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.
A palatal obturator is a prosthesis that totally occludes an opening such as an oronasal fistula (in the roof of the mouth). They are similar to dental retainers, but without the front wire. palatal obturator may be used in cases of a deficiency in tissue, when a remaining opening in the palate occurs. In some cases it may be downsized gradually so that tissue can strengthen over time and compensate for the decreasing size of the obturator.