MDS PREP
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.
X-rays are generated when a stream of electrons travelling from tungsten filament is suddenly stopped by its impact on the
1. Gruntled filament
2. Anodic tungsten target
3. Cathodic tungsten target
4. Molybdenum lining of anode
Oral Pathology
Answer: 2
X-rays are generated when a stream of electrons traveling from the tungsten filament is suddenly stopped by its impact on the anodic tungsten target.
Hyperplasia or hypertrophy of minor salivary glands in the palate may be associated with all of the following except
1. Pernicious anaemia or iron deficiency anaemia
2. Alcoholism
3. Diabetes mellitus
4. Menopause
Oral Pathology
Answer: 1
Hyperplasia or hypertrophy of minor salivary glands in the palate is not typically associated with pernicious anemia.
Hypercalcaemia is seen in
1. Hyperparathyroidism
2. Hypoparathyroidism
3. Hyperthyroidism
4. Hypthyroidism
Oral Pathology
Answer: 1
Hypercalcemia is commonly seen in hyperparathyroidism.
The prothrombin levels that is of concern to dentist extraction is
1. 20 % normal PT
2. 40 % normal PT
3. 50 % normal PT
4. 100 % normal PT
A prothrombin level of 20% normal PT is of concern for dental extractions.
For extraction in a leukaemic patient
1. Consult physician
2. Obtain WBC count
3. Ontain platelet count
4. All of the above
Oral Pathology
Answer: 4
For extraction in a leukemic patient, all of the above steps should be taken.
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.
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.