Abstract

The purpose of this study was to evaluate the cortical bone thickness (mm), cortical bone density (HU), and trabecular bone density (HU) of mini-implants sites in both the maxilla and mandible using QCBCT to determine if they had any effect on mini-implant failure rate. Patient characteristics (age, gender, facial type), mini-implant characteristics (date of placement, manufacturer, length, and diameter), and the mini-implant site (region) were also evaluated. One hundred and six mini-implants in 50 consecutive patients with complete patient records, CBCT information, and T1 radiographs were included in the study. Thirty-four of the 106 mini-implants were considered "failures" resulting in an overall failure rate of 32%. All statistical analyses were performed at the significance level of α = 0.05. A statistically significant relationship between facial type and failure (χ2; p = 0.047) was observed, with a significantly higher failure rate for the brachyfacial patients. The Wilcoxon-Mann-Whitney rank sum test indicated there was no statistically significant relationship between cortical bone thickness (p = 0.227), cortical bone density (p = 0.123), or trabecular bone density (p = 0.059) and mini-implant failure.

LLU Discipline

Orthodontics

Department

Dentistry

School

Graduate Studies

First Advisor

Joseph Caruso

Second Advisor

Craig Andreiko

Third Advisor

Jay Kim

Fourth Advisor

Kitichai Rungeharassaeng

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2008

Date (Title Page)

9-2008

Language

English

Library of Congress/MESH Subject Headings

Dental Implantation, Endosseous -- dissertations; Implants, Experimental; Image Processing, Computer-Assisted -- methods; Tomography, X-Ray Computed -- methods; Bone Density -- physiology; Dental Restoration Failure

Type

Thesis

Page Count

x; 37

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

Download

Share

COinS