 18 to 65 yearsHealthy volunteers can take part
- Conditions the study is for
- Dental Implant, Marginal Bone Loss
- What is being tested?
- Cover Screw and Healing Abutment
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 50 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 15 Jan 2026to 17 Sep 2026
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
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 to 65 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Age between 18 and 65 years
- Systemically healthy individuals
- Non-smokers
- Adequate alveolar bone height and width for implant placement without the -need for bone augmentation or regenerative procedures
- Adequate keratinized mucosal width (>2 mm) at the planned implant site
- Indication for dental implant treatment
Who cannot join
- Presence of systemic disease or medical conditions that may contraindicate -implant surgery or affect bone healing
- Current smoking or use of tobacco products
- Insufficient alveolar bone height or width requiring bone augmentation or regenerative procedures at the implant site
- Keratinized mucosal width ≤2 mm at the planned implant site
- Presence of conditions that preclude standard dental implant placement
- Inability or unwillingness to attend the 3-month follow-up visit
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Faculty of Dentistry, Adıyaman University
Adıyaman, Adıyaman Province, 02030
About this study
Official title: Comparison of Cover Screws and Healing Abutments During Implant Placement on Marginal Bone Loss: A Randomized Clinical Trial
This randomized clinical trial aims to compare the effects of using a cover screw or a healing abutment during dental implant placement on short-term marginal bone loss. Participants receiving dental implants will be randomly assigned to either the cover screw group or the healing abutment group. Marginal bone levels around the implants will be evaluated radiographically at baseline and at the 3-month follow-up. The study aims to determine whether the healing approach used at the time of implant placement affects marginal bone level changes during the early healing period.
Read the detailed description
Preservation of peri-implant marginal bone is an important factor for the long-term success of dental implants. Following implant placement, different healing approaches can be used. In submerged healing, a cover screw is placed and the implant remains beneath the soft tissue during the healing period. In transmucosal healing, a healing abutment is connected to the implant and extends through the soft tissue during healing.
This randomized clinical trial compares the short-term effects of these two healing approaches on peri-implant marginal bone levels. Eligible participants undergoing dental implant treatment will be randomly allocated to either the cover screw group or the healing abutment group.
Peri-implant marginal bone levels will be assessed using periapical radiographs obtained with the paralleling technique at baseline and at the 3-month follow-up. Marginal bone level changes from baseline to 3 months will be measured radiographically and compared between the two groups. The primary objective is to determine whether the use of a cover screw or a healing abutment at the time of implant placement affects marginal bone loss during the early healing period.
- Conditions
- Dental Implant, Marginal Bone Loss
- Being tested
- Cover Screw, Healing Abutment
- Keywords
- Dental Implants, Marginal Bone Loss, Cover Screw, Healing Abutment, Peri-Implant Bone
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Cover ScrewDevice
A cover screw is connected to the dental implant at the time of implant placement
Healing AbutmentDevice
A healing abutment is connected to the dental implant at the time of implant
| Study group | Role | What they receive |
|---|---|---|
| Cover Screw Group | Experimental | Following dental implant placement, a cover screw is connected to the implant, and the implant is allowed to heal using a submerged healing approach. Peri-implant marginal bone levels are evaluated radiographically using periapical radiographs obtained with the paralleling technique at baseline and at 3 months. Receives: Device: Cover Screw |
| Healing Abutment Group | Experimental | Following dental implant placement, a healing abutment is connected to the implant, and the implant is allowed to heal using a transmucosal healing approach. Peri-implant marginal bone levels are evaluated radiographically using periapical radiographs obtained with the paralleling technique at baseline and at 3 months. Receives: Device: Healing Abutment |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Peri-Implant Marginal Bone Level
Peri-implant marginal bone levels will be measured on periapical radiographs obtained using the paralleling technique. The distance from the implant reference point to the marginal bone level will be measured in millimeters at the mesial and distal aspects of each implant. Marginal bone level change will be determined by comparing the baseline measurement with the 3-month measurement.
Measured: Baseline and 3 months after implant placement
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted11 Sep 2026
- Study start15 Jan 2026
- Primary completion17 Sep 2026 (estimated)
- Study completion17 Sep 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Dental ImplantStudies 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Participants are randomly assigned to one of two parallel groups: a cover screw (submerged healing) group or a healing abutment (transmucosal healing) group. Peri-implant marginal bone level changes are evaluated radiographically over a 3-month follow-up period.
- Masking
- None (open label)
- Enrolment
- 50 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Adiyaman University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Zeliha Başak Çakır Erdil, Adiyaman University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07815977
- Sponsor's protocol ID
- HRU/26.01.58
- Status last verified
- Sep 2026
- First submitted
- 7 Sep 2026
- Last updated
- 11 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: De-identified individual participant data underlying the results reported in the published article may be shared upon reasonable request following publication, subject to approval by the corresponding author and applicable ethical and institutional requirements.
Study at a glance
From the registry record, last updated by the sponsor on 11 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Cover Screws and Healing Abutments During Implant Placement on Marginal Bone Loss: A Randomized Clinical Trial
- ClinicalTrials.gov ID
- NCT07815977
- Acronym / sponsor ID
- HRU/26.01.58
- Conditions
- Dental Implant, Marginal Bone Loss
- Keywords
- Dental Implants, Marginal Bone Loss, Cover Screw, Healing Abutment, Peri-Implant Bone
- Study type
- Interventional
- Recruitment status
- Active, not recruiting
- Enrolment
- 50 participants (estimated)
- Lead sponsor
- Adiyaman UniversityUniversity, hospital or other
- Study start
- 15 Jan 2026 (actual)
- Primary completion
- 17 Sep 2026 (estimated)
- Study completion
- 17 Sep 2026 (estimated)
- First posted
- 11 Sep 2026 (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 randomized clinical trial aims to compare the effects of using a cover screw or a healing abutment during dental implant placement on short-term marginal bone loss. Participants receiving dental implants will be randomly assigned to either the cover screw group or the healing abutment group. Marginal bone levels around the implants will be evaluated radiographically at baseline and at the 3-month follow-up. The study aims to determine whether the healing approach used at the time of implant placement affects marginal bone level changes during the early healing period.
Detailed description
Preservation of peri-implant marginal bone is an important factor for the long-term success of dental implants. Following implant placement, different healing approaches can be used. In submerged healing, a cover screw is placed and the implant remains beneath the soft tissue during the healing period. In transmucosal healing, a healing abutment is connected to the implant and extends through the soft tissue during healing.
This randomized clinical trial compares the short-term effects of these two healing approaches on peri-implant marginal bone levels. Eligible participants undergoing dental implant treatment will be randomly allocated to either the cover screw group or the healing abutment group.
Peri-implant marginal bone levels will be assessed using periapical radiographs obtained with the paralleling technique at baseline and at the 3-month follow-up. Marginal bone level changes from baseline to 3 months will be measured radiographically and compared between the two groups. The primary objective is to determine whether the use of a cover screw or a healing abutment at the time of implant placement affects marginal bone loss during the early healing period.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
- Model description
- Participants are randomly assigned to one of two parallel groups: a cover screw (submerged healing) group or a healing abutment (transmucosal healing) group. Peri-implant marginal bone level changes are evaluated radiographically over a 3-month follow-up period.
| Arm | Type | Receives |
|---|---|---|
| Cover Screw Group | Experimental | Device: Cover ScrewFollowing dental implant placement, a cover screw is connected to the implant, and the implant is allowed to heal using a submerged healing approach. Peri-implant marginal bone levels are evaluated radiographically using periapical radiographs obtained with the paralleling technique at baseline and at 3 months. |
| Healing Abutment Group | Experimental | Device: Healing AbutmentFollowing dental implant placement, a healing abutment is connected to the implant, and the implant is allowed to heal using a transmucosal healing approach. Peri-implant marginal bone levels are evaluated radiographically using periapical radiographs obtained with the paralleling technique at baseline and at 3 months. |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- Age between 18 and 65 years
- Systemically healthy individuals
- Non-smokers
- Adequate alveolar bone height and width for implant placement without the -need for bone augmentation or regenerative procedures
- Adequate keratinized mucosal width (>2 mm) at the planned implant site
Key exclusion criteria (6 listed)
- Presence of systemic disease or medical conditions that may contraindicate -implant surgery or affect bone healing
- Current smoking or use of tobacco products
- Insufficient alveolar bone height or width requiring bone augmentation or regenerative procedures at the implant site
- Keratinized mucosal width ≤2 mm at the planned implant site
- Presence of conditions that preclude standard dental implant placement
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 |
|---|---|---|
| Cover ScrewA cover screw is connected to the dental implant at the time of implant placement | Device | Cover Screw Group |
| Healing AbutmentA healing abutment is connected to the dental implant at the time of implant | Device | Healing Abutment Group |
Primary outcome
Change in Peri-Implant Marginal Bone Level
Time frame: Baseline and 3 months after implant placement
Peri-implant marginal bone levels will be measured on periapical radiographs obtained using the paralleling technique. The distance from the implant reference point to the marginal bone level will be measured in millimeters at the mesial and distal aspects of each implant. Marginal bone level change will be determined by comparing the baseline measurement with the 3-month measurement.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 11 Sep 2026.
- Individual participant dataSharing planned: Yes. De-identified individual participant data underlying the results reported in the published article may be shared upon reasonable request following publication, subject to approval by the corresponding author and applicable ethical and institutional requirements.
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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?
A study testing Cover Screw and Healing Abutment in people with Dental Implant and Marginal Bone Loss, run by Adiyaman University at 1 site in Turkey (Türkiye).
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 6 inclusion and 6 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: under way, not looking for participants, as of the sponsor's last update on 11 Sep 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 Turkey (Türkiye). 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?
This study is still under way. Results are not available in the source record yet.
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?
Change in Peri-Implant Marginal Bone Level (time frame: Baseline and 3 months after implant placement). 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 11 Sep 2026.