Diz Eklem Protezlerinde Kullanılan UHMWPE Insert Bileşeni için Aşınma Durumunun Diz Eklem Protezi Aşınma Test Simülatörü İle İncelenmesi

Year 2020, Volume: 10 Issue: 1, 15 - 21, 15.01.2020

Ender Emir , Erkan Bahçe , Mehmet Sami Güler

https://doi.org/10.17714/gumusfenbil.546915

Abstract

Günümüzde bireylerin diz ekleminde trafik
kazaları, spor yaralanmaları ve kıkırdak yapısında meydana gelen deformasyon
sonucunda cerrahi operasyonlarda diz eklem protezleri yoğun olarak
kullanılmaktadır. Ancak kullanım şartlarına bağlı olarak protez bileşenlerinde
oluşabilecek hataların belirlenebilmesi gerekmektedir. Bu çalışmada kullanım
esnasında diz eklem protez bileşenlerinden biri olan yüksek moleküler
yoğunluklu ultra hafif polietilen (UHMWPE) insert bileşeninde meydana gelen
hata durumlarının gözlemlenebilmesi amaçlandı. Bu nedenle diz simülatörü ile
aşınma testi 1x10⁶, 2x10⁶ ve 3x10⁶ olmak üzere
üç farklı çevrim sayısında gerçekleştirildi. Testlerin sonunda UHMWPE insert medial
ve lateral kondillerden mikroskop görüntüleri ve kütle kaybı ölçümleri alındı.
Elde edilen bulgularda çevrim sayısının artışına bağlı olarak UHMWPE insert bileşeni
üzerinde farklı eksenlerdeki tekrarlı kuvvetler sonucunda çukurcuk aşınmalarının,
kılcal çatlakların, çiziklerin, yığılmış partiküllerin ve kütle kayıplarının belirgin
bir şekilde oluştuğu görüldü. 

Keywords

Diz Eklem Protezi, Kütle Kaybı, UHMWPE Insert, Yüzey kalitesi

Investigation of the Wear Condition for the UHMWPE Insert Component Used in Knee Joint Prosthesis with Knee Joint Prosthesis Wear Test Simulator

Abstract

Today, knee joint prosthesis is used
extensively in surgical operations as a result of traffic accidents, sports
injuries and in the deformation of the cartilage structure in the knee joint of
individuals. However, depending on the conditions of use, it is necessary to
determine the defects that may occur in the prosthetic components. In this
study, it is aimed to observe the error mechanisms of ultra high molecular
weight polyethylene (UHMWPE) insert component which is one of the knee joint
prosthesis components during use. Therefore, the wear test with knee simulator
was carried out in three different cycles; 1x10⁶, 2x10⁶
and 3x10⁶. At the end of the tests, microscop images and mass loss
measurements were taken from the medial and lateral condyles of the UHMWPE
insert. According to the results, it is seen that due to the increase in the
number of cycles, it is seen that pitting wear, capillary cracks, scratches,
agglomerated particles and mass losses occur as a result of repetitive forces
on different axes on UHMWPE insert component.

Keywords

Knee Joint Prosthesis, Mass Loss, UHMWPE Insert, Surface Quality

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