The width of residual bone was one of the clinical host factors that affected bone regeneration following BMP implantation. However, it did not affect connective tissue attachment, cementum regeneration, and downgrowth of junctional epithelium.

Transplantation of tissue-cultured teeth decreased epithelial downgrowth and increased connective tissue attachment on the root-planed surface. Furthermore, EMD could remarkably increase the new connective tissue attachment in this periodontal regenerative technique.