Cantillon was a major influence on physiocrat Francois FranÃ§ois, quesnay who may have learned Of'cantillon s work Through marquis Of. Mirabeau while it is evident That essai Influenced, quesnay to what degree remains. controversialantillon made frequent use of the concept of ceteris paribus throughout Essai in an attempt to neutralise independent variables. Furthermore, he is credited with employing a methodology similar to Carl Menger 's methodological individualism, by deducing complex phenomena from simple observations.
Intrinsic stains that are caused by damage to a nerve or blood vessel in a tooth sometimes can be prevented. You may need to have root canal treatment to remove the inner part of the tooth (the pulp) before it has a chance to decay and darken. However, teeth that have root canal treatment may darken anyway.
Causes of Intrinsic Staining. Intrinsic staining can occur either before the teeth have emerged, while they are still developing, or after they have emerged. Pre-eruptive staining, which occurs while the teeth are developing, is most often caused by medications or by fluoride. The most common causes of pre-eruptive intrinsic staining are excess fluoride intake either by the mother during pregnancy or by the child while the permanent teeth are developing. Tetracycline, an antibiotic, is also a common cause of this type of discoloration. Post-eruptive staining occurs after the teeth have emerged. The most common causes of this kind of intrinsic staining are trauma and extrinsic staining that reaches the inner layers of the teeth through cracks or surface damage. Trauma can create intrinsic discoloration when blood from a damaged pulp fills the small tubes inside the tooth.