Klavikula Kırıklarında Plak Uygulamasının Yerleşim Konumuna Göre Yorulma Davranışının Sonlu Elemanlar Yöntemi ile İncelenmesi

Year 2019, , 69 - 74, 01.03.2019

Levent Uğur , Selami Karadeniz Arif Özkan Alper Gültekin

https://doi.org/10.2339/politeknik.466176

Abstract

Amaç; Klavikula, omuz ve kolun
hareketlerinde önemli bir göreve sahip olan anatomik bir yapıdır. Klavikula
kırıkları iskelet sistemi yaralanmaları içerisinde sık karşılaşılan bir
problemlerdendir. Klavikula kırıklarında, kırığın türüne göre çeşitli
implantlar kullanarak omuzun ağrısız ve fonksiyonlarını en uygun düzeye
getirmek asıl amaçtır. Bu çalışmada klavikula kırıklarında
kullanılan anatomik plak uygulamasının biyomekanik açıdan incelenmesi
amaçlanmıştır.

Yöntem; Bu çalışmada, DICOM
formatında bilgisayarlı tomografi görüntüleri kullanılarak normal anatomiye
sahip klavikula modellenmiş ve klavikula üzerinde kırık hattı oluşturularak
superior ve anteriora plak yerleştirilmiştir. Plaklarda meydana gelen
gerilmeler, oluşturulan modeller üzerine eksenel kompresyon ve konsol bükme
yüklemeleri uygulanarak non-lineer sonlu elemanlar yöntemi ile incelenmiştir.
Analizler, ANSYS (surum 18) sonlu elemanlar programında yapılmış ve
tüm modellerde aynı sınır şartları uygulanmıştır.

Bulgular; Analizlerde plaklar
üzerinde meydana gelen maksimum eşdeğer gerilmelere (MES) bakılmış ve özellikle
anteriora yerleştirilen plakta gerilmenin azaldığı tespit edilmiştir. Klavikula
üzerine yerleştirilen plakların konumlarına göre yorulma davranışları
karşılaştırılmıştır.

Sonuçlar; Bu çalışmada,
klavikulanın anteriorüne yerleştirilen plaklarda gerilmenin daha az olduğu
sonlu elemanlar yöntemi ile gösterilmiştir. Ayrıca, anterior bölgeye
yerleştirilen plakların en uzun ömre sahip olmasından dolayı kırılma kararlığı
açısından daha güvenli olduğu belirlenmiştir.

Keywords

Omuz, klavikula, plak, Sonlu Elemanlar Analizi

Investigation of Fatigue Behaviour Of Plate Applications In Clavicle Fractures By Finite Element Method According to The Plate Replacement Position

Abstract

Background:
The clavicle is an anatomical structure whıch has an important role on the
movements of the shoulder and arm. Clavicular fractures are a common problem in
skeletal system injuries. The main purpose is to achieve a painless shoulder
joint and to optimise its function ıin clavicle fractures.n this study, it was
aimed to investigate biomechanically the application of anatomic plaque used in
clavicle fractures.Methods: In this study, a normal anatomical clavicle was
modeled using computed tomography images in DICOM format, a fracture line was
created on the clavicle and the plate was placed superiorly and anteriorly.The
stresses on the plates under axial compression and console bending were
investigated on the formed models by using finite element method. Analyzes were
made non-linear using ANSYS (v.18) and same limit conditions were applied in
all models. Findings: The maximum equivalent stresses (MES) on the plaques were
observed in the analyzes and it was found that the tension on the plaque,
especially placed anteriorly, decreased.Fatigue behaviours were compared
according to the positions  of the plates
placed on the clavicle. Results: In this study, the finite element method was
used which showed less tension on the plates placed on the anterior of the
clavicle.It was also found that the plates placed in the anterior region were
safer in terms of fatigue fracture stability due to longest longevity of the
plates.

Keywords

Shoulder, clavicle, plate, finite element analysis

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