NEET MDS Shorts
33185
INI CET
In orthodontic planning for upper incisor retraction, it is generally calculated that for every 1 mm of retraction, 2 mm of space is required in the arch (1 mm for each side or considering the perimeter change).
78178
RadiologyThe best radiographic view for TMJ is OPG.
56501
NEETMDSThe orbicularis oris muscle is a sphincter muscle that encircles the mouth and is responsible for closing the lips, pouting, and whistling. Paralysis of this muscle, typically due to facial nerve injury, would result in the inability to close the lips completely.
22697
Oral Pathology
Reversible pulpitis changes to irreversible pulpitis primarily because of
invasion of microorganisms.
Reversible pulpitis is a condition where the pulp is inflamed but can
potentially heal if the causative agent is removed and the pulp remains vital.
Irreversible pulpitis, however, occurs when the inflammation is severe or
chronic, leading to irreversible damage to the pulp. The primary reason for this
progression is typically the invasion of microorganisms and their byproducts,
which can cause further inflammation and necrosis of pulpal tissue, making
healing unlikely.
34834
Dental Materials
A dental sealer is used to fill the microscopic spaces between the restorative material and the tooth structure, primarily to prevent microleakage.
54637
PedodonticsThe most important modification of amalgam restorations on primary teeth is cavity preparation (Answer: 2). Unlike permanent teeth, primary teeth have a thinner enamel layer and a larger pulp chamber relative to their size. Therefore, the cavity preparation must be done with caution to avoid pulp exposure and ensure the longevity of the restoration.
38056
EndodonticsFinally, if the tip of the gutta-percha condensation instrument breaks in the apical third of the root canal, the most common practice is to simply continue with the obturation up to the point of obstruction. Attempting to dissolve the gutta-percha or performing surgery to retrieve the broken piece may not be necessary and can potentially cause further damage. Instead, the area is sealed, and the body's natural healing processes are allowed to occur.
70460
Conservative Dentistry
The modulus of elasticity (Young's Modulus) is a measure of a material's inherent stiffness and is an intrinsic property related to the interatomic forces and bonding within the material's crystal structure.
84261
PedodonticsA chisel is used with a "push" motion.
13011
Oral Surgery
Gelfoam is an absorbable gelatin sponge used as a local hemostatic agent in surgery and dentistry.
It provides a matrix for clot formation and is gradually resorbed by the body.
The typical absorption time is 4–6 weeks, depending on the site of placement and local tissue conditions.