NEET MDS Shorts
29493
OrthodonticsIndicators for Class II activator include mandibular retrusion, horizontal/anterior mandibular growth, and upright lower anteriors. Crowding in lower anteriors is not a specific indicator for its use.
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.
36770
OrthodonticsA cleft palate is a congenital condition that does not inherently affect statural growth. The other factors listed—poor nutrition, chronic diseases, and cardiac diseases—can all have long-term negative impacts on a person's growth and development. Poor nutrition can lead to stunted growth due to insufficient nutrients for bone and tissue development, while chronic diseases and cardiac diseases can impair the body's ability to regulate growth hormones and overall health, potentially leading to growth delays or abnormalities.
84145
OrthodonticsFor an 8-year-old patient with skeletal anterior open bite, treatment involves Frankel appliance combined with high-pull headgear to control vertical growth and promote proper jaw development.
72603
Orthodontics
Angle Classification: Class III Malocclusion: Clinical Implications:Angle Class III Malocclusion:
87824
Orthodontics
The growth of the mandible generally follows the "general" body growth curve,
which is distinct from the neural and lymphoid tissue growth curves described by
Scammon's growth curves.
Lymphoid tissue grows very rapidly in childhood, reaching a peak larger than
adult size before puberty, then shrinking.
Neural tissue grows rapidly early in life and reaches nearly adult size by about
6-7 years of age.
General tissues (including bone, muscle, and viscera) exhibit an S-shaped curve
with rapid growth in infancy, a slower phase in childhood, and a pubertal growth
spurt. The mandible's growth pattern most closely mirrors this general curve.
97626
Orthodontics
SOLUTION If heavy pressure is applied to a tooth, pain develops almost immediately as the PDL is literally crushed. If appropriate orthodontic force is applied, the patient feels little or nothing immediately. Several hours later, however, pain usually appears. The patient feels a mild aching sensation, and the teeth are quite sensitive to pressure, so that biting a hard object hurts. The pain typically lasts for 2 to 4 days, and then disappears until the orthodontic appliance is reactivated. At that point, a similar cycle may recur, but for almost all patients, the pain associated with the initial activation of the appliance is the most severe.
There is no excuse for using force levels for orthodontic tooth movement that produce immediate pain of this type.
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.
66940
Orthodontics
Etiology of Tongue thrust Genetic factors : They are specific anatomic or neuromuscular variations in the oro-facial region that can precipitate tongue thrust. e.g. Hypertonic orbicularies oris activity. Learned behaviour (habit) : Tongue thrust can be acquired as a habit. The following are some of the predisposing factors that can lead to tongue thrusting: Sometimes the maturation is delayed and thus infantile swallow persists for a longer duration of time. Mechanical restrictions : The presence of certain conditions such as macroglossia, constricted dental arches and enlarged adenoids predispose to tongue thrust habit. Neurological disturbance: Neurological disturbances affecting the oro-facial region such as hyposensitive palate and moderate motor disability can cause tongue thrust habit. Psychogenic factors : Tongue thrust can sometimes occur as a result of forced discontinuation of other habits like thumb sucking. It is often seen that children who are forced to leave thumb sucking habit often take up tongue thrusting.
Fletcher has proposed the following factors as being the cause for tongue thrusting.
a. Improper bottle feeding
b. Prolonged thumb sucking
c. Prolonged tonsillar and upper respiratory tract infections
d. Prolonged duration of tenderness of gum or teeth can result in a change in swallowing pattern to avoid pressure on the tender zone.
Maturational : Tongue thrust can present as part of a normal childhood behaviour that is gradually modified as the age advances. The infantile swallow changes to a mature swallow once the posterior deciduous teeth start erupting.
20905
Orthodonticsfor facial growth order of growth is width > depth > height