First of all, your maxillary is part of your upper jaw and face. You have the maxillary sinuses that are generally the ones that get infected, along with the rest of the sinus system.
maxillary permanent molars have a distally inclined path of eruption initially as they erupt they become more horizontally positioned in such situation mesial migration of the erupting tooth is very...
A model aeroplane is used for presentations and testing. Model planes are also used for fun. They are used model-plane clubs, aeroplane company headquarters and studios. (Bedroom, in my house)
The only answer that comes to mind is "Airships". Hydrogen, the lightest element, was used in airships, where excess weight was undesirable. However, accidents like the Hindenburg disaster showed...