NEET MDS Shorts
14634
Orthodontics
The ugly duckling stage refers to the transient malocclusion seen during the eruption of maxillary canines, where the upper central incisors show spacing and flaring. It typically occurs when the maxillary canines erupt, exerting pressure on the roots of the lateral incisors, which in turn causes the crowns of the central incisors to flare apart. This stage is self-correcting once the canines fully erupt and the incisors return to normal alignment.
92420
OrthodonticsContraindications for activator include high FMA angle, severe protruded maxilla, and severe crowding. It is indicated for growing patients.
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.
51862
OrthodonticsPassive tooth-borne functional appliances are removable and do not require active muscle participation, such as Andersen activator, Woodside and Hawley activator, and expansion activator. The Herbst appliance is a fixed functional appliance.
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.
73331
OrthodonticsThe labial bow in an activator is constructed with 0.8 mm wire, slightly heavier to provide stability and retention.
84083
OrthodonticsThe transitional phase of dentition refers to the period when the primary (deciduous) teeth are being replaced by permanent teeth. This phase is characterized by the simultaneous eruption of permanent teeth and the exfoliation (loss) of primary teeth. It typically occurs between the ages of 6 and 12 years. The other options do not accurately describe this transitional phase; option 2 refers to a post-transitional phase, while option 3 pertains to orthodontic treatment rather than a specific phase of dentition.
72603
Orthodontics
Angle Classification: Class III Malocclusion: Clinical Implications:Angle Class III Malocclusion:
36963
Orthodontics
SOLUTION Optimum orthodontic force is one, which moves teeth most rapidly in the desired direction, with the least possible damage to tissue and with minimum patient discomfort. Oppenheim and Schwarz following extensive studies stated that the optimum force is equivalent to the capillary pulse pressure, which is 20-26 gm/sq. cm of root surface area. From a clinical point of view, optimum orthodontic force has the following characteristics: From a histologic point of view the use of optimum orthodontic force has the following characteristics: 1) The vitality of the tooth and supporting periodontal ligament is maintained
1) Products rapid tooth movement
2) Minimal patient discomfort
3) The lag phase of tooth movement is minimal
4) No marked mobility of the teeth being moved
2) Initiates maximum cellular response
3) Produces direct or frontal resorption
30779
Orthodontics
Terms used to describe the position of teeth. Mesioversion - A tooth in the arch located more mesial than normal
Distoversion - A tooth in the arch located more distal than normal
Labioversion - An incisor or canine outside of arch towards the lips
Buccoversion - A posterior tooth outside the arch toward the cheek
Linguoversion - A tooth inside the arch form toward the tongue
Infraversion - A tooth that has not erupted to the occlusal plane
Supraversion - A tooth the has over-erupted
Torsiversion - A tooth rotated on its axis
Transversion (Transposition) - Teeth that are in the wrong sequential order.