MDS PREP
The wavelength of X-ray photon depends upon
1. Milli amperage
2. Kilo voltage
3. Distance between source and object
4. Quantity of electrons in the cathod stream
Oral Pathology
Answer: 2
The wavelength of X-ray photons depends on the kilo voltage applied.
Which of the following is NOT a characteristic of MEN IIA?
1) Medullary thyroid carcinoma
2) Pheochromocytoma
3) Parathyroid adenomas
4) Mucosal neuromas
Mucosal neuromas are not a characteristic of MEN IIA; they are associated with MEN IIB.
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.
What is a characteristic feature of osteopetrosis?
1) Increased osteoclast activity
2) Thick and brittle bones
3) Elevated serum calcium
4) Increased bone resorption
Osteopetrosis is characterized by thick and brittle bones due to increased osteoclast activity, which is impaired, leading to abnormal bone remodeling.
Reiter's syndrome is associated with which of the following microbial agents?
1) Staphylococcus aureus
2) Streptococcus pyogenes
3) Borrelia burgdorferi
4) Shigella spp., Salmonella spp., Yersinia spp., Campylobacter jejuni, and Chlamydia trachomatis
Reiter's syndrome is associated with microbial agents such as Shigella spp., Salmonella spp., Yersinia spp., Campylobacter jejuni, and Chlamydia trachomatis.
When a shielded open cone is used the gonadal dose to a patient is mainly from
1. Leakage from tube
2. Primary X-ray tube
3. Scatters from patient"s face
4. All of the above
Oral Pathology
Answer: 3
The gonadal dose mainly comes from leakage from the tube when using a shielded open cone.
A five-year-old child presents with chronic bed wetting and bilateral loose deciduous first molars. His mother says that she wants to drink water several times during each night. Which of the followingis the most likely diagnosis?
1. Hand-Schuller-Christian disease
2. Marble bone disease
3. Nieman-Pick disease
4. Polyostotic fibrous dysplasia
Oral Pathology
Answer: 1
The most likely diagnosis for the child is Hand-Schuller-Christian disease, which can cause chronic bedwetting and dental issues.
Dens in dente is thought to arise as a result of
1. a normal tooth but enclaved within an other tooth, during formation
2. proliferation and evagination of an area of the inner enamel epithelium
3. extensive growth of mesenchymal cells of pulp tissue
4. an invagination of the enamel organ during tooth formation
Oral Pathology
Answer: 4
Dens in dente is a rare developmental dental anomaly that is characterized by a tooth with an invaginated or cavity-like structure that appears like a "tooth within a tooth." It arises from an error during the morphodifferentiation stage of tooth development.