The arch width changes were measured and the forces generated were determined over an eight week period. The control wires continued to expand throughout the study. The force generated by the control group and experimental group expansion was capable of producing tooth movement. The pedodontic admission histories of 1600 Mexican children were analyzed, to determine general epidemiologic factors or oral habits, as well as their relationship with identifiable biopsychosociologic factors. Oral habits should be considered a major health hazard because of their high incidence.
Successful treatment requires a multidisciplinary approach to the basic cause of the problem.
Low birth-weight and the relationship to developmental problems. A general introduction is provided into the causes, prevalence and long term consequences of low birth-weights. Although the vast majority of low birth-weight children have normal outcomes, as a group they have higher rates of subnormal growth, illnesses and neurodevelopmental problems. An increased awareness of the consequences of low birth-weight is needed as dentists provide services for this population of youngsters. Poor children remain poor.