Abstract

The aim of the study was to evaluate the effect of an experimental two piece scalloped implant design with a scalloped elliptical coronal part and an HA surface treatment on the bone to implant contact percentage in comparison to a commercially available HA treated implant. The possibility of bone apposition / retention along the exposed coronal scalloped part and the effect of the presence of a junction on the bone to implant contact percentage and bone apposition / retention were analyzed. 10 rabbits were included in the study with each rabbit receiving one control implant in one tibia and one experimental implant (experimental implant) in the other. Rabbits were divided in two groups:

Group one: consisted of 6 rabbits. The experimental implants were placed with all second scalloped part (4mm) above the existing bone level compared to the control implant that received a 3mm healing abutment placed above the existing bone level. No membrane or grafting material was used and the periosteam and tissue were sutured over the implants. Group two: Consisted of 4 rabbits. The experimental implants were placed with only the scalloped platform (2mm) above the existing bone level compared to the control implants that received a cover screw. No membrane or grafting material was used and the periosteam and tissue were sutured over the implants. Sites were allowed to heal for 27days after which the animals were sacrificed and gross samples were prepared and sent for histomorphometric analysis. BIC% was measured twice for each group, once from the top of the implant to the inferior border of the superior cortical plane and the second over the whole length of the implant. The effect of the presence of a junction between the implant parts and the level of the junction in relation to bone apposition was evaluated. There was no statistically significant difference between the BIC% of the implants and the control implants in both groups one and two, however the bone was better adapted along the second scalloped part of the experimental implant than around the healing abutment of the control implant. It was also possible to gain bone apposition / retention around the second part of the experimental implant and beyond the existing native bone level provided that space can be maintained; it was consistent up to 2mm above the native bone level. The presence of a junction between part one and part two had no effect on bone apposition / retention.

LLU Discipline

Implant Dentistry

Department

Implant Dentistry

School

Graduate Studies

First Advisor

Jaime L. Lozada

Second Advisor

Charles J. Goodacre

Third Advisor

Periklis Proussaefs

Fourth Advisor

Phillip J. Boyne

Fifth Advisor

Juan C. Abarno

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2009

Date (Title Page)

3-2009

Language

English

Library of Congress/MESH Subject Headings

Dental Implantation, Endosseous -- methods -- dissertations; Dental Abutments; Implants, Experimental; Rabbits; Bone Density; Bone Development; Bone Regeneration; Osseointegration -- physiology; Prospective Studies; Dental Stress Analysis; Osseointegrated dental implants -- Design; Osseointegrated dental implants -- Materials; Osseointegrated dental implants -- Technique

Type

Dissertation

Page Count

xii; 56

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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