Peri-ImplantitisEEAPSNCT07295743
Effect of Emergence Angle on Peri-implant Status
An observational study of Peri-Implantitis and Peri-implant Mucositis, run by Abant Izzet Baysal University at 1 site in Turkey (Türkiye).
Trial summary
The study was conducted at the Division of Periodontology, Bolu Abant İzzet Baysal University Faculty of Dentistry. Participants were systemically healthy individuals aged 18 to 70 who had received dental implant prostheses within the past five years and had high-quality panoramic radiographs. Read more about this study
- Who is it for?
- Ages 18 to 70 yearsHealthy volunteers can take part
- Conditions the study is for
- Peri-Implantitis, Peri-implant Mucositis, Peri-implant Health
- What is being tested?
- emergence profile
- How many people
- 192 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 7 Sep 2024to 1 May 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 to 70 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Patients who have received implants
Who may be able to join
- Systemically healthy individuals or individuals with controlled medical conditions
- Availability of high-quality panoramic radiographs that could be accurately measured after fabrication of the dental implant prosthesis
- Implants placed no more than five years prior to evaluation
Who cannot join
- Individuals with uncontrolled systemic diseases
- Presence of habitual bruxism
- Current smokers
- Pregnant or breastfeeding individuals
- Use of anti-inflammatory or immunosuppressive medications affecting the mucosa or bone
- Individuals who had received treatment for peri-implant disease after implant placement
- Development of peri-implantitis due to residual cement or prosthesis design, or improperly positioned implants
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Bolu Abant Izzet Baysal University, Dentistry Faculty
Bolu, 14030
About this study
Official title: The Effect of Implant Prosthesis Emergence Angle on Peri-Implant Health and Disease
The study was conducted at the Division of Periodontology, Bolu Abant İzzet Baysal University Faculty of Dentistry. Participants were systemically healthy individuals aged 18 to 70 who had received dental implant prostheses within the past five years and had high-quality panoramic radiographs. The peri-implant status of the subjects was evaluated using various indices and radiographic analyses in accordance with Chicago's Classification of Periodontal and Peri-Implant Diseases and Conditions. Additionally, measurements of gingival thickness, gingival phenotype, keratinized gingival width, and emergence angle were performed.
Read the detailed description
Patient histories were collected from those who met the study criteria, and panoramic radiographs were taken. A total of 310 implants were initially assessed, and 192 implants were selected for inclusion in the study. All implant patients underwent an evaluation of plaque index , gingival index, bleeding on probing , pocket depth, clinical attachment level, and gingival recession. The peri-implant condition was determined using these indices and radiographs, in accordance with the guidelines from the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions and the 2023 European Federation of Periodontology. Patients were categorized into three groups: peri-implantitis (64), peri-implant health (64), and peri-implant mucositis (64). Additionally, gingival thickness (GT), keratinized gingival width (KGW), and gingival phenotype (GP) around the implants were measured, and the emergence angle (EA) of the implants was calculated.
- Being tested
- emergence profile
- Keywords
- Dental implants, Emergence angle, Peri-implantitis, Peri-implant tissue
- Medical subject headings
- Peri-Implantitis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
emergence profileOther
The emergence angles of the implants were measured on panoramic radiographs.
| Study group | Role | What they receive |
|---|---|---|
| Peri-implantitis | Peri-implantitis patients are those who have developed inflammation around a dental implant, leading to the loss of supporting bone and the presence of pockets of infection. Receives: Other: emergence profile | |
| Peri-implant mucositis | Peri-implant mucositis refers to a reversible inflammatory condition affecting the soft tissues surrounding a dental implant, characterized by redness, swelling, and bleeding on probing, without any bone loss. Receives: Other: emergence profile | |
| Peri-implant health | Peri-implant health refers to the condition where the tissues surrounding a dental implant are free from inflammation, with no signs of redness, swelling, bleeding on probing, or bone loss, indicating a stable and healthy implant environment. Receives: Other: emergence profile |
What is being measured
The primary outcome is the main question the study is designed to answer.
Emergence angle
EA was determined by measuring the angle formed between the long axis of the implant and a tangent line drawn to the restoration. A line was initially drawn along the long axis of the implant at its outside collar. Subsequently, a second line, tangent to the restoration, was drawn from the platform. The angle at which the junction occurred was recorded as the EA .
Measured: Baseline
Secondary outcomes (8)
periodontal pocket depth
The periodontal pocket depth is the measurement of the distance between the gingival margin and the most coronal region of the junctional epithelium.
Measured: Baseline
bleeding on probing
The bleeding on probing index was established as the occurrence of bleeding in the sulcus, thirty seconds after measuring the depth of the periodontal pockets in all dental implant.
Measured: Baseline
plaque index
an index for estimating the status of oral hygiene by measuring dental plaque that occurs in the areas adjacent to the gingival margin. 0 is minimum and 3 is maximum. The situation worsens as the score increases.
Measured: Baseline
gingival index
The Gingival Index (GI) scores each site on a 0 to 3 scale, with 0 being normal and 3 being severe inflammation characterized by edema, redness, swelling, and spontaneous bleeding. 0 is minimum and 3 is maximum.
Measured: Baseline
clinical attachment level
The peri-implant clinical attachment level is determined by measuring the distance from the implant margin to the base of the mucosal sulcus using a Williams periodontal probe.
Measured: Baseline
Gingival recession
Gingival recession is the measured distance between the enamel-cementum and the gingival margin. Assessment was performed using a Williams periodontal probe.
Measured: Baseline
gingival thickness
GT was measured by inserting a number eight canal file from the buccal side of the implant until it reached the alveolar bone and then securing it with a stopper to determine the distance.
Measured: Baseline
keratinized tissue width
The width of the keratinized gingiva was measured via a periodontal probe from the mucogingival margin to the gingival margin.
Measured: Baseline
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted22 Dec 2025
- Study start7 Sep 2024
- Primary completion30 Apr 2025
- Study completion1 May 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Peri-ImplantitisStudies of the same condition, open and under way.
- More trials run by Abant Izzet Baysal UniversityThe sponsor's other registered studies.
- 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
- Case-control
- Time perspective
- Cross-sectional
- Enrolment
- 192 participants (actual)
Sponsor and investigators
- Lead sponsor
- Abant Izzet Baysal University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Tuğba ŞAHİN, Abant Izzet Baysal University
- Investigators
- Tuğba Şahin, Principal investigator, Abant Izzet Baysal University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07295743
- Sponsor's protocol ID
- AIBU-DH-TS-04
- Acronym
- EEAPS
- Status last verified
- Dec 2025
- First submitted
- 18 Nov 2025
- Last updated
- 22 Dec 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Study at a glance
From the registry record, last updated by the sponsor on 22 Dec 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effect of Implant Prosthesis Emergence Angle on Peri-Implant Health and Disease
- ClinicalTrials.gov ID
- NCT07295743
- Acronym / sponsor ID
- EEAPS / AIBU-DH-TS-04
- Keywords
- Dental implants, Emergence angle, Peri-implantitis, Peri-implant tissue
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 192 participants (actual)
- Lead sponsor
- Abant Izzet Baysal UniversityUniversity, hospital or other
- Study start
- 7 Sep 2024 (actual)
- Primary completion
- 30 Apr 2025 (actual)
- Study completion
- 1 May 2025 (actual)
- First posted
- 22 Dec 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.
The study was conducted at the Division of Periodontology, Bolu Abant İzzet Baysal University Faculty of Dentistry. Participants were systemically healthy individuals aged 18 to 70 who had received dental implant prostheses within the past five years and had high-quality panoramic radiographs. The peri-implant status of the subjects was evaluated using various indices and radiographic analyses in accordance with Chicago's Classification of Periodontal and Peri-Implant Diseases and Conditions. Additionally, measurements of gingival thickness, gingival phenotype, keratinized gingival width, and emergence angle were performed.
Detailed description
Patient histories were collected from those who met the study criteria, and panoramic radiographs were taken. A total of 310 implants were initially assessed, and 192 implants were selected for inclusion in the study. All implant patients underwent an evaluation of plaque index , gingival index, bleeding on probing , pocket depth, clinical attachment level, and gingival recession. The peri-implant condition was determined using these indices and radiographs, in accordance with the guidelines from the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions and the 2023 European Federation of Periodontology. Patients were categorized into three groups: peri-implantitis (64), peri-implant health (64), and peri-implant mucositis (64). Additionally, gingival thickness (GT), keratinized gingival width (KGW), and gingival phenotype (GP) around the implants were measured, and the emergence angle (EA) of the implants was calculated.
Study design
- Observational model
- Case-control
- Time perspective
- Cross-sectional
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Peri-implantitis | – | Other: emergence profilePeri-implantitis patients are those who have developed inflammation around a dental implant, leading to the loss of supporting bone and the presence of pockets of infection. |
| Peri-implant mucositis | – | Other: emergence profilePeri-implant mucositis refers to a reversible inflammatory condition affecting the soft tissues surrounding a dental implant, characterized by redness, swelling, and bleeding on probing, without any bone loss. |
| Peri-implant health | – | Other: emergence profilePeri-implant health refers to the condition where the tissues surrounding a dental implant are free from inflammation, with no signs of redness, swelling, bleeding on probing, or bone loss, indicating a stable and healthy implant environment. |
Who may qualify
- Ages
- 18 to 70 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Patients who have received implants
Key inclusion criteria (3 listed)
- Systemically healthy individuals or individuals with controlled medical conditions
- Availability of high-quality panoramic radiographs that could be accurately measured after fabrication of the dental implant prosthesis
- Implants placed no more than five years prior to evaluation
Key exclusion criteria (7 listed)
- Individuals with uncontrolled systemic diseases
- Presence of habitual bruxism
- Current smokers
- Pregnant or breastfeeding individuals
- Use of anti-inflammatory or immunosuppressive medications affecting the mucosa or bone
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 |
|---|---|---|
| emergence profileThe emergence angles of the implants were measured on panoramic radiographs. | Other | Peri-implant health, Peri-implant mucositis, Peri-implantitis |
Primary outcome
Emergence angle
Time frame: Baseline
EA was determined by measuring the angle formed between the long axis of the implant and a tangent line drawn to the restoration. A line was initially drawn along the long axis of the implant at its outside collar. Subsequently, a second line, tangent to the restoration, was drawn from the platform. The angle at which the junction occurred was recorded as the EA .
8 secondary outcomes
periodontal pocket depth
Time frame: Baseline
bleeding on probing
Time frame: Baseline
plaque index
Time frame: Baseline
gingival index
Time frame: Baseline
clinical attachment level
Time frame: Baseline
Gingival recession
Time frame: Baseline
gingival thickness
Time frame: Baseline
keratinized tissue width
Time frame: Baseline
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 22 Dec 2025.
- Individual participant dataSharing planned: Undecided
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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.
Tuğba Şahin principal investigator
Abant Izzet Baysal University
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 Peri-Implantitis and Peri-implant Mucositis, run by Abant Izzet Baysal 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 3 inclusion and 7 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 22 Dec 2025. 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?
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?
Emergence angle (time frame: Baseline). 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 22 Dec 2025.