Assessment of the cortical bone thickness using ultrasonic guided waves: Modelling and in vitro study

Background. Usefulness of ultrasound (US) in detection of intrabony lesions has been showed. A cortical bone perforation or a very thin and intact cortical bone is prerequisite for this purpose.Objective. The current in vitro study was aimed at measuring the cut-off thickness of the overlying cortical bone which allows ultrasonic assessment of bony defects.Materials and Methods. 20 bovine scapula blocks were obtained. Samples were numbered from 1 to 20. In each sample, 5 artificial lesions were made. The lesions were made in order to increase the overlying bone thickness, from 0.1 mm in the first sample to 2 mm in the last one (with 0.1 mm interval). After that, the samples underwent ultrasound examinations by two practicing radiologists.Results. All five lesions in samples numbered 1 to 11 were detected as hypoechoic area. Cortical bone thickness more than 1.1 mm resulted in a failure in the detection of central lesions.Conclusion. We can conclude that neither bony perforation nor very thin cortical bones are needed to consider US to be an effective imaging technique in the evaluation of bony lesion.

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Simultaneous estimation of cortical bone thickness and acoustic wave velocity using a multivariable optimization approach: Bone phantom and in-vitro study

Ultrasonics ◽

10.1016/j.ultras.2015.10.013 ◽

2016 ◽

Vol 65 ◽

pp. 105-112 ◽

Cited By ~ 5

Author(s):

Yuriy Tasinkevych ◽

Jerzy Podhajecki ◽

Katarzyna Falińska ◽

Jerzy Litniewski

Keyword(s):

Acoustic Wave ◽

Cortical Bone ◽

Wave Velocity ◽

In Vitro Study ◽

Simultaneous Estimation ◽

Optimization Approach ◽

Bone Thickness ◽

Acoustic Wave Velocity ◽

Cortical Bone Thickness

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The Effect of High Energy Shock Waves Focused on Cortical Bone: An in Vitro Study

Journal of Surgical Research ◽

10.1006/jsre.1993.1008 ◽

1993 ◽

Vol 54 (1) ◽

pp. 46-51 ◽

Cited By ~ 73

Author(s):

D.M.K.S.Kaulesar Sukul ◽

E.J. Johannes ◽

E.G.J.M. Pierik ◽

G.J.W.M. van Eijck ◽

M.J.E. Kristelijn

Keyword(s):

Shock Waves ◽

Cortical Bone ◽

In Vitro Study ◽

High Energy ◽

Vitro Study

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Effects of a newly designed apparatus on orthodontic skeletal anchorage

European Journal of Dentistry ◽

10.4103/1305-7456.119082 ◽

2013 ◽

Vol 07 (S 01) ◽

pp. S083-S088 ◽

Cited By ~ 1

Author(s):

Murat Tozlu ◽

Didem Nalbantgil ◽

Fulya Ozdemir

Keyword(s):

Cortical Bone ◽

Lateral Displacement ◽

Tangential Force ◽

Testing Machine ◽

In Vitro Study ◽

Vitro Study ◽

Favorable Effect ◽

Control Group ◽

Insertion Torque

ABSTRACT Objective: An appliance was designed to increase the cortical bone surface contact area of miniscrew implants (MSIs). The purpose of this in vitro study was to evaluate the effects of this appliance on the anchorage force resistance and the stability of orthodontic MSIs. Materials and Methods: A total of 48 MSIs were placed into bone specimens prepared from the ilium of bovines. Half were placed with the newly designed apparatus and half were placed conventionally. All the specimens were subjected to tangential force loading perpendicular to the MSI with lateral displacement of 0.6 mm, using an Instron Universal Testing machine. The maximum removal torque of each tested specimen was also recorded. Both study and control groups were divided into two subgroups based on whether they had thin and thick cortical bone. Results: The test group had statistically higher force anchorage resistance and maximum insertion torque values than the control group (p < 0.001). The results were found to be more significant in cases in which the cortical bone was thin (p < 0.001). Conclusions: Within the limits of this in vitro study, the present findings suggest that the newly designed apparatus might have a favorable effect on MSI stability in patients presenting with thin cortical bone. Clinical studies are necessary to confirm the results that were observed in vitro.

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