怎样保护牙齿英文版的快一点.一份报告.保护牙齿英文版

怎样保护牙齿英文版的快一点.一份报告.保护牙齿英文版
怎样保护牙齿英文版的
快一点.一份报告.保护牙齿英文版

怎样保护牙齿英文版的快一点.一份报告.保护牙齿英文版
In order to protect the teeth,we must first understand the structure of teeth.Human teeth is the most solid organs.There are bite cutting,tearing,grinding food and to assist the functions of pronunciation.One's life has two teeth:one for the deciduous teeth,a total of 20,the lower jaw of the 10.About six months after birth around the beginning of the eruption,about a two-year-old semi-homogeneous,since the period of 7-12 years of age,shedding of deciduous teeth after another; another deputy for the permanent teeth,a total of 32,the lower jaw of the 16,since the 6-year-old from gradually to the replacement of deciduous teeth,in addition to 12-year-old before and after the first 3 molars,the eruption of permanent teeth all.No.3 in the 20-year-old molars in general after the eruption,also known as wisdom teeth.Wisdom can also be no life,so 28 to 32 permanent teeth are normal.
Sub-crown tooth,dental root neck and three parts.Crown that is,we can see part of the teeth exposed to the outside part of gum.Crown covered with a layer of enamel surface,enamel is the hardest body organization,hardness similar to quartz.Root is embedded in the upper and lower jaw part of the alveolar process.Coated with a layer of the root cementum.Tooth crowns and cervical root lies between the slightly smaller part of the outsourcing gums.Mainly by the quality of dental tooth structure,known as the internal cavity of the tooth cavity.Teeth cavity filling in vivo there is connective tissue,nerves and blood vessels,as the pulp.Blood vessels and nerves from the apical hole.Suffering from dental caries,when the bacterial corrosion of tooth enamel and quality into the pulp cavity and stimulate the nerve,the pain.(See Figure 37) the students to protect their teeth,it is necessary to do the following:
1.To develop good brushing habits.Gargle with warm water after a meal,brush your teeth once each morning and evening.The frequency of brushing is not too much more it will damage teeth,brush your teeth should not be too long a time.Attention should be paid to brushing their teeth the right way:down the teeth,brush竖着,再刷outside刷完inside.Lateral force can not brush back and forth,otherwise they will damage gums.
2.Usually pay attention to dental health,and protect teeth.Usual to eat less candy.In particular,it is not candy临睡前to prevent dental caries.In addition,attention should be paid to health habits usually do not bite finger,do not bite a pencil top foreign body,the teeth do not lick the tongue.
3.If the tooth is sick,should be on time.A bad case of tooth decay and should be repaired or removal.
To achieve the above is not difficult,the key is to persevere.Students would like to have a healthy and beautiful teeth.