Turkiye Klinikleri Journal of Dental Sciences

.: ORIGINAL RESEARCH
Hibrid Abutment Kron Restorasyonlarda İmplant-Abutment Bağlantısının İmplant, Abutment ve Bazal Vidadaki Stres Dağılımı Üzerindeki Etkisinin İncelenmesi
Evaluation of the Effect of Implant-Abutment Connection in Hybrid Abutment Crown Restorations on Stress Distribution in the Implant, Abutment, and Basal Screw
Necati KALELİa, Çağrı URALb
aİstanbul Medeniyet Üniversitesi Diş Hekimliği Fakültesi, Protetik Diş Tedavisi ABD, İstanbul, TÜRKİYE
bOndokuz Mayıs Üniversitesi Diş Hekimliği Fakültesi, Protetik Diş Tedavisi ABD, Samsun, TÜRKİYE
Turkiye Klinikleri J Dental Sci. 2020;26(1):43-50
doi: 10.5336/dentalsci.2019-65186
Article Language: TR
Full Text
ÖZET
 Amaç: İmplant üstü hibrid abutment kron (HAK) restorasyonlarda, Tibase abutment-implant bağlantısının implant, abutment ve bazal vida üzerindeki stres dağılımına olan etkisinin karşılaştırmalı olarak incelenmesidir. Gereç ve Yöntemler: Bu sonlu elemanlar analiz (SEA) çalışmasında, normal ve geniş platformlu iki farklı doku seviyesi implant ve bir kemik seviyesi implant sistemi modellenmiştir. Doku seviyesi ve kemik seviyesi implantlar, Ti-base abutmentlar ve vidaların orijinal parçaların üç boyutlu (3B) modellemeleri yapıldıktan sonra, implant modelleri sağ üst molar bölgeyi temsil eden kemik modellerine yerleştirilmiştir. Her implant için iki farklı boyda Ti-base abutment ve Ti-base abutment boylarına göre 6 mm ve 8 mm kron yüksekliklerinde sağ üst 1. molar kron restorasyonu modellemesi yapılmıştır. Toplamda üç farklı implant ve iki farklı boyda Ti-base abutment için 6 farklı HAK modeli oluşturulmuştur. Her modele 200 N dikey yükleme ve 100 N oblik yükleme yapılmıştır. İmplant, abutment ve bazal vidadaki stres dağılımı von Mises stres analizi ile değerlendirilmiştir. Bulgular: Oblik yükleme sonucu dikey yüklemeye göre daha yüksek stres değerleri elde edilmiştir. Kron boyunun artmasıyla birlikte stres değerlerinde oblik yükleme altında belirgin bir artış gözlenmiştir. İmplantlardaki en yüksek stres değerleri normal platformlu doku seviyesi implantlarda gözlenirken, abutment ve bazal vidalardaki en yüksek stres değerleri kemik seviyesi implantlar üzerindeki modellerden elde edilmiştir. Sonuç: İmplant-abutment bağlantı tasarımı HAK restorasyonlarda implant, abutment ve bazal vidadaki stres dağılımını etkilemiştir.

Anahtar Kelimeler: Hibrit abutment kron; Ti-base abutment; vida tutuculu restorasyon
ABSTRACT
 Objective: The purpose of this study is comparative evaluation of the effect of Ti-base abutment-implant connection on stress distribution in implant, abutment, and basal screw in implant-supported hybrid abutment crown (HAC) restorations. Material and Methods: Two different tissue-level implants with normal platform and wide platform, and a bone-level implant system were modeled. After three-dimensional (3D) modeling of the original parts of tissue-level and bone-level implants, Ti-base abutments, and screws, the implant models were placed into bone models representing the maxillary right molar region. Two different height of Ti-base abutment and two different height of maxillary right first molar crown restoration (6 mm and 8 mm) were modeled for each implant. A total of 6 HAC models were designed according to three different implants and two different height of Ti-base abutments. Each model was loaded vertically (200 N) and obliquely (100 N). The stress distribution in the implant, abutment, and basal screw was evaluated through the von Mises stress analysis. Results: The oblique load resulted in higher stress values than in vertical load. The increase in the crown height considerably increased the stress values under oblique loading. The tissue-level implant with normal platform exhibited the highest stress values among the implant models, and the bone-level abutment and basal screw exhibited the highest stress values among the abutment and basal screw models. Conclusion: The design of implant- abutment connection affected the stress distribution in the implant, abutment, and basal screw in HAC restorations.

Keywords: Hybrid abutment crown; Ti-base abutment; screw-retained restoration
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