Erythropoietin is produced by

# Erythropoietin is produced and released by ?
A. Glomerular capillaries
B. Proximal tubular cells
C. Peritubular capillary lining cells of kidney
D. All of the above

The correct answer is C. Peritubular capillary lining cells of kidney.

Physiologic regulator of RBC production, glycoprotein hormone EPO, is produced & released by
highly specialized epithelial-like peritubular capillary lining cells within kidney.

Ref: Harrison’s 18th Ed. 448

Role of Erythropoietin

# In the absence of erythropoietin (EPO), committed erythroid progenitor cells undergo ?
A. Stunted growth
B. Halting of growth
C. Programmed cell death (apoptosis)
D. Change to other series of hematopoietic cell

The correct answer is C. Programmed cell death (apoptosis).

For RBC production, EPO is the regulatory hormone. It is required for maintenance of committed

erythroid progenitor cells which undergoes programmed cell death (apoptosis) if EPO is absent.

Ref: Harrison’s 18th Ed. 448

Painful preauricular lymphadenopathy is a feature of

# Painful preauricular lymphadenopathy is a feature of ?
A. Cat-scratch disease
B. Tularemia
C. Tuberculosis
D. Syphilis

The correct answer is B. Tularemia.

Painful preauricular lymphadenopathy is unique to tularemia and distinguishes it from catscratch

disease, tuberculosis, sporotrichosis, and syphilis. 

Ref: Harrison’s 17th Ed. 978

Tularemia, also known as rabbit fever, is an infectious disease caused by the bacterium Francisella tularensis. Symptoms may include fever, skin ulcers, and enlarged lymph nodes. Occasionally, a form that results in pneumonia or a throat infection may occur.

The bacterium is typically spread by ticks, deer flies, or contact with infected animals. It may also be spread by drinking contaminated water or breathing in contaminated dust. It does not spread directly between people. Diagnosis is by blood tests or cultures of the infected site.

Multiple Choice Questions In Conservative Dentistry - Tooth Colored Restorations

# Restoration of angle fracture of anterior teeth can be done by:
A. Amalgam
B. Composite resin
C. Glass ionomer cement
D. All of the above

# Replanted avulsed tooth can be aesthetically stabilized by:
A. Occlusal splints
B. Composite resins
C. Arch bar
D. All of the above

# The main disadvantages of composites not being recommended for class II posterior restorations are:
A. Color matching is not good
B. Lacks sufficient strength
C. Occlusal wear
D. Frequent fractures at the isthmus

Not a contraindication to dental implant

# Which of the following conditions is not a contraindication to dental implant placement?
A. Diminished healing capacity of the patient's tissues
B. Current chemotherapy for the treatment of cancer
C. History of radiation therapy to the maxillofacial complex
D. Dysmorphophobia
E. Advanced patient age

Advanced patient age is not a contraindication to implant treatment. The ability of the
patient to withstand surgical treatment, etc. is a decision resting on the systemic health
of the patient.

Any condition that causes an impairment of the patient's ability to heal should be considered
as a contraindication to implant treatment. Serious psychiatric conditions such as psychoses should be considered a contraindication to implant treatment. Dysmorphophobia is an extremely irrational fear of being disfigured by treatment. Psychiatric complications can make the patient change his or her opinion about the acceptability of treatment which is difficult for the clinician to overcome.

Greatest esthetic challenge for the restorative dentist

# The greatest esthetic challenge for the restorative dentist occurs in the patient having a:
A. High smile line, thick periodontal biotype
B. Low smile line, thin periodontal biotype
C. Low smile line, thick periodontal biotype
D. High smile line, thin periodontal biotype

The correct answer is D. High Smile line, thin periodontal biotype

A low smile line indicates that the patient does not lift the lip upwards when smiling to
the extent that the gingival-restorative interface can be seen by the observer. Consequently,
esthetic compromises may be more acceptable to the patient because they are not routinely
visible. A thick periodontal biotype indicates that the patient has thicker, denser gingiva with a less pronounced scallop. This type of tissue is more resistant to the recession caused by restorative procedures and materials, a lower chance of "show-through" of the implant or abutment, and a lower chance of loss of the papillae adjacent to the implant.

Shade selection for composite restoration

# Shade selection for composite restoration in anterior teeth should be done:
 A. After end of etching
 B. After prolonged drying
 C. Before prolonged drying
 D. After applying bonding agent

The correct answer is C. Before prolonged drying.

For shade selection, the teeth should be moist and should not be dehydrated. A dehydrated tooth gives a whiter appearance due to scattering and reflection of light. Bleaching procedures if any should be done before shade selection.