Evidence is growing that this âdigit ratioâ, especially when applied to the right hand, is a fundamental indicator of sexuality, aggression and Â­diseases suffered by men. 1  Pointing the finger: Scientists have noticed a relationship between finger measurements and a host of unrelated traits. This week, for example, strong evidence has emerged of a link between the â2D:4D finger ratioâ and a manâs likelihood of developing prostate cancer.
The palatal expander appliance is a specially made device used to widen the upper arch or roof of the mouth. By widening the upper arch, the upper teeth line up better with the lower teeth, giving the patient a better bite. Widening the palate makes room for crowded teeth to align better.
Orthodontists help to straighten crooked teeth and treat problems with jaw development and facial growth. One of the most important orthodontic tools is the palatal expander. This appliance prevents, reduces, or corrects the severity of some jaw and teeth problems leaving room for growth of teeth. The palatal expander works by gently expanding the roof of the mouth and upper jaw. Timing is the key to this deviceâs efficiency.