What is the theory of tooth movement?
The classic theory of biology of tooth movement has three main pillars (1) osteoclastogenesis occurs due to compression stresses and osteoblast activity occurs due to tensile stresses, and therefore osteoclasts should populate compression sites and osteoblasts should populate tension sites; (2) the catabolic phase and …
What is Hyalinization in Ortho?
The appearance of necrotic tissue (also called hyalinization) is an important component in the process of tooth movement. Mainly based on histological research, a pressure and a. tension side are distinguished during orthodontic tooth. movement.
What is undermining resorption?
Undermining resorption results in delayed, large tooth movements because a great thickness of alveolar bone must be removed before the bone that lines the alveolar socket is resorbed. If force levels are maintained this process continues to repeat itself.
How does bone remodeling help in orthodontic tooth movement?
Bone remodeling is vital for orthodontic tooth movement. Significant compressive and tensional forces on the periodontium induce the signaling pathways mediated by various osteogenic genes including OPN, bone sialoprotein, Osterix, and osteocalcin.
What is reciprocal Anchorage?
Reciprocal – Type of anchorage when two units of teeth move towards each other with equal distance. Stationary – Type of anchorage where the teeth move in a translation manner, not tipping.
What is pressure tension theory?
Pressure-tension theory. The histological research by Sandstedt, 1904, Oppenheim, 1911, Schwarz, 1932, hypothesized that a tooth moves in the periodontal space by creating a pressure and tension side (Table 1). It explains the alteration of blood flow in periodontal ligament.
What is stromal Hyalinization?
Hyalinized stroma is a dense, eosinophilic material composed of collagen fibers. • Almost half of intraductal oncocytic papillary neoplasms have hyalinized stroma. • Only 1.2% of intraductal papillary mucinous neoplasms have hyalinized stroma.
What is frontal and undermining resorption?
undermining resorption. With frontal resorption, a steady attack on the outer surface of the lamina dura results in smooth continuous tooth movement. With undermining resorption, there is a delay until the bone adjacent to the tooth can be removed.
What is proximal stripping?
Proximal stripping is carried out using of metallic abrasive strip, safe sided carborundum disk, or with long thin tapered fissure burs with air rotor. The use of rotary cutting instrument can harm the pulp by exposure of mechanical vibration and heat generation (in some cases).
How is cementum important for orthodontic tooth movement?
Acellular cementum anchors PDL fiber bundles to the tooth; cellular cementum has an adaptive role. Bone, the PDL, and cementum together form a functional unit of special importance when orthodontic tooth movement is undertaken.
What is optimum orthodontic force?
The optimal orthodontic force can be interpreted as the force field that, when exerted on the tooth, causes the most areas of the PDL to be covered by both good stress and good strain.
What is orthodontic anchor?
Anchorage in orthodontics is defined as a way of resisting movement of a tooth or number of teeth by using different techniques. Anchorage is an important consideration in the field of orthodontics as this is a concept that is used frequently when correcting malocclusions.