Jason M. Loop

Abstract

The purpose of this study was to evaluate the relationship between facial type and cortical bone thickness (mm), cortical bone density (rHU) and trabecular bone density (rHU) in the mandibular alveolar bone. Twenty-five consecutive dolichofacial, 25 consecutive mesiofacial, and 25 consecutive brachyfacial patients with T1 lateral cephalograms and CBCT scans were used in this study. A Ricketts analysis was used to compute the VERT index for each patient. All statistical analyses were performed at the significance level of α = 0.05. The one-way ANOVA and LSD post hoc tests indicated there was a statistically significant relationship between facial type and buccal cortical bone thickness (BCBT) [(p = 0.015) with B>D (p = 0.004)], buccal cortical bone density (BCBD) [(p = 0.012) with B>M (p = 0.040) and B>D (p = 0.004)], and buccal trabecular bone density (BTBD) [(p < 0.0001) with B>D (p < 0.0001) and M>D (p < 0.0001)]. The two-tailed Pearson Correlation test indicated there was a statistically significant relationship between VERT index and BCBT (p < 0.0001, R2 = 0.524), BCBD (p < 0.0001, R2 = 0.398), and BTBD (p < 0.001, R2 = 0.457). This study showed a relationship exists between facial type and mandibular alveolar bone; notably that more horizontal facial patterns have relatively thicker and denser mandibular buccal cortical bone and denser trabecular bone compared with more vertical facial patterns. There is an indication to predrill TAD placement sites in the posterior region of brachyfacial patients.

LLU Discipline

Orthodontics and Dentofacial Orthopedics

Department

Orthodontics and Dentofacial Orthopedics

School

Graduate Studies

First Advisor

Joseph Caruso

Second Advisor

Craig Andreiko

Third Advisor

Jung-Wei Chen

Fourth Advisor

Kitichai Rungcharassaeng

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2008

Date (Title Page)

12-2008

Language

English

Library of Congress/MESH Subject Headings

Orthodontics, Corrective -- dissertations; Alveolar Bone Loss; Alveolar Process; Bone Density; Facial Bones; Vertical Dimension; Mandible -- physiology; Cone-Beam Computed Tomography; Dental Occlusion; Dental Implants; Cephalometry -- methods; Radiography, Dental -- methods

Type

Thesis

Page Count

xi; 46

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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