Erkan BAHÇE, Ali Kemal ASLAN, Mehmet Sami GÜLER, Neşe ÇAKIR, Ender EMİR

Kalça Protezinin Aşınma Özellikleri Üzerinde Çoklu Tabakalı Kaplanmasının Etkilerinin Sonlu Elemanlar Metoduyla Nümerik Analizi

Total kalça protezi uygulamalarında kullanılan metal alaşımlarının kullanım sürelerinin artırılmasına yönelik çalışmalar gelişen tıp ve malzeme teknolojileriyle beraber devam etmektedir. Metal alaşımları vücut sıvısı içerisinde bulunan çeşitli iyonlar, mineraller ve proteinlerle etkileşime girerek korozyon ve metal iyonizasyonuna uğramaktadır. Bunun sonucunda ise polietilen bileşen kullanım ömründen erken aşınmaya maruz kalmaktadır. Kalça protezlerinde kullanılan metal bileşenlerin korozyon dayanımının artırılması ve iyonizasyonun önlenmesi için seramik bileşenlerle kaplanmaktadır. Bu çalışmada kalça protezlerinde yaygın olarak kullanılan metal-polietilen çifti Ti6Al4V-ultra yüksek moleküler ağırlıklı polietilen bileşenlerinin aşınma özellikleri incelenmiştir. Metal femur başının çoklu tabakalı kaplanmasının ve tabaka sayısının polietilen asetabular linerin aşınması üzerindeki etkileri nümerik olarak ANSYS programı yardımıyla incelenmiştir. Elde edilen sonuçlar, metal femur başının çoklu tabakalı kaplanmasının polietilen bileşeninin aşınma dayanımını artıracağı görülmüştür.

Anahtar Kelimeler:

Kalça Protezi, Bio malzeme, Ti6Al4V, Çoklu tabakalı kaplama, Aşınma, ANSYS

Numerical Analysis of Effect of Multilayer Coating on the Wear Properties of Hip Prosthesis by Finite Element Method

Researches on increasing the lifetime of metal alloys used in total hip replacement applications, continue in parallel with developing medicine and material engineering. Metal alloys expose to the corrosion and ionization by interacting with the ions, proteins, and minerals in the body fluid. As a result of this, polyethylene component of the hip prosthesis exposes to early wear. Metal components of the hip prosthesis are coated with ceramic materials in order to avoid metal ionization and enhance the corrosion resistance. In this study, the wear properties of widely used Ti6Al4V-UHMWPE metal-polyethylene couple in the hip prosthesis is investigated. The effect of the coating of metal femoral head and the effect of layer number on the wear of polyethylene acetabular liner is numerically studied by ANSYS software. Results showed that the multilayer coating of metal femoral head will increase the wear resistance of the polyethylene component.

Keywords:

Hip; Bio material, Ti6Al4V, Multilayer coating, Wear, ANSYS,

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