All-On-Four Konseptine Göre Farkli Materyaller İle Üretilmiş Sabit Dental Protezlerin Stres Analizleri

Year 2019, , 183 - 191, 31.12.2019

Ahmet Çalışkan , İsa Yöndem

https://doi.org/10.34084/bshr.647860

Cited By: 4

Abstract

Amaç: İmplant destekli
sistemlerin protez tesliminden sonra uzun vadeli başarısını etkileyen en önemli
faktör biyomekaniktir. Bu çalışmanın amacı, atrofik mandibulada All-On-4
tekniğine göre yerleştirilen implantlarla farklı alt yapı materyalleri
kullanılarak tasarlanan protez restorasyonlarını farklı stres analiz yöntemleri
ile incelemek ve yöntemleri karşılaştırmaktı.

Yöntem: Bu amaçla,
All-On-4 konseptine göre foto-elastik bir rezin model hazırlandı. Ölçü
alındıktan sonra, fiberle güçlendirilmiş rezin, PEEK, zirkonya ve metal alt
yapılar Cad / Cam ile üretildi. Foto elastik stres analizi yapıldı. Öte yandan,
aynı alt yapıların 3 boyutlu sanal modelleri, CAD'in .stl verileriyle
oluşturuldu. Daha sonra aynı koşullar altında sonlu elemanlar stres analizi
uygulanmıştır.

Bulgular: Fotoelastik ve sonlu
elemanlar stres analizinde metal ve zirkonya gibi sert alt yapılar PEEK ve
fiber gibi elastik materyallere göre daha düşük stres değerleri göstermiştir.
Sonlu elemanlar analizi  imkanlarıyla alt
yapıların iç gerilmeleri değerlendirildi. Düşük elastik modüllü fiber ve PEEK
altyapılarında düşük gerilimler gözlendi.

Sonuç: Altyapının
elastikiyet modülü arttığında implantlara iletilen stresler azalmaktadır. Malzemelerin
iç gerilmeleri değerlendirildiğinde, düşük elastik modüllü, fiber ve PEEK gibi
altyapılarda düşük gerilmeler görülmektedir. Fotoelastik ve sonlu elemanlar stres analizleri implant ve çevre
dokularda benzer stres sonuçları vermiştir. Yani sonuçlar birbirini
desteklemiştir.

Keywords

All-On-4, Alt Yapı, Dental İmplant, Stres Analizi

Supporting Institution

Selçuk Üniversitesi

Project Number

18202053

Stress Analysis Of Fixed Dental Prostheses Produced With Different Materials According To The All-On-Four Concept

Abstract

Objective: The most
important factor affecting the long-term success of implant supported systems
is biomechanics after prosthesis delivery.
The aim of this study was to investigate the prosthetic restorations
designed by using different substructure materials on the implants placed
according to All-On-4 technique in atrophic mandible with different stress
analysis methods and compare the methods each other.

Methods: For this
purpose, a photo-elastic resin model, according to All-On-4 concept was
prepared. After taking impression, fiber-reinforced resin, PEEK, zirconia and
metal substructures were manufactured with Cad/Cam. Photo elastic stress
analysis was performed.   On the other
hand 3D virtual models of the same substructures were formed with the .stl data
of the CAD. Then finite element stres analysis was applied at the same
circumstances.

Results: In the
photoelastic and finite element stres analysis, rigid substructures such as
metal and zirconia showed lower stres values than elastic materials such as
PEEK and fiber. As a facility of the finite element analysis internal stresses
of the substructures were evaluated. Lower stresses were observed in fiber and
PEEK infrastructures with low elastic modulus.

Conclusion: İncreased
modulus of elasticity of the infrastructure, reduced.stresses transmitted to
the implants When the internal stresses of the materials were evaluated, lower
stresses were seen in infrastructures such as fiber and PEEK with low elastic
modulus .Photoelastic and finite element stress analyzes gave similar stress
results to the implant and surrounding tissues. Therefore, the results
supported each other.

Keywords

All-On-Four, Dental Implant, Stress Analysis, Substructures

Project Number

18202053

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