Necati KALELİ, Çağrı URAL, Ahmet Serkan KÜÇÜKEKENCİ

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

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.

Anahtar Kelimeler:

Lazer sinterleme, lazer tarama hızı, metal seramik bağlantı dayanımı

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

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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