NEET MDS Shorts
73331
OrthodonticsThe labial bow in an activator is constructed with 0.8 mm wire, slightly heavier to provide stability and retention.
56892
OrthodonticsExpansion and distalization are considered noninvasive methods for gaining space in orthodontic treatment.
76957
OrthodonticsOrthodontic wires are often made from stainless steel, which contains iron, carbon, and other alloying elements. The term "iron carbide" refers to a compound of iron and carbon, typically represented as Fe₃C. In the context of orthodontic wires, the microstructure can exist in different phases depending on the temperature and composition. Austenite is a face-centered cubic (FCC) structure that is stable at high temperatures and is known for its ductility and strength. When orthodontic wires are heated during the manufacturing process, they can be formed into austenite, which can then be transformed into martensite upon cooling, providing the wire with desirable properties for orthodontic applications.
43142
OrthodonticsThe position of the maxillary canines and first permanent molars relative to the mandibular canines and first permanent molars
15578
Orthodontics
SOLUTION Altered respiratory pattern, such as breathing through the mouth rather than the nose, could change the posture of the If these postural changes were maintained, face height would increase, and posterior teeth would super-erupt;
head, jaw, and tongue. This in turn could alter the equilibrium of pressures on the jaws and teeth and affect both jaw growth and tooth position.
In order to breathe through the mouth, it is necessary to lower the mandible and tongue, and extend (tip back) the head.
unless there was unusual vertical growth of the ramus, the mandible would rotate down and back, opening the bite
anteriorly and increasing overjet; and increased pressure from the stretched cheeks might cause a narrower maxillary dental arch.
59209
OrthodonticsEarnest Klein's classification of habits distinguishes between intentional habits (those that are consciously performed) and non-intentional habits (those that occur unconsciously or without deliberate intention). This classification helps in understanding the nature of habits, particularly in the context of dental and orthodontic practices.
52183
Orthodontics
SOLUTION Angle of Convexity The angle of convexity is formed by the intersection of line from N to point A, to point A to pogonion.
22317
Orthodontics
SOLUTION Baseplate: The hard plastic part of some retainers that covers the gum and has the wire components of the retainers attached to it.
64922
Orthodontics
PDL traction is mainly due to supracrestal fibres, transeptal fibres of gingival fibers. It needs at least 232 days for readaptation, e.g. rotations. To avoid relapse either circumferential supracrestal fibrotomy is done OR a prolonged retention is given.
15034
OrthodonticsThe lymphoid system, which includes lymph nodes, spleen, and other lymphatic tissues, undergoes significant growth during childhood. By the age of 9-10 years, the lymphoid tissue can reach approximately 200% of its adult size due to the increased demand for immune function during this period. This growth is part of the body's preparation for increased exposure to pathogens as children interact more with their environment.