TOMURCUK ÖVÜL KÜMBÜLOĞLU, Yasemin KULAK-ÖZKAN, Tuğberk ARDA, Mutlu ÖZCAN

Retention and Deformation of CobaltChromium and High-Impact Polyamide Clasps

Objective: The use of metal clasps especially in anterior region may cause aesthetic problems. Polyamide resin has been suggested as an alternative aesthetic denture clasp material. This study compared the retentive force and deformation of cobaltchromium and polyamide clasps after 36 months of simulated clinical use. MaterialsandMethods: The retentive force for clasp removal was measured in distilled water using a custom-made apparatus with intervals corresponding to 0, 6, 12, 18, 24, 30 and 36 months of simulated clinical use. The distance (mm) between the retentive and reciprocal clasp tips was measured using a microscope before and after the insertion-removal procedures. Results: Significant difference was observed in distance between clasp tips for metal clasps between baseline and 36 months for molars and premolars (p

Kobalt-Krom ve Yüksek Etkili Poliamid Kroşelerin Deformasyonları ve Retantif Kuvveti

Amaç: Metal kroşelerin kullanımları özellikle anterior bölgede ise estetik problemlere yol açabilir. Poliamid rezinin yeni bir tipi alternatif estetik bir dental kroşe materyali olarak kullanılmaya başlamıştır. Bu çalışmanın amacı kobalt-krom kroşeler ile poliamid kroşelerin 36 aylık kullanım periyodu sonunda retantif kuvvetlerinin ve deformasyonlarının karşılaştırılmasıdır. Gereç ve Yöntemler: Kroşelelerin retantif kuvvetleri distile su içerisinde, özel tasarlanmış, yerleştirme-çıkarma mekanizmasıyla çalışan bir test aparatı yardımıyla ölçüldü. Klinik uygulamanın simülasyonu elde edilip bu aparat yardımıyla 0, 6, 12, 18, 24, 30 ve 36. aylarda ölçüm yapıldı. Yerleştirip çıkartma testinden önce ve sonra bir mikroskop yardımıyla kroşenin retantif ve resiprokal kolları arasındaki mesafe mm cinsinden ölçüldü. Bulgular: Otuz altı ayın sonunda premolar ve molarlarda metal kroşe tiplerinin kendi aralarındaki karşılaştırılmalarında resiprokal ve retantif kollar arasındaki mesafede önemli ölçüde farklılıklar gözlendi. Ek olarak yine molar ve premolar dişlerde 36 ay sonunda metal kroşelerin retantif kuvvetinde önemli değişim gözlenirken, poliamid kroşelerde hiçbir retantivite farkı gözlenmedi. Sonuç: Poliamid kroşeler özellikle premolarlarda kobalt-krom kroşelere alternatif olabilir.

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