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RT International
Russia destroys first Canadian APC – Defense Ministry
A state-of-the-art Canadian-made Senator armored vehicle has been destroyed by the Russian military in the Ukraine conflict
PubMed
Effects of ultrasonic instrumentation on enamel surfaces with various defects - PubMed
The results of this study suggest that ultrasonic scaling can cause further damage to teeth with enamel cracks, early caries and resin restorations...
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