Dental Education Lecture: Readjustment of Braces
One of Jeff's front teeth (#9 in Fig.1) is in cross bite. So he needs braces. Placement of individual brace (B) decides the position of the tooth later on. The doctor draws a cross (arrowheads), sticks the brace in the right place and place a wire (*), which is bent.
A few months later, the wire is straight and the tooth #9 is normal now (Fig.2). But the cutting edge of the tooth #8 is crooked (black line).
A cross is redrawn (Fig.3). Position of brace for the tooth #8 is changed from white line to black line. The wire just placed is bent again (*).
In 4 weeks, the wire becomes straight again, causing the tooth #8 to align well with neighboring teeth (Fig.4).
Xin Wei, DDS, PhD, MS 1st edition 04/11/2011, last revision 04/11/2011