In Vitro Evaluation of Retention in Conical Retained Dentures by Usage of Metal Primer with Metal and Plastic Resin Based Seconder Crowns

Abstract

Aim: Conical crown retained dentures has been widely and increasingly used especially in patients with periodontal problems. The studies about conical crown prosthesis are regarding indications and construction types of the prosthesis. The studies about the retention and loss of retention by usage are few. The aim of this study is to evaluate the changes in retention by usage of plastic resin based superstructures in conical crown retained dentures. In this in vitro study, 10 samples in each group are prepared for three different seconder crown material, in four different tooth groups.

Method: The primer crowns are prepared to have 2°of angles are casted form Cr-Ni alloy. The superstructures are also made of Cr-Ni alloy, Acetal D and Vectris materials. The insertion and separation motion of the dentures were simulated by the experiment device which is specially designed by Caniklioğlu. The first retention forces in crowns were measured and then the values were noted after the insertion and separation procession of 500, 1500, 3500 times.

Findings: In this study, we achieve to compare the loss of retention forces in three different seconder crown materials in the usage of 24 months.

Conclusion: The results show that the seconder crowns made of metal have the best retention values and the least retention decrease per cent is shown by Vectris seconder material.

Keywords

• Dental prosthesis,prosthesis retention,asetal-dental,dental

Konus Kuronlarda Metal Primer ile Metal ve Plastik Sekonder Kuronlarda Tutunma Kuvvetinin in Vitro Olarak İncelenmesi

Abstract

Amaç: Periodontal problemi olan hastalarda konus kuronlu protez kullanımı oldukça yaygındır ve artmaktadır. Konus kuronlu protezler konusundaki çalışmalar çoğunlukla protezin yapım yöntemleri ve endikasyonu ile ilgilidir. Protezin kullanımına ait tutunma kuvveti kayıpları ile ilgili çalışmalar sınırlı sayıdadır. Çalışmada konus kuronlu protezlerde plastik esaslı malzemelerden yapılmış sekonder kuronların kullanıma bağlı tutunma kayıpları üzerine çalışılmıştır. İn vitro deneylerde dört diş grubundan, üç değişik sekonder kuron malzemesi ile 10’ar adet örnek kullanılmıştır.

Yöntem: Cr-Ni alaşımdan 2°’lik açı ile primer kuronlar hazırlanmış ve üzerlerine Cr-Ni alaşımı, Vectris ve Asetal-D malzemelerinden sekonder hazırlanmıştır. Caniklioğlu tarafından tasarlanan aygıt kullanılarak protezin takılıp çıkartılma işlemleri taklit edilmiştir. Kuronların ilk tutunma kuvvetleri ölçülmüş daha sonra 500, 1500 ve 3500 takıp çıkartma sonucundaki tutunma kuvveti değerleri tablolara not edilmiştir.

Bulgular: Bu çalışma bize 24 aylık protez kullanımı sonucunda meydana gelen tutunma kuvvetlerini ve kayıplarını karşılaştırma imkanı vermiştir.

Sonuç: En iyi tutunmanın metal sekonder kuronlarda olduğu, tutunma kayıplarında en düşük yüzde değerlerinin ise Vectris sekonder kuronlarda olduğu sonucuna varılmıştır.

Keywords

• Diş protezi,protez retansiyonu,asetal-dental,dental

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