Down Syndrome

Payel Patel
Feb,08,2010
bolt down Syndrome Term Paper - Dental Hygiene

overmaster syndrome affects mint of all ages, races and economic levels. It is the most frequently occurring chromosomal mental defectiveness found in humans (About waste, 2001). Each socio-economic class, one sister in every 800 births in the United States is born with pass syndrome. Of the approximately four million births in the United States per year 5,000 newborns with Down syndrome can be expected (Buxton & Hunter, 1999). in that respect atomic number 18 both physical and orofacial features that are characteristic of Down syndrome. many another(prenominal) health and dental concerns are associated with those who have Down syndrome and unfortunately there is no known effective medical treatment available at this time.
John Langdon Down who published an true description of a person with Down syndrome discovered Down syndrome in 1866, although he did not know the cause of the syndrome. He was then termed the father of the syndrome (About Down, 2001). Nearly a century after in 1959, Down syndrome was associated with an extra chromosome. A person with Down syndrome has 47 chromosomes whereas a normal individual has 46. The excess genetical material from this extra chromosome is in the form of additional genes on the 21st chromosome, resulting in the characteristics of Down syndrome.



Most of all the cases of Down syndrome occur because there are three copies of the 21st chromosome, so therefore Down syndrome is often referred to as trisomy 21 (About Down, 2001).
There are three different types of Down syndrome. The three forms are trisomy 21, translocation, and mosaicism. It is important to distinguish what type the child has, as the come across of the parents having another child with the syndrome depends on which form their child has. In one of the forms, the degree to which the child shows the characteristics of the syndrome is affected (Selikowitz, 1997).
Nearly 95 percent of the cases of Down syndrome have trisomy 21. This is where the child has an...If you want to take in a full essay, order it on our website: Orderessay



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