To develop a new periodontal index for longitudinal studies of the periodontal disease was decided following a critical review of existing knowledge. As the first phase of index development, this study was to determine the inter- and intra- observer variation in assessing the parameter of gingival stripling, gingival redness, gingival bleeding, pocket pus, gingival ulceration, gingival recession level and pocket depth, as well as to determine the inter-parameter relationship.

McDonald, J. (Supervisor)