Biyomedikal Alaşımların Yüzey İşlemlerinde Güncel Yaklaşımlar; Lazer İşlemleri

Öz

Günümüzde büyük gelişmelerin gerçekleştiği bir bilim dalı da biyomalzeme bilimidir. Biyomalzemeler, hastalıklı veya hasar görmüş organ ya da dokuların yerine kullanılabilen doğal veya yapay malzemeler olup, bazı durumlarda vücut fonksiyonlarını düzeltmek veya organların fonksiyonelliğini artırmak gibi amaçlarla da kullanılabilen, canlı bir sistemin parçası yerine geçen veya canlı doku ile temas halinde çalışması gereken malzemelerdir. Bilinen malzeme türleri olan metalik, seramik, polimerik ve kompozit malzemerin her birinin biyomalzeme olarak kullanımı mevcuttur. Bunların arasında özellikle mekanik özellikleri açısından öne çıkan metalik biyomalzemeler ve biyomedikal alaşımların uygulama alanları arasında ortopedik implantlar, kırık tedavi vidaları, diş telleri ve dental implantlar gibi pek çok uygulama mevcuttur. Tüm biyomalzemeler gibi, biyomedikal alaşımların da başarısını belirleyen en önemli faktör biyouyumluluklarıdır. Biyolojik sistemlerle ilk temaslarının malzeme yüzeyinde gerçekleşmesi sebebiyle, biyomedikal alaşımların biyouyumluluklarının geliştirilmesinde yüzey işlemleri uygulanması yaygın olarak kullanılan yöntemlerdir. Bu yöntemler arasında lazer yüzey yapılandırma yöntemi biyomedikal endüstrisinde malzemelerin yüzey özelliklerini modifiye etmek için gelecek vadeden, kontaminasyonsuz, temassız ve çevre dostu bir yüzey işlem tekniğidir. Nanosaniye ve femtosaniye lazer ışınlama uygulamaları bu noktada karşımıza çıkmakta ve farklı biyomalzeme alaşımlarının yüzey özelliklerini değiştirmeye olanak tanımaktadır. Bu makale kapsamında nanosaniye ve femtosaniye lazer ışınlamaları etkisiyle biyomalzemelerin yüzey özelliklerindeki değişimler, farklı lazer teknikleri ile yapılan uygulamalar incelenmiş ve sonuçları derlenmiştir.

Anahtar Kelimeler

• Biyomalzeme
• biyouyumluluk
• osseointegrasyon
• lazer yüzey yapılandırma
• nanosaniye lazer
• femtosaniye lazer

Current Approaches in Surface Processing of Biomedical Alloys; Laser Processes

Öz

One of the branches of science where great developments are taking place today is biomaterials. Biomaterials are natural or artificial materials that can be used for the replacement of diseased or damaged organs or tissues, and in some cases they can be used for purposes such as correcting body functions or increasing the functionality of organs, replacing a living system or working in contact with living tissue. The known material types that are metallic, ceramic, polymeric and composite materials are each used as biomaterials. Among these, metallic biomaterials which are especially prominent in terms of their mechanical properties are widely used in many biomedical applications such as orthopedic implants, fracture treatment screws, braces and dental implants among the application areas of metallic biomaterials and biomedical alloys. As in all biomaterials, the most important factor determining the success of biomedical alloys is their biocompatibility. Since their first interaction with the biological systems occurs on the material surface, surface treatments are commonly used methods for improving the biocompatibility of biomedical alloys. Among these methods, the laser surface structuring method is a promising, contamination-free, non-contact and environmentally friendly surface treatment technique to modify the surface properties of materials in the biomedical industry. Nanosecond and femtosecond laser irradiation applications emerge at this point and allow to change the surface properties of different biomaterial alloys. Within the scope of this article, the changes in the surface properties of biomaterials with the effect of nanosecond and femtosecond laser irradiations, applications with different laser techniques were examined and the results were compiled.

Anahtar Kelimeler

• Biomaterial
• biocompatibility
• osseointegration
• laser surface configuration
• nanosecond laser
• femtosecond laser

Kaynakça

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