Biomechanical Evaluation of PEEK Material on Three-Unit Tooth-Implant-Supported Fixed Partial Dentures: A Finite Element Analysis

Öz

Purpose:Polyether ether ketone (PEEK), a recently introduced material claiming to absorb stress, has been assessed in limited studies for use in tooth-implant-supported fixed partial dentures (FPDs). This study aims to evaluate the effect of prosthetic material on stress accumulation in the teeth, periodontal tissues, and implants in tooth-implant-supported FPDs using finite element analysis (FEA). Materials -Methods: Assuming that the lower right first and second molars are missing, and using computed tomography (CT), a 3D scanner, and different software, a finite element model of a three-unit dental implant-supported FPD in which the implant is placed was created. Five experimental groups (metal supported ceramic, zirconia-based ceramic, monolithic zirconia, composite coated PEEK and monolithic PEEK) were formed. The prepared models were analyzed by applying a force of 600 N to the food piece, which was modeled as a negative copy of the pontic occlusal surface, and the maximum von Mises stress values were recorded. Results: Significant differences were observed in von Mises stress values depending on the prosthetic material. Group P (the prosthetic material with the lowest elastic modulus; PEEK) showed the highest stress values in cortical bone (108.94 MPa) and implant (722.59 MPa). Stress accumulation in dentin was highest in Group PC (107.05 MPa) and lowest in Group Z (41.89 MPa). Conclusion: Monolithic zirconia exhibited the lowest stress values in the bone tissue, implant, and tooth. Stress was concentrated around the cortical bone and the implant in PEEK materials having a low elastic modulus. Prosthetic materials can significantly affect stress values.

Anahtar Kelimeler

• Biomechanic
• Finite element analysis
• PEEK
• Polietereterketon
• Tooth-implant supported fixed partial dentures
• Stress

Etik Beyan

2023/02-05 firat University

PEEK Materyalinin Üç Üyeli Diş-İmplant Destekli Sabit Bölümlü Protezlerde Biyomekanik Değerlendirilmesi: Sonlu Elemanlar Analizi

Öz

Amaç:Stresi absorbe ettiği iddiasıyla son yıllarda kullanıma giren polietereterketon (PEEK) materyali, diş-implant destekli sabit bölümlü protezlerde (SBP) sınırlı sayıda çalışmada değerlendirilmiştir. Bu çalışmanın amacı, diş-implant destekli sabit bölümlü protezlerde kullanılan protetik materyalin diş, periodontal dokular ve implant üzerindeki stres birikimine etkisini sonlu elemanlar analizi (SEA) kullanarak değerlendirmektir. Gereç ve Yöntem: Alt sağ birinci ve ikinci molar dişlerin eksik olduğu varsayılarak; bilgisayarlı tomografi (BT), üç boyutlu tarayıcı ve çeşitli yazılımlar kullanılarak implant yerleştirilmiş üç üyeli diş-implant destekli sabit bölümlü protezin sonlu eleman modeli oluşturuldu. Beş deney grubu oluşturuldu:Metal destekli seramik, Zirkonya altyapılı seramik, Monolitik zirkonya, Kompozit kaplamalı PEEK, Monolitik PEEK. Hazırlanan modellerde, pontiğin oklüzal yüzeyinin negatif kopyası olarak modellenen besin parçasına 600 N kuvvet uygulandı ve maksimum von Mises stres değerleri kaydedildi. Bulgular:Protetik materyale bağlı olarak von Mises stres değerlerinde anlamlı farklılıklar gözlendi. Elastik modülü en düşük materyal olan PEEK'in kullanıldığı Grup P, kortikal kemikte (108,94 MPa) ve implantta (722,59 MPa) en yüksek stres değerlerini gösterdi. Dentindeki stres birikimi Grup PC’de en yüksek (107,05 MPa), Grup Z’de ise en düşük (41,89 MPa) olarak bulundu. Sonuç: Monolitik zirkonya, kemik dokusu, implant ve dişte en düşük stres değerlerini göstermiştir. Düşük elastik modüle sahip PEEK materyallerinde stres, özellikle kortikal kemik ve implant çevresinde yoğunlaşmıştır. Protetik materyal seçimi, oluşan stres değerlerini önemli ölçüde etkileyebilmektedir.

Anahtar Kelimeler

• Biyomekanik
• Sonlu Elemanlar Analizi
• PEEK
• Polietereterketon
• Stres
• Diş-implant destekli sabit bölümlü protezler.

Etik Beyan

Fırat üniversitesi 2023/02-05 numaralı etik kurul onayı alınmıştır.

Kaynakça

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