MDS PREP
Reversible pulpitis change to irreversible pulpits primarily because of
1) Vascular strangulation
2) Reduced host resistance
3) Invasion of microorganisms
4) An increase in microbial virulence
Oral Pathology
Answer: 3
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.
What is the role of vitamin D in calcium metabolism?
1) Increases renal excretion of calcium
2) Decreases absorption of dietary calcium
3) Activates absorption of dietary calcium
4) Inhibits bone resorption
Vitamin D plays a crucial role in calcium metabolism by activating the absorption of dietary calcium in the intestines.
A patient requires tooth extraction from an area that has been subjected to radiation therapy. Which of the following represents the greatest danger to this patient
1. Alveolar osteitis
2. Osteoradionecrosis
3. Prolonged healing
4. Fracture of the mandible
Oral Pathology
Answer: 2
The greatest danger to a patient requiring tooth extraction after radiation therapy is osteoradionecrosis.
Sickle cell trait patient do not have manifestations as that of Sickle cell disease, because-
1) 50% HbS is required for occurrence of sickling
2) HbA prevents sickling
3) 50% sickles
4) HbA prevents polymerization of Hbs
General Pathology
Answer: 1
HbA prevents sickling in sickle cell trait patients because the presence of normal hemoglobin (HbA) reduces the proportion of HbS, preventing polymerization.
Which of the following is not a form of ionising radiation
1. Alpha-particles
2. Beta-particles
3. X-rays
4. Radiowaves
Oral Pathology
Answer: 4
Radiowaves are not a form of ionizing radiation.
Which of the following is not a complication of therapeutic radiation
1. Mucositis
2. Xerostomia
3. Cervical caries
4. Paraesthesia of the tongue
Oral Pathology
Answer: 4
Paraesthesia of the tongue is not a complication of therapeutic radiation.
Which of the following is associated with a low concentration of ionized calcium in the serum?
1. Hypothyroidism
2. Osteogenesis imperfecta
3. Paget"s disease of the bone
4. Tetany
Oral Pathology
Answer: 4
Tetany is associated with a low concentration of ionized calcium in the serum.
Which of the following is not characteristic of congenital syphilis?
1. Ghon complex
2. Interstitial keratitis
3. Mulberry molars
4. Notched incisors
Oral Pathology
Answer: 1
Ghon complex is associated with primary tuberculosis, not congenital syphilis. The other options (interstitial keratitis, mulberry molars, and notched incisors) are indeed characteristics of congenital syphilis.