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.
An odontogenic neoplasm that may be mistaken for an ameloblastoma but is of mixed tissue origin and considerably less aggressive is
1) A cementoblastoma
2) An odontogenic fibroma
3) A cementifying fibroma
4) An ameloblastic fibroma
Oral Pathology
Answer: 4
An ameloblastic fibroma is a benign odontogenic tumor that contains both epithelial and mesenchymal components, making it a mixed tissue neoplasm. While it can resemble an ameloblastoma histologically, it is generally less aggressive and has a better prognosis. Ameloblastic fibromas are often found in younger patients and can be treated effectively with surgical excision.
Prolonged administration of broad spectrum antibiotics results in the formation of
1. Black hairy tongue
2. Decrease exposure time
3. Geographic tongue
4. Fissured tongue
Oral Pathology
Answer: 1
Prolonged administration of broad-spectrum antibiotics can lead to black hairy tongue.
The X-ray collimators commonly used in dentistry include the following except
1. Diaphragm collimator
2. Tubular collimator
3. Rectangular collimator
4. Square collimator
Oral Pathology
Answer: 4
Square collimators are not commonly used in dentistry.
Compound odontoma shows on a radiograph as
1) Supernumerary teeth
2) Radiolucent and radiopaque areas
3) Masses of calcified areas
4) Distinguishable tooth-like structures
Oral Pathology
Answer: 4
A compound odontoma is a benign odontogenic tumor consisting of enamel, dentin, cementum, and pulp arranged in recognizable tooth-like structures. Radiographically, it appears as multiple small, tooth-like radiopaque structures, unlike complex odontomas, which show as masses of calcified material.
Badges should be worn by dental technician every
1. 1 month
2. 3 months
3. 6 months
4. 4 months
Oral Pathology
Answer: 1
Badges should be worn by dental technicians every 3 months to monitor radiation exposure.
Disadvantages of using a GRID during radiography is
1. Increased patient exposure
2. Decreased exposure time
3. Increased secondary radiation fog to film
4. Reduces secondary radiation to film
Oral Pathology
Answer: 1
Using a GRID during radiography increases patient exposure due to the need for higher doses.
All of the following may occur in achondroplasia, except
1. Short and thickened muscular extremities
2. Dwarfism
3. The elbows often cannot be folded
4. Bowed legs and small hands
Oral Pathology
Answer: 3
In achondroplasia, the elbows often cannot be folded is not true; they can be folded.