Abstract

Poor bone quality at an implant site and the lack of initial implant immobilization are considered the two main factors for first stage implant failure. Modalities are needed to improve the initial stability of implants in poor bone quality situations. The purpose of this study was to compare the immediate implant stability and the pull-out force of implants placed in fresh frozen human alveolar jaw bones by two different surgical techniques: 1) a conventional drilling technique and 2) a trabecular compaction technique. The initial lateral stability (assessed by Periotest values, PTVs), the uniaxial pull-out force (measured by Instron machine) and the radiodensity (Hounsfield numbers) of immediately placed implants were investigated in a split mouth design. The mean PTV of implants placed by the trabecular compaction technique was -0.58 in the maxilla and -4.58 in the mandible, 6.62 and 1.08 by the conventional drilling technique, respectively. The mean PTV of implants placed by the trabecular compaction technique was statistically lower than that of implants placed by the conventional drilling technique. The mean pull-out force for the trabecular compaction technique was 100.65 N in the maxilla and 414.64 N in the mandible, and that for the conventional drilling technique was 82.21 N and 195.13 N, respectively. The pull-out force revealed no statistically significant difference in the maxilla, however, statistically significant higher pull-out force was found in the mandible. The mean Hounsfield numbers for implant sites used for the trabecular compaction technique was 526.64 in the maxilla and 741.59 in the mandible, 375.14 and 760.75, respectively, for sites used for the conventional drilling technique. There were no differences between the sites. There was a statistically strong correlation between the PTVs and the pull out forces regardless of the surgical technique both in the maxilla and the mandible. No statistical correlation was found between the pull-out forces and the density, PTVs and the density both in the maxilla. There was a strong correlation among the parameters in the mandible. The results of this study suggest that the trabecular compaction technique provides higher initial stability to the implant in comparison with the conventional drilling technique.

Department

Dentistry

School

Graduate School

First Advisor

Subrata Saha

Second Advisor

Jaime Lozada

Third Advisor

Philip Boyne

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1995

Date (Title Page)

9-1995

Language

English

Library of Congress/MESH Subject Headings

Dental Implants -- methods; Dental Implantation -- methods; Dental Implantation, Endosseous; Dental Implantation, Endosseous, Endodontic

Type

Thesis

Page Count

2 vii; 69

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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