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NCT Number: NCT06872177

Chart Review: Comparing the Position and Tilt of Dental Implants Versus Those of Natural Teeth

Background:

When placing a dental implant, it is not always possible to place it exactly in the same position as the tooth that it replaced. That might be because of how the gums and mouth are shaped, since some bone is always lost after a tooth is extracted. Researchers want to study the records of people who have had dental implants. They want to check to see how much difference there is between how the implant is positioned and how the same tooth on the other side is positioned. They also want to compare how the implant is positioned compared to the tooth it replaced, when that is possible in the dental record.

Study design:

This study will not enroll any participants. The researchers will search the database of patient records at the study clinic to find people who have had dental implants of a single molar tooth. Then they will look at them to find records that include good images that they can use to compare the implant and tooth positions.

Researchers will then analyze the findings and write a review article.

Active, Not Recruiting

This study is active but is not currently recruiting participants.

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Key information

Conditions

Dental Implant

Age range

18 year–85 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Ohio State University Dental Clinics

Columbus, Ohio, 43210, United States

About this study

This is a retrospective chart review. Specifically, the clinic e-chart system will be used to locate patients who received implant surgery. E-charts from January 1, 2016, to January 6, 2025, with pre- and post-implant surgery tomography (CBCT) documentation will be identified and used for this study.

Demographic and clinical data (age, sex, systemic conditions, implant details and surgical treatment outcomes) related to these cases will be collected. Radiographic measurements will include the following:

  • On tomography: 1. Buccolingual axial inclination of natural molars and implants. 2. Mesiodistal axial inclination of natural molars and implants. 3. Presence/absence of fenestration and/or dehiscence around implants 4. Proximity to mandibular canal and/or foramen mentale
  • On Panoramic radiograph: Mesiodistal axial inclination of natural molars and implants.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Patients with mandibular molar implant placement.
  • Presence of contralateral natural mandibular first, second molars or both.
  • Availability of pre-extraction CBCT scans of the corresponding or contralateral mandibular molar tooth or panoramic radiographs for mesiodistal angulation.
  • Availability of post-implant CBCT scans or panoramic radiographs for mesiodistal angulation

Exclusion criteria

  • Incomplete or low-quality CBCT scans.
  • History of mandibular trauma or pathologies altering tooth or implant alignment.
  • History of reconstructive mandibular surgery in the implant region.
  • History of periapical pathology

Treatment and study plan

Measurements

Other

On existing identified chart records: measurements on CBCT and panographic radiographs.

Primary outcomes

  1. Replaced Tooth Comparison

    Time frame: Baseline (prior to tooth extraction), day 1 of implant placement, day 1 of crown placement (4-6 months after implant placement)

    Difference in buccolingual and mesiodistal angulations of placed implant compared with pre-extraction natural tooth.

  2. Contralateral Tooth Comparison

    Time frame: Day 1 of implant placement, day 1 of crown placement (4-6 months after implant placement)

    Difference in buccolingual and mesiodistal angulations of placed implant compared with contralateral natural molar.

Other outcomes

  1. Frequency of Fenestration/Dehiscence

    Time frame: Day 1 of crown placement (4-6 months post-implant placement)

    Presence/absence of fenestration and/or dehiscence around implants

  2. Distance from Foramen Mentale

    Time frame: Day 1 of crown placement (4-6 months post-implant placement)

    Distance between the implant and the foramen mentale, measured with software on CBCT

Sponsors and collaborators

Lead sponsor

Ohio State University

Other

Registry information

Official study title

Axial Inclination of Mandibular Molar Dental Implants Versus Natural Teeth: What Are the Differences?

Important dates

Study start
2026
Primary completion
2027
Study completion
2027
First posted
Mar 12, 2025
Registry last updated
Jul 28, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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