Dental and Oral Biology

It is in anaemia that the haemoglobin in the blood reduces. It is caused by the deficiency of iron. Hence, the oxygen carrying capacity of the blood reduces. It is in night blindness that the patient cannot see in dim light. In anaemia, the haemoglobin in the blood reduces.

This is the correct option. Molars are 12 in number in an adult human mouth.

Carnassials are paired upper and lower teeth (either molars or premolars and molars) modified in such a way as to allow enlarged and often self-sharpening edges to pass by each other in a shearing manner. The modification arose separately in several groups of carnivorous mammals. Different pairs of teeth were involved in the separate modifications. In modern Carnivora, the carnassials are the modified fourth upper premolar and the first lower molar. These teeth are also referred to as sectorial teeth.

The dental pulp is the part in the centre of a tooth, which is made up of living connective tissues and cells, called odontoblasts.

Ivory is the material from which the teeth and tusks of animals are made. It is also called as enamel. It covers the surface of the tooth or tusk. 

Yes, it is correct. Milk teeth grows during infancy, fall of at the age between 6- 8 years and are replaced by permanent teeth.

Dentine forms the majority of tooth structure, lying beneath the enamel and surrounding the pulp cavity. While enamel is the hardest outer covering, it's relatively thin. The pulp cavity contains soft tissue and nerves, while 'root' refers to the portion embedded in gum, not a tissue type.

Molars are large, flat teeth located at the back of the mouth designed for grinding and crushing food. Canines are pointed for tearing, incisors are sharp for cutting, and 'milk teeth' refers to baby teeth, not a tooth type.

Vitamin C is responsible for keeping gums healthy Vitamin C deficiency leads to scurvy which is characterized by swollen gums and loosening of teeth.

Two: A snake has two hollow teeth which deliver the poison.

The intraligamentary technique is a type of local infiltration technique to provide a single tooth anesthesia.

The solution is deposited alongside the periosteum and not above the periosteum. The success of these injections depends on the diffusion of the anesthetic solution through the periosteum and into the underlying bony structure to come in contact with the nerves therein.

In 1973, Gow Gates described the true mandibular nerve block by depositing anesthetic solution at the neck of the condyle. A single injection provides hard and soft tissue anesthesia of the mandible to the midline.

When the patient is sitting in the dental chair, the brain is placed in a superior position and is the most susceptible to the reduced blood volume flow resulting in syncope. This is a form of neurogenic shock and is caused by cerebral ischemia secondary to vasodilation with a corresponding drop in blood pressure.

During the development of teeth, the apical foramen is funnel shaped with the wider portion extending outward. The mouth of the funnel is filled with periodontal tissue, which is later replaced by dentin and cementum.