Chromosomal considerations--application of modern cytogenetics.

Attention is directed towards the use of new techniques in cytogenetics. C-, G-, Q-, and R-banding methods are briefly discussed and illustrated. Methods of sister chromatid differential staining and silver staining for demonstration of nucleolus organizing regions are reviewed and their application in medical cytogenetics is pointed out. Frequency of chromosomal aberration and the importance of the orofacial area in diagnosis of chromosomal syndromes are the bases for the argument for the usefulness of cytogenetics in the field of stomatology-dentistry.