It also seems to have antimicrobial properties and helps prevent teeth from experiencing recurrent decay prior to the placement of a permanent restoration. Other types of 'medicated' fillings that dentists use are Glass ionomer based, since they tend to release fluoride over time.
Alta California became a part of Mexico in 1821 following its successful war for independence, but was ceded to the United States in 1848 after the MexicanâAmerican War. The western portion of Alta California was organized as the State of California, which was admitted as the 31st state on September 9, 1850. The California Gold Rush starting in 1848 led to dramatic social and demographic change, with large-scale immigration from the east and abroad with an accompanying economic boom.
In 1846, the border between U.S. and British territory was formally established at the 49th parallel â the part of the territory that was given to Britain would ultimately become part of Canada. Oregon was officially admitted to the union as a state on February 14th, 1859.859 1  -. February 14 - Oregon becomes the first state admitted to the Union with an exclusion law written into the state constitution. 2  Propositions of Congress accepted by the State 3 June 1859.  3 Oregon Democrat newspaper begins printing.