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Mechanical Properties of Bone Tissues Surrounding Dental Implant Systems with Different Treatments and Healing Periods

Overview
Specialty Dentistry
Date 2016 Feb 3
PMID 26832783
Citations 6
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Abstract

Objectives: The objective of the current study was to examine whether the nanoindentation parameters can assess the alteration of bone quality resulting from different degrees of bone remodeling between bone tissue ages around the dental implant interface with different treatments and healing periods.

Materials And Methods: Dental implants were placed in mandibles of six male dogs. Treatment groups included: resorbable blast media-treated titanium (Ti) implants, alumina-blasted zirconia implants (ATZ), alumina-blasted zirconia implants applied with demineralized bone matrix (ATZ-D), and alumina-blasted zirconia implants applied with rhBMP-2 (ATZ-B). Nanoindentation modulus (E), hardness (H), viscosity (η), and viscoelastic creep (Creep/P ) were measured for new and old bone tissues adjacent to the implants at 3 and 6 weeks of post-implantation. A total of 945 indentations were conducted for 32 implant systems.

Results: Significantly lower E, H, and η but higher Creep/P were measured for new bone tissues than old bone tissues, independent of treatments at both healing periods (p < 0.001). All nanoindentation parameters were not significantly different between healing periods (p > 0.568). ATZ-D and ATZ-B implants had the stiffer slope of correlation between E and Creep/P of the new bone tissue than Ti implant (p < 0.039).

Conclusions: Current results indicated that, in addition to elastic modulus and plastic hardness, measurement of viscoelastic properties of bone tissue surrounding the implant can provide more detailed information to understand mechanical behavior of an implant system.

Clinical Relevance: Ability of energy absorption in the interfacial bone tissue can play a significant role in the long-term success of a dental implant system.

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