Expansion Screws Write short note on expansion screw. Answer. An expansion screw is used for expansion of arch, e.g. in rapid maxillary expansion or in slow expansion or in patient of unilateral or bilateral crossbite. A typical expansion screw consists of a long body divided into two halves. Each half has a threaded inner side that receives one end of a double ended … [Read more...] about Expansion Screws
Orthodontics
Hybrid Hyrax Expanders Explained
Hybrid Hyrax Expanders Explained Write short note on hyrax screw. Answer. Full form of HYRAX is hygienic rapid expander. The tooth borne appliance use a special type of screw which is known as HYRAX. HYRAX screw is an expansion appliance. HYRAX screw consists of heavy gauge wire extension which is adapted in such a way that it follows the contour of palate. … [Read more...] about Hybrid Hyrax Expanders Explained
Undermining Resorption
Undermining Resorption Write a short note on undermining resorption. Answer. It is also known as indirect resorption or rearward resorption. It is named by Sandstedt. It occurs due to the application of extreme forces for the movement of the tooth. As there is the occurrence of hyalinization, chances of frontal resorption are diminished. After some days … [Read more...] about Undermining Resorption
Pressure Tension Theory
Pressure Tension Theory Write a short note on pressuretension theory. Answer. It is one of the theories of tooth movement Pressure-Tension theory was given by Schwarz in 1932. Although Sandstedt (1904) and Oppenheim (1911) investigated the phenomenon of tooth movement by histological examination of the supporting structure, Schwartz is credited with the … [Read more...] about Pressure Tension Theory
Mechanics Of Tooth Movement
Mechanics Of Tooth Movement What are the characteristic features of orthodontic force. Describe the deleterious effects of orthodontic force on root. Answer. Characteristic Features of Orthodontic Force Clinically Orthodontic force should produce rapid tooth movement. Orthodontic force should cause minimum patient discomfort. Orthodontic force should be such … [Read more...] about Mechanics Of Tooth Movement