Talk to us?

NEETMDS- courses, NBDE, ADC, NDEB, ORE, SDLE-Eduinfy.com

NEET MDS Shorts

88098
Orthodontics

Vestibular appliances are designed to influence the vestibular musculature and include oral screen, lip bumper, and Frankel appliance. The activator is an intraoral functional appliance, not vestibular.

92420
Orthodontics

Contraindications for activator include high FMA angle, severe protruded maxilla, and severe crowding. It is indicated for growing patients.

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

 

51862
Orthodontics

Passive 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.

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: 
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 

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 
2) Initiates maximum cellular response 
3) Produces direct or frontal resorption

14955
Orthodontics

If the coil and tag of a palatal canine retractor are placed too far distally, the force applied will tend to move the tooth buccally (toward the cheek) rather than palatally (toward the palate), which can hinder the intended movement.

91864
Orthodontics

moderate force, in the range of 50 to 150 grams

74776
Orthodontics

SOLUTION
Simon used the orbital plane (a plane perpendicular to the F-H plane at the margin of the bony orbit directly under the pupil of the eye).

According to Simon, in normal arch relationship, the orbital plane passes through the distal axial aspect of the maxillary canine

Malocclusions described as anteropostenor deviations based on their distance from the orbital plane are as follows:

1. Protraction: The teeth, one or both, dental arches, andYor jaws are too far forward, i.e. placed forward or anterior to the plane as compared to the normal where the plane passes through the distal incline of the canine.

2. Retraction: The teeth, one or both dental arches and/or jaws are too far backward, i.e. placed posterior to the plane than normal

56892
Orthodontics

Expansion and distalization are considered noninvasive methods for gaining space in orthodontic treatment.

48975
Orthodontics

Beta titanium wire is most suitable for final tooth adjustments due to its low modulus of elasticity, allowing precise and gentle force application.

Quick Key Notes