PGCEE MDS 2022: Gubernacular canal guides the eruption of:

 # Gubernacular canal guides the eruption of:

a) Primary teeth 

b) Permanent teeth

c) First molar

d) Third molar

The correct answer is B. Permanent teeth. 

Actually the correct answer is Succedaneous teeth. Because, not all permanent teeth have a gubernacular canal. The gubernacular canal and cord help in guiding the permanent teeth during the process of eruption. Except molars, all the permanent teeth (incisors, canines, and premolars) are known as succedaneous teeth because they take the place of their primary predecessors.

Permanent molars are not succedaneous teeth, as they develop from the distal extension of the dental lamina. Successional lamina, which is present on the lingual side of primary dental lamina, is absent for permanent molars.

PGCEE MDS 2022: Chronic burrowing ulcer is caused by:

 # Chronic burrowing ulcer is caused by:

a) Microaerophilic streptococci

b) Peptostreptococcus

c) Streptococcus viridans 

d) Streptococcus pyogenes

The correct answer is A. Microaerophilic Streptococci.

Chronic burrowing type of ulcer is due to symbiotic action of microaerophilic non-haemolytic streptococci and hemolytic Staphylococcus aureus. Clinically it is undermined ulcer with lot of granulation tissue in the floor. This condition is painful, toxaemic and the general condition of the patient deteriorates without treatment. Radical drainage is necessary for cure, antibiotics alone being useless. 

Dhangadi Sanjeevani Dental, Dhangadi, Kailali

 Name of Dental Clinic: Dhangadi Sanjeevani Dental

Address (Full): Dhangadi Kailali

Year of Establishment: 2079

Name of the chief Dental Surgeon: Dr. Amrit Raj Jaishi

CONTACT NUMBER: 9860644282

NMC Number of Dental Surgeon: 30037

CLICK HERE TO VIEW ALL DENTAL CLINICS OF SUDURPASCHIM PROVINCE

PGCEE MDS 2022: Histochemical demonstration of glycogen in the cells can help in the diagnosis of:

 # Histochemical demonstration of glycogen in the cells can help in the diagnosis of:

a) Malignant melanoma 

b) Squamous cell carcinoma

c) Kaposi's sarcoma 

d) Ewing's sarcoma

The correct answer is D. Ewing's sarcoma.

Ewing's sarcoma also called round cell sarcoma, seen in children and young adults, is characterized by painful swelling of the involved bone, facial neuralgia and lip paresthesia. It produces an irregular diffuse radiolucency, onion-skin and sun ray appearance of bone. Histologically, the neoplasm is composed of solid sheets of round cells, arranged in Filigree pattern. Intracytoplasmic glycogen of these cells helps in the differentiation from reticulum cell sarcoma.