MDS PREP
A developmental abnormality characterized by the presence of fewer than the usual number of teeth is
1) Anodontia
2) Oligodontia
3) Microdontia
4) Dens in dente
Oral Pathology
Answer: 2
1. Anodontia: This is the complete absence of teeth. It is a rare condition
where an individual fails to develop any teeth.
2. Oligodontia: This term is used when an individual has fewer teeth than the
typical dental formula, which is six incisors, two canines, two premolars, and
six molars in the permanent dentition (excluding the third molars or wisdom
teeth). The term "hypodontia" is often used synonymously with oligodontia, but
hypodontia can also refer to a broader range of conditions characterized by the
congenital absence of one or more teeth, whereas oligodontia is more
specifically the absence of six or more teeth.
3. Microdontia: This condition involves teeth that are smaller than normal. It
can affect either the primary or permanent dentition and may involve one tooth
or multiple teeth.
4. Dens in dente: This is a rare developmental anomaly where a tooth forms
within the dental crown of another tooth, typically in the form of a small
tooth-like structure. It is not a condition of tooth number but rather an
abnormality of tooth structure.
Unit of measurements to compare radiation damage
1. Exposure
2. Dose
3. Effective dose
4. Dose equivalent
Oral Pathology
Answer: 4
The unit of measurement to compare radiation damage is dose equivalent.
Letterer-Siwe disease is a disturbance of
1. Protein metabolism
2. Lipid metabolism
3. Mucopolysaccharide metabolism
4. Carbohydrate metabolism
Oral Pathology
Answer: 2
Letterer-Siwe disease is a disturbance of lipid metabolism.
In Peutz-Jeghers syndrome, the oral lesions are
1. Ulcerations of oral mucosa
2. Sebaceous glands of oral mucosa
3. Silver pigmentation of oral mucosa
4. None of the above
Oral Pathology
Answer: 3
In Peutz-Jeghers syndrome, the oral lesions are characterized by silver pigmentation of the oral mucosa.
Unusual extensibility of the tongue is a characteristic feature of
1. Epidermolysis bullosa
2. Syphilis
3. Darier-White disease
4. Ehlers-Danlos syndrome
Oral Pathology
Answer: 4
Unusual extensibility of the tongue is a characteristic feature of Ehlers-Danlos syndrome.
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.
Diabetes insipidus, exophthalmous and radiolucent bone defects within the skull are most suggestive of which of the following conditions
1. Sickle cell anaemia
2. Niemann-pick disease
3. Letterer-Siwe disease
4. Hand-Schuller-Christian disease
Oral Pathology
Answer: 4
Diabetes insipidus, exophthalmos, and radiolucent bone defects suggest Hand-Schuller-Christian disease.
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.