ZİRKONYUM DESTEKLİ SABİT PROTETİK RESTORASYONLARDA KLİNİK BAŞARI DEĞERLENDİRME KRİTERLERİ

Abstract

Sabit protetik restorasyonlarda metal destekli seramik restorasyonlar klinik olarak uzun yıllardan beri başarıyla kullanılmalarına rağmen yapısındaki metal alt yapının; restorasyonun ışık geçirgenliğini azaltarak estetik sakıncalara yol açması, özellikle marjinlerde metal-iyon renklenmesi ile gri renkte hoş olmayan bir görüntüye sahip olması, lokal doku reaksiyonuna ve korozyon toksisitesine sebep olabilmesi gibi dezavantajlarından ötürü bu materyal yerine yeni arayışların doğmasını gerektirmiştir. Günümüzde çok sayıda güçlendirilmiş tam seramik sistemi geliştirilmiştir. Güçlendirilmiş tam seramik sistemleri arasında zirkonyum esaslı seramik restorasyonlar, yüksek dayanıklılık ve estetik özelliklerinden dolayı tercih edilirler. Klinikte zirkonyum oksitin kor materyali olarak kullanımı tatminkar optik özellikler, 1000 MPa’ı geçen yüksek bükülme direnci, biyolojik uyumluluğu ve translüsent olması gibi avantajları sayesınde tercih edilmektedir. Bunlardan en yaygın olarak kullanılanı yttrium ile stabilize edilmiş zirkonyum oksit polikristalleridir. Kullanılan materyallerin ve uygulama tekniklerinin başarılarını ve özelliklerini belirleyebilmek, restorasyonların klinik prognozunu belirlemek, restorasyonları oral çevrede değerlendirebilmek amacıyla kontrollü klinik çalışmalara ihtiyaç vardır. Bu nedenle bir takım klinik başarı değerlendirme kriterleri oluşturularak standardizasyona bağlanmıştır. Belli standartlar ölçütünde restorasyonun klinik olarak değerlendirilmesi ve başarısına karar verilmesi mümkündür.

Keywords

• Zirkonyum
• Estetik
• Klinik Başarı

Clinical Success Evaluation Criteria in Zirconia-Based FixedI Prosthesis

Abstract

Although metal-supported ceramic restorations have been clinically used for many years with success in fixed prosthetic restorations, there is a need for an alternative because metal
infrastructures decrease light transmittance, resulting in aesthetic drawbacks. They have a grey colour due to metal–ion colouring, especially in the margins, and they might cause local tissue reaction and corrosion toxicity. Currently, several strengthened all-ceramic systems have been developed. Zirconia-based ceramic restorations are among the preferred strengthened all-ceramic systems due to their high durability and aesthetic characteristics. The use of zirconium oxide as a core material is also clinically preferred due to its advantages such as satisfactory optical properties, bending resistance of over 1000 MPa, biological compatibility and translucency. The most commonly used ones are yttria-stabilised zirconia polycrystals. In order to assess the success and characteristics of used materials and application methods, controlled clinical studies are needed to determine the clinical prognosis of restorations and evaluate restorations in the oral environment. Thus, several clinical success evaluation criteria were created and standardised. It is possible to clinically evaluate restorations and determine their success according to certain standards.

Keywords

• Zirkonya
• Klinik başarı
• Estetik

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