Lazer Tarama Hızının Lazer Sinterleme ile Üretilen Metal Altyapıların Porselen Bağlantısı Üzerindeki Etkisi

Year 2020, , 227 - 232, 02.10.2020

Necati Kaleli , Çağrı Ural , Ahmet Serkan Küçükekenci

https://doi.org/10.30934/kusbed.636713

Cited By: 2

Abstract

Amaç: Bu çalışmanın amacı; farklı tarama hızlarında lazer sinterleme ile üretilen kobalt-krom (Co-Cr) metal altyapıların porselen bağlantılarının değerlendirilmesidir.
Yöntem: Uluslararası Standartlar Teşkilatı (ISO) 9693-1 standardında belirtilen ölçütler doğrultusunda 3 farklı Co-Cr metal altyapı grubu (n=10) üretilmiştir. Grup C, geleneksel döküm yöntemi ile; grup LS3, 3 m/sn tarama hızında DMLE yöntemi ile; grup LS6, 6m/sn tarama hızında DMLE yöntemi ile üretilmiştir. Her gruptan birer metal altyapı yüzey morfolojilerinin değerlendirilmesi amacıyla taramalı elektron mikroskobu (SEM) altında incelenmiştir. SEM analizi sonrasında ISO 9693-1 doğrultusunda tüm örneklerin porselen fırınlamaları gerçekleştirilmiştir. Fırınlamalar tamamlandıktan sonra tüm öneklere 3 nokta bükme testi uygulanmıştır. Elde edilen veriler istatistiksel olarak 0,05 anlamlılık düzeyinde değerlendirilmiştir.
Bulgular: En düşük porselen bağlantı dayanımı değerleri grup LS6’dan elde edilmesine rağmen bu farklılık istatistiksel olarak anlamlı bulunmadı (p>0,05).
Sonuç: Lazer tarama hızının lazer sinterleme ile üretilen metal altyapıların porselen bağlantı dayanımını etkilemediği görüldü.

Keywords

Lazer sinterleme, lazer tarama hızı, metal seramik bağlantı dayanımı

Effect of Laser Scan Speed on the Porcelain Bond Strength of Laser-Sintered Metal Frameworks

Abstract

Objective: The aim of this in vitro study was to evaluate the porcelain bond strength of laser-sintered cobalt–chromium (Co-Cr) metal frameworks sintered at different laser scanning speeds.
Methods: Three different Co-Cr metal framework groups (n=10) were fabricated in accordance with the criteria specified in the International Organization for Standardization (ISO) 9693-1: group C, fabricated by conventional casting technique; group LS3, fabricated by DMLM at laser scan speed of 3 m/s; group LS6, fabricated by DMLM at laser scan speed of 6 m/s. One metal framework from each group was examined under scanning electron microscopy (SEM) to evaluate surface morphology. Thereafter, porcelain firings were conducted according to ISO 9693-1. Next, all specimens were subjected to 3-point bending test. The obtained data were statistically evaluated at 0.05 significance level.
Results: The lowest porcelain bond strength values were obtained from group LS6; however, this was not found statistically different (p>0.05).
Conclusion: It was revealed that laser scanning speed has no effect on porcelain bond strength in laser-sintered metal frameworks.

Keywords

Laser sintering, laser scan speed, metal ceramic bond strength

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