Force magnitudes andor directions may be determined objectively using orthodontic brackets having an elastomeric member which allows one portion of the bracket to be resiliently moveable relative to at least on other portion of the bracket. An input data table name indicates the input table. In one of the embodiments, the invention provides a method for preparing a controlled release composition comprising the steps of:providing a mixture of a recombinant gelatin and a pharmaceuticalchemically cross-linking said recombinant gelatin to obtain a three dimensional network structure.