Abstract

The purpose of this pilot study was to evaluate the clinical efficacy of a subperiosteal anchorage device, the palatal OnPlant™, during orthodontic retraction of protruding anterior teeth in cases requiring maxillary premolar extraction. Seven subjects (5 female, 2 male), ages 13 to 55, were selected for the study. The OnPlant was surgically placed in the mid-palatal region through a well-defined subperiosteal tunnel. Following the manufacturer recommended osseointegration period of four months, the OnPlant was uncovered and attached to the first molars by means of a transpalatal bar. Standard orthodontic treatment then commenced to retract the anterior teeth after the first premolars were extracted.

A new volumetric tomography scanner, the NewTom 9000, was used to evaluate the clinical efficacy of the OnPlant. The study design called for records to be taken at two intervals: 1) Following placement of the OnPlant-transpalatal bar, immediately prior to retraction of the anterior dentition and 2) Following completion of retraction as well as any necessary torquing of the maxillary incisors. Limited time allowed only partial treatment for three of the subjects, whose final NewTom records were taken within the retraction phase of treatment.

Six of the OnPlants performed without failure, providing absolute anchorage of the molars during treatment. One OnPlant failed near the end of incisor retraction.

The NewTom proved to be a consistent and reliable tool for evaluating the OnPlant's clinical performance. Future research into the OnPlant and other such skeletal anchorage devices may continue to expose the orthodontic community to the benefits of such devices in cases requiring maximum anchorage.

LLU Discipline

Orthodontics and Dentofacial Orthopedics

Department

Orthodontics and Dentofacial Orthopedics

School

Graduate School

First Advisor

Joseph M. Caruso

Second Advisor

Max Crigger

Third Advisor

Marc Larson

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2003

Date (Title Page)

12-2003

Language

English

Library of Congress/MESH Subject Headings

Orthodontic Anchorage Procedures -- methods; Orthodontic Appliances; Orthodontics, Corrective; Tooth Movement

Type

Thesis

Page Count

xi; 43

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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