Geleneksel Sabit ve Hareketli Bölümlü Protezlerde Polieter Eter Keton Kullanımı
Özet
Polieter eter keton (PEEK), protetik diş tedavisinde metallere alternatif olarak öne çıkan, yüksek mekanik, termal ve kimyasal stabiliteye sahip umut vadeden semikristalin bir termoplastik polimerdir. İnsan kemik dokusuna yakın elastik modülü sayesinde çiğneme kuvvetlerini absorbe ederek krestal kemik rezorpsiyonunu önler, implantlar, dayanaklar ve post-kor sistemlerinde titanyuma kıyasla estetik ve biyomekanik avantajlar sunar. Sabit bölümlü protezlerde yüksek ısırma kuvvetlerine dayanabilen hafif ve korozyonsuz bir altyapı materyali işlevi görürken, düşük translüsens özelliği nedeniyle veneerlenerek kullanılır. Geleneksel hareketli bölümlü protezlerde ise krom-kobalt alaşımlarının ağırlık, metalik tat ve estetik olmayan görüntü gibi dezavantajlarını ortadan kaldırarak ana/minör bağlayıcı, okluzal tırnak ve kroşe materyali olarak tercih edilmektedir. CAD/CAM sistemleriyle bilgisayar destekli olarak kolayca frezelenebilen ve cilalanabilen PEEK, hafifliği, düşük plak formasyonu, yüksek aşınma direnci ve mükemmel biyouyumluluğu ile dikkat çekmektedir. Gelecekte titanyum ve alaşımlarının yerini alabileceği öngörülen bu materyalin klinikteki başarısını ve uzun dönemli etkilerini tam olarak değerlendirebilmek için daha fazla uzun süreli klinik çalışmaya ihtiyaç duyulmaktadır.
Polyether ether ketone (PEEK) is a promising semi-crystalline thermoplastic polymer in prosthetic dentistry with high mechanical, thermal, and chemical stability, serving as an alternative to metals. Due to its elastic modulus close to human bone tissue, it absorbs masticatory forces and prevents crestal bone resorption, offering aesthetic and biomechanical advantages over titanium in implants, abutments, and post-core systems. In fixed partial dentures, it functions as a lightweight and corrosion-free framework material capable of withstanding high biting forces, though it requires veneering due to its low translucency. In traditional removable partial dentures, it is preferred as a major/minor connector, occlusal rest, and clasp material, eliminating disadvantages of chrome-cobalt alloys such as weight, metallic taste, and unesthetic appearance. Extensively milled and polished via CAD/CAM systems, PEEK stands out with its lightweight structure, low plaque formation, high wear resistance, and excellent biocompatibility. Anticipated to replace titanium and its alloys in the future, more long-term clinical studies are required to fully evaluate the clinical success and long-term effects of this material.
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