MDS PREP
The most common malignancy of the oral cavity is
1. Basal cell carcinoma
2. Fibrosarcoma
3. Squamous cell carcinoma
4. Adenosarcoma
Oral Pathology
Answer: 3
Which of the following is incorrect for Hemophilia A?
1. It is transmitted by female carriers and is manifested in males
2. It is caused by a deficiency of antihemophilic globulin
3. Bleeding time is prolonged and clotting time is normal
4. It is a sex-linked recessive disorder
Oral Pathology
Answer: 3
Epithelium of the oral cavity differs from the epithelial lining of the cyst in
1. Stratum corneum
2. Stratum incidum
3. Stratum germinativum
4. Spinous cell layer
Oral Pathology
Answer: 3
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.
Dens in dente occurs when there is an invagination, or a folding inward, of the enamel organ into the dental papilla during the development of a tooth. This results in a structure that is essentially a tooth within the crown of another tooth. The outer tooth forms around this invagination, creating a cavity filled with enamel and sometimes dentin. The inner tooth, or the dens in dente, can have varying degrees of pulp tissue and may sometimes be connected to the main tooth by a communication channel.