If a tooth with a gold crown breaks, it is generally because the underlying tooth structure has fractured or decayed. Gold crowns are not immune to becoming loose, especially if you are eating foods and candy that are harmful to crowns and bridges. Gold crowns also cause the least wear on the opposing tooth.
Making the world better, one answer at a time. An artificial boundary is a boundary made by humans, examples include dams, the fence at the border between the U.S and Mexico. A natural boundary is a boundary made by nature, a boundary that happens naturally, examples include rivers, mountains and such.
One such change is the introduction of permitted boundary activities. A permitted boundary activity is one that: would normally require a resource consent because it triggers a district rule relating to the distance of a structure from the boundary or the dimensions of a structure in relation to its distance from the boundary; relates to a boundary that is not a public boundary, such as a road, river, lake, coastline or reserve;