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RecruitingNCT06364982Updated Jul 17, 2024

Distance Between Dental Implants as a Risk Indicator for Peri-implant Disease.

An observational study in Peri-implant Mucositis and Peri-Implantitis, sponsored by Universitat Internacional de Catalunya. Recruiting at 1 site in Spain. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-07-17.

Sponsored by Universitat Internacional de Catalunya · Observational

From the registry’s dates

  • Primary completion was expected by Dec 2024, 1 year 9 months ago, but the record still lists the study as recruiting.
  • Started Apr 2024; still recruiting 2 years 6 months later.
Study type
Observational
Model
Cohort
Time perspective
Cross-sectional
Enrollment
180
Ages
18 Years and older
Sex
All
01

Study summary

The aim of this study is to analyse contiguous dental implants and its peri-implant status depending on different inter-implant distances.

Read the detailed description

The present research project has been designed as a multicentric cross-sectional study. The STROBE guidelines have been followed in the design of this observational study.

Ethical issues The study will be performed after the approval of the Ethics Committee of the Universitat Internacional de Catalunya (UIC) and Faculdade de Medicina Dentária da Universidade de Lisboa (FMDUL) and will be intended to be registered in clinicaltrials.gov. Also, this research will be conducted according to the principles outlined in the Declaration of Helsinki (revised, amended, and clarified in 2013). In addition, all study participants will provide written informed consent before participating in the study.

Study population Subjects will be selected from an electronic database collected at the CUO (UIC) / CU (FMDUL) and composed of patients treated with at least two contiguous dental implants before 2021. This investigation will use a stratified random sampling based on year of implant placement to select a representative sample of subjects with implant-supported restorations conducted during the period 2001-2020 at the CUO and CU. Then, two examiners (I.T. / F.F.) will contact patients by telephone once every 2 days (with a maximum of 3 attempts) for an evaluation by the same investigators (I.T / F.F).

Criteria for subject selection will be as follows:

  • The patient must be ≥18 years of age and systemically healthy;
  • Partially edentulous patients, rehabilitated until 2020 (i.e., a minimum of 3 years of function time) with at least two contiguous implant-supported restorations in the maxilla or mandible;
  • Screw or cemented-retained prosthesis;
  • Fixed dental prosthesis (i.e., single crowns and partial prosthesis);
  • No implant mobility.

Moreover, the exclusion criteria will be the following:

  • Pregnant and lactating women;
  • Patients who have taken systemic antibiotics during the 3 months prior to the examination;
  • Patients being treated with drugs that may induce a gingival overgrowth;
  • Patients undergoing orthodontic treatment (since it can influence periodontal diagnosis);
  • Patients who have received mechanical debridement during the 3 months prior to the exam;
  • Patients who have received surgical treatment for peri-implantitis;
  • Psychophysical inability to carry out study procedures.
02

Conditions studied

  • Peri-implant Mucositis
  • Peri-Implantitis

Keywords

  • Peri-implantitis
  • Peri-implant diseases
  • Peri-implant mucositis
  • Inter-implant distances
03

In context

Mucositis

488 studies on the registry are indexed under Mucositis; 70 are open to participants now.

This study's planned enrollment of 180 is above the median of 102 across 66 observational studies indexed under Mucositis.

Browse Mucositis studies →

Lead sponsor

Universitat Internacional de Catalunya is the lead sponsor of 144 studies on the registry; 43 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Probability sample

Study population

Subjects will be selected from an electronic database collected at the CUO (UIC) / CU (FMDUL) and composed of patients treated with at least two contiguous dental implants before 2021. This investigation will use a stratified random sampling based on year of implant placement to select a representative sample of subjects with implant-supported restorations conducted during the period 2001-2020 at the CUO and CU. Then, two examiners (I.T. / F.F.) will contact patients by telephone once every 2 days (with a maximum of 3 attempts) for an evaluation by the same investigators (I.T / F.F).

Inclusion criteria

  • The patient must be ≥18 years of age and systemically healthy;
  • Partially edentulous patients, rehabilitated until 2020 (i.e., a minimum of 3 years of function time) with at least two contiguous implant-supported restorations in the maxilla or mandible;
  • Screw or cemented-retained prosthesis;
  • Fixed dental prosthesis (i.e., single crowns and partial prosthesis);
  • No implant mobility.

Exclusion criteria

Exclusion Criteria:

  • Pregnant and lactating women;
  • Patients who have taken systemic antibiotics during the 3 months prior to the examination;
  • Patients being treated with drugs that may induce a gingival overgrowth;
  • Patients undergoing orthodontic treatment (since it can influence periodontal diagnosis);
  • Patients who have received mechanical debridement during the 3 months prior to the exam;
  • Patients who have received surgical treatment for peri-implantitis;
  • Psychophysical inability to carry out study procedures.
05

Study design

Observational model
Cohort
Time perspective
Cross-sectional
Enrollment
180 participants (estimated)
Patient registry
No

Groups and cohorts

  • Inter-implant distance ≤ 3mm

    Presence of an inter-implant distance ≤ 3mm

    Diagnostic Test: Two contiguous dental implants placed with less ≤ 3mm from each other.

  • Inter-implant distance ≥ 3mm

    Presence of an inter-implant distance ≥ 3mm

    Diagnostic Test: Two contiguous dental implants placed with > 3mm from each other.

Interventions

  • Diagnostic testTwo contiguous dental implants placed with less ≤ 3mm from each other.

    Implant Placement of 2 contiguous dental implants with less ≤ 3mm from each other.

  • Diagnostic testTwo contiguous dental implants placed with > 3mm from each other.

    Implant Placement of 2 contiguous dental implants with \> 3mm from each other.

06

What researchers measure

Primary outcomes

  1. Prevalence of peri-implant diseases.

    Prevalence of peri-implant mucositis and peri-implantitis.

    Time frame: At least 36 months of function - at the moment of the evaluation

Secondary outcomes

  1. FMPI

    Full Mouth Plaque Index

    Time frame: At least 36 months of function - at the moment of the evaluation

  2. FMBI

    Full Mouth Bleeding Index

    Time frame: At least 36 months of function - at the moment of the evaluation

  3. mPI

    modified Plaque Index

    Time frame: At least 36 months of function - at the moment of the evaluation

  4. mBI

    modified Bleeding Index

    Time frame: At least 36 months of function - at the moment of the evaluation

  5. SoP

    Suppuration on Probing

    Time frame: At least 36 months of function - at the moment of the evaluation

  6. PPD

    Probing Pocket Depth

    Time frame: At least 36 months of function - at the moment of the evaluation

  7. MR

    Mucosal Recession

    Time frame: At least 36 months of function - at the moment of the evaluation

  8. KM

    Keratinized Mucosa

    Time frame: At least 36 months of function - at the moment of the evaluation

  9. Implant location

    Implant location in the oral cavity

    Time frame: At least 36 months of function - at the moment of the evaluation

  10. Implant position

    Implant position in the oral cavity

    Time frame: At least 36 months of function - at the moment of the evaluation

  11. Implant type

    Implant type used

    Time frame: At least 36 months of function - at the moment of the evaluation

  12. Implant brand

    Brand of the implant used

    Time frame: At least 36 months of function - at the moment of the evaluation

  13. Implant roughness

    Type of implant roughness

    Time frame: At least 36 months of function - at the moment of the evaluation

  14. Implant diameter

    Type of implant diameter

    Time frame: At least 36 months of function - at the moment of the evaluation

  15. Implant length

    Length of the implant

    Time frame: At least 36 months of function - at the moment of the evaluation

  16. Apico-coronal position of the implant

    Apico-coroal position

    Time frame: At least 36 months of function - at the moment of the evaluation

  17. Inter-implant distances (IID)

    Inter-implant distance

    Time frame: At least 36 months of function - at the moment of the evaluation

  18. Implant placement protocol

    Moment of the implant placement

    Time frame: At least 36 months of function - at the moment of the evaluation

  19. Bone grafting procedures (BGP) at implant placement

    Bone grafting associated with the implant placement

    Time frame: At least 36 months of function - at the moment of the evaluation

  20. Implant-supported restorations

    Screwed or Cemented

    Time frame: At least 36 months of function - at the moment of the evaluation

  21. Cleansability of the prosthesis

    Cleansable, difficult or impossible to clean

    Time frame: At least 36 months of function - at the moment of the evaluation

07

Study locations

1 of 1 sites recruiting
  • Clínica Universitaria de Odontologia
    Sant Cugat Del Vallès, Barcelona 08195, Spain
    Recruiting
08

References and documents

Study documents

  • Protocol and statistical analysis plan · Apr 10, 2024

Documents are hosted by the registry — open the source record to download them.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 17, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06364982
Lead sponsor
Universitat Internacional de Catalunya
Responsible party
Tiago Ribeiro Amaral (PhD candidate, Universitat Internacional de Catalunya) — Principal investigator
First posted
Apr 15, 2024
Start date
Apr 5, 2024
Primary completion
Dec 31, 2024 (estimated)
Completion
Dec 31, 2024 (estimated)
Last update
Jul 17, 2024

Study contacts

Ioannis Terpou, MSc
Contact
ioannisterpou.95@uic.es
+306978218177
Tiago R Amaral, MSc
Contact
tiagoamaral@edu.ulisboa.pt
+351916067069
Cristina V Vallès, PhD
study director · Department of Periodontology, University Internacional de Cataluña

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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