NEET MDS Shorts
305080
AnatomyThe trigeminal ganglion lies on Anterior surface of petrous temporal bone near its apex in Meckel’s cave which is a space of dura mater
179461
Oral SurgeryMinor oral surgery should be performed one day after dialysis in a patient who
is on periodic renal dialysis. This is because the patient's platelet count and
coagulation factors are usually at their lowest before dialysis, which could
increase the risk of bleeding.
389692
Dental MaterialsOrmocers offer several advantages over conventional composites. They have excellent biocompatibility, minimal shrinkage, and their chemical structure allows for high resistance to masticatory forces. Additionally, they are aesthetically pleasing and can be polished to resemble natural teeth.
825927
Oral and Maxillofacial SurgeryClass B impaction in Pell and Gregory's classification means that
the cusp tip of the impacted tooth is located between the occlusal plane of the
second molar and the cervical line of the second molar. This is a common
position for mandibular third molars.
842910
PhysiologyMean Circulating Filling Pressure (MCFP) is a concept used in cardiovascular physiology to describe the average pressure in the large veins and the right atrium when the heart is not actively pumping (i.e., during diastole or when the heart is stopped). It reflects the pressure that fills the heart and is influenced by the volume of blood in the circulatory system and the compliance of the vascular system.
994448
ProsthodonticsThe most reproducible relation of the jaws that is used in fixed denture
construction is Centric Relation (CR). Here's a detailed explanation of the
options provided and why Centric Relation is the correct answer:
1) Centric Occlusion (CO): This is the position of the mandible where the
incisor and posterior teeth of the maxilla and mandible are in maximum
intercuspation, meaning the teeth are in their most closed and stable contact.
It is the position that occurs when the condyles are in the most superior and
anterior position in the glenoid fossae of the temporal bones. While important
for the function of the teeth, centric occlusion is not always a reliable
reference for the construction of a fixed denture, as it can be influenced by
various factors such as tooth wear, pathology, or parafunctional habits.
Moreover, it is a dynamic relationship that can change over time.
2) Centric Relation (CR): Centric relation is the most retruded, unstrained
position of the mandible on the maxilla from which the mandible can move to the
lateral and protrusive positions. It is the basis for the articulators in
dentistry and is considered the most reproducible jaw relationship for the
fabrication of fixed dentures. CR is determined by the temporomandibular joint
(TMJ) and does not involve tooth contact. This is crucial because it provides a
consistent and predictable starting point for constructing a denture that will
function harmoniously with the TMJ and the surrounding soft tissues. It is the
position where the condyles are in a centric relation with the fossa and the
disk is properly situated, which minimizes strain and maximizes stability during
function.
3) Protrusive Contact Position: This is the position of the mandible where the
incisor or canine teeth make contact with the maxilla in a forward and downward
movement. While it is a functional movement of the jaw, it is not a stable or
reproducible position for the construction of fixed dentures because it is
highly dependent on the muscles and may not be consistent across different
individuals or even during different occasions for the same individual.
4) Lateral Contact Position: This refers to the position of the mandible during
lateral movements, where the teeth contact the maxilla on the side of the arch.
Similar to protrusive contact, it is a functional position that is influenced by
muscle activity and not a stable reference for denture construction. Lateral
movements are also not the primary focus in fixed denture construction, which is
mainly concerned with the vertical and anteroposterior relationships of the
jaws.
551954
Oral MedicineGlimepiride is a sulfonylurea medication that stimulates insulin secretion from pancreatic beta cells by closing ATP-sensitive potassium channels and causing depolarization, leading to calcium influx and insulin release.
822058
Oral SurgeryThe closed mouth approach of mandibular nerve block relies on the anatomical
landmarks of the occlusal plane of occluding teeth and the anterior border of
the ramus. The mucogingival junction is not a relevant landmark for this
technique.