NEET MDS Shorts
98790
OrthodonticsIntercanine width serves as safety valve for dominant horizontal basal mandibular growth spurt.
64260
OrthodonticsExplanation: The philtrum is the vertical groove located in the middle of the upper lip. It is primarily formed by the fusion of the medial nasal processes, which include the globular process. The globular process is a key structure in the embryonic development of the face, contributing to the formation of the upper lip and the philtrum.
92420
OrthodonticsContraindications for activator include high FMA angle, severe protruded maxilla, and severe crowding. It is indicated for growing patients.
63518
Orthodontics
ankylosed teeth are also known as submerged teeth.
submerged teeth are decidous teeth most commonly mandibular second molars
Most common permanant tooth found to be ankylosed is premolars.
43142
OrthodonticsThe position of the maxillary canines and first permanent molars relative to the mandibular canines and first permanent molars
91864
Orthodonticsmoderate force, in the range of 50 to 150 grams
61420
Orthodontics
SOLUTION The key to success is to use an appliance that is both comfortable, easily retained and predictable such as a simple Hawley retainer with recurve springs or a fixed labial-lingual appliance (including a vertical removable arch for ease of adjustment with a recurve spring to jump the cross-bite). Both of these appliances work by tipping the maxillary teeth forward so they are in a normal dental relationship to the mandibular teeth. Once this is accomplished, it will allow future coordinated growth between the maxilla and the mandible
28143
Orthodontics
The possibility that a distal step would become class II is very real, and this not self correcting problem. When the central incisors erupt, these teeth use up essentially all of the excess space in the normal primary dentition. With the eruption of the lateral incisors, space becomes tight in both arches. Continued development of the arches improves the spacing situation, and by the time the canine teeth erupt, space is once again adequate.
Normal child will go through a transitory stage of mandibular incisor crowding at age 8 to 9 even if there will eventually be enough room to accommodate all the permanent teeth in good alignment. In other words, a period when the mandibular incisors are slightly crowded is a normal developmental stage.
48975
OrthodonticsBeta titanium wire is most suitable for final tooth adjustments due to its low modulus of elasticity, allowing precise and gentle force application.
17504
Orthodontics
SOLUTION The following three patterns of tooth movement can be used to correct a Class II malocclusion: · A combination of retraction of the upper teeth and forward movement of the lower teeth, without tooth extractions · Retraction of maxillary incisors into a premolar extraction space · Distal movement of maxillary molars and eventually the entire upper dental arch