Abstract

Purpose: The purpose of this study was to evaluate the impact of implant blooming artifact on the assessment of the peri-implant buccal bone thickness, the accuracy of two CBCT devices, and the reproducibility of CBCT images obtained in different exposure timelines.

Materials and Methods: Four dental implants were placed in the mandible of a cadaver head. The distances between dental implants and the thickness of the peri-implant buccal bone were measured with a high precision caliper. The cadaver head was scanned using 2 different CBCT devices, 12 repeated scans were made while the cadaver head in its initial position (without head repositioning), and another 12 scans were made with positioning the cadaver head for each scan and removing it after each scan (with head repositioning). Two 3-Dimentional (3D) implant-planning softwares were used for measurement. Actual and digital measurements were compared to determine device-specific errors. The repositioned skull scans were used to determine reproducibility of the CBCT devices. The peri-implant buccal bone thickness was measured to evaluate the impact of implants blooming artifact in CBCT images.

Results: There were statistically significant differences between the actual physical measurements and the average digital measurements of the peri-implant buccal bone thickness and the inter implant distance without head repositioning in all groups. There was no statistically significant difference between the average CBCT digital measurements when repositioning the head and the average CBCT digital measurements when the head was not repositioned. The ICC of most digital measurements measured in CBCT images taken with head repositioning was found to be in an almost perfect agreement with the actual physical measurements indicating that these measurements are highly reproducible.

Conclusions: The results of this study indicate that dimensions can vary due to the potential influence of blooming and scatter artifacts when evaluating peri-implant buccal bone in CBCT images, Deviations in measurements from the digital planning software and the impact of artifacts should be a consideration when using CBCT as a diagnostic tool when assessing peri-implant bony tissues, and multiple exposures with head repositioning does not significantly affect the reproducibility of measurements as long as the same CBCT device and software combination is used.

LLU Discipline

Prosthodontics

Department

Prosthodontics

School

School of Dentistry

First Advisor

Mathew T. Kattadiyil

Second Advisor

Chandur Wadhwani

Third Advisor

Rami Jekki

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2020

Date (Title Page)

8-2021

Language

English

Library of Congress/MESH Subject Headings

Cone-Beam Computed Tomography; Dental Implants; Alveolar Process; Artifacts

Type

Thesis

Page Count

xi, 47 p.

Digital Format

PDF

Digital Publisher

Loma Linda University Libraries

Usage Rights

This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.

Collection

Loma Linda University Electronic Theses and Dissertations

Collection Website

http://scholarsrepository.llu.edu/etd/

Repository

Loma Linda University. Del E. Webb Memorial Library. University Archives

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