1. Instruments may not be sterilized makes the chance of getting a disease from the saliva of the user service before the party may be infected with such as Hepatitis B virus, tuberculosis, influenza, influenza, diphtheria, polio
2.The materials used have no quality contaminant that is heavy metals such as lead, arsenic, and if the accumulated into a lot of body will be harmful to the body. 3. Procedure of insecure because people do not specialized dentists
4.Customized orthodontic wire by those who have no knowledge will make the arrangement of teeth changed. Have a toothache may make the tooth is a tooth die. And maybe have a tooth that away
5.Putting the Invisalign fashion is usually cause cut inside of your cheek. Or tissue in oral became a wound, the risk of cancer and tetanus
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