MDS PREP
The following is an inappropriate statement on Buerger"s disease
1) Intermittent claudication is the first symptom
2) It is commonly in smokers and smoking has to be avoided during treatment
3) Incidence is higher in diabetics and middle aged females
4) None of the above
Oral medicine
Answer: 3
Heating a gypsum cast to a temperature above 90o C will
1. Cause it to expand
2. Remove water of crystallization
3. Strengthen it
4. Eliminate excess gauging water
Dental Material
Answer: 2
Heating a gypsum cast to a temperature above 90°C will remove water of
crystallization and strengthen it. This process is called "burning out" the
gypsum, and it is used to remove the remaining moisture and improve the cast's
stability and accuracy.
Gypsum casts are made by mixing plaster of Paris (calcium sulfate hemihydrate)
with water. When the material sets, it forms calcium sulfate dihydrate crystals
with water molecules trapped within the crystal lattice, known as water of
crystallization. Heating the cast above 90°C causes the water of crystallization
to be released, which results in the cast becoming stronger and more rigid. This
process does not cause the cast to expand but rather to shrink slightly as the
water is removed. Excess gauging water is typically removed during the initial
setting process.
Radiographic finding of generalised widening of periodontal ligament with "button hole" mouth is found in
1. Osteosarcoma
2. Scleroderma
3. Apical scar
4. Solar elastosis
Radiology
Answer: 2
Radiographic finding of generalized widening of the periodontal ligament with "button hole" mouth is found in scleroderma.
All of the following are true about gutta-percha cone except
1) Gutta-percha is composed of 60-85 % gutta-percha and 20 % zinc oxide
2) Used in lateral condensation method
3) When heated exists in a & b form
4) All of the above are true
Endodontics
Answer: 1
If a coil and tag of a palatal canine retractor are placed too far distally
1) Base plate is weakend
2) Tooth movement will be slowed
3) Tooth will tend to be moved buccally
4) Tooth will tend to be moved palatally
Orthodontics
Answer: 3
If the coil and tag of a palatal canine retractor are placed too far distally,
the force applied will tend to move the tooth buccally
(toward the cheek) rather than palatally (toward the
palate), which can hinder the intended movement.
Which of the following is the most common bone expanding lesion in the 20 to 30 year age group?
1. Osteitis fibrosa cystica
2. Hyperthyroidism
3. Paget’s disease
4. Acromegaly
Oral Pathology
Answer: 1
What type of genome do Hepatitis B viruses have?
1) ssRNA
2) dsDNA
3) ssDNA
4) dsRNA
General Microbiology Answer: 2Hepatitis B viruses possess a double-stranded DNA (dsDNA) genome, which is unique among the hepatitis viruses. This dsDNA is partially double-stranded and circular, playing a crucial role in the virus life cycle and replication.
9 months of age, is the usual eruption time for
1. primary mandibular canines
2. primary maxillary canines
3. primary maxillary first molars
4. primary lower lateral incisors
Dental Anatomy
Answer: 4
9 months of age, is the usual eruption time for primary lower lateral incis