Teeth : Incisors , Canine , Molars and Premolars

Teeth help a person use their mouth to eat, speak, smile and give shape of their face. Each type of tooth has name and specific function.


Teeth are made up from different layers :-
Enamel ,dentin , pulp and cementum. Enamel , which is hardest substance in body , is on outside of the tooth. The second layer dentin , which is softer than Enamel. And deepest layer inside the tooth is pulp. Which consist of nerves and blood vessels. Cementum is on root of tooth and is beneath to gums.


The study of teeth with respect to their number , arrangement , development etc is known as dentition.


Teeth :- 32 Teeth are present in buccal cavity of adult human being.Human dentition is described as thecodont , diphyodont and heterodont. It is called the codont type because each tooth is fixed in separate socket present in jaw bones by gomphosis type of joint. In our life time , we get only two sets of teeth, milk teeth this is called diphyodont dentition . We have four different type of teeth hense we are heterodont. Types of teeth incisors ( I ) , Canines (C) , Premolars (PM) and Molar ( M ) each half of each jaw has two incisors , one canine , two premolars and three molars .

What is Incisors?
Your 8 incisors teeth are located in front part of your mouth you have four of them in your upper jaw and four in your lower jaw. Incisors are shaped like small chisels.

What is Canines ?
Your four canine teeth sit next to incisors. You have two canine on the top of your mouth and two on the bottom. Canines have sharp, pointy surface for tearing food. The baby canine come in between the ages 16 months and 20 months.

What is Molars ?
Your 12 molars are biggeest and strongest teeth you have six on the top and six on the bottom. The main eight molars are sometimes divided into 6 years and 12 years molar , based on when typically grow in.


A tooth consists of the portion that projects above the gum called crown and root that is made up of two or three projections which are embeded in gun. A short neck connects the hardest substance of the body called enamel . Enamel is made up of calcium carbonate. Basic shape of tooth is derived from dentin , a calcified connective tissue . The dentin enclosed a cavity called pulp cavity. It is filled with connective tissue pulp. Pulp cavity has extension in the root of tooth called root canal . The Dentin of the root of tooth is covered by ceremtum . A bone like substance that attaches the root to surrounding socket in gum.

What is Depression ? : Causes , Symptoms and Treatment

Sadness , feeling down and having loss of interest in daily activities are familiar feelings for all of us but if they persist and affect our lives substantially the issue may be Depression.
A group of conditions associated with the elevation of lowering of persons mood such as Depression.

Definition
Depression is mood disorder that involve persistent feeling of sadness and loss of interest.It is different from the mood fluctuations that people regularly experience as part of life. Depression is on going problem is an ongoing problem ,not a passing one . It consist of episodes during which the symbols last for at least 2 weeks . Depression can last for several weeks,months or years.

•What is Depression ?
Depression is common and serious medical illness that negatively affects how you feel the way you think and how you act. fortunately,it is also treatable.Depression causes feeling of sadness and /or loss of interest in activities once enjoyed .It can lead to variety of emotional and physical problems and can decrease person’s ability to function at work and at home.

•Sign and symptoms
The symptoms of Depression can include:-
• A depressed mood .
• reduced interest in activities once enjoyed.
• A loss of sexual desire.
• Changes in appetite.
• Unintentional weight loss or gain.
• Sleeping to much or too little.
• Agitation, restlessness up and down.
• slowed movement and speech.
• fatigue or loss of energy.
• Feeling of worthlessness or guilty.
• Difficulty thinking,Concentrating or making desicions.
• Recurrent thought of death or suicide, or an attempt at suicide.

• In female :-
Depression is nearly twice common among women as men , according to the centers for disease control and prevention.
Below are some symtoms of Depression that tend to appear move often in females .
• irritability
• anxiety
• fatigue
• ruminating
Also ,some types of Depression are unique to females ,such as
• Postpartum Depression
• Premenstrual dysphoric disorder.

• In males
Around 9% men in United state having feelings of Depression or anxiety. according to American psychological association.
Males with depression are more likely than females to drinks alcohol in excess , display anger,and engage in risk- taking as a result of the disorder .
Other symptoms of Depression in males :-
• Avoiding families and social situations.
• Working without a  Break
• Having Difficulty keeping up  with work and family responsibility .
• Controlling behaviour in relationship.

How Depression Treated ?
Depression is among the most treatable of mental disorders. Between 80% and 90%. Of people with depression eventually respond well to treatment almost all patients gain some relief from their symptoms.
Before a diagnosis or treatment  a health professional should conduct a through diagnostic evaluation. including an interview and possibly physical examination . In some cases , a blood test might be done make sure the depression is not due to medical condition like a thyroid problem. The evaluation is identify specific symptoms , medical and family history, cultural factors and environment factors to arrive at diagnosis and plan a course of action.

• Psychotherapy

• Drug treatment

• Medication

A group of conditions associated with the elevation of lowering of persons mood such as Depression.