Determination of Micromotion at the Implant Bone Interface - An In-Vitro Methodologic Study

Matthias Karl Friedrich Graef

doi:10.4172/2161-1122.1000289

Abstract

Dental implants lacking primary stability show increased levels of micromotion which may result in fibrous encapsulation instead of osseointegration. A novel experimental technique has been used for directly measuring implant displacement as a consequence of occlusal loading. Implants were inserted in bone surrogate material differing in density thereby measuring insertion torque and implant stability by means of resonance frequency analysis. Implants placed in bone with a density of 10 pcf and loaded with a mean force of 62.7 N showed maximum mean displacement of 71.9 μm. Significant differences in micromotion resulted from placing implants in bone with varying densities. Measurements of implant insertion torque correlated well with measurements of implant displacement. Implant stability measurements of specific implants showed consistency, no correlation between implant stability and maximum implant displacement could be established. It appears that a reliable assessment of bone quality may be best used for predicting micromotion at the implant-abutment interface.

Highlights

Achieving sufficient primary stability is one of the most important goals during dental implant surgery [1]
In case of a lack of primary stability, any forces potentially acting on an implant may lead to a displacement of the implant relative to the bony socket what is described by the term micromotion [6,7]
A total of (n=5 per group) bone level implants (Figure 1a) with diameters of 4.7 mm at the shoulder and 3.7 mm at the apex and a length of mm (SCI-BioActive; AlfaGate; KfarQara, Israel) were placed in bone surrogate materials (Figure 1b) differing in density

Summary

Introduction

Achieving sufficient primary stability is one of the most important goals during dental implant surgery [1]. In case of a lack of primary stability, any forces potentially acting on an implant may lead to a displacement of the implant relative to the bony socket what is described by the term micromotion [6,7]. The risk of jeopardizing osseointegration has been minimized by applying late loading protocols for implant-supported reconstructions [15]. With the goal of shortening treatment times, novel concepts predominantly focus on early and immediate loading protocols [9]. Micromotion at the bone-implant interface has gained increased recognition as a potential risk factor [15,16]

Methods

Results

Discussion

Conclusion