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Daily Warm-Ups Reading - Grade 7 (Nonfiction 3 - History)


Braces

Dental braces are also called orthodontic braces. They are used by dentists to realign and straighten teeth. In doing so, they can also improve dental health.

Braces have been used for thousands of years. Mummies have been found with braces. Ancient Greeks and Romans were found to have used braces. Over two hundred years ago, teeth were first extracted to help with overcrowding. Once teeth weren’t as crowded, braces could straighten teeth. A century later, wires and mild pressure were used to move teeth. During the twentieth century, the application and use of braces continued to be perfected.

About forty years ago, dentists developed braces that can be worn on the inside of the teeth and, therefore, are not visible. These were called lingual braces. One example was iBracesTM, made with the aid of digital computer imaging. They were popular for over a decade. Then, tooth-colored ceramic braces were invented. Ceramic braces can be any color the patient chooses.

Years ago, dentists learned that plastic dental appliances could aid in making minor movement changes in teeth. Not too long ago, two people who had braces developed a system using clear plastic molds. They applied 3D computer-aided technology, and the “Invisalign®” method was developed. The dental community was skeptical. Neither of the two inventors were dentists, nor had they studied in the field of medicine. Regardless, over the last ten years or so, these clear plastic brace appliances have become very popular.

Where will orthodontics go from here? Imaging continues to improve. Creative, new methods allow various metals to be used, such as nickel titanium alloys. Braces will soon be worn for shorter periods of time. They will continue to be less visible and will obtain better results.


Text Questions

What is the primary purpose of braces?





What does the word realign mean as it is used in the text?





Which of the following is not specifically a development in medical technology?





What is the purpose of the first paragraph?





In what ways might braces improve dental health? Give examples to support your answer.


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