Journals / Ege Üniversitesi Diş Hekimliği Fakültesi / 2019 / Cilt: 40 - Sayı: 3

The ceramic fracture evaluation of metal-ceramic restorations fabricated by casting and laser sintering: a prospective clinical study

Lazer sinterleme ve döküm metal-seramik restorasyonların seramik kırıklarının değerlendirmesi: prospektif klinik çalışma

Pages
153–161
Publication Date
2022-10-11
DOI
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The ceramicfractures in men (5.8%) were significantly higher than women (1.4%). (P=.004)Conclusions: Within the limitations of the current study it was concluded that the ceramic fractures in metal-ceramic fixed partialdentures fabricated by DMLS and conventional casting methods showed statistically no significant differences.

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Objective & Hypothesis:Purpose: The aim of this clinical study was to evaluate and compare ceramic fracture of Co-Cr metal-ceramic restorations fabricatedby (Direct Metal Laser Sintering) DMLS or conventional cast methods.Methods: 86 patients with a need of fixed partial dentures without any sign of bruxial behaviors or symptoms were randomly dividedinto 2 groups.
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Key Findings & Data:Patient follow up was done 1 year aftercementation.
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Conclusion & Impact:The ceramicfractures in men (5.8%) were significantly higher than women (1.4%). (P=.004)Conclusions: Within the limitations of the current study it was concluded that the ceramic fractures in metal-ceramic fixed partialdentures fabricated by DMLS and conventional casting methods showed statistically no significant differences.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Purpose: The aim of this clinical study was to evaluate and compare ceramic fracture of Co-Cr metal-ceramic restorations fabricatedby (Direct Metal Laser Sintering) DMLS or conventional cast methods.Methods: 86 patients with a need of fixed partial dentures without any sign of bruxial behaviors or symptoms were randomly dividedinto 2 groups. In the first group metal substructures were fabricated by laser sintering using Co-Cr alloy powder. In the secondgroup substructures were fabricated by lost-wax casting technique using Co-Cr alloy ingots. Patient follow up was done 1 year aftercementation. Ceramic fractures were evaluated and classified. Student T-test, Mann Whitney U, Ki Square and Fisher tests were usedin statistical analysis (α=.05).Results: The success rate was 96.2% for DMLS group and 97.4% for cast group. There was statistically no significant differencebetween DMLS group (3.8%) and cast group (2.6%) in terms of ceramic fractures and fracture degrees (P=.447). The ceramicfractures in men (5.8%) were significantly higher than women (1.4%). (P=.004)Conclusions: Within the limitations of the current study it was concluded that the ceramic fractures in metal-ceramic fixed partialdentures fabricated by DMLS and conventional casting methods showed statistically no significant differences.

Özet

Amaç: Bu çalışmanın amacı direkt metal lazer sinterleme ve döküm yöntemleri ile hazırlanan Co-Cr altyapılı metal-seramik restorasyonlarda oluşan porselen kırıklarının klinik olarak değerlendirilmesi ve karşılaştırılmasıdır. Gereç ve Yöntem: Sabit protetik restorasyon ihtiyacı olan, bruksiyel davranış ve semptom göstermeyen 86 hasta 2 gruba ayrılmıştır. Birinci grubun metal-seramik restorasyonlarının altyapıları Co-Cr toz alaşımının lazer ile sinterlenmesiyle, ikinci grubun metal-seramik restorasyonlarının altyapıları ise Co-Cr alaşımının mum atım yöntemiyle dökülmesi ile elde edilmiştir. Hastalara metal-seramik restorasyonlarının simantasyonundan itibaren 1 yıl sonraya kontrol randevusu verilmiştir. Kontrol randevusunda restorasyonlarda oluşan porselen kırıkları değerlendirilmiş ve sınıflandırılmıştır. Sonuçların istatistiksel analizinde Student T, Mann Whitney U, Ki Kare ve Fisher test istatistiği kullanılmıştır. (α=0.05). Bulgular:DMLS grubunda başarı oranı %96,2, döküm grubunda %97,4 bulunmuştur. Porselen kırığı görülme açısından DMLS gurubu (3.8%) ve döküm grubu (2.6%) arasında istatistiksel olarak anlamlı fark bulunmamıştır (P=.447). Erkek hastalarda görülen porselen kırığı (5.8%) kadın hastalarda görülen porselen kırığından (1.4%) anlamlı olarak daha fazla bulunmuştur. (P=.004) Sonuç: Çalışmanın sınırları dâhilinde metal-seramik sabit protezlerde porselen kırığı komplikasyonu görülme açısından, altyapının DMLS yöntemi veya döküm yöntemi ile yapılması arasında bir fark olmadığı görülmüştür.

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Cite This Article

ÇALIŞKAN, I., UÇAR, Y., EKREN, O. (2022). The ceramic fracture evaluation of metal-ceramic restorations fabricated by casting and laser sintering: a prospective clinical study. Ege Üniversitesi Diş Hekimliği Fakültesi, Cilt: 40 - Sayı: 3, 153–161. https://ajindex.com/articles/496280

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