NEET MDS Shorts
74986
INI CET
Brittleness is the property of a material that describes its tendency to fracture with little or no plastic deformation when subjected to stress. Toughness is the ability to absorb energy and plastically deform without fracturing, while hardness is the resistance to indentation or scratching.
39578
Public Health Dentistry
A test of significance is used to determine whether the observed
difference between two means is statistically significant, meaning it is
unlikely to have occurred by random chance.
84722
ProsthodonticsAs lower denture settles down due to ridge resorption, the effect is a prominent chin.
60341
INI CET
The modulus of elasticity of PMMA is approximately 2.4GPa. The hardness is approximately 70KHN. PMMA remains chemically stable up to a temperature of 260 degreeF. The typical tensile strength of PMMA is around 50-70 MPa. Therefore, 20 MPa is the incorrect statement.
14178
EndodonticsLoss of Coronal Structure: During endodontic treatment, the coronal portion of the tooth may be significantly altered or reduced, especially if there is extensive decay or if a crown is required after treatment. The loss of tooth structure compromises the tooth's ability to withstand occlusal forces.
42501
Physiology
The physiological capacity of the bladder is the maximum intravesical volume tolerated without undue discomfort. It is usually between 250 and 450 ml. The bladder can stretch to hold more urine, but this is considered beyond the normal physiological capacity and can cause discomfort.
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.
63669
Periodontics
18322
Oral medicineEmergency measures for caustic ingestion include endoscopic assessment of degree of damage. Gastric lavage is contraindicated as it may cause further injury. Early endoscopy helps assess severity, guide treatment, and determine prognosis. Other options mentioned are consequences, not treatments.
30817
Dental Materials
one ot the main adanhtges of GIC as a restoratie material was its ability to form chemical bonds with the tooth structure. Bonding in GIC primarily invokes chelation of carboxyl groups of the polyacids sith the calcium in the apatite of enamel and dentin. Bond rength of enamel is always greater than that of dentin due to higher mineral content. The bonding is improved by the removal of the debris layer called smear layer’ by a process called conditioning.