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

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

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.

Study Overview

• Status: Not yet recruiting
• Conditions: Dental Implant
• Intervention / Treatment: Other: Measurements

Detailed Description

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.

• Study Type: Observational
• Enrollment (Estimated): 400

Contacts and Locations

• Study Contact: Name: Binnaz Leblebicioglu, DDS, MS, PhD; Phone Number: 614-292-0371; Email: leblebicioglu.1@osu.edu

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

• Sampling Method: Non-Probability Sample

Study Population

Existing records of patients at the Ohio State University College of Dentistry who have had a dental implant of one single molar tooth, between January 1, 2016 and January 6, 2025

Description

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

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Chart Review; Existing records of patients at the Ohio State University College of Dentistry who had a dental implant of one single molar tooth between January 1, 2016 and January 6, 2025	Other: Measurements; On existing identified chart records: measurements on CBCT and panographic radiographs.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Replaced Tooth Comparison	Difference in buccolingual and mesiodistal angulations of placed implant compared with pre-extraction natural tooth.	Baseline (prior to tooth extraction), day 1 of implant placement, day 1 of crown placement (4-6 months after implant placement)
Contralateral Tooth Comparison	Difference in buccolingual and mesiodistal angulations of placed implant compared with contralateral natural molar.	Day 1 of implant placement, day 1 of crown placement (4-6 months after implant placement)

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Frequency of Fenestration/Dehiscence	Presence/absence of fenestration and/or dehiscence around implants	Day 1 of crown placement (4-6 months post-implant placement)
Distance from Foramen Mentale	Distance between the implant and the foramen mentale, measured with software on CBCT	Day 1 of crown placement (4-6 months post-implant placement)

Collaborators and Investigators

• Sponsor: Ohio State University
• Investigators: Principal Investigator: Binnaz Leblebicioglu, DDS, MMS, PhD, Ohio State University

Study record dates

Study Major Dates

• Study Start (Estimated): February 1, 2026
• Primary Completion (Estimated): May 1, 2027
• Study Completion (Estimated): May 1, 2027

Study Registration Dates

• First Submitted: March 6, 2025
• First Submitted That Met QC Criteria: March 11, 2025
• First Posted (Actual): March 12, 2025

Study Record Updates

• Last Update Posted (Actual): January 23, 2026
• Last Update Submitted That Met QC Criteria: January 21, 2026
• Last Verified: January 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Mouth Diseases; Stomatognathic Diseases; Tooth Diseases; Mouth, Edentulous; Investigative Techniques; Weights and Measures
• Other Study ID Numbers: 2025H0006

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO