Objectives: To test the wear of enamel against Yttria Tetragonal Zirconia Polycrystals (Y-TZP) in comparison to the wear of enamel against a noble white high Palladium alloy. Methods: A total of 20 specimens were used, 10 of Y-TZP and 10 of High Palladium alloy, both were subjected to 202,800 contacts against an enamel rod 2x2 mm in cross section under a mean load of 475.04g leading to a mean f...

The aim of this study was to assess the effect of toothbrushing with toothpastes having different relative dentine abrasivity (RDA) and toothbrushes having different bristles hardness on different composite resins, compomers and traditional glassionomer cements by surface roughness evaluation. All the samples were evaluated regarding the surface roughness using roughness checker (Taylor Hobson-...

The Martian moon Phobos is the target of upcoming JAXA Moons eXploration (MMX) mission. There are currently no known samples Phobos, so spacecraft hardware testing and scientific studies require regolith simulants. Here, we present two new simulants: Captured Asteroid-1 (PCA-1) Giant Impact (PGI-1). These simulants reflect hypotheses for Phobos’s formation, thus broad possibilities composition....

Knee and hip joint replacement implants involve a sliding contact between the femoral component and the tibial or acetabular component immersed in body fluids, thus making the metallic parts susceptible to tribocorrosion. Micro-motions occur at points of fixation leading to debris and ion release by fretting corrosion. β-Titanium alloys are potential biomaterials for joint prostheses due to the...

The "capteur individuel de poussiere" CIP 10 personal dust sampler--developed by the Centre d'Etudes et Recherches de Charbonnages de France (CERCHAR) research organization--is a small, quiet, lightweight unit which samples at a flow rate of 10 L/min. It is a three-stage sampler, using two stages to remove nonrespirable dust particles and one stage to collect the respirable fraction. Airflow th...

Türkiye’de doğal taş sektörü son yıllarda önemli derecede gelişmiş ve işletmelerin büyük yatırımlar ile modern üretim yöntemlerine tekniklerine yöneldiği görülmektedir. Fabrika ocaklarda kullanılan bakıldığında özellikle elmas boncuklu tel kesme, zincirli kollu dairesel testereli blok kesme (S/T) katrak makinelerinin ön plana çıktığı Yüksek verimlilik, kar oranlarına sahip bu makineler firmalar...